Get collab2 green

Cargo.lock

@@ -1710,6 +1710,78 @@ dependencies = [
  "workspace",
 ]
 
+[[package]]
+name = "collab2"
+version = "0.28.0"
+dependencies = [
+ "anyhow",
+ "async-trait",
+ "async-tungstenite",
+ "audio2",
+ "axum",
+ "axum-extra",
+ "base64 0.13.1",
+ "call2",
+ "channel2",
+ "clap 3.2.25",
+ "client2",
+ "clock",
+ "collab_ui",
+ "collections",
+ "ctor",
+ "dashmap",
+ "editor2",
+ "env_logger 0.9.3",
+ "envy",
+ "fs2",
+ "futures 0.3.28",
+ "git3",
+ "gpui2",
+ "hyper",
+ "indoc",
+ "language2",
+ "lazy_static",
+ "lipsum",
+ "live_kit_client2",
+ "live_kit_server",
+ "log",
+ "lsp2",
+ "nanoid",
+ "node_runtime",
+ "parking_lot 0.11.2",
+ "pretty_assertions",
+ "project2",
+ "prometheus",
+ "prost 0.8.0",
+ "rand 0.8.5",
+ "reqwest",
+ "rpc2",
+ "scrypt",
+ "sea-orm",
+ "serde",
+ "serde_derive",
+ "serde_json",
+ "settings2",
+ "sha-1 0.9.8",
+ "smallvec",
+ "sqlx",
+ "text2",
+ "theme2",
+ "time",
+ "tokio",
+ "tokio-tungstenite",
+ "toml 0.5.11",
+ "tonic",
+ "tower",
+ "tracing",
+ "tracing-log",
+ "tracing-subscriber",
+ "unindent",
+ "util",
+ "uuid 1.4.1",
+ "workspace2",
+]
+
 [[package]]
 name = "collab_ui"
 version = "0.1.0"
@@ -7204,8 +7276,10 @@ dependencies = [
  "rsa 0.4.0",
  "serde",
  "serde_derive",
+ "serde_json",
  "smol",
  "smol-timeout",
+ "strum",
  "tempdir",
  "tracing",
  "util",

Cargo.toml

@@ -16,6 +16,7 @@ members = [
     "crates/client2",
     "crates/clock",
     "crates/collab",
+    "crates/collab2",
     "crates/collab_ui",
     "crates/collections",
     "crates/command_palette",

crates/collab2/.env.toml

@@ -0,0 +1,12 @@
+DATABASE_URL = "postgres://postgres@localhost/zed"
+DATABASE_MAX_CONNECTIONS = 5
+HTTP_PORT = 8080
+API_TOKEN = "secret"
+INVITE_LINK_PREFIX = "http://localhost:3000/invites/"
+ZED_ENVIRONMENT = "development"
+LIVE_KIT_SERVER = "http://localhost:7880"
+LIVE_KIT_KEY = "devkey"
+LIVE_KIT_SECRET = "secret"
+
+# RUST_LOG=info
+# LOG_JSON=true

crates/collab2/Cargo.toml

@@ -0,0 +1,101 @@
+[package]
+authors = ["Nathan Sobo <nathan@zed.dev>"]
+default-run = "collab2"
+edition = "2021"
+name = "collab2"
+version = "0.28.0"
+publish = false
+
+[[bin]]
+name = "collab2"
+
+[[bin]]
+name = "seed"
+required-features = ["seed-support"]
+
+[dependencies]
+clock = { path = "../clock" }
+collections = { path = "../collections" }
+live_kit_server = { path = "../live_kit_server" }
+text = { package = "text2", path = "../text2" }
+rpc = { package = "rpc2", path = "../rpc2" }
+util = { path = "../util" }
+
+anyhow.workspace = true
+async-tungstenite = "0.16"
+axum = { version = "0.5", features = ["json", "headers", "ws"] }
+axum-extra = { version = "0.3", features = ["erased-json"] }
+base64 = "0.13"
+clap = { version = "3.1", features = ["derive"], optional = true }
+dashmap = "5.4"
+envy = "0.4.2"
+futures.workspace = true
+hyper = "0.14"
+lazy_static.workspace = true
+lipsum = { version = "0.8", optional = true }
+log.workspace = true
+nanoid = "0.4"
+parking_lot.workspace = true
+prometheus = "0.13"
+prost.workspace = true
+rand.workspace = true
+reqwest = { version = "0.11", features = ["json"], optional = true }
+scrypt = "0.7"
+smallvec.workspace = true
+sea-orm = { version = "0.12.x", features = ["sqlx-postgres", "postgres-array", "runtime-tokio-rustls", "with-uuid"] }
+serde.workspace = true
+serde_derive.workspace = true
+serde_json.workspace = true
+sha-1 = "0.9"
+sqlx = { version = "0.7", features = ["runtime-tokio-rustls", "postgres", "json", "time", "uuid", "any"] }
+time.workspace = true
+tokio = { version = "1", features = ["full"] }
+tokio-tungstenite = "0.17"
+tonic = "0.6"
+tower = "0.4"
+toml.workspace = true
+tracing = "0.1.34"
+tracing-log = "0.1.3"
+tracing-subscriber = { version = "0.3.11", features = ["env-filter", "json"] }
+uuid.workspace = true
+
+[dev-dependencies]
+audio = { package = "audio2", path = "../audio2" }
+collections = { path = "../collections", features = ["test-support"] }
+gpui = { package = "gpui2", path = "../gpui2", features = ["test-support"] }
+call = { package = "call2", path = "../call2", features = ["test-support"] }
+client = { package = "client2", path = "../client2", features = ["test-support"] }
+channel = { package = "channel2", path = "../channel2" }
+editor = { package = "editor2", path = "../editor2", features = ["test-support"] }
+language = { package = "language2", path = "../language2", features = ["test-support"] }
+fs = { package = "fs2", path = "../fs2", features = ["test-support"] }
+git = { package = "git3", path = "../git3", features = ["test-support"] }
+live_kit_client = { package = "live_kit_client2", path = "../live_kit_client2", features = ["test-support"] }
+lsp = { package = "lsp2", path = "../lsp2", features = ["test-support"] }
+
+node_runtime = { path = "../node_runtime" }
+#todo!(notifications)
+#notifications = { path = "../notifications", features = ["test-support"] }
+
+project = { package = "project2", path = "../project2", features = ["test-support"] }
+rpc = { package = "rpc2", path = "../rpc2", features = ["test-support"] }
+settings = { package = "settings2", path = "../settings2", features = ["test-support"] }
+theme = { package = "theme2", path = "../theme2" }
+workspace = { package = "workspace2", path = "../workspace2", features = ["test-support"] }
+
+collab_ui = { path = "../collab_ui", features = ["test-support"] }
+
+async-trait.workspace = true
+pretty_assertions.workspace = true
+ctor.workspace = true
+env_logger.workspace = true
+indoc.workspace = true
+util = { path = "../util" }
+lazy_static.workspace = true
+sea-orm = { version = "0.12.x", features = ["sqlx-sqlite"] }
+serde_json.workspace = true
+sqlx = { version = "0.7", features = ["sqlite"] }
+unindent.workspace = true
+
+[features]
+seed-support = ["clap", "lipsum", "reqwest"]

crates/collab2/README.md

@@ -0,0 +1,5 @@
+# Zed Server
+
+This crate is what we run at https://collab.zed.dev.
+
+It contains our back-end logic for collaboration, to which we connect from the Zed client via a websocket after authenticating via https://zed.dev, which is a separate repo running on Vercel.

crates/collab2/admin_api.conf

@@ -0,0 +1,4 @@
+db-uri = "postgres://postgres@localhost/zed"
+server-port = 8081
+jwt-secret = "the-postgrest-jwt-secret-for-authorization"
+log-level = "info"

crates/collab2/basic.conf

@@ -0,0 +1,12 @@
+
+[Interface]
+PrivateKey = B5Fp/yVfP0QYlb+YJv9ea+EMI1mWODPD3akh91cVjvc=
+Address = fdaa:0:2ce3:a7b:bea:0:a:2/120
+DNS = fdaa:0:2ce3::3
+
+[Peer]
+PublicKey = RKAYPljEJiuaELNDdQIEJmQienT9+LRISfIHwH45HAw=
+AllowedIPs = fdaa:0:2ce3::/48
+Endpoint = ord1.gateway.6pn.dev:51820
+PersistentKeepalive = 15
+

crates/collab2/collab/.env.toml

@@ -0,0 +1,12 @@
+DATABASE_URL = "postgres://postgres@localhost/zed"
+DATABASE_MAX_CONNECTIONS = 5
+HTTP_PORT = 8080
+API_TOKEN = "secret"
+INVITE_LINK_PREFIX = "http://localhost:3000/invites/"
+ZED_ENVIRONMENT = "development"
+LIVE_KIT_SERVER = "http://localhost:7880"
+LIVE_KIT_KEY = "devkey"
+LIVE_KIT_SECRET = "secret"
+
+# RUST_LOG=info
+# LOG_JSON=true

crates/collab2/collab/Cargo.toml

@@ -0,0 +1,97 @@
+[package]
+authors = ["Nathan Sobo <nathan@zed.dev>"]
+default-run = "collab"
+edition = "2021"
+name = "collab"
+version = "0.28.0"
+publish = false
+
+[[bin]]
+name = "collab"
+
+[[bin]]
+name = "seed"
+required-features = ["seed-support"]
+
+[dependencies]
+clock = { path = "../clock" }
+collections = { path = "../collections" }
+live_kit_server = { path = "../live_kit_server" }
+text = { path = "../text" }
+rpc = { path = "../rpc" }
+util = { path = "../util" }
+
+anyhow.workspace = true
+async-tungstenite = "0.16"
+axum = { version = "0.5", features = ["json", "headers", "ws"] }
+axum-extra = { version = "0.3", features = ["erased-json"] }
+base64 = "0.13"
+clap = { version = "3.1", features = ["derive"], optional = true }
+dashmap = "5.4"
+envy = "0.4.2"
+futures.workspace = true
+hyper = "0.14"
+lazy_static.workspace = true
+lipsum = { version = "0.8", optional = true }
+log.workspace = true
+nanoid = "0.4"
+parking_lot.workspace = true
+prometheus = "0.13"
+prost.workspace = true
+rand.workspace = true
+reqwest = { version = "0.11", features = ["json"], optional = true }
+scrypt = "0.7"
+smallvec.workspace = true
+sea-orm = { version = "0.12.x", features = ["sqlx-postgres", "postgres-array", "runtime-tokio-rustls", "with-uuid"] }
+serde.workspace = true
+serde_derive.workspace = true
+serde_json.workspace = true
+sha-1 = "0.9"
+sqlx = { version = "0.7", features = ["runtime-tokio-rustls", "postgres", "json", "time", "uuid", "any"] }
+time.workspace = true
+tokio = { version = "1", features = ["full"] }
+tokio-tungstenite = "0.17"
+tonic = "0.6"
+tower = "0.4"
+toml.workspace = true
+tracing = "0.1.34"
+tracing-log = "0.1.3"
+tracing-subscriber = { version = "0.3.11", features = ["env-filter", "json"] }
+uuid.workspace = true
+
+[dev-dependencies]
+audio = { path = "../audio" }
+collections = { path = "../collections", features = ["test-support"] }
+gpui = { path = "../gpui", features = ["test-support"] }
+call = { path = "../call", features = ["test-support"] }
+client = { path = "../client", features = ["test-support"] }
+channel = { path = "../channel" }
+editor = { path = "../editor", features = ["test-support"] }
+language = { path = "../language", features = ["test-support"] }
+fs = { path = "../fs", features = ["test-support"] }
+git = { path = "../git", features = ["test-support"] }
+live_kit_client = { path = "../live_kit_client", features = ["test-support"] }
+lsp = { path = "../lsp", features = ["test-support"] }
+node_runtime = { path = "../node_runtime" }
+notifications = { path = "../notifications", features = ["test-support"] }
+project = { path = "../project", features = ["test-support"] }
+rpc = { path = "../rpc", features = ["test-support"] }
+settings = { path = "../settings", features = ["test-support"] }
+theme = { path = "../theme" }
+workspace = { path = "../workspace", features = ["test-support"] }
+collab_ui = { path = "../collab_ui", features = ["test-support"] }
+
+async-trait.workspace = true
+pretty_assertions.workspace = true
+ctor.workspace = true
+env_logger.workspace = true
+indoc.workspace = true
+util = { path = "../util" }
+lazy_static.workspace = true
+sea-orm = { version = "0.12.x", features = ["sqlx-sqlite"] }
+serde_json.workspace = true
+sqlx = { version = "0.7", features = ["sqlite"] }
+unindent.workspace = true
+
+[features]
+seed-support = ["clap", "lipsum", "reqwest"]

crates/collab2/collab/README.md

@@ -0,0 +1,5 @@
+# Zed Server
+
+This crate is what we run at https://collab.zed.dev.
+
+It contains our back-end logic for collaboration, to which we connect from the Zed client via a websocket after authenticating via https://zed.dev, which is a separate repo running on Vercel.

crates/collab2/collab/admin_api.conf

@@ -0,0 +1,4 @@
+db-uri = "postgres://postgres@localhost/zed"
+server-port = 8081
+jwt-secret = "the-postgrest-jwt-secret-for-authorization"
+log-level = "info"

crates/collab2/collab/basic.conf

@@ -0,0 +1,12 @@
+
+[Interface]
+PrivateKey = B5Fp/yVfP0QYlb+YJv9ea+EMI1mWODPD3akh91cVjvc=
+Address = fdaa:0:2ce3:a7b:bea:0:a:2/120
+DNS = fdaa:0:2ce3::3
+
+[Peer]
+PublicKey = RKAYPljEJiuaELNDdQIEJmQienT9+LRISfIHwH45HAw=
+AllowedIPs = fdaa:0:2ce3::/48
+Endpoint = ord1.gateway.6pn.dev:51820
+PersistentKeepalive = 15
+

crates/collab2/collab/k8s/environments/preview.sh

@@ -0,0 +1,4 @@
+ZED_ENVIRONMENT=preview
+RUST_LOG=info
+INVITE_LINK_PREFIX=https://zed.dev/invites/
+DATABASE_MAX_CONNECTIONS=10

crates/collab2/collab/k8s/environments/production.sh

@@ -0,0 +1,4 @@
+ZED_ENVIRONMENT=production
+RUST_LOG=info
+INVITE_LINK_PREFIX=https://zed.dev/invites/
+DATABASE_MAX_CONNECTIONS=85

crates/collab2/collab/k8s/environments/staging.sh

@@ -0,0 +1,4 @@
+ZED_ENVIRONMENT=staging
+RUST_LOG=info
+INVITE_LINK_PREFIX=https://staging.zed.dev/invites/
+DATABASE_MAX_CONNECTIONS=5

crates/collab2/collab/k8s/manifest.template.yml

@@ -0,0 +1,177 @@
+---
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: ${ZED_KUBE_NAMESPACE}
+
+---
+kind: Service
+apiVersion: v1
+metadata:
+  namespace: ${ZED_KUBE_NAMESPACE}
+  name: collab
+  annotations:
+    service.beta.kubernetes.io/do-loadbalancer-tls-ports: "443"
+    service.beta.kubernetes.io/do-loadbalancer-certificate-id: ${ZED_DO_CERTIFICATE_ID}
+spec:
+  type: LoadBalancer
+  selector:
+    app: collab
+  ports:
+    - name: web
+      protocol: TCP
+      port: 443
+      targetPort: 8080
+
+---
+kind: Service
+apiVersion: v1
+metadata:
+  namespace: ${ZED_KUBE_NAMESPACE}
+  name: pgadmin
+  annotations:
+    service.beta.kubernetes.io/do-loadbalancer-tls-ports: "443"
+    service.beta.kubernetes.io/do-loadbalancer-certificate-id: ${ZED_DO_CERTIFICATE_ID}
+spec:
+  type: LoadBalancer
+  selector:
+    app: postgrest
+  ports:
+    - name: web
+      protocol: TCP
+      port: 443
+      targetPort: 8080
+
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  namespace: ${ZED_KUBE_NAMESPACE}
+  name: collab
+
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: collab
+  template:
+    metadata:
+      labels:
+        app: collab
+      annotations:
+        ad.datadoghq.com/collab.check_names: |
+          ["openmetrics"]
+        ad.datadoghq.com/collab.init_configs: |
+          [{}]
+        ad.datadoghq.com/collab.instances: |
+          [
+              {
+              "openmetrics_endpoint": "http://%%host%%:%%port%%/metrics",
+              "namespace": "collab_${ZED_KUBE_NAMESPACE}",
+              "metrics": [".*"]
+              }
+          ]
+    spec:
+      containers:
+        - name: collab
+          image: "${ZED_IMAGE_ID}"
+          args:
+            - serve
+          ports:
+            - containerPort: 8080
+              protocol: TCP
+          livenessProbe:
+            httpGet:
+              path: /healthz
+              port: 8080
+            initialDelaySeconds: 5
+            periodSeconds: 5
+            timeoutSeconds: 5
+          readinessProbe:
+            httpGet:
+              path: /
+              port: 8080
+            initialDelaySeconds: 1
+            periodSeconds: 1
+          env:
+            - name: HTTP_PORT
+              value: "8080"
+            - name: DATABASE_URL
+              valueFrom:
+                secretKeyRef:
+                  name: database
+                  key: url
+            - name: DATABASE_MAX_CONNECTIONS
+              value: "${DATABASE_MAX_CONNECTIONS}"
+            - name: API_TOKEN
+              valueFrom:
+                secretKeyRef:
+                  name: api
+                  key: token
+            - name: LIVE_KIT_SERVER
+              valueFrom:
+                secretKeyRef:
+                  name: livekit
+                  key: server
+            - name: LIVE_KIT_KEY
+              valueFrom:
+                secretKeyRef:
+                  name: livekit
+                  key: key
+            - name: LIVE_KIT_SECRET
+              valueFrom:
+                secretKeyRef:
+                  name: livekit
+                  key: secret
+            - name: INVITE_LINK_PREFIX
+              value: ${INVITE_LINK_PREFIX}
+            - name: RUST_BACKTRACE
+              value: "1"
+            - name: RUST_LOG
+              value: ${RUST_LOG}
+            - name: LOG_JSON
+              value: "true"
+            - name: ZED_ENVIRONMENT
+              value: ${ZED_ENVIRONMENT}
+          securityContext:
+            capabilities:
+              # FIXME - Switch to the more restrictive `PERFMON` capability.
+              # This capability isn't yet available in a stable version of Debian.
+              add: ["SYS_ADMIN"]
+
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  namespace: ${ZED_KUBE_NAMESPACE}
+  name: postgrest
+
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: postgrest
+  template:
+    metadata:
+      labels:
+        app: postgrest
+    spec:
+      containers:
+        - name: postgrest
+          image: "postgrest/postgrest"
+          ports:
+            - containerPort: 8080
+              protocol: TCP
+          env:
+            - name: PGRST_SERVER_PORT
+              value: "8080"
+            - name: PGRST_DB_URI
+              valueFrom:
+                secretKeyRef:
+                  name: database
+                  key: url
+            - name: PGRST_JWT_SECRET
+              valueFrom:
+                secretKeyRef:
+                  name: postgrest
+                  key: jwt_secret

crates/collab2/collab/k8s/migrate.template.yml

@@ -0,0 +1,21 @@
+apiVersion: batch/v1
+kind: Job
+metadata:
+  namespace: ${ZED_KUBE_NAMESPACE}
+  name: ${ZED_MIGRATE_JOB_NAME}
+spec:
+  template:
+    spec:
+      restartPolicy: Never
+      containers:
+        - name: migrator
+          imagePullPolicy: Always
+          image: ${ZED_IMAGE_ID}
+          args:
+            - migrate
+          env:
+            - name: DATABASE_URL
+              valueFrom:
+                secretKeyRef:
+                  name: database
+                  key: url

