Add attributes to filesystem events (#8767)

close #8200

Changelog:
- add: `attributes` field to the file event notification

docs/language-server/protocol-language-server.md

@@ -2350,6 +2350,7 @@ of the (possibly multiple) content roots.
 interface FileEventNotification {
   path: Path;
   kind: FileEventKind;
+  attributes?: FileAttributes;
 }
 ```
 

engine/language-server/src/main/scala/org/enso/languageserver/filemanager/FileEvent.scala

@@ -8,8 +8,13 @@ import org.enso.filewatcher.Watcher
   *
   * @param path path to the file system object
   * @param kind type of file system event
+  * @param attributes the file attributes
   */
-case class FileEvent(path: Path, kind: FileEventKind)
+case class FileEvent(
+  path: Path,
+  kind: FileEventKind,
+  attributes: Either[FileSystemFailure, FileAttributes]
+)
 
 object FileEvent {
 
@@ -18,21 +23,27 @@ object FileEvent {
     * @param root a project root
     * @param base a watched path
     * @param event a file system event
+    * @param attributes a file attributes
     * @return file event
     */
   def fromWatcherEvent(
     root: File,
     base: Path,
-    event: Watcher.WatcherEvent
-  ): FileEvent =
+    event: Watcher.WatcherEvent,
+    attributes: Either[FileSystemFailure, FileSystemApi.Attributes]
+  ): FileEvent = {
+    val eventPath = Path.getRelativePath(root, base, event.path)
     FileEvent(
-      Path.getRelativePath(root, base, event.path),
-      FileEventKind(event.eventType)
+      eventPath,
+      FileEventKind(event.eventType),
+      attributes.map(
+        FileAttributes.fromFileSystemAttributes(root, eventPath, _)
+      )
     )
   }
+}
 
-/** Type of a file event.
-  */
+/** Type of a file event. */
 sealed trait FileEventKind extends EnumEntry
 
 object FileEventKind extends Enum[FileEventKind] with CirceEnum[FileEventKind] {

engine/language-server/src/main/scala/org/enso/languageserver/filemanager/FileManagerApi.scala

@@ -183,7 +183,11 @@ object FileManagerApi {
 
   case object EventFile extends Method("file/event") {
 
-    case class Params(path: Path, kind: FileEventKind)
+    case class Params(
+      path: Path,
+      kind: FileEventKind,
+      attributes: Option[FileAttributes]
+    )
 
     implicit val hasParams: HasParams.Aux[this.type, EventFile.Params] =
       new HasParams[this.type] {

engine/language-server/src/main/scala/org/enso/languageserver/filemanager/PathWatcher.scala

@@ -140,7 +140,17 @@ final class PathWatcher(
 
     case e: Watcher.WatcherEvent =>
       restartCounter.reset()
-      val event = FileEvent.fromWatcherEvent(root, base, e)
+
+      val fileInfo =
+        if (e.eventType == Watcher.EventTypeDelete) ZIO.fail(FileNotFound)
+        else fs.info(e.path.toFile)
+
+      exec
+        .exec(fileInfo)
+        .map(FileEvent.fromWatcherEvent(root, base, e, _))
+        .pipeTo(self)
+
+    case event: FileEvent =>
       clients.foreach(_ ! FileEventResult(event))
       context.system.eventStream.publish(event)
 

engine/language-server/src/main/scala/org/enso/languageserver/protocol/json/JsonConnectionController.scala

@@ -354,13 +354,16 @@ class JsonConnectionController(
         FileModifiedOnDisk.Params(path)
       )
 
-    case TextProtocol.FileEvent(path, event) =>
-      webActor ! Notification(EventFile, EventFile.Params(path, event))
+    case TextProtocol.FileEvent(path, event, attributes) =>
+      webActor ! Notification(
+        EventFile,
+        EventFile.Params(path, event, attributes)
+      )
 
     case PathWatcherProtocol.FileEventResult(event) =>
       webActor ! Notification(
         EventFile,
-        EventFile.Params(event.path, event.kind)
+        EventFile.Params(event.path, event.kind, event.attributes.toOption)
       )
 
     case ContextRegistryProtocol

engine/language-server/src/main/scala/org/enso/languageserver/text/BufferRegistry.scala

@@ -215,7 +215,7 @@ class BufferRegistry(
         registry
       )
 
-    case msg @ FileEvent(path, kind) =>
+    case msg @ FileEvent(path, kind, _) =>
       if (kind == FileEventKind.Added || kind == FileEventKind.Modified) {
         registry.get(path).foreach { buffer =>
           buffer ! msg

engine/language-server/src/main/scala/org/enso/languageserver/text/CollaborativeBuffer.scala

@@ -324,36 +324,9 @@ class CollaborativeBuffer(
         )
       )
 
-    case FileEvent(path, _) =>
-      fileManager ! FileManagerProtocol.InfoFile(path)
-      val timeoutCancellable = context.system.scheduler.scheduleOnce(
-        timingsConfig.requestTimeout,
-        self,
-        IOTimeout
-      )
-      context.become(
-        waitingOnFileEventContent(
-          path,
-          buffer,
-          timeoutCancellable,
-          clients,
-          lockHolder,
-          autoSave
-        )
-      )
-
-  }
-
-  private def waitingOnFileEventContent(
-    path: Path,
-    buffer: Buffer,
-    timeoutCancellable: Cancellable,
-    clients: Map[ClientId, JsonSession],
-    lockHolder: Option[JsonSession],
-    autoSave: Map[ClientId, (ContentVersion, Cancellable)]
-  ): Receive = {
-    case FileManagerProtocol.InfoFileResult(Right(attrs)) =>
-      timeoutCancellable.cancel()
+    case FileEvent(path, _, attributes) =>
+      attributes match {
+        case Right(attrs) =>