crates/collab2/collab/migrations.sqlite/20221109000000_test_schema.sql

@@ -0,0 +1,344 @@
+CREATE TABLE "users" (
+    "id" INTEGER PRIMARY KEY AUTOINCREMENT,
+    "github_login" VARCHAR,
+    "admin" BOOLEAN,
+    "email_address" VARCHAR(255) DEFAULT NULL,
+    "invite_code" VARCHAR(64),
+    "invite_count" INTEGER NOT NULL DEFAULT 0,
+    "inviter_id" INTEGER REFERENCES users (id),
+    "connected_once" BOOLEAN NOT NULL DEFAULT false,
+    "created_at" TIMESTAMP NOT NULL DEFAULT now,
+    "metrics_id" TEXT,
+    "github_user_id" INTEGER
+);
+CREATE UNIQUE INDEX "index_users_github_login" ON "users" ("github_login");
+CREATE UNIQUE INDEX "index_invite_code_users" ON "users" ("invite_code");
+CREATE INDEX "index_users_on_email_address" ON "users" ("email_address");
+CREATE INDEX "index_users_on_github_user_id" ON "users" ("github_user_id");
+
+CREATE TABLE "access_tokens" (
+    "id" INTEGER PRIMARY KEY AUTOINCREMENT,
+    "user_id" INTEGER REFERENCES users (id),
+    "hash" VARCHAR(128)
+);
+CREATE INDEX "index_access_tokens_user_id" ON "access_tokens" ("user_id");
+
+CREATE TABLE "contacts" (
+    "id" INTEGER PRIMARY KEY AUTOINCREMENT,
+    "user_id_a" INTEGER REFERENCES users (id) NOT NULL,
+    "user_id_b" INTEGER REFERENCES users (id) NOT NULL,
+    "a_to_b" BOOLEAN NOT NULL,
+    "should_notify" BOOLEAN NOT NULL,
+    "accepted" BOOLEAN NOT NULL
+);
+CREATE UNIQUE INDEX "index_contacts_user_ids" ON "contacts" ("user_id_a", "user_id_b");
+CREATE INDEX "index_contacts_user_id_b" ON "contacts" ("user_id_b");
+
+CREATE TABLE "rooms" (
+    "id" INTEGER PRIMARY KEY AUTOINCREMENT,
+    "live_kit_room" VARCHAR NOT NULL,
+    "enviroment" VARCHAR,
+    "channel_id" INTEGER REFERENCES channels (id) ON DELETE CASCADE
+);
+CREATE UNIQUE INDEX "index_rooms_on_channel_id" ON "rooms" ("channel_id");
+
+CREATE TABLE "projects" (
+    "id" INTEGER PRIMARY KEY AUTOINCREMENT,
+    "room_id" INTEGER REFERENCES rooms (id) ON DELETE CASCADE NOT NULL,
+    "host_user_id" INTEGER REFERENCES users (id) NOT NULL,
+    "host_connection_id" INTEGER,
+    "host_connection_server_id" INTEGER REFERENCES servers (id) ON DELETE CASCADE,
+    "unregistered" BOOLEAN NOT NULL DEFAULT FALSE
+);
+CREATE INDEX "index_projects_on_host_connection_server_id" ON "projects" ("host_connection_server_id");
+CREATE INDEX "index_projects_on_host_connection_id_and_host_connection_server_id" ON "projects" ("host_connection_id", "host_connection_server_id");
+
+CREATE TABLE "worktrees" (
+    "project_id" INTEGER NOT NULL REFERENCES projects (id) ON DELETE CASCADE,
+    "id" INTEGER NOT NULL,
+    "root_name" VARCHAR NOT NULL,
+    "abs_path" VARCHAR NOT NULL,
+    "visible" BOOL NOT NULL,
+    "scan_id" INTEGER NOT NULL,
+    "is_complete" BOOL NOT NULL DEFAULT FALSE,
+    "completed_scan_id" INTEGER NOT NULL,
+    PRIMARY KEY(project_id, id)
+);
+CREATE INDEX "index_worktrees_on_project_id" ON "worktrees" ("project_id");
+
+CREATE TABLE "worktree_entries" (
+    "project_id" INTEGER NOT NULL,
+    "worktree_id" INTEGER NOT NULL,
+    "scan_id" INTEGER NOT NULL,
+    "id" INTEGER NOT NULL,
+    "is_dir" BOOL NOT NULL,
+    "path" VARCHAR NOT NULL,
+    "inode" INTEGER NOT NULL,
+    "mtime_seconds" INTEGER NOT NULL,
+    "mtime_nanos" INTEGER NOT NULL,
+    "is_symlink" BOOL NOT NULL,
+    "is_external" BOOL NOT NULL,
+    "is_ignored" BOOL NOT NULL,
+    "is_deleted" BOOL NOT NULL,
+    "git_status" INTEGER,
+    PRIMARY KEY(project_id, worktree_id, id),
+    FOREIGN KEY(project_id, worktree_id) REFERENCES worktrees (project_id, id) ON DELETE CASCADE
+);
+CREATE INDEX "index_worktree_entries_on_project_id" ON "worktree_entries" ("project_id");
+CREATE INDEX "index_worktree_entries_on_project_id_and_worktree_id" ON "worktree_entries" ("project_id", "worktree_id");
+
+CREATE TABLE "worktree_repositories" (
+    "project_id" INTEGER NOT NULL,
+    "worktree_id" INTEGER NOT NULL,
+    "work_directory_id" INTEGER NOT NULL,
+    "branch" VARCHAR,
+    "scan_id" INTEGER NOT NULL,
+    "is_deleted" BOOL NOT NULL,
+    PRIMARY KEY(project_id, worktree_id, work_directory_id),
+    FOREIGN KEY(project_id, worktree_id) REFERENCES worktrees (project_id, id) ON DELETE CASCADE,
+    FOREIGN KEY(project_id, worktree_id, work_directory_id) REFERENCES worktree_entries (project_id, worktree_id, id) ON DELETE CASCADE
+);
+CREATE INDEX "index_worktree_repositories_on_project_id" ON "worktree_repositories" ("project_id");
+CREATE INDEX "index_worktree_repositories_on_project_id_and_worktree_id" ON "worktree_repositories" ("project_id", "worktree_id");
+
+CREATE TABLE "worktree_settings_files" (
+    "project_id" INTEGER NOT NULL,
+    "worktree_id" INTEGER NOT NULL,
+    "path" VARCHAR NOT NULL,
+    "content" TEXT,
+    PRIMARY KEY(project_id, worktree_id, path),
+    FOREIGN KEY(project_id, worktree_id) REFERENCES worktrees (project_id, id) ON DELETE CASCADE
+);
+CREATE INDEX "index_worktree_settings_files_on_project_id" ON "worktree_settings_files" ("project_id");
+CREATE INDEX "index_worktree_settings_files_on_project_id_and_worktree_id" ON "worktree_settings_files" ("project_id", "worktree_id");
+
+CREATE TABLE "worktree_diagnostic_summaries" (
+    "project_id" INTEGER NOT NULL,
+    "worktree_id" INTEGER NOT NULL,
+    "path" VARCHAR NOT NULL,
+    "language_server_id" INTEGER NOT NULL,
+    "error_count" INTEGER NOT NULL,
+    "warning_count" INTEGER NOT NULL,
+    PRIMARY KEY(project_id, worktree_id, path),
+    FOREIGN KEY(project_id, worktree_id) REFERENCES worktrees (project_id, id) ON DELETE CASCADE
+);
+CREATE INDEX "index_worktree_diagnostic_summaries_on_project_id" ON "worktree_diagnostic_summaries" ("project_id");
+CREATE INDEX "index_worktree_diagnostic_summaries_on_project_id_and_worktree_id" ON "worktree_diagnostic_summaries" ("project_id", "worktree_id");
+
+CREATE TABLE "language_servers" (
+    "id" INTEGER NOT NULL,
+    "project_id" INTEGER NOT NULL REFERENCES projects (id) ON DELETE CASCADE,
+    "name" VARCHAR NOT NULL,
+    PRIMARY KEY(project_id, id)
+);
+CREATE INDEX "index_language_servers_on_project_id" ON "language_servers" ("project_id");
+
+CREATE TABLE "project_collaborators" (
+    "id" INTEGER PRIMARY KEY AUTOINCREMENT,
+    "project_id" INTEGER NOT NULL REFERENCES projects (id) ON DELETE CASCADE,
+    "connection_id" INTEGER NOT NULL,
+    "connection_server_id" INTEGER NOT NULL REFERENCES servers (id) ON DELETE CASCADE,
+    "user_id" INTEGER NOT NULL,
+    "replica_id" INTEGER NOT NULL,
+    "is_host" BOOLEAN NOT NULL
+);
+CREATE INDEX "index_project_collaborators_on_project_id" ON "project_collaborators" ("project_id");
+CREATE UNIQUE INDEX "index_project_collaborators_on_project_id_and_replica_id" ON "project_collaborators" ("project_id", "replica_id");
+CREATE INDEX "index_project_collaborators_on_connection_server_id" ON "project_collaborators" ("connection_server_id");
+CREATE INDEX "index_project_collaborators_on_connection_id" ON "project_collaborators" ("connection_id");
+CREATE UNIQUE INDEX "index_project_collaborators_on_project_id_connection_id_and_server_id" ON "project_collaborators" ("project_id", "connection_id", "connection_server_id");
+
+CREATE TABLE "room_participants" (
+    "id" INTEGER PRIMARY KEY AUTOINCREMENT,
+    "room_id" INTEGER NOT NULL REFERENCES rooms (id),
+    "user_id" INTEGER NOT NULL REFERENCES users (id),
+    "answering_connection_id" INTEGER,
+    "answering_connection_server_id" INTEGER REFERENCES servers (id) ON DELETE CASCADE,
+    "answering_connection_lost" BOOLEAN NOT NULL,
+    "location_kind" INTEGER,
+    "location_project_id" INTEGER,
+    "initial_project_id" INTEGER,
+    "calling_user_id" INTEGER NOT NULL REFERENCES users (id),
+    "calling_connection_id" INTEGER NOT NULL,
+    "calling_connection_server_id" INTEGER REFERENCES servers (id) ON DELETE SET NULL,
+    "participant_index" INTEGER
+);
+CREATE UNIQUE INDEX "index_room_participants_on_user_id" ON "room_participants" ("user_id");
+CREATE INDEX "index_room_participants_on_room_id" ON "room_participants" ("room_id");
+CREATE INDEX "index_room_participants_on_answering_connection_server_id" ON "room_participants" ("answering_connection_server_id");
+CREATE INDEX "index_room_participants_on_calling_connection_server_id" ON "room_participants" ("calling_connection_server_id");
+CREATE INDEX "index_room_participants_on_answering_connection_id" ON "room_participants" ("answering_connection_id");
+CREATE UNIQUE INDEX "index_room_participants_on_answering_connection_id_and_answering_connection_server_id" ON "room_participants" ("answering_connection_id", "answering_connection_server_id");
+
+CREATE TABLE "servers" (
+    "id" INTEGER PRIMARY KEY AUTOINCREMENT,
+    "environment" VARCHAR NOT NULL
+);
+
+CREATE TABLE "followers" (
+    "id" INTEGER PRIMARY KEY AUTOINCREMENT,
+    "room_id" INTEGER NOT NULL REFERENCES rooms (id) ON DELETE CASCADE,
+    "project_id" INTEGER NOT NULL REFERENCES projects (id) ON DELETE CASCADE,
+    "leader_connection_server_id" INTEGER NOT NULL REFERENCES servers (id) ON DELETE CASCADE,
+    "leader_connection_id" INTEGER NOT NULL,
+    "follower_connection_server_id" INTEGER NOT NULL REFERENCES servers (id) ON DELETE CASCADE,
+    "follower_connection_id" INTEGER NOT NULL
+);
+CREATE UNIQUE INDEX
+    "index_followers_on_project_id_and_leader_connection_server_id_and_leader_connection_id_and_follower_connection_server_id_and_follower_connection_id"
+ON "followers" ("project_id", "leader_connection_server_id", "leader_connection_id", "follower_connection_server_id", "follower_connection_id");
+CREATE INDEX "index_followers_on_room_id" ON "followers" ("room_id");
+
+CREATE TABLE "channels" (
+    "id" INTEGER PRIMARY KEY AUTOINCREMENT,
+    "name" VARCHAR NOT NULL,
+    "created_at" TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "visibility" VARCHAR NOT NULL,
+    "parent_path" TEXT
+);
+
+CREATE INDEX "index_channels_on_parent_path" ON "channels" ("parent_path");
+
+CREATE TABLE IF NOT EXISTS "channel_chat_participants" (
+    "id" INTEGER PRIMARY KEY AUTOINCREMENT,
+    "user_id" INTEGER NOT NULL REFERENCES users (id),
+    "channel_id" INTEGER NOT NULL REFERENCES channels (id) ON DELETE CASCADE,
+    "connection_id" INTEGER NOT NULL,
+    "connection_server_id" INTEGER NOT NULL REFERENCES servers (id) ON DELETE CASCADE
+);
+CREATE INDEX "index_channel_chat_participants_on_channel_id" ON "channel_chat_participants" ("channel_id");
+
+CREATE TABLE IF NOT EXISTS "channel_messages" (
+    "id" INTEGER PRIMARY KEY AUTOINCREMENT,
+    "channel_id" INTEGER NOT NULL REFERENCES channels (id) ON DELETE CASCADE,
+    "sender_id" INTEGER NOT NULL REFERENCES users (id),
+    "body" TEXT NOT NULL,
+    "sent_at" TIMESTAMP,
+    "nonce" BLOB NOT NULL
+);
+CREATE INDEX "index_channel_messages_on_channel_id" ON "channel_messages" ("channel_id");
+CREATE UNIQUE INDEX "index_channel_messages_on_sender_id_nonce" ON "channel_messages" ("sender_id", "nonce");
+
+CREATE TABLE "channel_message_mentions" (
+    "message_id" INTEGER NOT NULL REFERENCES channel_messages (id) ON DELETE CASCADE,
+    "start_offset" INTEGER NOT NULL,
+    "end_offset" INTEGER NOT NULL,
+    "user_id" INTEGER NOT NULL REFERENCES users (id) ON DELETE CASCADE,
+    PRIMARY KEY(message_id, start_offset)
+);
+
+CREATE TABLE "channel_members" (
+    "id" INTEGER PRIMARY KEY AUTOINCREMENT,
+    "channel_id" INTEGER NOT NULL REFERENCES channels (id) ON DELETE CASCADE,
+    "user_id" INTEGER NOT NULL REFERENCES users (id) ON DELETE CASCADE,
+    "admin" BOOLEAN NOT NULL DEFAULT false,
+    "role" VARCHAR,
+    "accepted" BOOLEAN NOT NULL DEFAULT false,
+    "updated_at" TIMESTAMP NOT NULL DEFAULT now
+);
+
+CREATE UNIQUE INDEX "index_channel_members_on_channel_id_and_user_id" ON "channel_members" ("channel_id", "user_id");
+
+CREATE TABLE "buffers" (
+    "id" INTEGER PRIMARY KEY AUTOINCREMENT,
+    "channel_id" INTEGER NOT NULL REFERENCES channels (id) ON DELETE CASCADE,
+    "epoch" INTEGER NOT NULL DEFAULT 0
+);
+
+CREATE INDEX "index_buffers_on_channel_id" ON "buffers" ("channel_id");
+
+CREATE TABLE "buffer_operations" (
+    "buffer_id" INTEGER NOT NULL REFERENCES buffers (id) ON DELETE CASCADE,
+    "epoch" INTEGER NOT NULL,
+    "replica_id" INTEGER NOT NULL,
+    "lamport_timestamp" INTEGER NOT NULL,
+    "value" BLOB NOT NULL,
+    PRIMARY KEY(buffer_id, epoch, lamport_timestamp, replica_id)
+);
+
+CREATE TABLE "buffer_snapshots" (
+    "buffer_id" INTEGER NOT NULL REFERENCES buffers (id) ON DELETE CASCADE,
+    "epoch" INTEGER NOT NULL,
+    "text" TEXT NOT NULL,
+    "operation_serialization_version" INTEGER NOT NULL,
+    PRIMARY KEY(buffer_id, epoch)
+);
+
+CREATE TABLE "channel_buffer_collaborators" (
+    "id" INTEGER PRIMARY KEY AUTOINCREMENT,
+    "channel_id" INTEGER NOT NULL REFERENCES channels (id) ON DELETE CASCADE,
+    "connection_id" INTEGER NOT NULL,
+    "connection_server_id" INTEGER NOT NULL REFERENCES servers (id) ON DELETE CASCADE,
+    "connection_lost" BOOLEAN NOT NULL DEFAULT false,
+    "user_id" INTEGER NOT NULL REFERENCES users (id) ON DELETE CASCADE,
+    "replica_id" INTEGER NOT NULL
+);
+
+CREATE INDEX "index_channel_buffer_collaborators_on_channel_id" ON "channel_buffer_collaborators" ("channel_id");
+CREATE UNIQUE INDEX "index_channel_buffer_collaborators_on_channel_id_and_replica_id" ON "channel_buffer_collaborators" ("channel_id", "replica_id");
+CREATE INDEX "index_channel_buffer_collaborators_on_connection_server_id" ON "channel_buffer_collaborators" ("connection_server_id");
+CREATE INDEX "index_channel_buffer_collaborators_on_connection_id" ON "channel_buffer_collaborators" ("connection_id");
+CREATE UNIQUE INDEX "index_channel_buffer_collaborators_on_channel_id_connection_id_and_server_id" ON "channel_buffer_collaborators" ("channel_id", "connection_id", "connection_server_id");
+
+
+CREATE TABLE "feature_flags" (
+    "id" INTEGER PRIMARY KEY AUTOINCREMENT,
+    "flag" TEXT NOT NULL UNIQUE
+);
+
+CREATE INDEX "index_feature_flags" ON "feature_flags" ("id");
+
+
+CREATE TABLE "user_features" (
+    "user_id" INTEGER NOT NULL REFERENCES users (id) ON DELETE CASCADE,
+    "feature_id" INTEGER NOT NULL REFERENCES feature_flags (id) ON DELETE CASCADE,
+    PRIMARY KEY (user_id, feature_id)
+);
+
+CREATE UNIQUE INDEX "index_user_features_user_id_and_feature_id" ON "user_features" ("user_id", "feature_id");
+CREATE INDEX "index_user_features_on_user_id" ON "user_features" ("user_id");
+CREATE INDEX "index_user_features_on_feature_id" ON "user_features" ("feature_id");
+
+
+CREATE TABLE "observed_buffer_edits" (
+    "user_id" INTEGER NOT NULL REFERENCES users (id) ON DELETE CASCADE,
+    "buffer_id" INTEGER NOT NULL REFERENCES buffers (id) ON DELETE CASCADE,
+    "epoch" INTEGER NOT NULL,
+    "lamport_timestamp" INTEGER NOT NULL,
+    "replica_id" INTEGER NOT NULL,
+    PRIMARY KEY (user_id, buffer_id)
+);
+
+CREATE UNIQUE INDEX "index_observed_buffers_user_and_buffer_id" ON "observed_buffer_edits" ("user_id", "buffer_id");
+
+CREATE TABLE IF NOT EXISTS "observed_channel_messages" (
+    "user_id" INTEGER NOT NULL REFERENCES users (id) ON DELETE CASCADE,
+    "channel_id" INTEGER NOT NULL REFERENCES channels (id) ON DELETE CASCADE,
+    "channel_message_id" INTEGER NOT NULL,
+    PRIMARY KEY (user_id, channel_id)
+);
+
+CREATE UNIQUE INDEX "index_observed_channel_messages_user_and_channel_id" ON "observed_channel_messages" ("user_id", "channel_id");
+
+CREATE TABLE "notification_kinds" (
+    "id" INTEGER PRIMARY KEY AUTOINCREMENT,
+    "name" VARCHAR NOT NULL
+);
+
+CREATE UNIQUE INDEX "index_notification_kinds_on_name" ON "notification_kinds" ("name");
+
+CREATE TABLE "notifications" (
+    "id" INTEGER PRIMARY KEY AUTOINCREMENT,
+    "created_at" TIMESTAMP NOT NULL default CURRENT_TIMESTAMP,
+    "recipient_id" INTEGER NOT NULL REFERENCES users (id) ON DELETE CASCADE,
+    "kind" INTEGER NOT NULL REFERENCES notification_kinds (id),
+    "entity_id" INTEGER,
+    "content" TEXT,
+    "is_read" BOOLEAN NOT NULL DEFAULT FALSE,
+    "response" BOOLEAN
+);
+
+CREATE INDEX
+    "index_notifications_on_recipient_id_is_read_kind_entity_id"
+    ON "notifications"
+    ("recipient_id", "is_read", "kind", "entity_id");

crates/collab2/collab/migrations/20210527024318_initial_schema.sql

@@ -0,0 +1,20 @@
+CREATE TABLE IF NOT EXISTS "sessions" (
+    "id" VARCHAR NOT NULL PRIMARY KEY,
+    "expires" TIMESTAMP WITH TIME ZONE NULL,
+    "session" TEXT NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS "users" (
+    "id" SERIAL PRIMARY KEY,
+    "github_login" VARCHAR,
+    "admin" BOOLEAN
+);
+
+CREATE UNIQUE INDEX "index_users_github_login" ON "users" ("github_login");
+
+CREATE TABLE IF NOT EXISTS "signups" (
+    "id" SERIAL PRIMARY KEY,
+    "github_login" VARCHAR,
+    "email_address" VARCHAR,
+    "about" TEXT
+);

crates/collab2/collab/migrations/20210607190313_create_access_tokens.sql

@@ -0,0 +1,7 @@
+CREATE TABLE IF NOT EXISTS "access_tokens" (
+    "id" SERIAL PRIMARY KEY,
+    "user_id" INTEGER REFERENCES users (id),
+    "hash" VARCHAR(128)
+);
+
+CREATE INDEX "index_access_tokens_user_id" ON "access_tokens" ("user_id");

crates/collab2/collab/migrations/20210805175147_create_chat_tables.sql

@@ -0,0 +1,46 @@
+CREATE TABLE IF NOT EXISTS "orgs" (
+    "id" SERIAL PRIMARY KEY,
+    "name" VARCHAR NOT NULL,
+    "slug" VARCHAR NOT NULL
+);
+
+CREATE UNIQUE INDEX "index_orgs_slug" ON "orgs" ("slug");
+
+CREATE TABLE IF NOT EXISTS "org_memberships" (
+    "id" SERIAL PRIMARY KEY,
+    "org_id" INTEGER REFERENCES orgs (id) NOT NULL,
+    "user_id" INTEGER REFERENCES users (id) NOT NULL,
+    "admin" BOOLEAN NOT NULL
+);
+
+CREATE INDEX "index_org_memberships_user_id" ON "org_memberships" ("user_id");
+CREATE UNIQUE INDEX "index_org_memberships_org_id_and_user_id" ON "org_memberships" ("org_id", "user_id");
+
+CREATE TABLE IF NOT EXISTS "channels" (
+    "id" SERIAL PRIMARY KEY,
+    "owner_id" INTEGER NOT NULL,
+    "owner_is_user" BOOLEAN NOT NULL,
+    "name" VARCHAR NOT NULL
+);
+
+CREATE UNIQUE INDEX "index_channels_owner_and_name" ON "channels" ("owner_is_user", "owner_id", "name");
+
+CREATE TABLE IF NOT EXISTS "channel_memberships" (
+    "id" SERIAL PRIMARY KEY,
+    "channel_id" INTEGER REFERENCES channels (id) NOT NULL,
+    "user_id" INTEGER REFERENCES users (id) NOT NULL,
+    "admin" BOOLEAN NOT NULL
+);
+
+CREATE INDEX "index_channel_memberships_user_id" ON "channel_memberships" ("user_id");
+CREATE UNIQUE INDEX "index_channel_memberships_channel_id_and_user_id" ON "channel_memberships" ("channel_id", "user_id");
+
+CREATE TABLE IF NOT EXISTS "channel_messages" (
+    "id" SERIAL PRIMARY KEY,
+    "channel_id" INTEGER REFERENCES channels (id) NOT NULL,
+    "sender_id" INTEGER REFERENCES users (id) NOT NULL,
+    "body" TEXT NOT NULL,
+    "sent_at" TIMESTAMP
+);
+
+CREATE INDEX "index_channel_messages_channel_id" ON "channel_messages" ("channel_id");

crates/collab2/collab/migrations/20210916123647_add_nonce_to_channel_messages.sql

@@ -0,0 +1,4 @@
+ALTER TABLE "channel_messages"
+ADD "nonce" UUID NOT NULL DEFAULT gen_random_uuid();
+
+CREATE UNIQUE INDEX "index_channel_messages_nonce" ON "channel_messages" ("nonce");

crates/collab2/collab/migrations/20210920192001_add_interests_to_signups.sql

@@ -0,0 +1,4 @@
+ALTER TABLE "signups"
+  ADD "wants_releases" BOOLEAN,
+  ADD "wants_updates" BOOLEAN,
+  ADD "wants_community" BOOLEAN;

crates/collab2/collab/migrations/20220421165757_drop_signups.sql

@@ -0,0 +1 @@
+DROP TABLE IF EXISTS "signups";

crates/collab2/collab/migrations/20220505144506_add_trigram_index_to_users.sql

@@ -0,0 +1,2 @@
+CREATE EXTENSION IF NOT EXISTS pg_trgm;
+CREATE INDEX trigram_index_users_on_github_login ON users USING GIN(github_login gin_trgm_ops);

crates/collab2/collab/migrations/20220506130724_create_contacts.sql

@@ -0,0 +1,11 @@
+CREATE TABLE IF NOT EXISTS "contacts" (
+    "id" SERIAL PRIMARY KEY,
+    "user_id_a" INTEGER REFERENCES users (id) NOT NULL,
+    "user_id_b" INTEGER REFERENCES users (id) NOT NULL,
+    "a_to_b" BOOLEAN NOT NULL,
+    "should_notify" BOOLEAN NOT NULL,
+    "accepted" BOOLEAN NOT NULL
+);
+
+CREATE UNIQUE INDEX "index_contacts_user_ids" ON "contacts" ("user_id_a", "user_id_b");
+CREATE INDEX "index_contacts_user_id_b" ON "contacts" ("user_id_b");

crates/collab2/collab/migrations/20220518151305_add_invites_to_users.sql

@@ -0,0 +1,9 @@
+ALTER TABLE users
+ADD email_address VARCHAR(255) DEFAULT NULL,
+ADD invite_code VARCHAR(64),
+ADD invite_count INTEGER NOT NULL DEFAULT 0,
+ADD inviter_id INTEGER REFERENCES users (id),
+ADD connected_once BOOLEAN NOT NULL DEFAULT false,
+ADD created_at TIMESTAMP NOT NULL DEFAULT NOW();
+
+CREATE UNIQUE INDEX "index_invite_code_users" ON "users" ("invite_code");

crates/collab2/collab/migrations/20220523232954_allow_user_deletes.sql

@@ -0,0 +1,6 @@
+ALTER TABLE contacts DROP CONSTRAINT contacts_user_id_a_fkey;
+ALTER TABLE contacts DROP CONSTRAINT contacts_user_id_b_fkey;
+ALTER TABLE contacts ADD CONSTRAINT contacts_user_id_a_fkey FOREIGN KEY (user_id_a) REFERENCES users(id) ON DELETE CASCADE;
+ALTER TABLE contacts ADD CONSTRAINT contacts_user_id_b_fkey FOREIGN KEY (user_id_b) REFERENCES users(id) ON DELETE CASCADE;
+ALTER TABLE users DROP CONSTRAINT users_inviter_id_fkey;
+ALTER TABLE users ADD CONSTRAINT users_inviter_id_fkey FOREIGN KEY (inviter_id) REFERENCES users(id) ON DELETE SET NULL;

crates/collab2/collab/migrations/20220620211403_create_projects.sql

@@ -0,0 +1,24 @@
+CREATE TABLE IF NOT EXISTS "projects" (
+    "id" SERIAL PRIMARY KEY,
+    "host_user_id" INTEGER REFERENCES users (id) NOT NULL,
+    "unregistered" BOOLEAN NOT NULL DEFAULT false
+);
+
+CREATE TABLE IF NOT EXISTS "worktree_extensions" (
+    "id" SERIAL PRIMARY KEY,
+    "project_id" INTEGER REFERENCES projects (id) NOT NULL,
+    "worktree_id" INTEGER NOT NULL,
+    "extension" VARCHAR(255),
+    "count" INTEGER NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS "project_activity_periods" (
+    "id" SERIAL PRIMARY KEY,
+    "duration_millis" INTEGER NOT NULL,
+    "ended_at" TIMESTAMP NOT NULL,
+    "user_id" INTEGER REFERENCES users (id) NOT NULL,
+    "project_id" INTEGER REFERENCES projects (id) NOT NULL
+);
+
+CREATE INDEX "index_project_activity_periods_on_ended_at" ON "project_activity_periods" ("ended_at");
+CREATE UNIQUE INDEX "index_worktree_extensions_on_project_id_and_worktree_id_and_extension" ON "worktree_extensions" ("project_id", "worktree_id", "extension");

crates/collab2/collab/migrations/20220913211150_create_signups.sql

@@ -0,0 +1,27 @@
+CREATE TABLE IF NOT EXISTS "signups" (
+    "id" SERIAL PRIMARY KEY,
+    "email_address" VARCHAR NOT NULL,
+    "email_confirmation_code" VARCHAR(64) NOT NULL,
+    "email_confirmation_sent" BOOLEAN NOT NULL,
+    "created_at" TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "device_id" VARCHAR,
+    "user_id" INTEGER REFERENCES users (id) ON DELETE CASCADE,
+    "inviting_user_id" INTEGER REFERENCES users (id) ON DELETE SET NULL,
+
+    "platform_mac" BOOLEAN NOT NULL,
+    "platform_linux" BOOLEAN NOT NULL,
+    "platform_windows" BOOLEAN NOT NULL,
+    "platform_unknown" BOOLEAN NOT NULL,
+
+    "editor_features" VARCHAR[],
+    "programming_languages" VARCHAR[]
+);
+
+CREATE UNIQUE INDEX "index_signups_on_email_address" ON "signups" ("email_address");
+CREATE INDEX "index_signups_on_email_confirmation_sent" ON "signups" ("email_confirmation_sent");
+
+ALTER TABLE "users"
+    ADD "github_user_id" INTEGER;
+
+CREATE INDEX "index_users_on_email_address" ON "users" ("email_address");
+CREATE INDEX "index_users_on_github_user_id" ON "users" ("github_user_id");

crates/collab2/collab/migrations/20220929182110_add_metrics_id.sql

@@ -0,0 +1,2 @@
+ALTER TABLE "users"
+    ADD "metrics_id" uuid NOT NULL DEFAULT gen_random_uuid();

crates/collab2/collab/migrations/20221111092550_reconnection_support.sql

@@ -0,0 +1,90 @@
+CREATE TABLE IF NOT EXISTS "rooms" (
+    "id" SERIAL PRIMARY KEY,
+    "live_kit_room" VARCHAR NOT NULL
+);
+
+ALTER TABLE "projects"
+    ADD "room_id" INTEGER REFERENCES rooms (id),
+    ADD "host_connection_id" INTEGER,
+    ADD "host_connection_epoch" UUID;
+CREATE INDEX "index_projects_on_host_connection_epoch" ON "projects" ("host_connection_epoch");
+
+CREATE TABLE "worktrees" (
+    "project_id" INTEGER NOT NULL REFERENCES projects (id) ON DELETE CASCADE,
+    "id" INT8 NOT NULL,
+    "root_name" VARCHAR NOT NULL,
+    "abs_path" VARCHAR NOT NULL,
+    "visible" BOOL NOT NULL,
+    "scan_id" INT8 NOT NULL,
+    "is_complete" BOOL NOT NULL,
+    PRIMARY KEY(project_id, id)
+);
+CREATE INDEX "index_worktrees_on_project_id" ON "worktrees" ("project_id");
+
+CREATE TABLE "worktree_entries" (
+    "project_id" INTEGER NOT NULL,
+    "worktree_id" INT8 NOT NULL,
+    "id" INT8 NOT NULL,
+    "is_dir" BOOL NOT NULL,
+    "path" VARCHAR NOT NULL,
+    "inode" INT8 NOT NULL,
+    "mtime_seconds" INT8 NOT NULL,
+    "mtime_nanos" INTEGER NOT NULL,
+    "is_symlink" BOOL NOT NULL,
+    "is_ignored" BOOL NOT NULL,
+    PRIMARY KEY(project_id, worktree_id, id),
+    FOREIGN KEY(project_id, worktree_id) REFERENCES worktrees (project_id, id) ON DELETE CASCADE
+);
+CREATE INDEX "index_worktree_entries_on_project_id" ON "worktree_entries" ("project_id");
+CREATE INDEX "index_worktree_entries_on_project_id_and_worktree_id" ON "worktree_entries" ("project_id", "worktree_id");
+
+CREATE TABLE "worktree_diagnostic_summaries" (
+    "project_id" INTEGER NOT NULL,
+    "worktree_id" INT8 NOT NULL,
+    "path" VARCHAR NOT NULL,
+    "language_server_id" INT8 NOT NULL,
+    "error_count" INTEGER NOT NULL,
+    "warning_count" INTEGER NOT NULL,
+    PRIMARY KEY(project_id, worktree_id, path),
+    FOREIGN KEY(project_id, worktree_id) REFERENCES worktrees (project_id, id) ON DELETE CASCADE
+);
+CREATE INDEX "index_worktree_diagnostic_summaries_on_project_id" ON "worktree_diagnostic_summaries" ("project_id");
+CREATE INDEX "index_worktree_diagnostic_summaries_on_project_id_and_worktree_id" ON "worktree_diagnostic_summaries" ("project_id", "worktree_id");
+
+CREATE TABLE "language_servers" (
+    "project_id" INTEGER NOT NULL REFERENCES projects (id) ON DELETE CASCADE,
+    "id" INT8 NOT NULL,
+    "name" VARCHAR NOT NULL,
+    PRIMARY KEY(project_id, id)
+);
+CREATE INDEX "index_language_servers_on_project_id" ON "language_servers" ("project_id");
+
+CREATE TABLE "project_collaborators" (
+    "id" SERIAL PRIMARY KEY,
+    "project_id" INTEGER NOT NULL REFERENCES projects (id) ON DELETE CASCADE,
+    "connection_id" INTEGER NOT NULL,
+    "connection_epoch" UUID NOT NULL,
+    "user_id" INTEGER NOT NULL,
+    "replica_id" INTEGER NOT NULL,
+    "is_host" BOOLEAN NOT NULL
+);
+CREATE INDEX "index_project_collaborators_on_project_id" ON "project_collaborators" ("project_id");
+CREATE UNIQUE INDEX "index_project_collaborators_on_project_id_and_replica_id" ON "project_collaborators" ("project_id", "replica_id");
+CREATE INDEX "index_project_collaborators_on_connection_epoch" ON "project_collaborators" ("connection_epoch");
+
+CREATE TABLE "room_participants" (
+    "id" SERIAL PRIMARY KEY,
+    "room_id" INTEGER NOT NULL REFERENCES rooms (id),
+    "user_id" INTEGER NOT NULL REFERENCES users (id),
+    "answering_connection_id" INTEGER,
+    "answering_connection_epoch" UUID,
+    "location_kind" INTEGER,
+    "location_project_id" INTEGER,
+    "initial_project_id" INTEGER,
+    "calling_user_id" INTEGER NOT NULL REFERENCES users (id),
+    "calling_connection_id" INTEGER NOT NULL,
+    "calling_connection_epoch" UUID NOT NULL
+);
+CREATE UNIQUE INDEX "index_room_participants_on_user_id" ON "room_participants" ("user_id");
+CREATE INDEX "index_room_participants_on_answering_connection_epoch" ON "room_participants" ("answering_connection_epoch");
+CREATE INDEX "index_room_participants_on_calling_connection_epoch" ON "room_participants" ("calling_connection_epoch");

crates/collab2/collab/migrations/20221125192125_add_added_to_mailing_list_to_signups.sql

@@ -0,0 +1,2 @@
+ALTER TABLE "signups"
+    ADD "added_to_mailing_list" BOOLEAN NOT NULL DEFAULT FALSE;

crates/collab2/collab/migrations/20221207165001_add_connection_lost_to_room_participants.sql

@@ -0,0 +1,7 @@
+ALTER TABLE "room_participants"
+    ADD "answering_connection_lost" BOOLEAN NOT NULL DEFAULT FALSE;
+
+CREATE INDEX "index_project_collaborators_on_connection_id" ON "project_collaborators" ("connection_id");
+CREATE UNIQUE INDEX "index_project_collaborators_on_project_id_connection_id_and_epoch" ON "project_collaborators" ("project_id", "connection_id", "connection_epoch");
+CREATE INDEX "index_room_participants_on_answering_connection_id" ON "room_participants" ("answering_connection_id");
+CREATE UNIQUE INDEX "index_room_participants_on_answering_connection_id_and_answering_connection_epoch" ON "room_participants" ("answering_connection_id", "answering_connection_epoch");

crates/collab2/collab/migrations/20221213125710_index_room_participants_on_room_id.sql

@@ -0,0 +1 @@
+CREATE INDEX "index_room_participants_on_room_id" ON "room_participants" ("room_id");

crates/collab2/collab/migrations/20221214144346_change_epoch_from_uuid_to_integer.sql

@@ -0,0 +1,30 @@
+CREATE TABLE servers (
+    id SERIAL PRIMARY KEY,
+    environment VARCHAR NOT NULL
+);
+
+DROP TABLE worktree_extensions;
+DROP TABLE project_activity_periods;
+DELETE from projects;
+ALTER TABLE projects
+    DROP COLUMN host_connection_epoch,
+    ADD COLUMN host_connection_server_id INTEGER REFERENCES servers (id) ON DELETE CASCADE;
+CREATE INDEX "index_projects_on_host_connection_server_id" ON "projects" ("host_connection_server_id");
+CREATE INDEX "index_projects_on_host_connection_id_and_host_connection_server_id" ON "projects" ("host_connection_id", "host_connection_server_id");
+
+DELETE FROM project_collaborators;
+ALTER TABLE project_collaborators
+    DROP COLUMN connection_epoch,
+    ADD COLUMN connection_server_id INTEGER NOT NULL REFERENCES servers (id) ON DELETE CASCADE;
+CREATE INDEX "index_project_collaborators_on_connection_server_id" ON "project_collaborators" ("connection_server_id");
+CREATE UNIQUE INDEX "index_project_collaborators_on_project_id_connection_id_and_server_id" ON "project_collaborators" ("project_id", "connection_id", "connection_server_id");
+
+DELETE FROM room_participants;
+ALTER TABLE room_participants
+    DROP COLUMN answering_connection_epoch,
+    DROP COLUMN calling_connection_epoch,
+    ADD COLUMN answering_connection_server_id INTEGER REFERENCES servers (id) ON DELETE CASCADE,
+    ADD COLUMN calling_connection_server_id INTEGER REFERENCES servers (id) ON DELETE SET NULL;
+CREATE INDEX "index_room_participants_on_answering_connection_server_id" ON "room_participants" ("answering_connection_server_id");
+CREATE INDEX "index_room_participants_on_calling_connection_server_id" ON "room_participants" ("calling_connection_server_id");
+CREATE UNIQUE INDEX "index_room_participants_on_answering_connection_id_and_answering_connection_server_id" ON "room_participants" ("answering_connection_id", "answering_connection_server_id");

crates/collab2/collab/migrations/20221219181850_project_reconnection_support.sql

@@ -0,0 +1,3 @@
+ALTER TABLE "worktree_entries"
+    ADD COLUMN "scan_id" INT8,
+    ADD COLUMN "is_deleted" BOOL;

crates/collab2/collab/migrations/20230103200902_replace_is_completed_with_completed_scan_id.sql

@@ -0,0 +1,3 @@
+ALTER TABLE worktrees
+    ALTER COLUMN is_complete SET DEFAULT FALSE,
+    ADD COLUMN completed_scan_id INT8;

crates/collab2/collab/migrations/20230202155735_followers.sql

@@ -0,0 +1,15 @@
+CREATE TABLE IF NOT EXISTS "followers" (
+    "id" SERIAL PRIMARY KEY,
+    "room_id" INTEGER NOT NULL REFERENCES rooms (id) ON DELETE CASCADE,
+    "project_id" INTEGER NOT NULL REFERENCES projects (id) ON DELETE CASCADE,
+    "leader_connection_server_id" INTEGER NOT NULL REFERENCES servers (id) ON DELETE CASCADE,
+    "leader_connection_id" INTEGER NOT NULL,
+    "follower_connection_server_id" INTEGER NOT NULL REFERENCES servers (id) ON DELETE CASCADE,
+    "follower_connection_id" INTEGER NOT NULL
+);
+
+CREATE UNIQUE INDEX 
+    "index_followers_on_project_id_and_leader_connection_server_id_and_leader_connection_id_and_follower_connection_server_id_and_follower_connection_id"
+ON "followers" ("project_id", "leader_connection_server_id", "leader_connection_id", "follower_connection_server_id", "follower_connection_id");
+
+CREATE INDEX "index_followers_on_room_id" ON "followers" ("room_id");

crates/collab2/collab/migrations/20230508211523_add-repository-entries.sql

@@ -0,0 +1,13 @@
+CREATE TABLE "worktree_repositories" (
+    "project_id" INTEGER NOT NULL,
+    "worktree_id" INT8 NOT NULL,
+    "work_directory_id" INT8 NOT NULL,
+    "scan_id" INT8 NOT NULL,
+    "branch" VARCHAR,
+    "is_deleted" BOOL NOT NULL,
+    PRIMARY KEY(project_id, worktree_id, work_directory_id),
+    FOREIGN KEY(project_id, worktree_id) REFERENCES worktrees (project_id, id) ON DELETE CASCADE,
+    FOREIGN KEY(project_id, worktree_id, work_directory_id) REFERENCES worktree_entries (project_id, worktree_id, id) ON DELETE CASCADE
+);
+CREATE INDEX "index_worktree_repositories_on_project_id" ON "worktree_repositories" ("project_id");
+CREATE INDEX "index_worktree_repositories_on_project_id_and_worktree_id" ON "worktree_repositories" ("project_id", "worktree_id");

crates/collab2/collab/migrations/20230511004019_add_repository_statuses.sql

@@ -0,0 +1,15 @@
+CREATE TABLE "worktree_repository_statuses" (
+    "project_id" INTEGER NOT NULL,
+    "worktree_id" INT8 NOT NULL,
+    "work_directory_id" INT8 NOT NULL,
+    "repo_path" VARCHAR NOT NULL,
+    "status" INT8 NOT NULL,
+    "scan_id" INT8 NOT NULL,
+    "is_deleted" BOOL NOT NULL,
+    PRIMARY KEY(project_id, worktree_id, work_directory_id, repo_path),
+    FOREIGN KEY(project_id, worktree_id) REFERENCES worktrees (project_id, id) ON DELETE CASCADE,
+    FOREIGN KEY(project_id, worktree_id, work_directory_id) REFERENCES worktree_entries (project_id, worktree_id, id) ON DELETE CASCADE
+);
+CREATE INDEX "index_wt_repos_statuses_on_project_id" ON "worktree_repository_statuses" ("project_id");
+CREATE INDEX "index_wt_repos_statuses_on_project_id_and_wt_id" ON "worktree_repository_statuses" ("project_id", "worktree_id");
+CREATE INDEX "index_wt_repos_statuses_on_project_id_and_wt_id_and_wd_id" ON "worktree_repository_statuses" ("project_id", "worktree_id", "work_directory_id");

crates/collab2/collab/migrations/20230529164700_add_worktree_settings_files.sql

@@ -0,0 +1,10 @@
+CREATE TABLE "worktree_settings_files" (
+    "project_id" INTEGER NOT NULL,
+    "worktree_id" INT8 NOT NULL,
+    "path" VARCHAR NOT NULL,
+    "content" TEXT NOT NULL,
+    PRIMARY KEY(project_id, worktree_id, path),
+    FOREIGN KEY(project_id, worktree_id) REFERENCES worktrees (project_id, id) ON DELETE CASCADE
+);
+CREATE INDEX "index_settings_files_on_project_id" ON "worktree_settings_files" ("project_id");
+CREATE INDEX "index_settings_files_on_project_id_and_wt_id" ON "worktree_settings_files" ("project_id", "worktree_id");

crates/collab2/collab/migrations/20230605191135_remove_repository_statuses.sql

@@ -0,0 +1,2 @@
+ALTER TABLE "worktree_entries"
+ADD "git_status" INT8;

crates/collab2/collab/migrations/20230616134535_add_is_external_to_worktree_entries.sql

@@ -0,0 +1,2 @@
+ALTER TABLE "worktree_entries"
+ADD "is_external" BOOL NOT NULL DEFAULT FALSE;

crates/collab2/collab/migrations/20230727150500_add_channels.sql

@@ -0,0 +1,30 @@
+DROP TABLE "channel_messages";
+DROP TABLE "channel_memberships";
+DROP TABLE "org_memberships";
+DROP TABLE "orgs";
+DROP TABLE "channels";
+
+CREATE TABLE "channels" (
+    "id" SERIAL PRIMARY KEY,
+    "name" VARCHAR NOT NULL,
+    "created_at" TIMESTAMP NOT NULL DEFAULT now()
+);
+
+CREATE TABLE "channel_paths" (
+    "id_path" VARCHAR NOT NULL PRIMARY KEY,
+    "channel_id" INTEGER NOT NULL REFERENCES channels (id) ON DELETE CASCADE
+);
+CREATE INDEX "index_channel_paths_on_channel_id" ON "channel_paths" ("channel_id");
+
+CREATE TABLE "channel_members" (
+    "id" SERIAL PRIMARY KEY,
+    "channel_id" INTEGER NOT NULL REFERENCES channels (id) ON DELETE CASCADE,
+    "user_id" INTEGER NOT NULL REFERENCES users (id) ON DELETE CASCADE,
+    "admin" BOOLEAN NOT NULL DEFAULT false,
+    "accepted" BOOLEAN NOT NULL DEFAULT false,
+    "updated_at" TIMESTAMP NOT NULL DEFAULT now()
+);
+
+CREATE UNIQUE INDEX "index_channel_members_on_channel_id_and_user_id" ON "channel_members" ("channel_id", "user_id");
+
+ALTER TABLE rooms ADD COLUMN "channel_id" INTEGER REFERENCES channels (id) ON DELETE CASCADE;

crates/collab2/collab/migrations/20230819154600_add_channel_buffers.sql

@@ -0,0 +1,40 @@
+CREATE TABLE "buffers" (
+    "id" SERIAL PRIMARY KEY,
+    "channel_id" INTEGER NOT NULL REFERENCES channels (id) ON DELETE CASCADE,
+    "epoch" INTEGER NOT NULL DEFAULT 0
+);
+
+CREATE INDEX "index_buffers_on_channel_id" ON "buffers" ("channel_id");
+
+CREATE TABLE "buffer_operations" (
+    "buffer_id" INTEGER NOT NULL REFERENCES buffers (id) ON DELETE CASCADE,
+    "epoch" INTEGER NOT NULL,
+    "replica_id" INTEGER NOT NULL,
+    "lamport_timestamp" INTEGER NOT NULL,
+    "value" BYTEA NOT NULL,
+    PRIMARY KEY(buffer_id, epoch, lamport_timestamp, replica_id)
+);
+
+CREATE TABLE "buffer_snapshots" (
+    "buffer_id" INTEGER NOT NULL REFERENCES buffers (id) ON DELETE CASCADE,
+    "epoch" INTEGER NOT NULL,
+    "text" TEXT NOT NULL,
+    "operation_serialization_version" INTEGER NOT NULL,
+    PRIMARY KEY(buffer_id, epoch)
+);
+
+CREATE TABLE "channel_buffer_collaborators" (
+    "id" SERIAL PRIMARY KEY,
+    "channel_id" INTEGER NOT NULL REFERENCES channels (id) ON DELETE CASCADE,
+    "connection_id" INTEGER NOT NULL,
+    "connection_server_id" INTEGER NOT NULL REFERENCES servers (id) ON DELETE CASCADE,
+    "connection_lost" BOOLEAN NOT NULL DEFAULT FALSE,
+    "user_id" INTEGER NOT NULL REFERENCES users (id) ON DELETE CASCADE,
+    "replica_id" INTEGER NOT NULL
+);
+
+CREATE INDEX "index_channel_buffer_collaborators_on_channel_id" ON "channel_buffer_collaborators" ("channel_id");
+CREATE UNIQUE INDEX "index_channel_buffer_collaborators_on_channel_id_and_replica_id" ON "channel_buffer_collaborators" ("channel_id", "replica_id");
+CREATE INDEX "index_channel_buffer_collaborators_on_connection_server_id" ON "channel_buffer_collaborators" ("connection_server_id");
+CREATE INDEX "index_channel_buffer_collaborators_on_connection_id" ON "channel_buffer_collaborators" ("connection_id");
+CREATE UNIQUE INDEX "index_channel_buffer_collaborators_on_channel_id_connection_id_and_server_id" ON "channel_buffer_collaborators" ("channel_id", "connection_id", "connection_server_id");

crates/collab2/collab/migrations/20230825190322_add_server_feature_flags.sql

@@ -0,0 +1,16 @@
+CREATE TABLE "feature_flags" (
+    "id" SERIAL PRIMARY KEY,
+    "flag" VARCHAR(255) NOT NULL UNIQUE
+);
+
+CREATE UNIQUE INDEX "index_feature_flags" ON "feature_flags" ("id");
+
+CREATE TABLE "user_features" (
+    "user_id" INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    "feature_id" INTEGER NOT NULL REFERENCES feature_flags(id) ON DELETE CASCADE,
+    PRIMARY KEY (user_id, feature_id)
+);
+
+CREATE UNIQUE INDEX "index_user_features_user_id_and_feature_id" ON "user_features" ("user_id", "feature_id");
+CREATE INDEX "index_user_features_on_user_id" ON "user_features" ("user_id");
+CREATE INDEX "index_user_features_on_feature_id" ON "user_features" ("feature_id");

crates/collab2/collab/migrations/20230907114200_add_channel_messages.sql

@@ -0,0 +1,19 @@
+CREATE TABLE IF NOT EXISTS "channel_messages" (
+    "id" SERIAL PRIMARY KEY,
+    "channel_id" INTEGER NOT NULL REFERENCES channels (id) ON DELETE CASCADE,
+    "sender_id" INTEGER NOT NULL REFERENCES users (id),
+    "body" TEXT NOT NULL,
+    "sent_at" TIMESTAMP,
+    "nonce" UUID NOT NULL
+);
+CREATE INDEX "index_channel_messages_on_channel_id" ON "channel_messages" ("channel_id");
+CREATE UNIQUE INDEX "index_channel_messages_on_nonce" ON "channel_messages" ("nonce");
+
+CREATE TABLE IF NOT EXISTS "channel_chat_participants" (
+    "id" SERIAL PRIMARY KEY,
+    "user_id" INTEGER NOT NULL REFERENCES users (id),
+    "channel_id" INTEGER NOT NULL REFERENCES channels (id) ON DELETE CASCADE,
+    "connection_id" INTEGER NOT NULL,
+    "connection_server_id" INTEGER NOT NULL REFERENCES servers (id) ON DELETE CASCADE
+);
+CREATE INDEX "index_channel_chat_participants_on_channel_id" ON "channel_chat_participants" ("channel_id");

crates/collab2/collab/migrations/20230925210437_add_channel_changes.sql

@@ -0,0 +1,19 @@
+CREATE TABLE IF NOT EXISTS "observed_buffer_edits" (
+    "user_id" INTEGER NOT NULL REFERENCES users (id) ON DELETE CASCADE,
+    "buffer_id" INTEGER NOT NULL REFERENCES buffers (id) ON DELETE CASCADE,
+    "epoch" INTEGER NOT NULL,
+    "lamport_timestamp" INTEGER NOT NULL,
+    "replica_id" INTEGER NOT NULL,
+    PRIMARY KEY (user_id, buffer_id)
+);
+
+CREATE UNIQUE INDEX "index_observed_buffer_user_and_buffer_id" ON "observed_buffer_edits" ("user_id", "buffer_id");
+
+CREATE TABLE IF NOT EXISTS "observed_channel_messages" (
+    "user_id" INTEGER NOT NULL REFERENCES users (id) ON DELETE CASCADE,
+    "channel_id" INTEGER NOT NULL REFERENCES channels (id) ON DELETE CASCADE,
+    "channel_message_id" INTEGER NOT NULL,
+    PRIMARY KEY (user_id, channel_id)
+);
+
+CREATE UNIQUE INDEX "index_observed_channel_messages_user_and_channel_id" ON "observed_channel_messages" ("user_id", "channel_id");

crates/collab2/collab/migrations/20230926102500_add_participant_index_to_room_participants.sql

@@ -0,0 +1 @@
+ALTER TABLE room_participants ADD COLUMN participant_index INTEGER;

crates/collab2/collab/migrations/20231004130100_create_notifications.sql

@@ -0,0 +1,22 @@
+CREATE TABLE "notification_kinds" (
+    "id" SERIAL PRIMARY KEY,
+    "name" VARCHAR NOT NULL
+);
+
+CREATE UNIQUE INDEX "index_notification_kinds_on_name" ON "notification_kinds" ("name");
+
+CREATE TABLE notifications (
+    "id" SERIAL PRIMARY KEY,
+    "created_at" TIMESTAMP NOT NULL DEFAULT now(),
+    "recipient_id" INTEGER NOT NULL REFERENCES users (id) ON DELETE CASCADE,
+    "kind" INTEGER NOT NULL REFERENCES notification_kinds (id),
+    "entity_id" INTEGER,
+    "content" TEXT,
+    "is_read" BOOLEAN NOT NULL DEFAULT FALSE,
+    "response" BOOLEAN
+);
+
+CREATE INDEX
+    "index_notifications_on_recipient_id_is_read_kind_entity_id"
+    ON "notifications"
+    ("recipient_id", "is_read", "kind", "entity_id");

crates/collab2/collab/migrations/20231009181554_add_release_channel_to_rooms.sql

@@ -0,0 +1 @@
+ALTER TABLE rooms ADD COLUMN enviroment TEXT;

crates/collab2/collab/migrations/20231010114600_add_unique_index_on_rooms_channel_id.sql

@@ -0,0 +1 @@
+CREATE UNIQUE INDEX "index_rooms_on_channel_id" ON "rooms" ("channel_id");

crates/collab2/collab/migrations/20231011214412_add_guest_role.sql

@@ -0,0 +1,4 @@
+ALTER TABLE channel_members ADD COLUMN role TEXT;
+UPDATE channel_members SET role = CASE WHEN admin THEN 'admin' ELSE 'member' END;
+
+ALTER TABLE channels ADD COLUMN visibility TEXT NOT NULL DEFAULT 'members';

crates/collab2/collab/migrations/20231017185833_projects_room_id_fkey_on_delete_cascade.sql

@@ -0,0 +1,8 @@
+-- Add migration script here
+
+ALTER TABLE projects
+  DROP CONSTRAINT projects_room_id_fkey,
+  ADD CONSTRAINT  projects_room_id_fkey
+    FOREIGN KEY (room_id)
+    REFERENCES rooms (id)
+    ON DELETE CASCADE;

crates/collab2/collab/migrations/20231018102700_create_mentions.sql

@@ -0,0 +1,11 @@
+CREATE TABLE "channel_message_mentions" (
+    "message_id" INTEGER NOT NULL REFERENCES channel_messages (id) ON DELETE CASCADE,
+    "start_offset" INTEGER NOT NULL,
+    "end_offset" INTEGER NOT NULL,
+    "user_id" INTEGER NOT NULL REFERENCES users (id) ON DELETE CASCADE,
+    PRIMARY KEY(message_id, start_offset)
+);
+
+-- We use 'on conflict update' with this index, so it should be per-user.
+CREATE UNIQUE INDEX "index_channel_messages_on_sender_id_nonce" ON "channel_messages" ("sender_id", "nonce");
+DROP INDEX "index_channel_messages_on_nonce";

crates/collab2/collab/migrations/20231024085546_move_channel_paths_to_channels_table.sql

@@ -0,0 +1,12 @@
+ALTER TABLE channels ADD COLUMN parent_path TEXT;
+
+UPDATE channels
+SET parent_path = substr(
+    channel_paths.id_path,
+    2,
+    length(channel_paths.id_path) - length('/' || channel_paths.channel_id::text || '/')
+)
+FROM channel_paths
+WHERE channel_paths.channel_id = channels.id;
+
+CREATE INDEX "index_channels_on_parent_path" ON "channels" ("parent_path");

crates/collab2/collab/src/api.rs

@@ -0,0 +1,184 @@
+use crate::{
+    auth,
+    db::{User, UserId},
+    rpc, AppState, Error, Result,
+};
+use anyhow::anyhow;
+use axum::{
+    body::Body,
+    extract::{Path, Query},
+    http::{self, Request, StatusCode},
+    middleware::{self, Next},
+    response::IntoResponse,
+    routing::{get, post},
+    Extension, Json, Router,
+};
+use axum_extra::response::ErasedJson;
+use serde::{Deserialize, Serialize};
+use std::sync::Arc;
+use tower::ServiceBuilder;
+use tracing::instrument;
+
+pub fn routes(rpc_server: Arc<rpc::Server>, state: Arc<AppState>) -> Router<Body> {
+    Router::new()
+        .route("/user", get(get_authenticated_user))
+        .route("/users/:id/access_tokens", post(create_access_token))
+        .route("/panic", post(trace_panic))
+        .route("/rpc_server_snapshot", get(get_rpc_server_snapshot))
+        .layer(
+            ServiceBuilder::new()
+                .layer(Extension(state))
+                .layer(Extension(rpc_server))
+                .layer(middleware::from_fn(validate_api_token)),
+        )
+}
+
+pub async fn validate_api_token<B>(req: Request<B>, next: Next<B>) -> impl IntoResponse {
+    let token = req
+        .headers()
+        .get(http::header::AUTHORIZATION)
+        .and_then(|header| header.to_str().ok())
+        .ok_or_else(|| {
+            Error::Http(
+                StatusCode::BAD_REQUEST,
+                "missing authorization header".to_string(),
+            )
+        })?
+        .strip_prefix("token ")
+        .ok_or_else(|| {
+            Error::Http(
+                StatusCode::BAD_REQUEST,
+                "invalid authorization header".to_string(),
+            )
+        })?;
+
+    let state = req.extensions().get::<Arc<AppState>>().unwrap();
+
+    if token != state.config.api_token {
+        Err(Error::Http(
+            StatusCode::UNAUTHORIZED,
+            "invalid authorization token".to_string(),
+        ))?
+    }
+
+    Ok::<_, Error>(next.run(req).await)
+}
+
+#[derive(Debug, Deserialize)]
+struct AuthenticatedUserParams {
+    github_user_id: Option<i32>,
+    github_login: String,
+    github_email: Option<String>,
+}
+
+#[derive(Debug, Serialize)]
+struct AuthenticatedUserResponse {
+    user: User,
+    metrics_id: String,
+}
+
+async fn get_authenticated_user(
+    Query(params): Query<AuthenticatedUserParams>,
+    Extension(app): Extension<Arc<AppState>>,
+) -> Result<Json<AuthenticatedUserResponse>> {
+    let user = app
+        .db
+        .get_or_create_user_by_github_account(
+            &params.github_login,
+            params.github_user_id,
+            params.github_email.as_deref(),
+        )
+        .await?
+        .ok_or_else(|| Error::Http(StatusCode::NOT_FOUND, "user not found".into()))?;
+    let metrics_id = app.db.get_user_metrics_id(user.id).await?;
+    return Ok(Json(AuthenticatedUserResponse { user, metrics_id }));
+}
+
+#[derive(Deserialize, Debug)]
+struct CreateUserParams {
+    github_user_id: i32,
+    github_login: String,
+    email_address: String,
+    email_confirmation_code: Option<String>,
+    #[serde(default)]
+    admin: bool,
+    #[serde(default)]
+    invite_count: i32,
+}
+
+#[derive(Serialize, Debug)]
+struct CreateUserResponse {
+    user: User,
+    signup_device_id: Option<String>,
+    metrics_id: String,
+}
+
+#[derive(Debug, Deserialize)]
+struct Panic {
+    version: String,
+    text: String,
+}
+
+#[instrument(skip(panic))]
+async fn trace_panic(panic: Json<Panic>) -> Result<()> {
+    tracing::error!(version = %panic.version, text = %panic.text, "panic report");
+    Ok(())
+}
+
+async fn get_rpc_server_snapshot(
+    Extension(rpc_server): Extension<Arc<rpc::Server>>,
+) -> Result<ErasedJson> {
+    Ok(ErasedJson::pretty(rpc_server.snapshot().await))
+}
+
+#[derive(Deserialize)]
+struct CreateAccessTokenQueryParams {
+    public_key: String,
+    impersonate: Option<String>,
+}
+
+#[derive(Serialize)]
+struct CreateAccessTokenResponse {
+    user_id: UserId,
+    encrypted_access_token: String,
+}
+
+async fn create_access_token(
+    Path(user_id): Path<UserId>,
+    Query(params): Query<CreateAccessTokenQueryParams>,
+    Extension(app): Extension<Arc<AppState>>,
+) -> Result<Json<CreateAccessTokenResponse>> {
+    let user = app
+        .db
+        .get_user_by_id(user_id)
+        .await?
+        .ok_or_else(|| anyhow!("user not found"))?;
+
+    let mut user_id = user.id;
+    if let Some(impersonate) = params.impersonate {
+        if user.admin {
+            if let Some(impersonated_user) = app.db.get_user_by_github_login(&impersonate).await? {
+                user_id = impersonated_user.id;
+            } else {
+                return Err(Error::Http(
+                    StatusCode::UNPROCESSABLE_ENTITY,
+                    format!("user {impersonate} does not exist"),
+                ));
+            }
+        } else {
+            return Err(Error::Http(
+                StatusCode::UNAUTHORIZED,
+                "you do not have permission to impersonate other users".to_string(),
+            ));
+        }
+    }
+
+    let access_token = auth::create_access_token(app.db.as_ref(), user_id).await?;
+    let encrypted_access_token =
+        auth::encrypt_access_token(&access_token, params.public_key.clone())?;
+
+    Ok(Json(CreateAccessTokenResponse {
+        user_id,
+        encrypted_access_token,
+    }))
+}

crates/collab2/collab/src/auth.rs

@@ -0,0 +1,151 @@
+use crate::{
+    db::{self, AccessTokenId, Database, UserId},
+    AppState, Error, Result,
+};
+use anyhow::{anyhow, Context};
+use axum::{
+    http::{self, Request, StatusCode},
+    middleware::Next,
+    response::IntoResponse,
+};
+use lazy_static::lazy_static;
+use prometheus::{exponential_buckets, register_histogram, Histogram};
+use rand::thread_rng;
+use scrypt::{
+    password_hash::{PasswordHash, PasswordHasher, PasswordVerifier, SaltString},
+    Scrypt,
+};
+use serde::{Deserialize, Serialize};
+use std::{sync::Arc, time::Instant};
+
+lazy_static! {
+    static ref METRIC_ACCESS_TOKEN_HASHING_TIME: Histogram = register_histogram!(
+        "access_token_hashing_time",
+        "time spent hashing access tokens",
+        exponential_buckets(10.0, 2.0, 10).unwrap(),
+    )
+    .unwrap();
+}
+
+pub async fn validate_header<B>(mut req: Request<B>, next: Next<B>) -> impl IntoResponse {
+    let mut auth_header = req
+        .headers()
+        .get(http::header::AUTHORIZATION)
+        .and_then(|header| header.to_str().ok())
+        .ok_or_else(|| {
+            Error::Http(
+                StatusCode::UNAUTHORIZED,
+                "missing authorization header".to_string(),
+            )
+        })?
+        .split_whitespace();
+
+    let user_id = UserId(auth_header.next().unwrap_or("").parse().map_err(|_| {
+        Error::Http(
+            StatusCode::BAD_REQUEST,
+            "missing user id in authorization header".to_string(),
+        )
+    })?);
+
+    let access_token = auth_header.next().ok_or_else(|| {
+        Error::Http(
+            StatusCode::BAD_REQUEST,
+            "missing access token in authorization header".to_string(),
+        )
+    })?;
+
+    let state = req.extensions().get::<Arc<AppState>>().unwrap();
+    let credentials_valid = if let Some(admin_token) = access_token.strip_prefix("ADMIN_TOKEN:") {
+        state.config.api_token == admin_token
+    } else {
+        verify_access_token(&access_token, user_id, &state.db)
+            .await
+            .unwrap_or(false)
+    };
+
+    if credentials_valid {
+        let user = state
+            .db
+            .get_user_by_id(user_id)
+            .await?
+            .ok_or_else(|| anyhow!("user {} not found", user_id))?;
+        req.extensions_mut().insert(user);
+        Ok::<_, Error>(next.run(req).await)
+    } else {
+        Err(Error::Http(
+            StatusCode::UNAUTHORIZED,
+            "invalid credentials".to_string(),
+        ))
+    }
+}
+
+const MAX_ACCESS_TOKENS_TO_STORE: usize = 8;
+
+#[derive(Serialize, Deserialize)]
+struct AccessTokenJson {
+    version: usize,
+    id: AccessTokenId,
+    token: String,
+}
+
+pub async fn create_access_token(db: &db::Database, user_id: UserId) -> Result<String> {
+    const VERSION: usize = 1;
+    let access_token = rpc::auth::random_token();
+    let access_token_hash =
+        hash_access_token(&access_token).context("failed to hash access token")?;
+    let id = db
+        .create_access_token(user_id, &access_token_hash, MAX_ACCESS_TOKENS_TO_STORE)
+        .await?;
+    Ok(serde_json::to_string(&AccessTokenJson {
+        version: VERSION,
+        id,
+        token: access_token,
+    })?)
+}
+
+fn hash_access_token(token: &str) -> Result<String> {
+    // Avoid slow hashing in debug mode.
+    let params = if cfg!(debug_assertions) {
+        scrypt::Params::new(1, 1, 1).unwrap()
+    } else {
+        scrypt::Params::new(14, 8, 1).unwrap()
+    };
+
+    Ok(Scrypt
+        .hash_password(
+            token.as_bytes(),
+            None,
+            params,
+            &SaltString::generate(thread_rng()),
+        )
+        .map_err(anyhow::Error::new)?
+        .to_string())
+}
+
+pub fn encrypt_access_token(access_token: &str, public_key: String) -> Result<String> {
+    let native_app_public_key =
+        rpc::auth::PublicKey::try_from(public_key).context("failed to parse app public key")?;
+    let encrypted_access_token = native_app_public_key
+        .encrypt_string(access_token)
+        .context("failed to encrypt access token with public key")?;
+    Ok(encrypted_access_token)
+}
+
+pub async fn verify_access_token(token: &str, user_id: UserId, db: &Arc<Database>) -> Result<bool> {
+    let token: AccessTokenJson = serde_json::from_str(&token)?;
+
+    let db_token = db.get_access_token(token.id).await?;
+    if db_token.user_id != user_id {
+        return Err(anyhow!("no such access token"))?;
+    }
+
+    let db_hash = PasswordHash::new(&db_token.hash).map_err(anyhow::Error::new)?;
+    let t0 = Instant::now();
+    let is_valid = Scrypt
+        .verify_password(token.token.as_bytes(), &db_hash)
+        .is_ok();
+    let duration = t0.elapsed();
+    log::info!("hashed access token in {:?}", duration);
+    METRIC_ACCESS_TOKEN_HASHING_TIME.observe(duration.as_millis() as f64);
+    Ok(is_valid)
+}

crates/collab2/collab/src/bin/dotenv.rs

@@ -0,0 +1,20 @@
+use anyhow::anyhow;
+use std::fs;
+
+fn main() -> anyhow::Result<()> {
+    let env: toml::map::Map<String, toml::Value> = toml::de::from_str(
+        &fs::read_to_string("./.env.toml").map_err(|_| anyhow!("no .env.toml file found"))?,
+    )?;
+
+    for (key, value) in env {
+        let value = match value {
+            toml::Value::String(value) => value,
+            toml::Value::Integer(value) => value.to_string(),
+            toml::Value::Float(value) => value.to_string(),
+            _ => panic!("unsupported TOML value in .env.toml for key {}", key),
+        };
+        println!("export {}=\"{}\"", key, value);
+    }
+
+    Ok(())
+}

crates/collab2/collab/src/bin/seed.rs

@@ -0,0 +1,107 @@
+use collab::{db, executor::Executor};
+use db::{ConnectOptions, Database};
+use serde::{de::DeserializeOwned, Deserialize};
+use std::fmt::Write;
+
+#[derive(Debug, Deserialize)]
+struct GitHubUser {
+    id: i32,
+    login: String,
+    email: Option<String>,
+}
+
+#[tokio::main]
+async fn main() {
+    let database_url = std::env::var("DATABASE_URL").expect("missing DATABASE_URL env var");
+    let db = Database::new(ConnectOptions::new(database_url), Executor::Production)
+        .await
+        .expect("failed to connect to postgres database");
+    let github_token = std::env::var("GITHUB_TOKEN").expect("missing GITHUB_TOKEN env var");
+    let client = reqwest::Client::new();
+
+    let mut current_user =
+        fetch_github::<GitHubUser>(&client, &github_token, "https://api.github.com/user").await;
+    current_user
+        .email
+        .get_or_insert_with(|| "placeholder@example.com".to_string());
+    let staff_users = fetch_github::<Vec<GitHubUser>>(
+        &client,
+        &github_token,
+        "https://api.github.com/orgs/zed-industries/teams/staff/members",
+    )
+    .await;
+
+    let mut zed_users = Vec::new();
+    zed_users.push((current_user, true));
+    zed_users.extend(staff_users.into_iter().map(|user| (user, true)));
+
+    let user_count = db
+        .get_all_users(0, 200)
+        .await
+        .expect("failed to load users from db")
+        .len();
+    if user_count < 100 {
+        let mut last_user_id = None;
+        for _ in 0..10 {
+            let mut uri = "https://api.github.com/users?per_page=100".to_string();
+            if let Some(last_user_id) = last_user_id {
+                write!(&mut uri, "&since={}", last_user_id).unwrap();
+            }
+            let users = fetch_github::<Vec<GitHubUser>>(&client, &github_token, &uri).await;
+            if let Some(last_user) = users.last() {
+                last_user_id = Some(last_user.id);
+                zed_users.extend(users.into_iter().map(|user| (user, false)));
+            } else {
+                break;
+            }
+        }
+    }
+
+    for (github_user, admin) in zed_users {
+        if db
+            .get_user_by_github_login(&github_user.login)
+            .await
+            .expect("failed to fetch user")
+            .is_none()
+        {
+            if admin {
+                db.create_user(
+                    &format!("{}@zed.dev", github_user.login),
+                    admin,
+                    db::NewUserParams {
+                        github_login: github_user.login,
+                        github_user_id: github_user.id,
+                    },
+                )
+                .await
+                .expect("failed to insert user");
+            } else {
+                db.get_or_create_user_by_github_account(
+                    &github_user.login,
+                    Some(github_user.id),
+                    github_user.email.as_deref(),
+                )
+                .await
+                .expect("failed to insert user");
+            }
+        }
+    }
+}
+
+async fn fetch_github<T: DeserializeOwned>(
+    client: &reqwest::Client,
+    access_token: &str,
+    url: &str,
+) -> T {
+    let response = client
+        .get(url)
+        .bearer_auth(&access_token)
+        .header("user-agent", "zed")
+        .send()
+        .await
+        .expect(&format!("failed to fetch '{}'", url));
+    response
+        .json()
+        .await
+        .expect(&format!("failed to deserialize github user from '{}'", url))
+}

crates/collab2/collab/src/db.rs

@@ -0,0 +1,672 @@
+#[cfg(test)]
+pub mod tests;
+
+#[cfg(test)]
+pub use tests::TestDb;
+
+mod ids;
+mod queries;
+mod tables;
+
+use crate::{executor::Executor, Error, Result};
+use anyhow::anyhow;
+use collections::{BTreeMap, HashMap, HashSet};
+use dashmap::DashMap;
+use futures::StreamExt;
+use rand::{prelude::StdRng, Rng, SeedableRng};
+use rpc::{
+    proto::{self},
+    ConnectionId,
+};
+use sea_orm::{
+    entity::prelude::*,
+    sea_query::{Alias, Expr, OnConflict},
+    ActiveValue, Condition, ConnectionTrait, DatabaseConnection, DatabaseTransaction, DbErr,
+    FromQueryResult, IntoActiveModel, IsolationLevel, JoinType, QueryOrder, QuerySelect, Statement,
+    TransactionTrait,
+};
+use serde::{Deserialize, Serialize};
+use sqlx::{
+    migrate::{Migrate, Migration, MigrationSource},
+    Connection,
+};
+use std::{
+    fmt::Write as _,
+    future::Future,
+    marker::PhantomData,
+    ops::{Deref, DerefMut},
+    path::Path,
+    rc::Rc,
+    sync::Arc,
+    time::Duration,
+};
+use tables::*;
+use tokio::sync::{Mutex, OwnedMutexGuard};
+
+pub use ids::*;
+pub use sea_orm::ConnectOptions;
+pub use tables::user::Model as User;
+
+pub struct Database {
+    options: ConnectOptions,
+    pool: DatabaseConnection,
+    rooms: DashMap<RoomId, Arc<Mutex<()>>>,
+    rng: Mutex<StdRng>,
+    executor: Executor,
+    notification_kinds_by_id: HashMap<NotificationKindId, &'static str>,
+    notification_kinds_by_name: HashMap<String, NotificationKindId>,
+    #[cfg(test)]
+    runtime: Option<tokio::runtime::Runtime>,
+}
+
+// The `Database` type has so many methods that its impl blocks are split into
+// separate files in the `queries` folder.
+impl Database {
+    pub async fn new(options: ConnectOptions, executor: Executor) -> Result<Self> {
+        sqlx::any::install_default_drivers();
+        Ok(Self {
+            options: options.clone(),
+            pool: sea_orm::Database::connect(options).await?,
+            rooms: DashMap::with_capacity(16384),
+            rng: Mutex::new(StdRng::seed_from_u64(0)),
+            notification_kinds_by_id: HashMap::default(),
+            notification_kinds_by_name: HashMap::default(),
+            executor,
+            #[cfg(test)]
+            runtime: None,
+        })
+    }
+
+    #[cfg(test)]
+    pub fn reset(&self) {
+        self.rooms.clear();
+    }
+
+    pub async fn migrate(
+        &self,
+        migrations_path: &Path,
+        ignore_checksum_mismatch: bool,
+    ) -> anyhow::Result<Vec<(Migration, Duration)>> {
+        let migrations = MigrationSource::resolve(migrations_path)
+            .await
+            .map_err(|err| anyhow!("failed to load migrations: {err:?}"))?;
+
+        let mut connection = sqlx::AnyConnection::connect(self.options.get_url()).await?;
+
+        connection.ensure_migrations_table().await?;
+        let applied_migrations: HashMap<_, _> = connection
+            .list_applied_migrations()
+            .await?
+            .into_iter()
+            .map(|m| (m.version, m))
+            .collect();
+
+        let mut new_migrations = Vec::new();
+        for migration in migrations {
+            match applied_migrations.get(&migration.version) {
+                Some(applied_migration) => {
+                    if migration.checksum != applied_migration.checksum && !ignore_checksum_mismatch
+                    {
+                        Err(anyhow!(
+                            "checksum mismatch for applied migration {}",
+                            migration.description
+                        ))?;
+                    }
+                }
+                None => {
+                    let elapsed = connection.apply(&migration).await?;
+                    new_migrations.push((migration, elapsed));
+                }
+            }
+        }
+
+        Ok(new_migrations)
+    }
+
+    pub async fn initialize_static_data(&mut self) -> Result<()> {
+        self.initialize_notification_kinds().await?;
+        Ok(())
+    }
+
+    pub async fn transaction<F, Fut, T>(&self, f: F) -> Result<T>
+    where
+        F: Send + Fn(TransactionHandle) -> Fut,
+        Fut: Send + Future<Output = Result<T>>,
+    {
+        let body = async {
+            let mut i = 0;
+            loop {
+                let (tx, result) = self.with_transaction(&f).await?;
+                match result {
+                    Ok(result) => match tx.commit().await.map_err(Into::into) {
+                        Ok(()) => return Ok(result),
+                        Err(error) => {
+                            if !self.retry_on_serialization_error(&error, i).await {
+                                return Err(error);
+                            }
+                        }
+                    },
+                    Err(error) => {
+                        tx.rollback().await?;
+                        if !self.retry_on_serialization_error(&error, i).await {
+                            return Err(error);
+                        }
+                    }
+                }
+                i += 1;
+            }
+        };
+
+        self.run(body).await
+    }
+
+    async fn optional_room_transaction<F, Fut, T>(&self, f: F) -> Result<Option<RoomGuard<T>>>
+    where
+        F: Send + Fn(TransactionHandle) -> Fut,
+        Fut: Send + Future<Output = Result<Option<(RoomId, T)>>>,
+    {
+        let body = async {
+            let mut i = 0;
+            loop {
+                let (tx, result) = self.with_transaction(&f).await?;
+                match result {
+                    Ok(Some((room_id, data))) => {
+                        let lock = self.rooms.entry(room_id).or_default().clone();
+                        let _guard = lock.lock_owned().await;
+                        match tx.commit().await.map_err(Into::into) {
+                            Ok(()) => {
+                                return Ok(Some(RoomGuard {
+                                    data,
+                                    _guard,
+                                    _not_send: PhantomData,
+                                }));
+                            }
+                            Err(error) => {
+                                if !self.retry_on_serialization_error(&error, i).await {
+                                    return Err(error);
+                                }
+                            }
+                        }
+                    }
+                    Ok(None) => match tx.commit().await.map_err(Into::into) {
+                        Ok(()) => return Ok(None),
+                        Err(error) => {
+                            if !self.retry_on_serialization_error(&error, i).await {
+                                return Err(error);
+                            }
+                        }
+                    },
+                    Err(error) => {
+                        tx.rollback().await?;
+                        if !self.retry_on_serialization_error(&error, i).await {
+                            return Err(error);
+                        }
+                    }
+                }
+                i += 1;
+            }
+        };
+
+        self.run(body).await
+    }
+
+    async fn room_transaction<F, Fut, T>(&self, room_id: RoomId, f: F) -> Result<RoomGuard<T>>
+    where
+        F: Send + Fn(TransactionHandle) -> Fut,
+        Fut: Send + Future<Output = Result<T>>,
+    {
+        let body = async {
+            let mut i = 0;
+            loop {
+                let lock = self.rooms.entry(room_id).or_default().clone();
+                let _guard = lock.lock_owned().await;
+                let (tx, result) = self.with_transaction(&f).await?;
+                match result {
+                    Ok(data) => match tx.commit().await.map_err(Into::into) {
+                        Ok(()) => {
+                            return Ok(RoomGuard {
+                                data,
+                                _guard,
+                                _not_send: PhantomData,
+                            });
+                        }
+                        Err(error) => {
+                            if !self.retry_on_serialization_error(&error, i).await {
+                                return Err(error);
+                            }
+                        }
+                    },
+                    Err(error) => {
+                        tx.rollback().await?;
+                        if !self.retry_on_serialization_error(&error, i).await {
+                            return Err(error);
+                        }
+                    }
+                }
+                i += 1;
+            }
+        };
+
+        self.run(body).await
+    }
+
+    async fn with_transaction<F, Fut, T>(&self, f: &F) -> Result<(DatabaseTransaction, Result<T>)>
+    where
+        F: Send + Fn(TransactionHandle) -> Fut,
+        Fut: Send + Future<Output = Result<T>>,
+    {
+        let tx = self
+            .pool
+            .begin_with_config(Some(IsolationLevel::Serializable), None)
+            .await?;
+
+        let mut tx = Arc::new(Some(tx));
+        let result = f(TransactionHandle(tx.clone())).await;
+        let Some(tx) = Arc::get_mut(&mut tx).and_then(|tx| tx.take()) else {
+            return Err(anyhow!(
+                "couldn't complete transaction because it's still in use"
+            ))?;
+        };
+
+        Ok((tx, result))
+    }
+
+    async fn run<F, T>(&self, future: F) -> Result<T>
+    where
+        F: Future<Output = Result<T>>,
+    {
+        #[cfg(test)]
+        {
+            if let Executor::Deterministic(executor) = &self.executor {
+                executor.simulate_random_delay().await;
+            }
+
+            self.runtime.as_ref().unwrap().block_on(future)
+        }
+
+        #[cfg(not(test))]
+        {
+            future.await
+        }
+    }
+
+    async fn retry_on_serialization_error(&self, error: &Error, prev_attempt_count: u32) -> bool {
+        // If the error is due to a failure to serialize concurrent transactions, then retry
+        // this transaction after a delay. With each subsequent retry, double the delay duration.
+        // Also vary the delay randomly in order to ensure different database connections retry
+        // at different times.
+        if is_serialization_error(error) {
+            let base_delay = 4_u64 << prev_attempt_count.min(16);
+            let randomized_delay = base_delay as f32 * self.rng.lock().await.gen_range(0.5..=2.0);
+            log::info!(
+                "retrying transaction after serialization error. delay: {} ms.",
+                randomized_delay
+            );
+            self.executor
+                .sleep(Duration::from_millis(randomized_delay as u64))
+                .await;
+            true
+        } else {
+            false
+        }
+    }
+}
+
+fn is_serialization_error(error: &Error) -> bool {
+    const SERIALIZATION_FAILURE_CODE: &'static str = "40001";
+    match error {
+        Error::Database(
+            DbErr::Exec(sea_orm::RuntimeErr::SqlxError(error))
+            | DbErr::Query(sea_orm::RuntimeErr::SqlxError(error)),
+        ) if error
+            .as_database_error()
+            .and_then(|error| error.code())
+            .as_deref()
+            == Some(SERIALIZATION_FAILURE_CODE) =>
+        {
+            true
+        }
+        _ => false,
+    }
+}
+
+pub struct TransactionHandle(Arc<Option<DatabaseTransaction>>);
+
+impl Deref for TransactionHandle {
+    type Target = DatabaseTransaction;
+
+    fn deref(&self) -> &Self::Target {
+        self.0.as_ref().as_ref().unwrap()
+    }
+}
+
+pub struct RoomGuard<T> {
+    data: T,
+    _guard: OwnedMutexGuard<()>,
+    _not_send: PhantomData<Rc<()>>,
+}
+
+impl<T> Deref for RoomGuard<T> {
+    type Target = T;
+
+    fn deref(&self) -> &T {
+        &self.data
+    }
+}
+
+impl<T> DerefMut for RoomGuard<T> {
+    fn deref_mut(&mut self) -> &mut T {
+        &mut self.data
+    }
+}
+
+impl<T> RoomGuard<T> {
+    pub fn into_inner(self) -> T {
+        self.data
+    }
+}
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub enum Contact {
+    Accepted { user_id: UserId, busy: bool },
+    Outgoing { user_id: UserId },
+    Incoming { user_id: UserId },
+}
+
+impl Contact {
+    pub fn user_id(&self) -> UserId {
+        match self {
+            Contact::Accepted { user_id, .. } => *user_id,
+            Contact::Outgoing { user_id } => *user_id,
+            Contact::Incoming { user_id, .. } => *user_id,
+        }
+    }
+}
+
+pub type NotificationBatch = Vec<(UserId, proto::Notification)>;
+
+pub struct CreatedChannelMessage {
+    pub message_id: MessageId,
+    pub participant_connection_ids: Vec<ConnectionId>,
+    pub channel_members: Vec<UserId>,
+    pub notifications: NotificationBatch,
+}
+
+#[derive(Clone, Debug, PartialEq, Eq, FromQueryResult, Serialize, Deserialize)]
+pub struct Invite {
+    pub email_address: String,
+    pub email_confirmation_code: String,
+}
+
+#[derive(Clone, Debug, Deserialize)]
+pub struct NewSignup {
+    pub email_address: String,
+    pub platform_mac: bool,
+    pub platform_windows: bool,
+    pub platform_linux: bool,
+    pub editor_features: Vec<String>,
+    pub programming_languages: Vec<String>,
+    pub device_id: Option<String>,
+    pub added_to_mailing_list: bool,
+    pub created_at: Option<DateTime>,
+}
+
+#[derive(Clone, Debug, PartialEq, Deserialize, Serialize, FromQueryResult)]
+pub struct WaitlistSummary {
+    pub count: i64,
+    pub linux_count: i64,
+    pub mac_count: i64,
+    pub windows_count: i64,
+    pub unknown_count: i64,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct NewUserParams {
+    pub github_login: String,
+    pub github_user_id: i32,
+}
+
+#[derive(Debug)]
+pub struct NewUserResult {
+    pub user_id: UserId,
+    pub metrics_id: String,
+    pub inviting_user_id: Option<UserId>,
+    pub signup_device_id: Option<String>,
+}
+
+#[derive(Debug)]
+pub struct MoveChannelResult {
+    pub participants_to_update: HashMap<UserId, ChannelsForUser>,
+    pub participants_to_remove: HashSet<UserId>,
+    pub moved_channels: HashSet<ChannelId>,
+}
+
+#[derive(Debug)]
+pub struct RenameChannelResult {
+    pub channel: Channel,
+    pub participants_to_update: HashMap<UserId, Channel>,
+}
+
+#[derive(Debug)]
+pub struct CreateChannelResult {
+    pub channel: Channel,
+    pub participants_to_update: Vec<(UserId, ChannelsForUser)>,
+}
+
+#[derive(Debug)]
+pub struct SetChannelVisibilityResult {
+    pub participants_to_update: HashMap<UserId, ChannelsForUser>,
+    pub participants_to_remove: HashSet<UserId>,
+    pub channels_to_remove: Vec<ChannelId>,
+}
+
+#[derive(Debug)]
+pub struct MembershipUpdated {
+    pub channel_id: ChannelId,
+    pub new_channels: ChannelsForUser,
+    pub removed_channels: Vec<ChannelId>,
+}
+
+#[derive(Debug)]
+pub enum SetMemberRoleResult {
+    InviteUpdated(Channel),
+    MembershipUpdated(MembershipUpdated),
+}
+
+#[derive(Debug)]
+pub struct InviteMemberResult {
+    pub channel: Channel,
+    pub notifications: NotificationBatch,
+}
+
+#[derive(Debug)]
+pub struct RespondToChannelInvite {
+    pub membership_update: Option<MembershipUpdated>,
+    pub notifications: NotificationBatch,
+}
+
+#[derive(Debug)]
+pub struct RemoveChannelMemberResult {
+    pub membership_update: MembershipUpdated,
+    pub notification_id: Option<NotificationId>,
+}
+
+#[derive(Debug, PartialEq, Eq, Hash)]
+pub struct Channel {
+    pub id: ChannelId,
+    pub name: String,
+    pub visibility: ChannelVisibility,
+    pub role: ChannelRole,
+    pub parent_path: Vec<ChannelId>,
+}
+
+impl Channel {
+    fn from_model(value: channel::Model, role: ChannelRole) -> Self {
+        Channel {
+            id: value.id,
+            visibility: value.visibility,
+            name: value.clone().name,
+            role,
+            parent_path: value.ancestors().collect(),
+        }
+    }
+
+    pub fn to_proto(&self) -> proto::Channel {
+        proto::Channel {
+            id: self.id.to_proto(),
+            name: self.name.clone(),
+            visibility: self.visibility.into(),
+            role: self.role.into(),
+            parent_path: self.parent_path.iter().map(|c| c.to_proto()).collect(),
+        }
+    }
+}
+
+#[derive(Debug, PartialEq, Eq, Hash)]
+pub struct ChannelMember {
+    pub role: ChannelRole,
+    pub user_id: UserId,
+    pub kind: proto::channel_member::Kind,
+}
+
+impl ChannelMember {
+    pub fn to_proto(&self) -> proto::ChannelMember {
+        proto::ChannelMember {
+            role: self.role.into(),
+            user_id: self.user_id.to_proto(),
+            kind: self.kind.into(),
+        }
+    }
+}
+
+#[derive(Debug, PartialEq)]
+pub struct ChannelsForUser {
+    pub channels: Vec<Channel>,
+    pub channel_participants: HashMap<ChannelId, Vec<UserId>>,
+    pub unseen_buffer_changes: Vec<proto::UnseenChannelBufferChange>,
+    pub channel_messages: Vec<proto::UnseenChannelMessage>,
+}
+
+#[derive(Debug)]
+pub struct RejoinedChannelBuffer {
+    pub buffer: proto::RejoinedChannelBuffer,
+    pub old_connection_id: ConnectionId,
+}
+
+#[derive(Clone)]
+pub struct JoinRoom {
+    pub room: proto::Room,
+    pub channel_id: Option<ChannelId>,
+    pub channel_members: Vec<UserId>,
+}
+
+pub struct RejoinedRoom {
+    pub room: proto::Room,
+    pub rejoined_projects: Vec<RejoinedProject>,
+    pub reshared_projects: Vec<ResharedProject>,
+    pub channel_id: Option<ChannelId>,
+    pub channel_members: Vec<UserId>,
+}
+
+pub struct ResharedProject {
+    pub id: ProjectId,
+    pub old_connection_id: ConnectionId,
+    pub collaborators: Vec<ProjectCollaborator>,
+    pub worktrees: Vec<proto::WorktreeMetadata>,
+}
+
+pub struct RejoinedProject {
+    pub id: ProjectId,
+    pub old_connection_id: ConnectionId,
+    pub collaborators: Vec<ProjectCollaborator>,
+    pub worktrees: Vec<RejoinedWorktree>,
+    pub language_servers: Vec<proto::LanguageServer>,
+}
+
+#[derive(Debug)]
+pub struct RejoinedWorktree {
+    pub id: u64,
+    pub abs_path: String,
+    pub root_name: String,
+    pub visible: bool,
+    pub updated_entries: Vec<proto::Entry>,
+    pub removed_entries: Vec<u64>,
+    pub updated_repositories: Vec<proto::RepositoryEntry>,
+    pub removed_repositories: Vec<u64>,
+    pub diagnostic_summaries: Vec<proto::DiagnosticSummary>,
+    pub settings_files: Vec<WorktreeSettingsFile>,
+    pub scan_id: u64,
+    pub completed_scan_id: u64,
+}
+
+pub struct LeftRoom {
+    pub room: proto::Room,
+    pub channel_id: Option<ChannelId>,
+    pub channel_members: Vec<UserId>,
+    pub left_projects: HashMap<ProjectId, LeftProject>,
+    pub canceled_calls_to_user_ids: Vec<UserId>,
+    pub deleted: bool,
+}
+
+pub struct RefreshedRoom {
+    pub room: proto::Room,
+    pub channel_id: Option<ChannelId>,
+    pub channel_members: Vec<UserId>,
+    pub stale_participant_user_ids: Vec<UserId>,
+    pub canceled_calls_to_user_ids: Vec<UserId>,
+}
+
+pub struct RefreshedChannelBuffer {
+    pub connection_ids: Vec<ConnectionId>,
+    pub collaborators: Vec<proto::Collaborator>,
+}
+
+pub struct Project {
+    pub collaborators: Vec<ProjectCollaborator>,
+    pub worktrees: BTreeMap<u64, Worktree>,
+    pub language_servers: Vec<proto::LanguageServer>,
+}
+
+pub struct ProjectCollaborator {
+    pub connection_id: ConnectionId,
+    pub user_id: UserId,
+    pub replica_id: ReplicaId,
+    pub is_host: bool,
+}
+
+impl ProjectCollaborator {
+    pub fn to_proto(&self) -> proto::Collaborator {
+        proto::Collaborator {
+            peer_id: Some(self.connection_id.into()),
+            replica_id: self.replica_id.0 as u32,
+            user_id: self.user_id.to_proto(),
+        }
+    }
+}
+
+#[derive(Debug)]
+pub struct LeftProject {
+    pub id: ProjectId,
+    pub host_user_id: UserId,
+    pub host_connection_id: ConnectionId,
+    pub connection_ids: Vec<ConnectionId>,
+}
+
+pub struct Worktree {
+    pub id: u64,
+    pub abs_path: String,
+    pub root_name: String,
+    pub visible: bool,
+    pub entries: Vec<proto::Entry>,
+    pub repository_entries: BTreeMap<u64, proto::RepositoryEntry>,
+    pub diagnostic_summaries: Vec<proto::DiagnosticSummary>,
+    pub settings_files: Vec<WorktreeSettingsFile>,
+    pub scan_id: u64,
+    pub completed_scan_id: u64,
+}
+
+#[derive(Debug)]
+pub struct WorktreeSettingsFile {
+    pub path: String,
+    pub content: String,
+}

crates/collab2/collab/src/db/ids.rs

@@ -0,0 +1,199 @@
+use crate::Result;
+use rpc::proto;
+use sea_orm::{entity::prelude::*, DbErr};
+use serde::{Deserialize, Serialize};
+
+macro_rules! id_type {
+    ($name:ident) => {
+        #[derive(
+            Clone,
+            Copy,
+            Debug,
+            Default,
+            PartialEq,
+            Eq,
+            PartialOrd,
+            Ord,
+            Hash,
+            Serialize,
+            Deserialize,
+            DeriveValueType,
+        )]
+        #[serde(transparent)]
+        pub struct $name(pub i32);
+
+        impl $name {
+            #[allow(unused)]
+            pub const MAX: Self = Self(i32::MAX);
+
+            #[allow(unused)]
+            pub fn from_proto(value: u64) -> Self {
+                Self(value as i32)
+            }
+
+            #[allow(unused)]
+            pub fn to_proto(self) -> u64 {
+                self.0 as u64
+            }
+        }
+
+        impl std::fmt::Display for $name {
+            fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+                self.0.fmt(f)
+            }
+        }
+
+        impl sea_orm::TryFromU64 for $name {
+            fn try_from_u64(n: u64) -> Result<Self, DbErr> {
+                Ok(Self(n.try_into().map_err(|_| {
+                    DbErr::ConvertFromU64(concat!(
+                        "error converting ",
+                        stringify!($name),
+                        " to u64"
+                    ))
+                })?))
+            }
+        }
+
+        impl sea_orm::sea_query::Nullable for $name {
+            fn null() -> Value {
+                Value::Int(None)
+            }
+        }
+    };
+}
+
+id_type!(BufferId);
+id_type!(AccessTokenId);
+id_type!(ChannelChatParticipantId);
+id_type!(ChannelId);
+id_type!(ChannelMemberId);
+id_type!(MessageId);
+id_type!(ContactId);
+id_type!(FollowerId);
+id_type!(RoomId);
+id_type!(RoomParticipantId);
+id_type!(ProjectId);
+id_type!(ProjectCollaboratorId);
+id_type!(ReplicaId);
+id_type!(ServerId);
+id_type!(SignupId);
+id_type!(UserId);
+id_type!(ChannelBufferCollaboratorId);
+id_type!(FlagId);
+id_type!(NotificationId);
+id_type!(NotificationKindId);
+
+#[derive(Eq, PartialEq, Copy, Clone, Debug, EnumIter, DeriveActiveEnum, Default, Hash)]
+#[sea_orm(rs_type = "String", db_type = "String(None)")]
+pub enum ChannelRole {
+    #[sea_orm(string_value = "admin")]
+    Admin,
+    #[sea_orm(string_value = "member")]
+    #[default]
+    Member,
+    #[sea_orm(string_value = "guest")]
+    Guest,
+    #[sea_orm(string_value = "banned")]
+    Banned,
+}
+
+impl ChannelRole {
+    pub fn should_override(&self, other: Self) -> bool {
+        use ChannelRole::*;
+        match self {
+            Admin => matches!(other, Member | Banned | Guest),
+            Member => matches!(other, Banned | Guest),
+            Banned => matches!(other, Guest),
+            Guest => false,
+        }
+    }
+
+    pub fn max(&self, other: Self) -> Self {
+        if self.should_override(other) {
+            *self
+        } else {
+            other
+        }
+    }
+
+    pub fn can_see_all_descendants(&self) -> bool {
+        use ChannelRole::*;
+        match self {
+            Admin | Member => true,
+            Guest | Banned => false,
+        }
+    }
+
+    pub fn can_only_see_public_descendants(&self) -> bool {
+        use ChannelRole::*;
+        match self {
+            Guest => true,
+            Admin | Member | Banned => false,
+        }
+    }
+}
+
+impl From<proto::ChannelRole> for ChannelRole {
+    fn from(value: proto::ChannelRole) -> Self {
+        match value {
+            proto::ChannelRole::Admin => ChannelRole::Admin,
+            proto::ChannelRole::Member => ChannelRole::Member,
+            proto::ChannelRole::Guest => ChannelRole::Guest,
+            proto::ChannelRole::Banned => ChannelRole::Banned,
+        }
+    }
+}
+
+impl Into<proto::ChannelRole> for ChannelRole {
+    fn into(self) -> proto::ChannelRole {
+        match self {
+            ChannelRole::Admin => proto::ChannelRole::Admin,
+            ChannelRole::Member => proto::ChannelRole::Member,
+            ChannelRole::Guest => proto::ChannelRole::Guest,
+            ChannelRole::Banned => proto::ChannelRole::Banned,
+        }
+    }
+}
+
+impl Into<i32> for ChannelRole {
+    fn into(self) -> i32 {
+        let proto: proto::ChannelRole = self.into();
+        proto.into()
+    }
+}
+
+#[derive(Eq, PartialEq, Copy, Clone, Debug, EnumIter, DeriveActiveEnum, Default, Hash)]
+#[sea_orm(rs_type = "String", db_type = "String(None)")]
+pub enum ChannelVisibility {
+    #[sea_orm(string_value = "public")]
+    Public,
+    #[sea_orm(string_value = "members")]
+    #[default]
+    Members,
+}
+
+impl From<proto::ChannelVisibility> for ChannelVisibility {
+    fn from(value: proto::ChannelVisibility) -> Self {
+        match value {
+            proto::ChannelVisibility::Public => ChannelVisibility::Public,
+            proto::ChannelVisibility::Members => ChannelVisibility::Members,
+        }
+    }
+}
+
+impl Into<proto::ChannelVisibility> for ChannelVisibility {
+    fn into(self) -> proto::ChannelVisibility {
+        match self {
+            ChannelVisibility::Public => proto::ChannelVisibility::Public,
+            ChannelVisibility::Members => proto::ChannelVisibility::Members,
+        }
+    }
+}
+
+impl Into<i32> for ChannelVisibility {
+    fn into(self) -> i32 {
+        let proto: proto::ChannelVisibility = self.into();
+        proto.into()
+    }
+}

crates/collab2/collab/src/db/queries.rs

@@ -0,0 +1,12 @@
+use super::*;
+
+pub mod access_tokens;
+pub mod buffers;
+pub mod channels;
+pub mod contacts;
+pub mod messages;
+pub mod notifications;
+pub mod projects;
+pub mod rooms;
+pub mod servers;
+pub mod users;

crates/collab2/collab/src/db/queries/access_tokens.rs

@@ -0,0 +1,54 @@
+use super::*;
+use sea_orm::sea_query::Query;
+
+impl Database {
+    pub async fn create_access_token(
+        &self,
+        user_id: UserId,
+        access_token_hash: &str,
+        max_access_token_count: usize,
+    ) -> Result<AccessTokenId> {
+        self.transaction(|tx| async {
+            let tx = tx;
+
+            let token = access_token::ActiveModel {
+                user_id: ActiveValue::set(user_id),
+                hash: ActiveValue::set(access_token_hash.into()),
+                ..Default::default()
+            }
+            .insert(&*tx)
+            .await?;
+
+            access_token::Entity::delete_many()
+                .filter(
+                    access_token::Column::Id.in_subquery(
+                        Query::select()
+                            .column(access_token::Column::Id)
+                            .from(access_token::Entity)
+                            .and_where(access_token::Column::UserId.eq(user_id))
+                            .order_by(access_token::Column::Id, sea_orm::Order::Desc)
+                            .limit(10000)
+                            .offset(max_access_token_count as u64)
+                            .to_owned(),
+                    ),
+                )
+                .exec(&*tx)
+                .await?;
+            Ok(token.id)
+        })
+        .await
+    }
+
+    pub async fn get_access_token(
+        &self,
+        access_token_id: AccessTokenId,
+    ) -> Result<access_token::Model> {
+        self.transaction(|tx| async move {
+            Ok(access_token::Entity::find_by_id(access_token_id)
+                .one(&*tx)
+                .await?
+                .ok_or_else(|| anyhow!("no such access token"))?)
+        })
+        .await
+    }
+}

crates/collab2/collab/src/db/queries/contacts.rs

@@ -0,0 +1,353 @@
+use super::*;
+
+impl Database {
+    pub async fn get_contacts(&self, user_id: UserId) -> Result<Vec<Contact>> {
+        #[derive(Debug, FromQueryResult)]
+        struct ContactWithUserBusyStatuses {
+            user_id_a: UserId,
+            user_id_b: UserId,
+            a_to_b: bool,
+            accepted: bool,
+            user_a_busy: bool,
+            user_b_busy: bool,
+        }
+
+        self.transaction(|tx| async move {
+            let user_a_participant = Alias::new("user_a_participant");
+            let user_b_participant = Alias::new("user_b_participant");
+            let mut db_contacts = contact::Entity::find()
+                .column_as(
+                    Expr::col((user_a_participant.clone(), room_participant::Column::Id))
+                        .is_not_null(),
+                    "user_a_busy",
+                )
+                .column_as(
+                    Expr::col((user_b_participant.clone(), room_participant::Column::Id))
+                        .is_not_null(),
+                    "user_b_busy",
+                )
+                .filter(
+                    contact::Column::UserIdA
+                        .eq(user_id)
+                        .or(contact::Column::UserIdB.eq(user_id)),
+                )
+                .join_as(
+                    JoinType::LeftJoin,
+                    contact::Relation::UserARoomParticipant.def(),
+                    user_a_participant,
+                )
+                .join_as(
+                    JoinType::LeftJoin,
+                    contact::Relation::UserBRoomParticipant.def(),
+                    user_b_participant,
+                )
+                .into_model::<ContactWithUserBusyStatuses>()
+                .stream(&*tx)
+                .await?;
+
+            let mut contacts = Vec::new();
+            while let Some(db_contact) = db_contacts.next().await {
+                let db_contact = db_contact?;
+                if db_contact.user_id_a == user_id {
+                    if db_contact.accepted {
+                        contacts.push(Contact::Accepted {
+                            user_id: db_contact.user_id_b,
+                            busy: db_contact.user_b_busy,
+                        });
+                    } else if db_contact.a_to_b {
+                        contacts.push(Contact::Outgoing {
+                            user_id: db_contact.user_id_b,
+                        })
+                    } else {
+                        contacts.push(Contact::Incoming {
+                            user_id: db_contact.user_id_b,
+                        });
+                    }
+                } else if db_contact.accepted {
+                    contacts.push(Contact::Accepted {
+                        user_id: db_contact.user_id_a,
+                        busy: db_contact.user_a_busy,
+                    });
+                } else if db_contact.a_to_b {
+                    contacts.push(Contact::Incoming {
+                        user_id: db_contact.user_id_a,
+                    });
+                } else {
+                    contacts.push(Contact::Outgoing {
+                        user_id: db_contact.user_id_a,
+                    });
+                }
+            }
+
+            contacts.sort_unstable_by_key(|contact| contact.user_id());
+
+            Ok(contacts)
+        })
+        .await
+    }
+
+    pub async fn is_user_busy(&self, user_id: UserId) -> Result<bool> {
+        self.transaction(|tx| async move {
+            let participant = room_participant::Entity::find()
+                .filter(room_participant::Column::UserId.eq(user_id))
+                .one(&*tx)
+                .await?;
+            Ok(participant.is_some())
+        })
+        .await
+    }
+
+    pub async fn has_contact(&self, user_id_1: UserId, user_id_2: UserId) -> Result<bool> {
+        self.transaction(|tx| async move {
+            let (id_a, id_b) = if user_id_1 < user_id_2 {
+                (user_id_1, user_id_2)
+            } else {
+                (user_id_2, user_id_1)
+            };
+
+            Ok(contact::Entity::find()
+                .filter(
+                    contact::Column::UserIdA
+                        .eq(id_a)
+                        .and(contact::Column::UserIdB.eq(id_b))
+                        .and(contact::Column::Accepted.eq(true)),
+                )
+                .one(&*tx)
+                .await?
+                .is_some())
+        })
+        .await
+    }
+
+    pub async fn send_contact_request(
+        &self,
+        sender_id: UserId,
+        receiver_id: UserId,
+    ) -> Result<NotificationBatch> {
+        self.transaction(|tx| async move {
+            let (id_a, id_b, a_to_b) = if sender_id < receiver_id {
+                (sender_id, receiver_id, true)
+            } else {
+                (receiver_id, sender_id, false)
+            };
+
+            let rows_affected = contact::Entity::insert(contact::ActiveModel {
+                user_id_a: ActiveValue::set(id_a),
+                user_id_b: ActiveValue::set(id_b),
+                a_to_b: ActiveValue::set(a_to_b),
+                accepted: ActiveValue::set(false),
+                should_notify: ActiveValue::set(true),
+                ..Default::default()
+            })
+            .on_conflict(
+                OnConflict::columns([contact::Column::UserIdA, contact::Column::UserIdB])
+                    .values([
+                        (contact::Column::Accepted, true.into()),
+                        (contact::Column::ShouldNotify, false.into()),
+                    ])
+                    .action_and_where(
+                        contact::Column::Accepted.eq(false).and(
+                            contact::Column::AToB
+                                .eq(a_to_b)
+                                .and(contact::Column::UserIdA.eq(id_b))
+                                .or(contact::Column::AToB
+                                    .ne(a_to_b)
+                                    .and(contact::Column::UserIdA.eq(id_a))),
+                        ),
+                    )
+                    .to_owned(),
+            )
+            .exec_without_returning(&*tx)
+            .await?;
+
+            if rows_affected == 0 {
+                Err(anyhow!("contact already requested"))?;
+            }
+
+            Ok(self
+                .create_notification(
+                    receiver_id,
+                    rpc::Notification::ContactRequest {
+                        sender_id: sender_id.to_proto(),
+                    },
+                    true,
+                    &*tx,
+                )
+                .await?
+                .into_iter()
+                .collect())
+        })
+        .await
+    }
+
+    /// Returns a bool indicating whether the removed contact had originally accepted or not
+    ///
+    /// Deletes the contact identified by the requester and responder ids, and then returns
+    /// whether the deleted contact had originally accepted or was a pending contact request.
+    ///
+    /// # Arguments
+    ///
+    /// * `requester_id` - The user that initiates this request
+    /// * `responder_id` - The user that will be removed
+    pub async fn remove_contact(
+        &self,
+        requester_id: UserId,
+        responder_id: UserId,
+    ) -> Result<(bool, Option<NotificationId>)> {
+        self.transaction(|tx| async move {
+            let (id_a, id_b) = if responder_id < requester_id {
+                (responder_id, requester_id)
+            } else {
+                (requester_id, responder_id)
+            };
+
+            let contact = contact::Entity::find()
+                .filter(
+                    contact::Column::UserIdA
+                        .eq(id_a)
+                        .and(contact::Column::UserIdB.eq(id_b)),
+                )
+                .one(&*tx)
+                .await?
+                .ok_or_else(|| anyhow!("no such contact"))?;
+
+            contact::Entity::delete_by_id(contact.id).exec(&*tx).await?;
+
+            let mut deleted_notification_id = None;
+            if !contact.accepted {
+                deleted_notification_id = self
+                    .remove_notification(
+                        responder_id,
+                        rpc::Notification::ContactRequest {
+                            sender_id: requester_id.to_proto(),
+                        },
+                        &*tx,
+                    )
+                    .await?;
+            }
+
+            Ok((contact.accepted, deleted_notification_id))
+        })
+        .await
+    }
+
+    pub async fn dismiss_contact_notification(
+        &self,
+        user_id: UserId,
+        contact_user_id: UserId,
+    ) -> Result<()> {
+        self.transaction(|tx| async move {
+            let (id_a, id_b, a_to_b) = if user_id < contact_user_id {
+                (user_id, contact_user_id, true)
+            } else {
+                (contact_user_id, user_id, false)
+            };
+
+            let result = contact::Entity::update_many()
+                .set(contact::ActiveModel {
+                    should_notify: ActiveValue::set(false),
+                    ..Default::default()
+                })
+                .filter(
+                    contact::Column::UserIdA
+                        .eq(id_a)
+                        .and(contact::Column::UserIdB.eq(id_b))
+                        .and(
+                            contact::Column::AToB
+                                .eq(a_to_b)
+                                .and(contact::Column::Accepted.eq(true))
+                                .or(contact::Column::AToB
+                                    .ne(a_to_b)
+                                    .and(contact::Column::Accepted.eq(false))),
+                        ),
+                )
+                .exec(&*tx)
+                .await?;
+            if result.rows_affected == 0 {
+                Err(anyhow!("no such contact request"))?
+            } else {
+                Ok(())
+            }
+        })
+        .await
+    }
+
+    pub async fn respond_to_contact_request(
+        &self,
+        responder_id: UserId,
+        requester_id: UserId,
+        accept: bool,
+    ) -> Result<NotificationBatch> {
+        self.transaction(|tx| async move {
+            let (id_a, id_b, a_to_b) = if responder_id < requester_id {
+                (responder_id, requester_id, false)
+            } else {
+                (requester_id, responder_id, true)
+            };
+            let rows_affected = if accept {
+                let result = contact::Entity::update_many()
+                    .set(contact::ActiveModel {
+                        accepted: ActiveValue::set(true),
+                        should_notify: ActiveValue::set(true),
+                        ..Default::default()
+                    })
+                    .filter(
+                        contact::Column::UserIdA
+                            .eq(id_a)
+                            .and(contact::Column::UserIdB.eq(id_b))
+                            .and(contact::Column::AToB.eq(a_to_b)),
+                    )
+                    .exec(&*tx)
+                    .await?;
+                result.rows_affected
+            } else {
+                let result = contact::Entity::delete_many()
+                    .filter(
+                        contact::Column::UserIdA
+                            .eq(id_a)
+                            .and(contact::Column::UserIdB.eq(id_b))
+                            .and(contact::Column::AToB.eq(a_to_b))
+                            .and(contact::Column::Accepted.eq(false)),
+                    )
+                    .exec(&*tx)
+                    .await?;
+
+                result.rows_affected
+            };
+
+            if rows_affected == 0 {
+                Err(anyhow!("no such contact request"))?
+            }
+
+            let mut notifications = Vec::new();
+            notifications.extend(
+                self.mark_notification_as_read_with_response(
+                    responder_id,
+                    &rpc::Notification::ContactRequest {
+                        sender_id: requester_id.to_proto(),
+                    },
+                    accept,
+                    &*tx,
+                )
+                .await?,
+            );
+
+            if accept {
+                notifications.extend(
+                    self.create_notification(
+                        requester_id,
+                        rpc::Notification::ContactRequestAccepted {
+                            responder_id: responder_id.to_proto(),
+                        },
+                        true,
+                        &*tx,
+                    )
+                    .await?,
+                );
+            }
+
+            Ok(notifications)
+        })
+        .await
+    }
+}

crates/collab2/collab/src/db/queries/messages.rs

@@ -0,0 +1,505 @@
+use super::*;
+use rpc::Notification;
+use sea_orm::TryInsertResult;
+use time::OffsetDateTime;
+
+impl Database {
+    pub async fn join_channel_chat(
+        &self,
+        channel_id: ChannelId,
+        connection_id: ConnectionId,
+        user_id: UserId,
+    ) -> Result<()> {
+        self.transaction(|tx| async move {
+            let channel = self.get_channel_internal(channel_id, &*tx).await?;
+            self.check_user_is_channel_participant(&channel, user_id, &*tx)
+                .await?;
+            channel_chat_participant::ActiveModel {
+                id: ActiveValue::NotSet,
+                channel_id: ActiveValue::Set(channel_id),
+                user_id: ActiveValue::Set(user_id),
+                connection_id: ActiveValue::Set(connection_id.id as i32),
+                connection_server_id: ActiveValue::Set(ServerId(connection_id.owner_id as i32)),
+            }
+            .insert(&*tx)
+            .await?;
+            Ok(())
+        })
+        .await
+    }
+
+    pub async fn channel_chat_connection_lost(
+        &self,
+        connection_id: ConnectionId,
+        tx: &DatabaseTransaction,
+    ) -> Result<()> {
+        channel_chat_participant::Entity::delete_many()
+            .filter(
+                Condition::all()
+                    .add(
+                        channel_chat_participant::Column::ConnectionServerId
+                            .eq(connection_id.owner_id),
+                    )
+                    .add(channel_chat_participant::Column::ConnectionId.eq(connection_id.id)),
+            )
+            .exec(tx)
+            .await?;
+        Ok(())
+    }
+
+    pub async fn leave_channel_chat(
+        &self,
+        channel_id: ChannelId,
+        connection_id: ConnectionId,
+        _user_id: UserId,
+    ) -> Result<()> {
+        self.transaction(|tx| async move {
+            channel_chat_participant::Entity::delete_many()
+                .filter(
+                    Condition::all()
+                        .add(
+                            channel_chat_participant::Column::ConnectionServerId
+                                .eq(connection_id.owner_id),
+                        )
+                        .add(channel_chat_participant::Column::ConnectionId.eq(connection_id.id))
+                        .add(channel_chat_participant::Column::ChannelId.eq(channel_id)),
+                )
+                .exec(&*tx)
+                .await?;
+
+            Ok(())
+        })
+        .await
+    }
+
+    pub async fn get_channel_messages(
+        &self,
+        channel_id: ChannelId,
+        user_id: UserId,
+        count: usize,
+        before_message_id: Option<MessageId>,
+    ) -> Result<Vec<proto::ChannelMessage>> {
+        self.transaction(|tx| async move {
+            let channel = self.get_channel_internal(channel_id, &*tx).await?;
+            self.check_user_is_channel_participant(&channel, user_id, &*tx)
+                .await?;
+
+            let mut condition =
+                Condition::all().add(channel_message::Column::ChannelId.eq(channel_id));
+
+            if let Some(before_message_id) = before_message_id {
+                condition = condition.add(channel_message::Column::Id.lt(before_message_id));
+            }
+
+            let rows = channel_message::Entity::find()
+                .filter(condition)
+                .order_by_desc(channel_message::Column::Id)
+                .limit(count as u64)
+                .all(&*tx)
+                .await?;
+
+            self.load_channel_messages(rows, &*tx).await
+        })
+        .await
+    }
+
+    pub async fn get_channel_messages_by_id(
+        &self,
+        user_id: UserId,
+        message_ids: &[MessageId],
+    ) -> Result<Vec<proto::ChannelMessage>> {
+        self.transaction(|tx| async move {
+            let rows = channel_message::Entity::find()
+                .filter(channel_message::Column::Id.is_in(message_ids.iter().copied()))
+                .order_by_desc(channel_message::Column::Id)
+                .all(&*tx)
+                .await?;
+
+            let mut channels = HashMap::<ChannelId, channel::Model>::default();
+            for row in &rows {
+                channels.insert(
+                    row.channel_id,
+                    self.get_channel_internal(row.channel_id, &*tx).await?,
+                );
+            }
+
+            for (_, channel) in channels {
+                self.check_user_is_channel_participant(&channel, user_id, &*tx)
+                    .await?;
+            }
+
+            let messages = self.load_channel_messages(rows, &*tx).await?;
+            Ok(messages)
+        })
+        .await
+    }
+
+    async fn load_channel_messages(
+        &self,
+        rows: Vec<channel_message::Model>,
+        tx: &DatabaseTransaction,
+    ) -> Result<Vec<proto::ChannelMessage>> {
+        let mut messages = rows
+            .into_iter()
+            .map(|row| {
+                let nonce = row.nonce.as_u64_pair();
+                proto::ChannelMessage {
+                    id: row.id.to_proto(),
+                    sender_id: row.sender_id.to_proto(),
+                    body: row.body,
+                    timestamp: row.sent_at.assume_utc().unix_timestamp() as u64,
+                    mentions: vec![],
+                    nonce: Some(proto::Nonce {
+                        upper_half: nonce.0,
+                        lower_half: nonce.1,
+                    }),
+                }
+            })
+            .collect::<Vec<_>>();
+        messages.reverse();
+
+        let mut mentions = channel_message_mention::Entity::find()
+            .filter(channel_message_mention::Column::MessageId.is_in(messages.iter().map(|m| m.id)))
+            .order_by_asc(channel_message_mention::Column::MessageId)
+            .order_by_asc(channel_message_mention::Column::StartOffset)
+            .stream(&*tx)
+            .await?;
+
+        let mut message_ix = 0;
+        while let Some(mention) = mentions.next().await {
+            let mention = mention?;
+            let message_id = mention.message_id.to_proto();
+            while let Some(message) = messages.get_mut(message_ix) {
+                if message.id < message_id {
+                    message_ix += 1;
+                } else {
+                    if message.id == message_id {
+                        message.mentions.push(proto::ChatMention {
+                            range: Some(proto::Range {
+                                start: mention.start_offset as u64,
+                                end: mention.end_offset as u64,
+                            }),
+                            user_id: mention.user_id.to_proto(),
+                        });
+                    }
+                    break;
+                }
+            }
+        }
+
+        Ok(messages)
+    }
+
+    pub async fn create_channel_message(
+        &self,
+        channel_id: ChannelId,
+        user_id: UserId,
+        body: &str,
+        mentions: &[proto::ChatMention],
+        timestamp: OffsetDateTime,
+        nonce: u128,
+    ) -> Result<CreatedChannelMessage> {
+        self.transaction(|tx| async move {
+            let channel = self.get_channel_internal(channel_id, &*tx).await?;
+            self.check_user_is_channel_participant(&channel, user_id, &*tx)
+                .await?;
+
+            let mut rows = channel_chat_participant::Entity::find()
+                .filter(channel_chat_participant::Column::ChannelId.eq(channel_id))
+                .stream(&*tx)
+                .await?;
+
+            let mut is_participant = false;
+            let mut participant_connection_ids = Vec::new();
+            let mut participant_user_ids = Vec::new();
+            while let Some(row) = rows.next().await {
+                let row = row?;
+                if row.user_id == user_id {
+                    is_participant = true;
+                }
+                participant_user_ids.push(row.user_id);
+                participant_connection_ids.push(row.connection());
+            }
+            drop(rows);
+
+            if !is_participant {
+                Err(anyhow!("not a chat participant"))?;
+            }
+
+            let timestamp = timestamp.to_offset(time::UtcOffset::UTC);
+            let timestamp = time::PrimitiveDateTime::new(timestamp.date(), timestamp.time());
+
+            let result = channel_message::Entity::insert(channel_message::ActiveModel {
+                channel_id: ActiveValue::Set(channel_id),
+                sender_id: ActiveValue::Set(user_id),
+                body: ActiveValue::Set(body.to_string()),
+                sent_at: ActiveValue::Set(timestamp),
+                nonce: ActiveValue::Set(Uuid::from_u128(nonce)),
+                id: ActiveValue::NotSet,
+            })
+            .on_conflict(
+                OnConflict::columns([
+                    channel_message::Column::SenderId,
+                    channel_message::Column::Nonce,
+                ])
+                .do_nothing()
+                .to_owned(),
+            )
+            .do_nothing()
+            .exec(&*tx)
+            .await?;
+
+            let message_id;
+            let mut notifications = Vec::new();
+            match result {
+                TryInsertResult::Inserted(result) => {
+                    message_id = result.last_insert_id;
+                    let mentioned_user_ids =
+                        mentions.iter().map(|m| m.user_id).collect::<HashSet<_>>();
+                    let mentions = mentions
+                        .iter()
+                        .filter_map(|mention| {
+                            let range = mention.range.as_ref()?;
+                            if !body.is_char_boundary(range.start as usize)
+                                || !body.is_char_boundary(range.end as usize)
+                            {
+                                return None;
+                            }
+                            Some(channel_message_mention::ActiveModel {
+                                message_id: ActiveValue::Set(message_id),
+                                start_offset: ActiveValue::Set(range.start as i32),
+                                end_offset: ActiveValue::Set(range.end as i32),
+                                user_id: ActiveValue::Set(UserId::from_proto(mention.user_id)),
+                            })
+                        })
+                        .collect::<Vec<_>>();
+                    if !mentions.is_empty() {
+                        channel_message_mention::Entity::insert_many(mentions)
+                            .exec(&*tx)
+                            .await?;
+                    }
+
+                    for mentioned_user in mentioned_user_ids {
+                        notifications.extend(
+                            self.create_notification(
+                                UserId::from_proto(mentioned_user),
+                                rpc::Notification::ChannelMessageMention {
+                                    message_id: message_id.to_proto(),
+                                    sender_id: user_id.to_proto(),
+                                    channel_id: channel_id.to_proto(),
+                                },
+                                false,
+                                &*tx,
+                            )
+                            .await?,
+                        );
+                    }
+
+                    self.observe_channel_message_internal(channel_id, user_id, message_id, &*tx)
+                        .await?;
+                }
+                _ => {
+                    message_id = channel_message::Entity::find()
+                        .filter(channel_message::Column::Nonce.eq(Uuid::from_u128(nonce)))
+                        .one(&*tx)
+                        .await?
+                        .ok_or_else(|| anyhow!("failed to insert message"))?
+                        .id;
+                }
+            }
+
+            let mut channel_members = self.get_channel_participants(&channel, &*tx).await?;
+            channel_members.retain(|member| !participant_user_ids.contains(member));
+
+            Ok(CreatedChannelMessage {
+                message_id,
+                participant_connection_ids,
+                channel_members,
+                notifications,
+            })
+        })
+        .await
+    }
+
+    pub async fn observe_channel_message(
+        &self,
+        channel_id: ChannelId,
+        user_id: UserId,
+        message_id: MessageId,
+    ) -> Result<NotificationBatch> {
+        self.transaction(|tx| async move {
+            self.observe_channel_message_internal(channel_id, user_id, message_id, &*tx)
+                .await?;
+            let mut batch = NotificationBatch::default();
+            batch.extend(
+                self.mark_notification_as_read(
+                    user_id,
+                    &Notification::ChannelMessageMention {
+                        message_id: message_id.to_proto(),
+                        sender_id: Default::default(),
+                        channel_id: Default::default(),
+                    },
+                    &*tx,
+                )
+                .await?,
+            );
+            Ok(batch)
+        })
+        .await
+    }
+
+    async fn observe_channel_message_internal(
+        &self,
+        channel_id: ChannelId,
+        user_id: UserId,
+        message_id: MessageId,
+        tx: &DatabaseTransaction,
+    ) -> Result<()> {
+        observed_channel_messages::Entity::insert(observed_channel_messages::ActiveModel {
+            user_id: ActiveValue::Set(user_id),
+            channel_id: ActiveValue::Set(channel_id),
+            channel_message_id: ActiveValue::Set(message_id),
+        })
+        .on_conflict(
+            OnConflict::columns([
+                observed_channel_messages::Column::ChannelId,
+                observed_channel_messages::Column::UserId,
+            ])
+            .update_column(observed_channel_messages::Column::ChannelMessageId)
+            .action_cond_where(observed_channel_messages::Column::ChannelMessageId.lt(message_id))
+            .to_owned(),
+        )
+        // TODO: Try to upgrade SeaORM so we don't have to do this hack around their bug
+        .exec_without_returning(&*tx)
+        .await?;
+        Ok(())
+    }
+
+    pub async fn unseen_channel_messages(
+        &self,
+        user_id: UserId,
+        channel_ids: &[ChannelId],
+        tx: &DatabaseTransaction,
+    ) -> Result<Vec<proto::UnseenChannelMessage>> {
+        let mut observed_messages_by_channel_id = HashMap::default();
+        let mut rows = observed_channel_messages::Entity::find()
+            .filter(observed_channel_messages::Column::UserId.eq(user_id))
+            .filter(observed_channel_messages::Column::ChannelId.is_in(channel_ids.iter().copied()))
+            .stream(&*tx)
+            .await?;
+
+        while let Some(row) = rows.next().await {
+            let row = row?;
+            observed_messages_by_channel_id.insert(row.channel_id, row);
+        }
+        drop(rows);
+        let mut values = String::new();
+        for id in channel_ids {
+            if !values.is_empty() {
+                values.push_str(", ");
+            }
+            write!(&mut values, "({})", id).unwrap();
+        }
+
+        if values.is_empty() {
+            return Ok(Default::default());
+        }
+
+        let sql = format!(
+            r#"
+            SELECT
+                *
+            FROM (
+                SELECT
+                    *,
+                    row_number() OVER (
+                        PARTITION BY channel_id
+                        ORDER BY id DESC
+                    ) as row_number
+                FROM channel_messages
+                WHERE
+                    channel_id in ({values})
+            ) AS messages
+            WHERE
+                row_number = 1
+            "#,
+        );
+
+        let stmt = Statement::from_string(self.pool.get_database_backend(), sql);
+        let last_messages = channel_message::Model::find_by_statement(stmt)
+            .all(&*tx)
+            .await?;
+
+        let mut changes = Vec::new();
+        for last_message in last_messages {
+            if let Some(observed_message) =
+                observed_messages_by_channel_id.get(&last_message.channel_id)
+            {
+                if observed_message.channel_message_id == last_message.id {
+                    continue;
+                }
+            }
+            changes.push(proto::UnseenChannelMessage {
+                channel_id: last_message.channel_id.to_proto(),
+                message_id: last_message.id.to_proto(),
+            });
+        }
+
+        Ok(changes)
+    }
+
+    pub async fn remove_channel_message(
+        &self,
+        channel_id: ChannelId,
+        message_id: MessageId,
+        user_id: UserId,
+    ) -> Result<Vec<ConnectionId>> {
+        self.transaction(|tx| async move {
+            let mut rows = channel_chat_participant::Entity::find()
+                .filter(channel_chat_participant::Column::ChannelId.eq(channel_id))
+                .stream(&*tx)
+                .await?;
+
+            let mut is_participant = false;
+            let mut participant_connection_ids = Vec::new();
+            while let Some(row) = rows.next().await {
+                let row = row?;
+                if row.user_id == user_id {
+                    is_participant = true;
+                }
+                participant_connection_ids.push(row.connection());
+            }
+            drop(rows);
+
+            if !is_participant {
+                Err(anyhow!("not a chat participant"))?;
+            }
+
+            let result = channel_message::Entity::delete_by_id(message_id)
+                .filter(channel_message::Column::SenderId.eq(user_id))
+                .exec(&*tx)
+                .await?;
+
+            if result.rows_affected == 0 {
+                let channel = self.get_channel_internal(channel_id, &*tx).await?;
+                if self
+                    .check_user_is_channel_admin(&channel, user_id, &*tx)
+                    .await
+                    .is_ok()
+                {
+                    let result = channel_message::Entity::delete_by_id(message_id)
+                        .exec(&*tx)
+                        .await?;
+                    if result.rows_affected == 0 {
+                        Err(anyhow!("no such message"))?;
+                    }
+                } else {
+                    Err(anyhow!("operation could not be completed"))?;
+                }
+            }
+
+            Ok(participant_connection_ids)
+        })
+        .await
+    }
+}

crates/collab2/collab/src/db/queries/notifications.rs

@@ -0,0 +1,262 @@
+use super::*;
+use rpc::Notification;
+
+impl Database {
+    pub async fn initialize_notification_kinds(&mut self) -> Result<()> {
+        notification_kind::Entity::insert_many(Notification::all_variant_names().iter().map(
+            |kind| notification_kind::ActiveModel {
+                name: ActiveValue::Set(kind.to_string()),
+                ..Default::default()
+            },
+        ))
+        .on_conflict(OnConflict::new().do_nothing().to_owned())
+        .exec_without_returning(&self.pool)
+        .await?;
+
+        let mut rows = notification_kind::Entity::find().stream(&self.pool).await?;
+        while let Some(row) = rows.next().await {
+            let row = row?;
+            self.notification_kinds_by_name.insert(row.name, row.id);
+        }
+
+        for name in Notification::all_variant_names() {
+            if let Some(id) = self.notification_kinds_by_name.get(*name).copied() {
+                self.notification_kinds_by_id.insert(id, name);
+            }
+        }
+
+        Ok(())
+    }
+
+    pub async fn get_notifications(
+        &self,
+        recipient_id: UserId,
+        limit: usize,
+        before_id: Option<NotificationId>,
+    ) -> Result<Vec<proto::Notification>> {
+        self.transaction(|tx| async move {
+            let mut result = Vec::new();
+            let mut condition =
+                Condition::all().add(notification::Column::RecipientId.eq(recipient_id));
+
+            if let Some(before_id) = before_id {
+                condition = condition.add(notification::Column::Id.lt(before_id));
+            }
+
+            let mut rows = notification::Entity::find()
+                .filter(condition)
+                .order_by_desc(notification::Column::Id)
+                .limit(limit as u64)
+                .stream(&*tx)
+                .await?;
+            while let Some(row) = rows.next().await {
+                let row = row?;
+                let kind = row.kind;
+                if let Some(proto) = model_to_proto(self, row) {
+                    result.push(proto);
+                } else {
+                    log::warn!("unknown notification kind {:?}", kind);
+                }
+            }
+            result.reverse();
+            Ok(result)
+        })
+        .await
+    }
+
+    /// Create a notification. If `avoid_duplicates` is set to true, then avoid
+    /// creating a new notification if the given recipient already has an
+    /// unread notification with the given kind and entity id.
+    pub async fn create_notification(
+        &self,
+        recipient_id: UserId,
+        notification: Notification,
+        avoid_duplicates: bool,
+        tx: &DatabaseTransaction,
+    ) -> Result<Option<(UserId, proto::Notification)>> {
+        if avoid_duplicates {
+            if self
+                .find_notification(recipient_id, &notification, tx)
+                .await?
+                .is_some()
+            {
+                return Ok(None);
+            }
+        }
+
+        let proto = notification.to_proto();
+        let kind = notification_kind_from_proto(self, &proto)?;
+        let model = notification::ActiveModel {
+            recipient_id: ActiveValue::Set(recipient_id),
+            kind: ActiveValue::Set(kind),
+            entity_id: ActiveValue::Set(proto.entity_id.map(|id| id as i32)),
+            content: ActiveValue::Set(proto.content.clone()),
+            ..Default::default()
+        }
+        .save(&*tx)
+        .await?;
+
+        Ok(Some((
+            recipient_id,
+            proto::Notification {
+                id: model.id.as_ref().to_proto(),
+                kind: proto.kind,
+                timestamp: model.created_at.as_ref().assume_utc().unix_timestamp() as u64,
+                is_read: false,
+                response: None,
+                content: proto.content,
+                entity_id: proto.entity_id,
+            },
+        )))
+    }
+
+    /// Remove an unread notification with the given recipient, kind and
+    /// entity id.
+    pub async fn remove_notification(
+        &self,
+        recipient_id: UserId,
+        notification: Notification,
+        tx: &DatabaseTransaction,
+    ) -> Result<Option<NotificationId>> {
+        let id = self
+            .find_notification(recipient_id, &notification, tx)
+            .await?;
+        if let Some(id) = id {
+            notification::Entity::delete_by_id(id).exec(tx).await?;
+        }
+        Ok(id)
+    }
+
+    /// Populate the response for the notification with the given kind and
+    /// entity id.
+    pub async fn mark_notification_as_read_with_response(
+        &self,
+        recipient_id: UserId,
+        notification: &Notification,
+        response: bool,
+        tx: &DatabaseTransaction,
+    ) -> Result<Option<(UserId, proto::Notification)>> {
+        self.mark_notification_as_read_internal(recipient_id, notification, Some(response), tx)
+            .await
+    }
+
+    pub async fn mark_notification_as_read(
+        &self,
+        recipient_id: UserId,
+        notification: &Notification,
+        tx: &DatabaseTransaction,
+    ) -> Result<Option<(UserId, proto::Notification)>> {
+        self.mark_notification_as_read_internal(recipient_id, notification, None, tx)
+            .await
+    }
+
+    pub async fn mark_notification_as_read_by_id(
+        &self,
+        recipient_id: UserId,
+        notification_id: NotificationId,
+    ) -> Result<NotificationBatch> {
+        self.transaction(|tx| async move {
+            let row = notification::Entity::update(notification::ActiveModel {
+                id: ActiveValue::Unchanged(notification_id),
+                recipient_id: ActiveValue::Unchanged(recipient_id),
+                is_read: ActiveValue::Set(true),
+                ..Default::default()
+            })
+            .exec(&*tx)
+            .await?;
+            Ok(model_to_proto(self, row)
+                .map(|notification| (recipient_id, notification))
+                .into_iter()
+                .collect())
+        })
+        .await
+    }
+
+    async fn mark_notification_as_read_internal(
+        &self,
+        recipient_id: UserId,
+        notification: &Notification,
+        response: Option<bool>,
+        tx: &DatabaseTransaction,
+    ) -> Result<Option<(UserId, proto::Notification)>> {
+        if let Some(id) = self
+            .find_notification(recipient_id, notification, &*tx)
+            .await?
+        {
+            let row = notification::Entity::update(notification::ActiveModel {
+                id: ActiveValue::Unchanged(id),
+                recipient_id: ActiveValue::Unchanged(recipient_id),
+                is_read: ActiveValue::Set(true),
+                response: if let Some(response) = response {
+                    ActiveValue::Set(Some(response))
+                } else {
+                    ActiveValue::NotSet
+                },
+                ..Default::default()
+            })
+            .exec(tx)
+            .await?;
+            Ok(model_to_proto(self, row).map(|notification| (recipient_id, notification)))
+        } else {
+            Ok(None)
+        }
+    }
+
+    /// Find an unread notification by its recipient, kind and entity id.
+    async fn find_notification(
+        &self,
+        recipient_id: UserId,
+        notification: &Notification,
+        tx: &DatabaseTransaction,
+    ) -> Result<Option<NotificationId>> {
+        let proto = notification.to_proto();
+        let kind = notification_kind_from_proto(self, &proto)?;
+
+        #[derive(Copy, Clone, Debug, EnumIter, DeriveColumn)]
+        enum QueryIds {
+            Id,
+        }
+
+        Ok(notification::Entity::find()
+            .select_only()
+            .column(notification::Column::Id)
+            .filter(
+                Condition::all()
+                    .add(notification::Column::RecipientId.eq(recipient_id))
+                    .add(notification::Column::IsRead.eq(false))
+                    .add(notification::Column::Kind.eq(kind))
+                    .add(if proto.entity_id.is_some() {
+                        notification::Column::EntityId.eq(proto.entity_id)
+                    } else {
+                        notification::Column::EntityId.is_null()
+                    }),
+            )
+            .into_values::<_, QueryIds>()
+            .one(&*tx)
+            .await?)
+    }
+}
+
+fn model_to_proto(this: &Database, row: notification::Model) -> Option<proto::Notification> {
+    let kind = this.notification_kinds_by_id.get(&row.kind)?;
+    Some(proto::Notification {
+        id: row.id.to_proto(),
+        kind: kind.to_string(),
+        timestamp: row.created_at.assume_utc().unix_timestamp() as u64,
+        is_read: row.is_read,
+        response: row.response,
+        content: row.content,
+        entity_id: row.entity_id.map(|id| id as u64),
+    })
+}
+
+fn notification_kind_from_proto(
+    this: &Database,
+    proto: &proto::Notification,
+) -> Result<NotificationKindId> {
+    Ok(this
+        .notification_kinds_by_name
+        .get(&proto.kind)
+        .copied()
+        .ok_or_else(|| anyhow!("invalid notification kind {:?}", proto.kind))?)
+}

crates/collab2/collab/src/db/queries/projects.rs

@@ -0,0 +1,960 @@
+use super::*;
+
+impl Database {
+    pub async fn project_count_excluding_admins(&self) -> Result<usize> {
+        #[derive(Copy, Clone, Debug, EnumIter, DeriveColumn)]
+        enum QueryAs {
+            Count,
+        }
+
+        self.transaction(|tx| async move {
+            Ok(project::Entity::find()
+                .select_only()
+                .column_as(project::Column::Id.count(), QueryAs::Count)
+                .inner_join(user::Entity)
+                .filter(user::Column::Admin.eq(false))
+                .into_values::<_, QueryAs>()
+                .one(&*tx)
+                .await?
+                .unwrap_or(0i64) as usize)
+        })
+        .await
+    }
+
+    pub async fn share_project(
+        &self,
+        room_id: RoomId,
+        connection: ConnectionId,
+        worktrees: &[proto::WorktreeMetadata],
+    ) -> Result<RoomGuard<(ProjectId, proto::Room)>> {
+        self.room_transaction(room_id, |tx| async move {
+            let participant = room_participant::Entity::find()
+                .filter(
+                    Condition::all()
+                        .add(
+                            room_participant::Column::AnsweringConnectionId
+                                .eq(connection.id as i32),
+                        )
+                        .add(
+                            room_participant::Column::AnsweringConnectionServerId
+                                .eq(connection.owner_id as i32),
+                        ),
+                )
+                .one(&*tx)
+                .await?
+                .ok_or_else(|| anyhow!("could not find participant"))?;
+            if participant.room_id != room_id {
+                return Err(anyhow!("shared project on unexpected room"))?;
+            }
+
+            let project = project::ActiveModel {
+                room_id: ActiveValue::set(participant.room_id),
+                host_user_id: ActiveValue::set(participant.user_id),
+                host_connection_id: ActiveValue::set(Some(connection.id as i32)),
+                host_connection_server_id: ActiveValue::set(Some(ServerId(
+                    connection.owner_id as i32,
+                ))),
+                ..Default::default()
+            }
+            .insert(&*tx)
+            .await?;
+
+            if !worktrees.is_empty() {
+                worktree::Entity::insert_many(worktrees.iter().map(|worktree| {
+                    worktree::ActiveModel {
+                        id: ActiveValue::set(worktree.id as i64),
+                        project_id: ActiveValue::set(project.id),
+                        abs_path: ActiveValue::set(worktree.abs_path.clone()),
+                        root_name: ActiveValue::set(worktree.root_name.clone()),
+                        visible: ActiveValue::set(worktree.visible),
+                        scan_id: ActiveValue::set(0),
+                        completed_scan_id: ActiveValue::set(0),
+                    }
+                }))
+                .exec(&*tx)
+                .await?;
+            }
+
+            project_collaborator::ActiveModel {
+                project_id: ActiveValue::set(project.id),
+                connection_id: ActiveValue::set(connection.id as i32),
+                connection_server_id: ActiveValue::set(ServerId(connection.owner_id as i32)),
+                user_id: ActiveValue::set(participant.user_id),
+                replica_id: ActiveValue::set(ReplicaId(0)),
+                is_host: ActiveValue::set(true),
+                ..Default::default()
+            }
+            .insert(&*tx)
+            .await?;
+
+            let room = self.get_room(room_id, &tx).await?;
+            Ok((project.id, room))
+        })
+        .await
+    }
+
+    pub async fn unshare_project(
+        &self,
+        project_id: ProjectId,
+        connection: ConnectionId,
+    ) -> Result<RoomGuard<(proto::Room, Vec<ConnectionId>)>> {
+        let room_id = self.room_id_for_project(project_id).await?;
+        self.room_transaction(room_id, |tx| async move {
+            let guest_connection_ids = self.project_guest_connection_ids(project_id, &tx).await?;
+
+            let project = project::Entity::find_by_id(project_id)
+                .one(&*tx)
+                .await?
+                .ok_or_else(|| anyhow!("project not found"))?;
+            if project.host_connection()? == connection {
+                project::Entity::delete(project.into_active_model())
+                    .exec(&*tx)
+                    .await?;
+                let room = self.get_room(room_id, &tx).await?;
+                Ok((room, guest_connection_ids))
+            } else {
+                Err(anyhow!("cannot unshare a project hosted by another user"))?
+            }
+        })
+        .await
+    }
+
+    pub async fn update_project(
+        &self,
+        project_id: ProjectId,
+        connection: ConnectionId,
+        worktrees: &[proto::WorktreeMetadata],
+    ) -> Result<RoomGuard<(proto::Room, Vec<ConnectionId>)>> {
+        let room_id = self.room_id_for_project(project_id).await?;
+        self.room_transaction(room_id, |tx| async move {
+            let project = project::Entity::find_by_id(project_id)
+                .filter(
+                    Condition::all()
+                        .add(project::Column::HostConnectionId.eq(connection.id as i32))
+                        .add(
+                            project::Column::HostConnectionServerId.eq(connection.owner_id as i32),
+                        ),
+                )
+                .one(&*tx)
+                .await?
+                .ok_or_else(|| anyhow!("no such project"))?;
+
+            self.update_project_worktrees(project.id, worktrees, &tx)
+                .await?;
+
+            let guest_connection_ids = self.project_guest_connection_ids(project.id, &tx).await?;
+            let room = self.get_room(project.room_id, &tx).await?;
+            Ok((room, guest_connection_ids))
+        })
+        .await
+    }
+
+    pub(in crate::db) async fn update_project_worktrees(
+        &self,
+        project_id: ProjectId,
+        worktrees: &[proto::WorktreeMetadata],
+        tx: &DatabaseTransaction,
+    ) -> Result<()> {
+        if !worktrees.is_empty() {
+            worktree::Entity::insert_many(worktrees.iter().map(|worktree| worktree::ActiveModel {
+                id: ActiveValue::set(worktree.id as i64),
+                project_id: ActiveValue::set(project_id),
+                abs_path: ActiveValue::set(worktree.abs_path.clone()),
+                root_name: ActiveValue::set(worktree.root_name.clone()),
+                visible: ActiveValue::set(worktree.visible),
+                scan_id: ActiveValue::set(0),
+                completed_scan_id: ActiveValue::set(0),
+            }))
+            .on_conflict(
+                OnConflict::columns([worktree::Column::ProjectId, worktree::Column::Id])
+                    .update_column(worktree::Column::RootName)
+                    .to_owned(),
+            )
+            .exec(&*tx)
+            .await?;
+        }
+
+        worktree::Entity::delete_many()
+            .filter(worktree::Column::ProjectId.eq(project_id).and(
+                worktree::Column::Id.is_not_in(worktrees.iter().map(|worktree| worktree.id as i64)),
+            ))
+            .exec(&*tx)
+            .await?;
+
+        Ok(())
+    }
+
+    pub async fn update_worktree(
+        &self,
+        update: &proto::UpdateWorktree,
+        connection: ConnectionId,
+    ) -> Result<RoomGuard<Vec<ConnectionId>>> {
+        let project_id = ProjectId::from_proto(update.project_id);
+        let worktree_id = update.worktree_id as i64;
+        let room_id = self.room_id_for_project(project_id).await?;
+        self.room_transaction(room_id, |tx| async move {
+            // Ensure the update comes from the host.
+            let _project = project::Entity::find_by_id(project_id)
+                .filter(
+                    Condition::all()
+                        .add(project::Column::HostConnectionId.eq(connection.id as i32))
+                        .add(
+                            project::Column::HostConnectionServerId.eq(connection.owner_id as i32),
+                        ),
+                )
+                .one(&*tx)
+                .await?
+                .ok_or_else(|| anyhow!("no such project"))?;
+
+            // Update metadata.
+            worktree::Entity::update(worktree::ActiveModel {
+                id: ActiveValue::set(worktree_id),
+                project_id: ActiveValue::set(project_id),
+                root_name: ActiveValue::set(update.root_name.clone()),
+                scan_id: ActiveValue::set(update.scan_id as i64),
+                completed_scan_id: if update.is_last_update {
+                    ActiveValue::set(update.scan_id as i64)
+                } else {
+                    ActiveValue::default()
+                },
+                abs_path: ActiveValue::set(update.abs_path.clone()),
+                ..Default::default()
+            })
+            .exec(&*tx)
+            .await?;
+
+            if !update.updated_entries.is_empty() {
+                worktree_entry::Entity::insert_many(update.updated_entries.iter().map(|entry| {
+                    let mtime = entry.mtime.clone().unwrap_or_default();
+                    worktree_entry::ActiveModel {
+                        project_id: ActiveValue::set(project_id),
+                        worktree_id: ActiveValue::set(worktree_id),
+                        id: ActiveValue::set(entry.id as i64),
+                        is_dir: ActiveValue::set(entry.is_dir),
+                        path: ActiveValue::set(entry.path.clone()),
+                        inode: ActiveValue::set(entry.inode as i64),
+                        mtime_seconds: ActiveValue::set(mtime.seconds as i64),
+                        mtime_nanos: ActiveValue::set(mtime.nanos as i32),
+                        is_symlink: ActiveValue::set(entry.is_symlink),
+                        is_ignored: ActiveValue::set(entry.is_ignored),
+                        is_external: ActiveValue::set(entry.is_external),
+                        git_status: ActiveValue::set(entry.git_status.map(|status| status as i64)),
+                        is_deleted: ActiveValue::set(false),
+                        scan_id: ActiveValue::set(update.scan_id as i64),
+                    }
+                }))
+                .on_conflict(
+                    OnConflict::columns([
+                        worktree_entry::Column::ProjectId,
+                        worktree_entry::Column::WorktreeId,
+                        worktree_entry::Column::Id,
+                    ])
+                    .update_columns([
+                        worktree_entry::Column::IsDir,
+                        worktree_entry::Column::Path,
+                        worktree_entry::Column::Inode,
+                        worktree_entry::Column::MtimeSeconds,
+                        worktree_entry::Column::MtimeNanos,
+                        worktree_entry::Column::IsSymlink,
+                        worktree_entry::Column::IsIgnored,
+                        worktree_entry::Column::GitStatus,
+                        worktree_entry::Column::ScanId,
+                    ])
+                    .to_owned(),
+                )
+                .exec(&*tx)
+                .await?;
+            }
+
+            if !update.removed_entries.is_empty() {
+                worktree_entry::Entity::update_many()
+                    .filter(
+                        worktree_entry::Column::ProjectId
+                            .eq(project_id)
+                            .and(worktree_entry::Column::WorktreeId.eq(worktree_id))
+                            .and(
+                                worktree_entry::Column::Id
+                                    .is_in(update.removed_entries.iter().map(|id| *id as i64)),
+                            ),
+                    )
+                    .set(worktree_entry::ActiveModel {
+                        is_deleted: ActiveValue::Set(true),
+                        scan_id: ActiveValue::Set(update.scan_id as i64),
+                        ..Default::default()
+                    })
+                    .exec(&*tx)
+                    .await?;
+            }
+
+            if !update.updated_repositories.is_empty() {
+                worktree_repository::Entity::insert_many(update.updated_repositories.iter().map(
+                    |repository| worktree_repository::ActiveModel {
+                        project_id: ActiveValue::set(project_id),
+                        worktree_id: ActiveValue::set(worktree_id),
+                        work_directory_id: ActiveValue::set(repository.work_directory_id as i64),
+                        scan_id: ActiveValue::set(update.scan_id as i64),
+                        branch: ActiveValue::set(repository.branch.clone()),
+                        is_deleted: ActiveValue::set(false),
+                    },
+                ))
+                .on_conflict(
+                    OnConflict::columns([
+                        worktree_repository::Column::ProjectId,
+                        worktree_repository::Column::WorktreeId,
+                        worktree_repository::Column::WorkDirectoryId,
+                    ])
+                    .update_columns([
+                        worktree_repository::Column::ScanId,
+                        worktree_repository::Column::Branch,
+                    ])
+                    .to_owned(),
+                )
+                .exec(&*tx)
+                .await?;
+            }
+
+            if !update.removed_repositories.is_empty() {
+                worktree_repository::Entity::update_many()
+                    .filter(
+                        worktree_repository::Column::ProjectId
+                            .eq(project_id)
+                            .and(worktree_repository::Column::WorktreeId.eq(worktree_id))
+                            .and(
+                                worktree_repository::Column::WorkDirectoryId
+                                    .is_in(update.removed_repositories.iter().map(|id| *id as i64)),
+                            ),
+                    )
+                    .set(worktree_repository::ActiveModel {
+                        is_deleted: ActiveValue::Set(true),
+                        scan_id: ActiveValue::Set(update.scan_id as i64),
+                        ..Default::default()
+                    })
+                    .exec(&*tx)
+                    .await?;
+            }
+
+            let connection_ids = self.project_guest_connection_ids(project_id, &tx).await?;
+            Ok(connection_ids)
+        })
+        .await
+    }
+
+    pub async fn update_diagnostic_summary(
+        &self,
+        update: &proto::UpdateDiagnosticSummary,
+        connection: ConnectionId,
+    ) -> Result<RoomGuard<Vec<ConnectionId>>> {
+        let project_id = ProjectId::from_proto(update.project_id);
+        let worktree_id = update.worktree_id as i64;
+        let room_id = self.room_id_for_project(project_id).await?;
+        self.room_transaction(room_id, |tx| async move {
+            let summary = update
+                .summary
+                .as_ref()
+                .ok_or_else(|| anyhow!("invalid summary"))?;
+
+            // Ensure the update comes from the host.
+            let project = project::Entity::find_by_id(project_id)
+                .one(&*tx)
+                .await?
+                .ok_or_else(|| anyhow!("no such project"))?;
+            if project.host_connection()? != connection {
+                return Err(anyhow!("can't update a project hosted by someone else"))?;
+            }
+
+            // Update summary.
+            worktree_diagnostic_summary::Entity::insert(worktree_diagnostic_summary::ActiveModel {
+                project_id: ActiveValue::set(project_id),
+                worktree_id: ActiveValue::set(worktree_id),
+                path: ActiveValue::set(summary.path.clone()),
+                language_server_id: ActiveValue::set(summary.language_server_id as i64),
+                error_count: ActiveValue::set(summary.error_count as i32),
+                warning_count: ActiveValue::set(summary.warning_count as i32),
+                ..Default::default()
+            })
+            .on_conflict(
+                OnConflict::columns([
+                    worktree_diagnostic_summary::Column::ProjectId,
+                    worktree_diagnostic_summary::Column::WorktreeId,
+                    worktree_diagnostic_summary::Column::Path,
+                ])
+                .update_columns([
+                    worktree_diagnostic_summary::Column::LanguageServerId,
+                    worktree_diagnostic_summary::Column::ErrorCount,
+                    worktree_diagnostic_summary::Column::WarningCount,
+                ])
+                .to_owned(),
+            )
+            .exec(&*tx)
+            .await?;
+
+            let connection_ids = self.project_guest_connection_ids(project_id, &tx).await?;
+            Ok(connection_ids)
+        })
+        .await
+    }
+
+    pub async fn start_language_server(
+        &self,
+        update: &proto::StartLanguageServer,
+        connection: ConnectionId,
+    ) -> Result<RoomGuard<Vec<ConnectionId>>> {
+        let project_id = ProjectId::from_proto(update.project_id);
+        let room_id = self.room_id_for_project(project_id).await?;
+        self.room_transaction(room_id, |tx| async move {
+            let server = update
+                .server
+                .as_ref()
+                .ok_or_else(|| anyhow!("invalid language server"))?;
+
+            // Ensure the update comes from the host.
+            let project = project::Entity::find_by_id(project_id)
+                .one(&*tx)
+                .await?
+                .ok_or_else(|| anyhow!("no such project"))?;
+            if project.host_connection()? != connection {
+                return Err(anyhow!("can't update a project hosted by someone else"))?;
+            }
+
+            // Add the newly-started language server.
+            language_server::Entity::insert(language_server::ActiveModel {
+                project_id: ActiveValue::set(project_id),
+                id: ActiveValue::set(server.id as i64),
+                name: ActiveValue::set(server.name.clone()),
+                ..Default::default()
+            })
+            .on_conflict(
+                OnConflict::columns([
+                    language_server::Column::ProjectId,
+                    language_server::Column::Id,
+                ])
+                .update_column(language_server::Column::Name)
+                .to_owned(),
+            )
+            .exec(&*tx)
+            .await?;
+
+            let connection_ids = self.project_guest_connection_ids(project_id, &tx).await?;
+            Ok(connection_ids)
+        })
+        .await
+    }
+
+    pub async fn update_worktree_settings(
+        &self,
+        update: &proto::UpdateWorktreeSettings,
+        connection: ConnectionId,
+    ) -> Result<RoomGuard<Vec<ConnectionId>>> {
+        let project_id = ProjectId::from_proto(update.project_id);
+        let room_id = self.room_id_for_project(project_id).await?;
+        self.room_transaction(room_id, |tx| async move {
+            // Ensure the update comes from the host.
+            let project = project::Entity::find_by_id(project_id)
+                .one(&*tx)
+                .await?
+                .ok_or_else(|| anyhow!("no such project"))?;
+            if project.host_connection()? != connection {
+                return Err(anyhow!("can't update a project hosted by someone else"))?;
+            }
+
+            if let Some(content) = &update.content {
+                worktree_settings_file::Entity::insert(worktree_settings_file::ActiveModel {
+                    project_id: ActiveValue::Set(project_id),
+                    worktree_id: ActiveValue::Set(update.worktree_id as i64),
+                    path: ActiveValue::Set(update.path.clone()),
+                    content: ActiveValue::Set(content.clone()),
+                })
+                .on_conflict(
+                    OnConflict::columns([
+                        worktree_settings_file::Column::ProjectId,
+                        worktree_settings_file::Column::WorktreeId,
+                        worktree_settings_file::Column::Path,
+                    ])
+                    .update_column(worktree_settings_file::Column::Content)
+                    .to_owned(),
+                )
+                .exec(&*tx)
+                .await?;
+            } else {
+                worktree_settings_file::Entity::delete(worktree_settings_file::ActiveModel {
+                    project_id: ActiveValue::Set(project_id),
+                    worktree_id: ActiveValue::Set(update.worktree_id as i64),
+                    path: ActiveValue::Set(update.path.clone()),
+                    ..Default::default()
+                })
+                .exec(&*tx)
+                .await?;
+            }
+
+            let connection_ids = self.project_guest_connection_ids(project_id, &tx).await?;
+            Ok(connection_ids)
+        })
+        .await
+    }
+
+    pub async fn join_project(
+        &self,
+        project_id: ProjectId,
+        connection: ConnectionId,
+    ) -> Result<RoomGuard<(Project, ReplicaId)>> {
+        let room_id = self.room_id_for_project(project_id).await?;
+        self.room_transaction(room_id, |tx| async move {
+            let participant = room_participant::Entity::find()
+                .filter(
+                    Condition::all()
+                        .add(
+                            room_participant::Column::AnsweringConnectionId
+                                .eq(connection.id as i32),
+                        )
+                        .add(
+                            room_participant::Column::AnsweringConnectionServerId
+                                .eq(connection.owner_id as i32),
+                        ),
+                )
+                .one(&*tx)
+                .await?
+                .ok_or_else(|| anyhow!("must join a room first"))?;
+
+            let project = project::Entity::find_by_id(project_id)
+                .one(&*tx)
+                .await?
+                .ok_or_else(|| anyhow!("no such project"))?;
+            if project.room_id != participant.room_id {
+                return Err(anyhow!("no such project"))?;
+            }
+
+            let mut collaborators = project
+                .find_related(project_collaborator::Entity)
+                .all(&*tx)
+                .await?;
+            let replica_ids = collaborators
+                .iter()
+                .map(|c| c.replica_id)
+                .collect::<HashSet<_>>();
+            let mut replica_id = ReplicaId(1);
+            while replica_ids.contains(&replica_id) {
+                replica_id.0 += 1;
+            }
+            let new_collaborator = project_collaborator::ActiveModel {
+                project_id: ActiveValue::set(project_id),
+                connection_id: ActiveValue::set(connection.id as i32),
+                connection_server_id: ActiveValue::set(ServerId(connection.owner_id as i32)),
+                user_id: ActiveValue::set(participant.user_id),
+                replica_id: ActiveValue::set(replica_id),
+                is_host: ActiveValue::set(false),
+                ..Default::default()
+            }
+            .insert(&*tx)
+            .await?;
+            collaborators.push(new_collaborator);
+
+            let db_worktrees = project.find_related(worktree::Entity).all(&*tx).await?;
+            let mut worktrees = db_worktrees
+                .into_iter()
+                .map(|db_worktree| {
+                    (
+                        db_worktree.id as u64,
+                        Worktree {
+                            id: db_worktree.id as u64,
+                            abs_path: db_worktree.abs_path,
+                            root_name: db_worktree.root_name,
+                            visible: db_worktree.visible,
+                            entries: Default::default(),
+                            repository_entries: Default::default(),
+                            diagnostic_summaries: Default::default(),
+                            settings_files: Default::default(),
+                            scan_id: db_worktree.scan_id as u64,
+                            completed_scan_id: db_worktree.completed_scan_id as u64,
+                        },
+                    )
+                })
+                .collect::<BTreeMap<_, _>>();
+
+            // Populate worktree entries.
+            {
+                let mut db_entries = worktree_entry::Entity::find()
+                    .filter(
+                        Condition::all()
+                            .add(worktree_entry::Column::ProjectId.eq(project_id))
+                            .add(worktree_entry::Column::IsDeleted.eq(false)),
+                    )
+                    .stream(&*tx)
+                    .await?;
+                while let Some(db_entry) = db_entries.next().await {
+                    let db_entry = db_entry?;
+                    if let Some(worktree) = worktrees.get_mut(&(db_entry.worktree_id as u64)) {
+                        worktree.entries.push(proto::Entry {
+                            id: db_entry.id as u64,
+                            is_dir: db_entry.is_dir,
+                            path: db_entry.path,
+                            inode: db_entry.inode as u64,
+                            mtime: Some(proto::Timestamp {
+                                seconds: db_entry.mtime_seconds as u64,
+                                nanos: db_entry.mtime_nanos as u32,
+                            }),
+                            is_symlink: db_entry.is_symlink,
+                            is_ignored: db_entry.is_ignored,
+                            is_external: db_entry.is_external,
+                            git_status: db_entry.git_status.map(|status| status as i32),
+                        });
+                    }
+                }
+            }
+
+            // Populate repository entries.
+            {
+                let mut db_repository_entries = worktree_repository::Entity::find()
+                    .filter(
+                        Condition::all()
+                            .add(worktree_repository::Column::ProjectId.eq(project_id))
+                            .add(worktree_repository::Column::IsDeleted.eq(false)),
+                    )
+                    .stream(&*tx)
+                    .await?;
+                while let Some(db_repository_entry) = db_repository_entries.next().await {
+                    let db_repository_entry = db_repository_entry?;
+                    if let Some(worktree) =
+                        worktrees.get_mut(&(db_repository_entry.worktree_id as u64))
+                    {
+                        worktree.repository_entries.insert(
+                            db_repository_entry.work_directory_id as u64,
+                            proto::RepositoryEntry {
+                                work_directory_id: db_repository_entry.work_directory_id as u64,
+                                branch: db_repository_entry.branch,
+                            },
+                        );
+                    }
+                }
+            }
+
+            // Populate worktree diagnostic summaries.
+            {
+                let mut db_summaries = worktree_diagnostic_summary::Entity::find()
+                    .filter(worktree_diagnostic_summary::Column::ProjectId.eq(project_id))
+                    .stream(&*tx)
+                    .await?;
+                while let Some(db_summary) = db_summaries.next().await {
+                    let db_summary = db_summary?;
+                    if let Some(worktree) = worktrees.get_mut(&(db_summary.worktree_id as u64)) {
+                        worktree
+                            .diagnostic_summaries
+                            .push(proto::DiagnosticSummary {
+                                path: db_summary.path,
+                                language_server_id: db_summary.language_server_id as u64,
+                                error_count: db_summary.error_count as u32,
+                                warning_count: db_summary.warning_count as u32,
+                            });
+                    }
+                }
+            }
+
+            // Populate worktree settings files
+            {
+                let mut db_settings_files = worktree_settings_file::Entity::find()
+                    .filter(worktree_settings_file::Column::ProjectId.eq(project_id))
+                    .stream(&*tx)
+                    .await?;
+                while let Some(db_settings_file) = db_settings_files.next().await {
+                    let db_settings_file = db_settings_file?;
+                    if let Some(worktree) =
+                        worktrees.get_mut(&(db_settings_file.worktree_id as u64))
+                    {
+                        worktree.settings_files.push(WorktreeSettingsFile {
+                            path: db_settings_file.path,
+                            content: db_settings_file.content,
+                        });
+                    }
+                }
+            }
+
+            // Populate language servers.
+            let language_servers = project
+                .find_related(language_server::Entity)
+                .all(&*tx)
+                .await?;
+
+            let project = Project {
+                collaborators: collaborators
+                    .into_iter()
+                    .map(|collaborator| ProjectCollaborator {
+                        connection_id: collaborator.connection(),
+                        user_id: collaborator.user_id,
+                        replica_id: collaborator.replica_id,
+                        is_host: collaborator.is_host,
+                    })
+                    .collect(),
+                worktrees,
+                language_servers: language_servers
+                    .into_iter()
+                    .map(|language_server| proto::LanguageServer {
+                        id: language_server.id as u64,
+                        name: language_server.name,
+                    })
+                    .collect(),
+            };
+            Ok((project, replica_id as ReplicaId))
+        })
+        .await
+    }
+
+    pub async fn leave_project(
+        &self,
+        project_id: ProjectId,
+        connection: ConnectionId,
+    ) -> Result<RoomGuard<(proto::Room, LeftProject)>> {
+        let room_id = self.room_id_for_project(project_id).await?;
+        self.room_transaction(room_id, |tx| async move {
+            let result = project_collaborator::Entity::delete_many()
+                .filter(
+                    Condition::all()
+                        .add(project_collaborator::Column::ProjectId.eq(project_id))
+                        .add(project_collaborator::Column::ConnectionId.eq(connection.id as i32))
+                        .add(
+                            project_collaborator::Column::ConnectionServerId
+                                .eq(connection.owner_id as i32),
+                        ),
+                )
+                .exec(&*tx)
+                .await?;
+            if result.rows_affected == 0 {
+                Err(anyhow!("not a collaborator on this project"))?;
+            }
+
+            let project = project::Entity::find_by_id(project_id)
+                .one(&*tx)
+                .await?
+                .ok_or_else(|| anyhow!("no such project"))?;
+            let collaborators = project
+                .find_related(project_collaborator::Entity)
+                .all(&*tx)
+                .await?;
+            let connection_ids = collaborators
+                .into_iter()
+                .map(|collaborator| collaborator.connection())
+                .collect();
+
+            follower::Entity::delete_many()
+                .filter(
+                    Condition::any()
+                        .add(
+                            Condition::all()
+                                .add(follower::Column::ProjectId.eq(Some(project_id)))
+                                .add(
+                                    follower::Column::LeaderConnectionServerId
+                                        .eq(connection.owner_id),
+                                )
+                                .add(follower::Column::LeaderConnectionId.eq(connection.id)),
+                        )
+                        .add(
+                            Condition::all()
+                                .add(follower::Column::ProjectId.eq(Some(project_id)))
+                                .add(
+                                    follower::Column::FollowerConnectionServerId
+                                        .eq(connection.owner_id),
+                                )
+                                .add(follower::Column::FollowerConnectionId.eq(connection.id)),
+                        ),
+                )
+                .exec(&*tx)
+                .await?;
+
+            let room = self.get_room(project.room_id, &tx).await?;
+            let left_project = LeftProject {
+                id: project_id,
+                host_user_id: project.host_user_id,
+                host_connection_id: project.host_connection()?,
+                connection_ids,
+            };
+            Ok((room, left_project))
+        })
+        .await
+    }
+
+    pub async fn project_collaborators(
+        &self,
+        project_id: ProjectId,
+        connection_id: ConnectionId,
+    ) -> Result<RoomGuard<Vec<ProjectCollaborator>>> {
+        let room_id = self.room_id_for_project(project_id).await?;
+        self.room_transaction(room_id, |tx| async move {
+            let collaborators = project_collaborator::Entity::find()
+                .filter(project_collaborator::Column::ProjectId.eq(project_id))
+                .all(&*tx)
+                .await?
+                .into_iter()
+                .map(|collaborator| ProjectCollaborator {
+                    connection_id: collaborator.connection(),
+                    user_id: collaborator.user_id,
+                    replica_id: collaborator.replica_id,
+                    is_host: collaborator.is_host,
+                })
+                .collect::<Vec<_>>();
+
+            if collaborators
+                .iter()
+                .any(|collaborator| collaborator.connection_id == connection_id)
+            {
+                Ok(collaborators)
+            } else {
+                Err(anyhow!("no such project"))?
+            }
+        })
+        .await
+    }
+
+    pub async fn project_connection_ids(
+        &self,
+        project_id: ProjectId,
+        connection_id: ConnectionId,
+    ) -> Result<RoomGuard<HashSet<ConnectionId>>> {
+        let room_id = self.room_id_for_project(project_id).await?;
+        self.room_transaction(room_id, |tx| async move {
+            let mut collaborators = project_collaborator::Entity::find()
+                .filter(project_collaborator::Column::ProjectId.eq(project_id))
+                .stream(&*tx)
+                .await?;
+
+            let mut connection_ids = HashSet::default();
+            while let Some(collaborator) = collaborators.next().await {
+                let collaborator = collaborator?;
+                connection_ids.insert(collaborator.connection());
+            }
+
+            if connection_ids.contains(&connection_id) {
+                Ok(connection_ids)
+            } else {
+                Err(anyhow!("no such project"))?
+            }
+        })
+        .await
+    }
+
+    async fn project_guest_connection_ids(
+        &self,
+        project_id: ProjectId,
+        tx: &DatabaseTransaction,
+    ) -> Result<Vec<ConnectionId>> {
+        let mut collaborators = project_collaborator::Entity::find()
+            .filter(
+                project_collaborator::Column::ProjectId
+                    .eq(project_id)
+                    .and(project_collaborator::Column::IsHost.eq(false)),
+            )
+            .stream(tx)
+            .await?;
+
+        let mut guest_connection_ids = Vec::new();
+        while let Some(collaborator) = collaborators.next().await {
+            let collaborator = collaborator?;
+            guest_connection_ids.push(collaborator.connection());
+        }
+        Ok(guest_connection_ids)
+    }
+
+    pub async fn room_id_for_project(&self, project_id: ProjectId) -> Result<RoomId> {
+        self.transaction(|tx| async move {
+            let project = project::Entity::find_by_id(project_id)
+                .one(&*tx)
+                .await?
+                .ok_or_else(|| anyhow!("project {} not found", project_id))?;
+            Ok(project.room_id)
+        })
+        .await
+    }
+
+    pub async fn check_room_participants(
+        &self,
+        room_id: RoomId,
+        leader_id: ConnectionId,
+        follower_id: ConnectionId,
+    ) -> Result<()> {
+        self.transaction(|tx| async move {
+            use room_participant::Column;
+
+            let count = room_participant::Entity::find()
+                .filter(
+                    Condition::all().add(Column::RoomId.eq(room_id)).add(
+                        Condition::any()
+                            .add(Column::AnsweringConnectionId.eq(leader_id.id as i32).and(
+                                Column::AnsweringConnectionServerId.eq(leader_id.owner_id as i32),
+                            ))
+                            .add(Column::AnsweringConnectionId.eq(follower_id.id as i32).and(
+                                Column::AnsweringConnectionServerId.eq(follower_id.owner_id as i32),
+                            )),
+                    ),
+                )
+                .count(&*tx)
+                .await?;
+
+            if count < 2 {
+                Err(anyhow!("not room participants"))?;
+            }
+
+            Ok(())
+        })
+        .await
+    }
+
+    pub async fn follow(
+        &self,
+        room_id: RoomId,
+        project_id: ProjectId,
+        leader_connection: ConnectionId,
+        follower_connection: ConnectionId,
+    ) -> Result<RoomGuard<proto::Room>> {
+        self.room_transaction(room_id, |tx| async move {
+            follower::ActiveModel {
+                room_id: ActiveValue::set(room_id),
+                project_id: ActiveValue::set(project_id),
+                leader_connection_server_id: ActiveValue::set(ServerId(
+                    leader_connection.owner_id as i32,
+                )),
+                leader_connection_id: ActiveValue::set(leader_connection.id as i32),
+                follower_connection_server_id: ActiveValue::set(ServerId(
+                    follower_connection.owner_id as i32,
+                )),
+                follower_connection_id: ActiveValue::set(follower_connection.id as i32),
+                ..Default::default()
+            }
+            .insert(&*tx)
+            .await?;
+
+            let room = self.get_room(room_id, &*tx).await?;
+            Ok(room)
+        })
+        .await
+    }
+
+    pub async fn unfollow(
+        &self,
+        room_id: RoomId,
+        project_id: ProjectId,
+        leader_connection: ConnectionId,
+        follower_connection: ConnectionId,
+    ) -> Result<RoomGuard<proto::Room>> {
+        self.room_transaction(room_id, |tx| async move {
+            follower::Entity::delete_many()
+                .filter(
+                    Condition::all()
+                        .add(follower::Column::RoomId.eq(room_id))
+                        .add(follower::Column::ProjectId.eq(project_id))
+                        .add(
+                            follower::Column::LeaderConnectionServerId
+                                .eq(leader_connection.owner_id),
+                        )
+                        .add(follower::Column::LeaderConnectionId.eq(leader_connection.id))
+                        .add(
+                            follower::Column::FollowerConnectionServerId
+                                .eq(follower_connection.owner_id),
+                        )
+                        .add(follower::Column::FollowerConnectionId.eq(follower_connection.id)),
+                )
+                .exec(&*tx)
+                .await?;
+
+            let room = self.get_room(room_id, &*tx).await?;
+            Ok(room)
+        })
+        .await
+    }
+}

crates/collab2/collab/src/db/queries/servers.rs

@@ -0,0 +1,99 @@
+use super::*;
+
+impl Database {
+    pub async fn create_server(&self, environment: &str) -> Result<ServerId> {
+        self.transaction(|tx| async move {
+            let server = server::ActiveModel {
+                environment: ActiveValue::set(environment.into()),
+                ..Default::default()
+            }
+            .insert(&*tx)
+            .await?;
+            Ok(server.id)
+        })
+        .await
+    }
+
+    pub async fn stale_server_resource_ids(
+        &self,
+        environment: &str,
+        new_server_id: ServerId,
+    ) -> Result<(Vec<RoomId>, Vec<ChannelId>)> {
+        self.transaction(|tx| async move {
+            #[derive(Copy, Clone, Debug, EnumIter, DeriveColumn)]
+            enum QueryRoomIds {
+                RoomId,
+            }
+
+            #[derive(Copy, Clone, Debug, EnumIter, DeriveColumn)]
+            enum QueryChannelIds {
+                ChannelId,
+            }
+
+            let stale_server_epochs = self
+                .stale_server_ids(environment, new_server_id, &tx)
+                .await?;
+            let room_ids = room_participant::Entity::find()
+                .select_only()
+                .column(room_participant::Column::RoomId)
+                .distinct()
+                .filter(
+                    room_participant::Column::AnsweringConnectionServerId
+                        .is_in(stale_server_epochs.iter().copied()),
+                )
+                .into_values::<_, QueryRoomIds>()
+                .all(&*tx)
+                .await?;
+            let channel_ids = channel_buffer_collaborator::Entity::find()
+                .select_only()
+                .column(channel_buffer_collaborator::Column::ChannelId)
+                .distinct()
+                .filter(
+                    channel_buffer_collaborator::Column::ConnectionServerId
+                        .is_in(stale_server_epochs.iter().copied()),
+                )
+                .into_values::<_, QueryChannelIds>()
+                .all(&*tx)
+                .await?;
+
+            Ok((room_ids, channel_ids))
+        })
+        .await
+    }
+
+    pub async fn delete_stale_servers(
+        &self,
+        environment: &str,
+        new_server_id: ServerId,
+    ) -> Result<()> {
+        self.transaction(|tx| async move {
+            server::Entity::delete_many()
+                .filter(
+                    Condition::all()
+                        .add(server::Column::Environment.eq(environment))
+                        .add(server::Column::Id.ne(new_server_id)),
+                )
+                .exec(&*tx)
+                .await?;
+            Ok(())
+        })
+        .await
+    }
+
+    async fn stale_server_ids(
+        &self,
+        environment: &str,
+        new_server_id: ServerId,
+        tx: &DatabaseTransaction,
+    ) -> Result<Vec<ServerId>> {
+        let stale_servers = server::Entity::find()
+            .filter(
+                Condition::all()
+                    .add(server::Column::Environment.eq(environment))
+                    .add(server::Column::Id.ne(new_server_id)),
+            )
+            .all(&*tx)
+            .await?;
+        Ok(stale_servers.into_iter().map(|server| server.id).collect())
+    }
+}

crates/collab2/collab/src/db/queries/users.rs

@@ -0,0 +1,259 @@
+use super::*;
+
+impl Database {
+    pub async fn create_user(
+        &self,
+        email_address: &str,
+        admin: bool,
+        params: NewUserParams,
+    ) -> Result<NewUserResult> {
+        self.transaction(|tx| async {
+            let tx = tx;
+            let user = user::Entity::insert(user::ActiveModel {
+                email_address: ActiveValue::set(Some(email_address.into())),
+                github_login: ActiveValue::set(params.github_login.clone()),
+                github_user_id: ActiveValue::set(Some(params.github_user_id)),
+                admin: ActiveValue::set(admin),
+                metrics_id: ActiveValue::set(Uuid::new_v4()),
+                ..Default::default()
+            })
+            .on_conflict(
+                OnConflict::column(user::Column::GithubLogin)
+                    .update_column(user::Column::GithubLogin)
+                    .to_owned(),
+            )
+            .exec_with_returning(&*tx)
+            .await?;
+
+            Ok(NewUserResult {
+                user_id: user.id,
+                metrics_id: user.metrics_id.to_string(),
+                signup_device_id: None,
+                inviting_user_id: None,
+            })
+        })
+        .await
+    }
+
+    pub async fn get_user_by_id(&self, id: UserId) -> Result<Option<user::Model>> {
+        self.transaction(|tx| async move { Ok(user::Entity::find_by_id(id).one(&*tx).await?) })
+            .await
+    }
+
+    pub async fn get_users_by_ids(&self, ids: Vec<UserId>) -> Result<Vec<user::Model>> {
+        self.transaction(|tx| async {
+            let tx = tx;
+            Ok(user::Entity::find()
+                .filter(user::Column::Id.is_in(ids.iter().copied()))
+                .all(&*tx)
+                .await?)
+        })
+        .await
+    }
+
+    pub async fn get_user_by_github_login(&self, github_login: &str) -> Result<Option<User>> {
+        self.transaction(|tx| async move {
+            Ok(user::Entity::find()
+                .filter(user::Column::GithubLogin.eq(github_login))
+                .one(&*tx)
+                .await?)
+        })
+        .await
+    }
+
+    pub async fn get_or_create_user_by_github_account(
+        &self,
+        github_login: &str,
+        github_user_id: Option<i32>,
+        github_email: Option<&str>,
+    ) -> Result<Option<User>> {
+        self.transaction(|tx| async move {
+            let tx = &*tx;
+            if let Some(github_user_id) = github_user_id {
+                if let Some(user_by_github_user_id) = user::Entity::find()
+                    .filter(user::Column::GithubUserId.eq(github_user_id))
+                    .one(tx)
+                    .await?
+                {
+                    let mut user_by_github_user_id = user_by_github_user_id.into_active_model();
+                    user_by_github_user_id.github_login = ActiveValue::set(github_login.into());
+                    Ok(Some(user_by_github_user_id.update(tx).await?))
+                } else if let Some(user_by_github_login) = user::Entity::find()
+                    .filter(user::Column::GithubLogin.eq(github_login))
+                    .one(tx)
+                    .await?
+                {
+                    let mut user_by_github_login = user_by_github_login.into_active_model();
+                    user_by_github_login.github_user_id = ActiveValue::set(Some(github_user_id));
+                    Ok(Some(user_by_github_login.update(tx).await?))
+                } else {
+                    let user = user::Entity::insert(user::ActiveModel {
+                        email_address: ActiveValue::set(github_email.map(|email| email.into())),
+                        github_login: ActiveValue::set(github_login.into()),
+                        github_user_id: ActiveValue::set(Some(github_user_id)),
+                        admin: ActiveValue::set(false),
+                        invite_count: ActiveValue::set(0),
+                        invite_code: ActiveValue::set(None),
+                        metrics_id: ActiveValue::set(Uuid::new_v4()),
+                        ..Default::default()
+                    })
+                    .exec_with_returning(&*tx)
+                    .await?;
+                    Ok(Some(user))
+                }
+            } else {
+                Ok(user::Entity::find()
+                    .filter(user::Column::GithubLogin.eq(github_login))
+                    .one(tx)
+                    .await?)
+            }
+        })
+        .await
+    }
+
+    pub async fn get_all_users(&self, page: u32, limit: u32) -> Result<Vec<User>> {
+        self.transaction(|tx| async move {
+            Ok(user::Entity::find()
+                .order_by_asc(user::Column::GithubLogin)
+                .limit(limit as u64)
+                .offset(page as u64 * limit as u64)
+                .all(&*tx)
+                .await?)
+        })
+        .await
+    }
+
+    pub async fn get_user_metrics_id(&self, id: UserId) -> Result<String> {
+        #[derive(Copy, Clone, Debug, EnumIter, DeriveColumn)]
+        enum QueryAs {
+            MetricsId,
+        }
+
+        self.transaction(|tx| async move {
+            let metrics_id: Uuid = user::Entity::find_by_id(id)
+                .select_only()
+                .column(user::Column::MetricsId)
+                .into_values::<_, QueryAs>()
+                .one(&*tx)
+                .await?
+                .ok_or_else(|| anyhow!("could not find user"))?;
+            Ok(metrics_id.to_string())
+        })
+        .await
+    }
+
+    pub async fn set_user_connected_once(&self, id: UserId, connected_once: bool) -> Result<()> {
+        self.transaction(|tx| async move {
+            user::Entity::update_many()
+                .filter(user::Column::Id.eq(id))
+                .set(user::ActiveModel {
+                    connected_once: ActiveValue::set(connected_once),
+                    ..Default::default()
+                })
+                .exec(&*tx)
+                .await?;
+            Ok(())
+        })
+        .await
+    }
+
+    pub async fn destroy_user(&self, id: UserId) -> Result<()> {
+        self.transaction(|tx| async move {
+            access_token::Entity::delete_many()
+                .filter(access_token::Column::UserId.eq(id))
+                .exec(&*tx)
+                .await?;
+            user::Entity::delete_by_id(id).exec(&*tx).await?;
+            Ok(())
+        })
+        .await
+    }
+
+    pub async fn fuzzy_search_users(&self, name_query: &str, limit: u32) -> Result<Vec<User>> {
+        self.transaction(|tx| async {
+            let tx = tx;
+            let like_string = Self::fuzzy_like_string(name_query);
+            let query = "
+                SELECT users.*
+                FROM users
+                WHERE github_login ILIKE $1
+                ORDER BY github_login <-> $2
+                LIMIT $3
+            ";
+
+            Ok(user::Entity::find()
+                .from_raw_sql(Statement::from_sql_and_values(
+                    self.pool.get_database_backend(),
+                    query,
+                    vec![like_string.into(), name_query.into(), limit.into()],
+                ))
+                .all(&*tx)
+                .await?)
+        })
+        .await
+    }
+
+    pub fn fuzzy_like_string(string: &str) -> String {
+        let mut result = String::with_capacity(string.len() * 2 + 1);
+        for c in string.chars() {
+            if c.is_alphanumeric() {
+                result.push('%');
+                result.push(c);
+            }
+        }
+        result.push('%');
+        result
+    }
+
+    pub async fn create_user_flag(&self, flag: &str) -> Result<FlagId> {
+        self.transaction(|tx| async move {
+            let flag = feature_flag::Entity::insert(feature_flag::ActiveModel {
+                flag: ActiveValue::set(flag.to_string()),
+                ..Default::default()
+            })
+            .exec(&*tx)
+            .await?
+            .last_insert_id;
+
+            Ok(flag)
+        })
+        .await
+    }
+
+    pub async fn add_user_flag(&self, user: UserId, flag: FlagId) -> Result<()> {
+        self.transaction(|tx| async move {
+            user_feature::Entity::insert(user_feature::ActiveModel {
+                user_id: ActiveValue::set(user),
+                feature_id: ActiveValue::set(flag),
+            })
+            .exec(&*tx)
+            .await?;
+
+            Ok(())
+        })
+        .await
+    }
+
+    pub async fn get_user_flags(&self, user: UserId) -> Result<Vec<String>> {
+        self.transaction(|tx| async move {
+            #[derive(Copy, Clone, Debug, EnumIter, DeriveColumn)]
+            enum QueryAs {
+                Flag,
+            }
+
+            let flags = user::Model {
+                id: user,
+                ..Default::default()
+            }
+            .find_linked(user::UserFlags)
+            .select_only()
+            .column(feature_flag::Column::Flag)
+            .into_values::<_, QueryAs>()
+            .all(&*tx)
+            .await?;
+
+            Ok(flags)
+        })
+        .await
+    }
+}

crates/collab2/collab/src/db/tables.rs

@@ -0,0 +1,32 @@
+pub mod access_token;
+pub mod buffer;
+pub mod buffer_operation;
+pub mod buffer_snapshot;
+pub mod channel;
+pub mod channel_buffer_collaborator;
+pub mod channel_chat_participant;
+pub mod channel_member;
+pub mod channel_message;
+pub mod channel_message_mention;
+pub mod contact;
+pub mod feature_flag;
+pub mod follower;
+pub mod language_server;
+pub mod notification;
+pub mod notification_kind;
+pub mod observed_buffer_edits;
+pub mod observed_channel_messages;
+pub mod project;
+pub mod project_collaborator;
+pub mod room;
+pub mod room_participant;
+pub mod server;
+pub mod signup;
+pub mod user;
+pub mod user_feature;
+pub mod worktree;
+pub mod worktree_diagnostic_summary;
+pub mod worktree_entry;
+pub mod worktree_repository;
+pub mod worktree_repository_statuses;
+pub mod worktree_settings_file;

crates/collab2/collab/src/db/tables/access_token.rs

@@ -0,0 +1,29 @@
+use crate::db::{AccessTokenId, UserId};
+use sea_orm::entity::prelude::*;
+
+#[derive(Clone, Debug, PartialEq, Eq, DeriveEntityModel)]
+#[sea_orm(table_name = "access_tokens")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    pub id: AccessTokenId,
+    pub user_id: UserId,
+    pub hash: String,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {
+    #[sea_orm(
+        belongs_to = "super::user::Entity",
+        from = "Column::UserId",
+        to = "super::user::Column::Id"
+    )]
+    User,
+}
+
+impl Related<super::user::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::User.def()
+    }
+}
+
+impl ActiveModelBehavior for ActiveModel {}

crates/collab2/collab/src/db/tables/buffer.rs

@@ -0,0 +1,45 @@
+use crate::db::{BufferId, ChannelId};
+use sea_orm::entity::prelude::*;
+
+#[derive(Clone, Debug, PartialEq, Eq, DeriveEntityModel)]
+#[sea_orm(table_name = "buffers")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    pub id: BufferId,
+    pub epoch: i32,
+    pub channel_id: ChannelId,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {
+    #[sea_orm(has_many = "super::buffer_operation::Entity")]
+    Operations,
+    #[sea_orm(has_many = "super::buffer_snapshot::Entity")]
+    Snapshots,
+    #[sea_orm(
+        belongs_to = "super::channel::Entity",
+        from = "Column::ChannelId",
+        to = "super::channel::Column::Id"
+    )]
+    Channel,
+}
+
+impl Related<super::buffer_operation::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::Operations.def()
+    }
+}
+
+impl Related<super::buffer_snapshot::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::Snapshots.def()
+    }
+}
+
+impl Related<super::channel::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::Channel.def()
+    }
+}
+
+impl ActiveModelBehavior for ActiveModel {}

crates/collab2/collab/src/db/tables/buffer_operation.rs

@@ -0,0 +1,34 @@
+use crate::db::BufferId;
+use sea_orm::entity::prelude::*;
+
+#[derive(Clone, Debug, PartialEq, Eq, DeriveEntityModel)]
+#[sea_orm(table_name = "buffer_operations")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    pub buffer_id: BufferId,
+    #[sea_orm(primary_key)]
+    pub epoch: i32,
+    #[sea_orm(primary_key)]
+    pub lamport_timestamp: i32,
+    #[sea_orm(primary_key)]
+    pub replica_id: i32,
+    pub value: Vec<u8>,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {
+    #[sea_orm(
+        belongs_to = "super::buffer::Entity",
+        from = "Column::BufferId",
+        to = "super::buffer::Column::Id"
+    )]
+    Buffer,
+}
+
+impl Related<super::buffer::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::Buffer.def()
+    }
+}
+
+impl ActiveModelBehavior for ActiveModel {}

crates/collab2/collab/src/db/tables/buffer_snapshot.rs

@@ -0,0 +1,31 @@
+use crate::db::BufferId;
+use sea_orm::entity::prelude::*;
+
+#[derive(Clone, Debug, PartialEq, Eq, DeriveEntityModel)]
+#[sea_orm(table_name = "buffer_snapshots")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    pub buffer_id: BufferId,
+    #[sea_orm(primary_key)]
+    pub epoch: i32,
+    pub text: String,
+    pub operation_serialization_version: i32,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {
+    #[sea_orm(
+        belongs_to = "super::buffer::Entity",
+        from = "Column::BufferId",
+        to = "super::buffer::Column::Id"
+    )]
+    Buffer,
+}
+
+impl Related<super::buffer::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::Buffer.def()
+    }
+}
+
+impl ActiveModelBehavior for ActiveModel {}

crates/collab2/collab/src/db/tables/channel.rs

@@ -0,0 +1,79 @@
+use crate::db::{ChannelId, ChannelVisibility};
+use sea_orm::entity::prelude::*;
+
+#[derive(Clone, Debug, Default, PartialEq, Eq, DeriveEntityModel)]
+#[sea_orm(table_name = "channels")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    pub id: ChannelId,
+    pub name: String,
+    pub visibility: ChannelVisibility,
+    pub parent_path: String,
+}
+
+impl Model {
+    pub fn parent_id(&self) -> Option<ChannelId> {
+        self.ancestors().last()
+    }
+
+    pub fn ancestors(&self) -> impl Iterator<Item = ChannelId> + '_ {
+        self.parent_path
+            .trim_end_matches('/')
+            .split('/')
+            .filter_map(|id| Some(ChannelId::from_proto(id.parse().ok()?)))
+    }
+
+    pub fn ancestors_including_self(&self) -> impl Iterator<Item = ChannelId> + '_ {
+        self.ancestors().chain(Some(self.id))
+    }
+
+    pub fn path(&self) -> String {
+        format!("{}{}/", self.parent_path, self.id)
+    }
+}
+
+impl ActiveModelBehavior for ActiveModel {}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {
+    #[sea_orm(has_one = "super::room::Entity")]
+    Room,
+    #[sea_orm(has_one = "super::buffer::Entity")]
+    Buffer,
+    #[sea_orm(has_many = "super::channel_member::Entity")]
+    Member,
+    #[sea_orm(has_many = "super::channel_buffer_collaborator::Entity")]
+    BufferCollaborators,
+    #[sea_orm(has_many = "super::channel_chat_participant::Entity")]
+    ChatParticipants,
+}
+
+impl Related<super::channel_member::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::Member.def()
+    }
+}
+
+impl Related<super::room::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::Room.def()
+    }
+}
+
+impl Related<super::buffer::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::Buffer.def()
+    }
+}
+
+impl Related<super::channel_buffer_collaborator::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::BufferCollaborators.def()
+    }
+}
+
+impl Related<super::channel_chat_participant::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::ChatParticipants.def()
+    }
+}

crates/collab2/collab/src/db/tables/channel_buffer_collaborator.rs

@@ -0,0 +1,43 @@
+use crate::db::{ChannelBufferCollaboratorId, ChannelId, ReplicaId, ServerId, UserId};
+use rpc::ConnectionId;
+use sea_orm::entity::prelude::*;
+
+#[derive(Clone, Debug, PartialEq, Eq, DeriveEntityModel)]
+#[sea_orm(table_name = "channel_buffer_collaborators")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    pub id: ChannelBufferCollaboratorId,
+    pub channel_id: ChannelId,
+    pub connection_id: i32,
+    pub connection_server_id: ServerId,
+    pub connection_lost: bool,
+    pub user_id: UserId,
+    pub replica_id: ReplicaId,
+}
+
+impl Model {
+    pub fn connection(&self) -> ConnectionId {
+        ConnectionId {
+            owner_id: self.connection_server_id.0 as u32,
+            id: self.connection_id as u32,
+        }
+    }
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {
+    #[sea_orm(
+        belongs_to = "super::channel::Entity",
+        from = "Column::ChannelId",
+        to = "super::channel::Column::Id"
+    )]
+    Channel,
+}
+
+impl Related<super::channel::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::Channel.def()
+    }
+}
+
+impl ActiveModelBehavior for ActiveModel {}

crates/collab2/collab/src/db/tables/channel_chat_participant.rs

@@ -0,0 +1,41 @@
+use crate::db::{ChannelChatParticipantId, ChannelId, ServerId, UserId};
+use rpc::ConnectionId;
+use sea_orm::entity::prelude::*;
+
+#[derive(Clone, Debug, PartialEq, Eq, DeriveEntityModel)]
+#[sea_orm(table_name = "channel_chat_participants")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    pub id: ChannelChatParticipantId,
+    pub channel_id: ChannelId,
+    pub user_id: UserId,
+    pub connection_id: i32,
+    pub connection_server_id: ServerId,
+}
+
+impl Model {
+    pub fn connection(&self) -> ConnectionId {
+        ConnectionId {
+            owner_id: self.connection_server_id.0 as u32,
+            id: self.connection_id as u32,
+        }
+    }
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {
+    #[sea_orm(
+        belongs_to = "super::channel::Entity",
+        from = "Column::ChannelId",
+        to = "super::channel::Column::Id"
+    )]
+    Channel,
+}
+
+impl Related<super::channel::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::Channel.def()
+    }
+}
+
+impl ActiveModelBehavior for ActiveModel {}

crates/collab2/collab/src/db/tables/channel_member.rs

@@ -0,0 +1,59 @@
+use crate::db::{channel_member, ChannelId, ChannelMemberId, ChannelRole, UserId};
+use sea_orm::entity::prelude::*;
+
+#[derive(Clone, Debug, PartialEq, Eq, DeriveEntityModel)]
+#[sea_orm(table_name = "channel_members")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    pub id: ChannelMemberId,
+    pub channel_id: ChannelId,
+    pub user_id: UserId,
+    pub accepted: bool,
+    pub role: ChannelRole,
+}
+
+impl ActiveModelBehavior for ActiveModel {}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {
+    #[sea_orm(
+        belongs_to = "super::channel::Entity",
+        from = "Column::ChannelId",
+        to = "super::channel::Column::Id"
+    )]
+    Channel,
+    #[sea_orm(
+        belongs_to = "super::user::Entity",
+        from = "Column::UserId",
+        to = "super::user::Column::Id"
+    )]
+    User,
+}
+
+impl Related<super::channel::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::Channel.def()
+    }
+}
+
+impl Related<super::user::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::User.def()
+    }
+}
+
+#[derive(Debug)]
+pub struct UserToChannel;
+
+impl Linked for UserToChannel {
+    type FromEntity = super::user::Entity;
+
+    type ToEntity = super::channel::Entity;
+
+    fn link(&self) -> Vec<RelationDef> {
+        vec![
+            channel_member::Relation::User.def().rev(),
+            channel_member::Relation::Channel.def(),
+        ]
+    }
+}

crates/collab2/collab/src/db/tables/channel_message.rs

@@ -0,0 +1,45 @@
+use crate::db::{ChannelId, MessageId, UserId};
+use sea_orm::entity::prelude::*;
+use time::PrimitiveDateTime;
+
+#[derive(Clone, Debug, PartialEq, Eq, DeriveEntityModel)]
+#[sea_orm(table_name = "channel_messages")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    pub id: MessageId,
+    pub channel_id: ChannelId,
+    pub sender_id: UserId,
+    pub body: String,
+    pub sent_at: PrimitiveDateTime,
+    pub nonce: Uuid,
+}
+
+impl ActiveModelBehavior for ActiveModel {}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {
+    #[sea_orm(
+        belongs_to = "super::channel::Entity",
+        from = "Column::ChannelId",
+        to = "super::channel::Column::Id"
+    )]
+    Channel,
+    #[sea_orm(
+        belongs_to = "super::user::Entity",
+        from = "Column::SenderId",
+        to = "super::user::Column::Id"
+    )]
+    Sender,
+}
+
+impl Related<super::channel::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::Channel.def()
+    }
+}
+
+impl Related<super::user::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::Sender.def()
+    }
+}

crates/collab2/collab/src/db/tables/channel_message_mention.rs

@@ -0,0 +1,43 @@
+use crate::db::{MessageId, UserId};
+use sea_orm::entity::prelude::*;
+
+#[derive(Clone, Debug, PartialEq, Eq, DeriveEntityModel)]
+#[sea_orm(table_name = "channel_message_mentions")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    pub message_id: MessageId,
+    #[sea_orm(primary_key)]
+    pub start_offset: i32,
+    pub end_offset: i32,
+    pub user_id: UserId,
+}
+
+impl ActiveModelBehavior for ActiveModel {}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {
+    #[sea_orm(
+        belongs_to = "super::channel_message::Entity",
+        from = "Column::MessageId",
+        to = "super::channel_message::Column::Id"
+    )]
+    Message,
+    #[sea_orm(
+        belongs_to = "super::user::Entity",
+        from = "Column::UserId",
+        to = "super::user::Column::Id"
+    )]
+    MentionedUser,
+}
+
+impl Related<super::channel::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::Message.def()
+    }
+}
+
+impl Related<super::user::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::MentionedUser.def()
+    }
+}

crates/collab2/collab/src/db/tables/contact.rs

@@ -0,0 +1,32 @@
+use crate::db::{ContactId, UserId};
+use sea_orm::entity::prelude::*;
+
+#[derive(Clone, Debug, Default, PartialEq, Eq, DeriveEntityModel)]
+#[sea_orm(table_name = "contacts")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    pub id: ContactId,
+    pub user_id_a: UserId,
+    pub user_id_b: UserId,
+    pub a_to_b: bool,
+    pub should_notify: bool,
+    pub accepted: bool,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {
+    #[sea_orm(
+        belongs_to = "super::room_participant::Entity",
+        from = "Column::UserIdA",
+        to = "super::room_participant::Column::UserId"
+    )]
+    UserARoomParticipant,
+    #[sea_orm(
+        belongs_to = "super::room_participant::Entity",
+        from = "Column::UserIdB",
+        to = "super::room_participant::Column::UserId"
+    )]
+    UserBRoomParticipant,
+}
+
+impl ActiveModelBehavior for ActiveModel {}

crates/collab2/collab/src/db/tables/feature_flag.rs

@@ -0,0 +1,40 @@
+use sea_orm::entity::prelude::*;
+
+use crate::db::FlagId;
+
+#[derive(Clone, Debug, PartialEq, Eq, DeriveEntityModel)]
+#[sea_orm(table_name = "feature_flags")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    pub id: FlagId,
+    pub flag: String,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {
+    #[sea_orm(has_many = "super::user_feature::Entity")]
+    UserFeature,
+}
+
+impl Related<super::user_feature::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::UserFeature.def()
+    }
+}
+
+impl ActiveModelBehavior for ActiveModel {}
+
+pub struct FlaggedUsers;
+
+impl Linked for FlaggedUsers {
+    type FromEntity = Entity;
+
+    type ToEntity = super::user::Entity;
+
+    fn link(&self) -> Vec<RelationDef> {
+        vec![
+            super::user_feature::Relation::Flag.def().rev(),
+            super::user_feature::Relation::User.def(),
+        ]
+    }
+}

crates/collab2/collab/src/db/tables/follower.rs

@@ -0,0 +1,50 @@
+use crate::db::{FollowerId, ProjectId, RoomId, ServerId};
+use rpc::ConnectionId;
+use sea_orm::entity::prelude::*;
+
+#[derive(Clone, Debug, Default, PartialEq, Eq, DeriveEntityModel)]
+#[sea_orm(table_name = "followers")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    pub id: FollowerId,
+    pub room_id: RoomId,
+    pub project_id: ProjectId,
+    pub leader_connection_server_id: ServerId,
+    pub leader_connection_id: i32,
+    pub follower_connection_server_id: ServerId,
+    pub follower_connection_id: i32,
+}
+
+impl Model {
+    pub fn leader_connection(&self) -> ConnectionId {
+        ConnectionId {
+            owner_id: self.leader_connection_server_id.0 as u32,
+            id: self.leader_connection_id as u32,
+        }
+    }
+
+    pub fn follower_connection(&self) -> ConnectionId {
+        ConnectionId {
+            owner_id: self.follower_connection_server_id.0 as u32,
+            id: self.follower_connection_id as u32,
+        }
+    }
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {
+    #[sea_orm(
+        belongs_to = "super::room::Entity",
+        from = "Column::RoomId",
+        to = "super::room::Column::Id"
+    )]
+    Room,
+}
+
+impl Related<super::room::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::Room.def()
+    }
+}
+
+impl ActiveModelBehavior for ActiveModel {}

crates/collab2/collab/src/db/tables/language_server.rs

@@ -0,0 +1,30 @@
+use crate::db::ProjectId;
+use sea_orm::entity::prelude::*;
+
+#[derive(Clone, Debug, PartialEq, Eq, DeriveEntityModel)]
+#[sea_orm(table_name = "language_servers")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    pub project_id: ProjectId,
+    #[sea_orm(primary_key)]
+    pub id: i64,
+    pub name: String,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {
+    #[sea_orm(
+        belongs_to = "super::project::Entity",
+        from = "Column::ProjectId",
+        to = "super::project::Column::Id"
+    )]
+    Project,
+}
+
+impl Related<super::project::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::Project.def()
+    }
+}
+
+impl ActiveModelBehavior for ActiveModel {}

crates/collab2/collab/src/db/tables/notification.rs

@@ -0,0 +1,29 @@
+use crate::db::{NotificationId, NotificationKindId, UserId};
+use sea_orm::entity::prelude::*;
+use time::PrimitiveDateTime;
+
+#[derive(Clone, Debug, PartialEq, Eq, DeriveEntityModel)]
+#[sea_orm(table_name = "notifications")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    pub id: NotificationId,
+    pub created_at: PrimitiveDateTime,
+    pub recipient_id: UserId,
+    pub kind: NotificationKindId,
+    pub entity_id: Option<i32>,
+    pub content: String,
+    pub is_read: bool,
+    pub response: Option<bool>,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {
+    #[sea_orm(
+        belongs_to = "super::user::Entity",
+        from = "Column::RecipientId",
+        to = "super::user::Column::Id"
+    )]
+    Recipient,
+}
+
+impl ActiveModelBehavior for ActiveModel {}

crates/collab2/collab/src/db/tables/notification_kind.rs

@@ -0,0 +1,15 @@
+use crate::db::NotificationKindId;
+use sea_orm::entity::prelude::*;
+
+#[derive(Clone, Debug, PartialEq, Eq, DeriveEntityModel)]
+#[sea_orm(table_name = "notification_kinds")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    pub id: NotificationKindId,
+    pub name: String,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {}
+
+impl ActiveModelBehavior for ActiveModel {}

crates/collab2/collab/src/db/tables/observed_buffer_edits.rs

@@ -0,0 +1,43 @@
+use crate::db::{BufferId, UserId};
+use sea_orm::entity::prelude::*;
+
+#[derive(Clone, Debug, PartialEq, Eq, DeriveEntityModel)]
+#[sea_orm(table_name = "observed_buffer_edits")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    pub user_id: UserId,
+    pub buffer_id: BufferId,
+    pub epoch: i32,
+    pub lamport_timestamp: i32,
+    pub replica_id: i32,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {
+    #[sea_orm(
+        belongs_to = "super::buffer::Entity",
+        from = "Column::BufferId",
+        to = "super::buffer::Column::Id"
+    )]
+    Buffer,
+    #[sea_orm(
+        belongs_to = "super::user::Entity",
+        from = "Column::UserId",
+        to = "super::user::Column::Id"
+    )]
+    User,
+}
+
+impl Related<super::buffer::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::Buffer.def()
+    }
+}
+
+impl Related<super::user::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::User.def()
+    }
+}
+
+impl ActiveModelBehavior for ActiveModel {}

crates/collab2/collab/src/db/tables/observed_channel_messages.rs

@@ -0,0 +1,41 @@
+use crate::db::{ChannelId, MessageId, UserId};
+use sea_orm::entity::prelude::*;
+
+#[derive(Clone, Debug, PartialEq, Eq, DeriveEntityModel)]
+#[sea_orm(table_name = "observed_channel_messages")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    pub user_id: UserId,
+    pub channel_id: ChannelId,
+    pub channel_message_id: MessageId,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {
+    #[sea_orm(
+        belongs_to = "super::channel::Entity",
+        from = "Column::ChannelId",
+        to = "super::channel::Column::Id"
+    )]
+    Channel,
+    #[sea_orm(
+        belongs_to = "super::user::Entity",
+        from = "Column::UserId",
+        to = "super::user::Column::Id"
+    )]
+    User,
+}
+
+impl Related<super::channel::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::Channel.def()
+    }
+}
+
+impl Related<super::user::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::User.def()
+    }
+}
+
+impl ActiveModelBehavior for ActiveModel {}

crates/collab2/collab/src/db/tables/project.rs

@@ -0,0 +1,84 @@
+use crate::db::{ProjectId, Result, RoomId, ServerId, UserId};
+use anyhow::anyhow;
+use rpc::ConnectionId;
+use sea_orm::entity::prelude::*;
+
+#[derive(Clone, Debug, PartialEq, Eq, DeriveEntityModel)]
+#[sea_orm(table_name = "projects")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    pub id: ProjectId,
+    pub room_id: RoomId,
+    pub host_user_id: UserId,
+    pub host_connection_id: Option<i32>,
+    pub host_connection_server_id: Option<ServerId>,
+}
+
+impl Model {
+    pub fn host_connection(&self) -> Result<ConnectionId> {
+        let host_connection_server_id = self
+            .host_connection_server_id
+            .ok_or_else(|| anyhow!("empty host_connection_server_id"))?;
+        let host_connection_id = self
+            .host_connection_id
+            .ok_or_else(|| anyhow!("empty host_connection_id"))?;
+        Ok(ConnectionId {
+            owner_id: host_connection_server_id.0 as u32,
+            id: host_connection_id as u32,
+        })
+    }
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {
+    #[sea_orm(
+        belongs_to = "super::user::Entity",
+        from = "Column::HostUserId",
+        to = "super::user::Column::Id"
+    )]
+    HostUser,
+    #[sea_orm(
+        belongs_to = "super::room::Entity",
+        from = "Column::RoomId",
+        to = "super::room::Column::Id"
+    )]
+    Room,
+    #[sea_orm(has_many = "super::worktree::Entity")]
+    Worktrees,
+    #[sea_orm(has_many = "super::project_collaborator::Entity")]
+    Collaborators,
+    #[sea_orm(has_many = "super::language_server::Entity")]
+    LanguageServers,
+}
+
+impl Related<super::user::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::HostUser.def()
+    }
+}
+
+impl Related<super::room::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::Room.def()
+    }
+}
+
+impl Related<super::worktree::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::Worktrees.def()
+    }
+}
+
+impl Related<super::project_collaborator::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::Collaborators.def()
+    }
+}
+
+impl Related<super::language_server::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::LanguageServers.def()
+    }
+}
+
+impl ActiveModelBehavior for ActiveModel {}

crates/collab2/collab/src/db/tables/project_collaborator.rs

@@ -0,0 +1,43 @@
+use crate::db::{ProjectCollaboratorId, ProjectId, ReplicaId, ServerId, UserId};
+use rpc::ConnectionId;
+use sea_orm::entity::prelude::*;
+
+#[derive(Clone, Debug, PartialEq, Eq, DeriveEntityModel)]
+#[sea_orm(table_name = "project_collaborators")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    pub id: ProjectCollaboratorId,
+    pub project_id: ProjectId,
+    pub connection_id: i32,
+    pub connection_server_id: ServerId,
+    pub user_id: UserId,
+    pub replica_id: ReplicaId,
+    pub is_host: bool,
+}
+
+impl Model {
+    pub fn connection(&self) -> ConnectionId {
+        ConnectionId {
+            owner_id: self.connection_server_id.0 as u32,
+            id: self.connection_id as u32,
+        }
+    }
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {
+    #[sea_orm(
+        belongs_to = "super::project::Entity",
+        from = "Column::ProjectId",
+        to = "super::project::Column::Id"
+    )]
+    Project,
+}
+
+impl Related<super::project::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::Project.def()
+    }
+}
+
+impl ActiveModelBehavior for ActiveModel {}

crates/collab2/collab/src/db/tables/room.rs

@@ -0,0 +1,54 @@
+use crate::db::{ChannelId, RoomId};
+use sea_orm::entity::prelude::*;
+
+#[derive(Clone, Default, Debug, PartialEq, Eq, DeriveEntityModel)]
+#[sea_orm(table_name = "rooms")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    pub id: RoomId,
+    pub live_kit_room: String,
+    pub channel_id: Option<ChannelId>,
+    pub enviroment: Option<String>,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {
+    #[sea_orm(has_many = "super::room_participant::Entity")]
+    RoomParticipant,
+    #[sea_orm(has_many = "super::project::Entity")]
+    Project,
+    #[sea_orm(has_many = "super::follower::Entity")]
+    Follower,
+    #[sea_orm(
+        belongs_to = "super::channel::Entity",
+        from = "Column::ChannelId",
+        to = "super::channel::Column::Id"
+    )]
+    Channel,
+}
+
+impl Related<super::room_participant::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::RoomParticipant.def()
+    }
+}
+
+impl Related<super::project::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::Project.def()
+    }
+}
+
+impl Related<super::follower::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::Follower.def()
+    }
+}
+
+impl Related<super::channel::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::Channel.def()
+    }
+}
+
+impl ActiveModelBehavior for ActiveModel {}

crates/collab2/collab/src/db/tables/room_participant.rs

@@ -0,0 +1,61 @@
+use crate::db::{ProjectId, RoomId, RoomParticipantId, ServerId, UserId};
+use rpc::ConnectionId;
+use sea_orm::entity::prelude::*;
+
+#[derive(Clone, Debug, PartialEq, Eq, DeriveEntityModel)]
+#[sea_orm(table_name = "room_participants")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    pub id: RoomParticipantId,
+    pub room_id: RoomId,
+    pub user_id: UserId,
+    pub answering_connection_id: Option<i32>,
+    pub answering_connection_server_id: Option<ServerId>,
+    pub answering_connection_lost: bool,
+    pub location_kind: Option<i32>,
+    pub location_project_id: Option<ProjectId>,
+    pub initial_project_id: Option<ProjectId>,
+    pub calling_user_id: UserId,
+    pub calling_connection_id: i32,
+    pub calling_connection_server_id: Option<ServerId>,
+    pub participant_index: Option<i32>,
+}
+
+impl Model {
+    pub fn answering_connection(&self) -> Option<ConnectionId> {
+        Some(ConnectionId {
+            owner_id: self.answering_connection_server_id?.0 as u32,
+            id: self.answering_connection_id? as u32,
+        })
+    }
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {
+    #[sea_orm(
+        belongs_to = "super::user::Entity",
+        from = "Column::UserId",
+        to = "super::user::Column::Id"
+    )]
+    User,
+    #[sea_orm(
+        belongs_to = "super::room::Entity",
+        from = "Column::RoomId",
+        to = "super::room::Column::Id"
+    )]
+    Room,
+}
+
+impl Related<super::user::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::User.def()
+    }
+}
+
+impl Related<super::room::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::Room.def()
+    }
+}
+
+impl ActiveModelBehavior for ActiveModel {}

crates/collab2/collab/src/db/tables/server.rs

@@ -0,0 +1,15 @@
+use crate::db::ServerId;
+use sea_orm::entity::prelude::*;
+
+#[derive(Clone, Debug, PartialEq, Eq, DeriveEntityModel)]
+#[sea_orm(table_name = "servers")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    pub id: ServerId,
+    pub environment: String,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {}
+
+impl ActiveModelBehavior for ActiveModel {}

crates/collab2/collab/src/db/tables/signup.rs

@@ -0,0 +1,28 @@
+use crate::db::{SignupId, UserId};
+use sea_orm::entity::prelude::*;
+
+#[derive(Clone, Debug, PartialEq, Eq, DeriveEntityModel)]
+#[sea_orm(table_name = "signups")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    pub id: SignupId,
+    pub email_address: String,
+    pub email_confirmation_code: String,
+    pub email_confirmation_sent: bool,
+    pub created_at: DateTime,
+    pub device_id: Option<String>,
+    pub user_id: Option<UserId>,
+    pub inviting_user_id: Option<UserId>,
+    pub platform_mac: bool,
+    pub platform_linux: bool,
+    pub platform_windows: bool,
+    pub platform_unknown: bool,
+    pub editor_features: Option<Vec<String>>,
+    pub programming_languages: Option<Vec<String>>,
+    pub added_to_mailing_list: bool,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {}
+
+impl ActiveModelBehavior for ActiveModel {}

crates/collab2/collab/src/db/tables/user.rs

@@ -0,0 +1,80 @@
+use crate::db::UserId;
+use sea_orm::entity::prelude::*;
+use serde::Serialize;
+
+#[derive(Clone, Debug, Default, PartialEq, Eq, DeriveEntityModel, Serialize)]
+#[sea_orm(table_name = "users")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    pub id: UserId,
+    pub github_login: String,
+    pub github_user_id: Option<i32>,
+    pub email_address: Option<String>,
+    pub admin: bool,
+    pub invite_code: Option<String>,
+    pub invite_count: i32,
+    pub inviter_id: Option<UserId>,
+    pub connected_once: bool,
+    pub metrics_id: Uuid,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {
+    #[sea_orm(has_many = "super::access_token::Entity")]
+    AccessToken,
+    #[sea_orm(has_one = "super::room_participant::Entity")]
+    RoomParticipant,
+    #[sea_orm(has_many = "super::project::Entity")]
+    HostedProjects,
+    #[sea_orm(has_many = "super::channel_member::Entity")]
+    ChannelMemberships,
+    #[sea_orm(has_many = "super::user_feature::Entity")]
+    UserFeatures,
+}
+
+impl Related<super::access_token::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::AccessToken.def()
+    }
+}
+
+impl Related<super::room_participant::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::RoomParticipant.def()
+    }
+}
+
+impl Related<super::project::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::HostedProjects.def()
+    }
+}
+
+impl Related<super::channel_member::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::ChannelMemberships.def()
+    }
+}
+
+impl Related<super::user_feature::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::UserFeatures.def()
+    }
+}
+
+impl ActiveModelBehavior for ActiveModel {}
+
+pub struct UserFlags;
+
+impl Linked for UserFlags {
+    type FromEntity = Entity;
+
+    type ToEntity = super::feature_flag::Entity;
+
+    fn link(&self) -> Vec<RelationDef> {
+        vec![
+            super::user_feature::Relation::User.def().rev(),
+            super::user_feature::Relation::Flag.def(),
+        ]
+    }
+}