           val newBuffer = buffer.fileWithMetadata.lastModifiedTime.map {
             bufferLastModifiedTime =>
               if (attrs.lastModifiedTime.isAfter(bufferLastModifiedTime)) {
@@ -367,7 +340,6 @@ class CollaborativeBuffer(
                 buffer
               }
           }
-      unstashAll()
           context.become(
             collaborativeEditing(
               newBuffer.getOrElse(buffer),
@@ -376,29 +348,13 @@ class CollaborativeBuffer(
               autoSave
             )
           )
-
-    case FileManagerProtocol.InfoFileResult(Left(err)) =>
-      timeoutCancellable.cancel()
-      logger.error("Failed to read file attributes for [{}]. {}", path, err)
-      unstashAll()
-      context.become(
-        collaborativeEditing(buffer, clients, lockHolder, autoSave)
+        case Left(failure) =>
+          logger.error(
+            "Failed to read file attributes for [{}]. {}",
+            path,
+            failure
           )
-
-    case Status.Failure(ex) =>
-      logger.error("Failed to read file attributes for [{}].", path, ex)
-      unstashAll()
-      context.become(
-        collaborativeEditing(buffer, clients, lockHolder, autoSave)
-      )
-
-    case IOTimeout =>
-      unstashAll()
-      context.become(
-        collaborativeEditing(buffer, clients, lockHolder, autoSave)
-      )
-
-    case _ => stash()
+      }
   }
 
   private def waitingOnReloadedContent(
@@ -444,7 +400,11 @@ class CollaborativeBuffer(
 
     case FileManagerProtocol.ReadFileWithAttributesResult(Left(FileNotFound)) =>
       clients.values.foreach {
-        _.rpcController ! TextProtocol.FileEvent(path, FileEventKind.Removed)
+        _.rpcController ! TextProtocol.FileEvent(
+          path,
+          FileEventKind.Removed,
+          None
+        )
       }
       replyTo ! ReloadedBuffer(path)
       timeoutCancellable.cancel()

engine/language-server/src/main/scala/org/enso/languageserver/text/TextProtocol.scala

@@ -2,6 +2,7 @@ package org.enso.languageserver.text
 
 import org.enso.languageserver.data.{CapabilityRegistration, ClientId}
 import org.enso.languageserver.filemanager.{
+  FileAttributes,
   FileEventKind,
   FileSystemFailure,
   Path
@@ -151,8 +152,14 @@ object TextProtocol {
     * a file event after reloading the buffer to sync with file system
     *
     * @param path path to the file
+    * @param kind file event kind
+    * @param attributes file attributes
     */
-  case class FileEvent(path: Path, event: FileEventKind)
+  case class FileEvent(
+    path: Path,
+    kind: FileEventKind,
+    attributes: Option[FileAttributes]
+  )
 
   /** Requests the language server to save a file on behalf of a given user.
     *

engine/language-server/src/test/scala/org/enso/languageserver/websocket/json/ReceivesTreeUpdatesHandlerTest.scala

@@ -84,7 +84,7 @@ class ReceivesTreeUpdatesHandlerTest
       // create file
       val path = Paths.get(testContentRoot.file.toString, "oneone.txt")
       Files.createFile(path)
-      client1.expectJson(json"""
+      client1.fuzzyExpectJson(json"""
           { "jsonrpc": "2.0",
             "method": "file/event",
             "params": {
@@ -92,11 +92,12 @@ class ReceivesTreeUpdatesHandlerTest
                   "rootId": $testContentRootId,
                   "segments": [ "oneone.txt" ]
                },
-               "kind": "Added"
+               "kind": "Added",
+               "attributes": "*"
              }
           }
           """)
-      client2.expectJson(json"""
+      client2.fuzzyExpectJson(json"""
           { "jsonrpc": "2.0",
             "method": "file/event",
             "params": {
@@ -104,14 +105,15 @@ class ReceivesTreeUpdatesHandlerTest
                   "rootId": $testContentRootId,
                   "segments": [ "oneone.txt" ]
                },
-               "kind": "Added"
+               "kind": "Added",
+               "attributes": "*"
              }
           }
           """)
 
       // update file
       Files.write(path, "Hello".getBytes())
-      client1.expectJson(json"""
+      client1.fuzzyExpectJson(json"""
           { "jsonrpc": "2.0",
             "method": "file/event",
             "params": {
@@ -119,11 +121,12 @@ class ReceivesTreeUpdatesHandlerTest
                   "rootId": $testContentRootId,
                   "segments": [ "oneone.txt" ]
                },
-               "kind": "Modified"
+               "kind": "Modified",
+               "attributes": "*"
              }
           }
           """)
-      client2.expectJson(json"""
+      client2.fuzzyExpectJson(json"""
           { "jsonrpc": "2.0",
             "method": "file/event",
             "params": {
@@ -131,7 +134,8 @@ class ReceivesTreeUpdatesHandlerTest
                   "rootId": $testContentRootId,
                   "segments": [ "oneone.txt" ]
                },
-               "kind": "Modified"
+               "kind": "Modified",
+               "attributes": "*"
              }
           }
           """)
@@ -150,7 +154,8 @@ class ReceivesTreeUpdatesHandlerTest
                   "rootId": $testContentRootId,
                   "segments": [ "oneone.txt" ]
                },
-               "kind": "Removed"
+               "kind": "Removed",
+               "attributes": null
              }
           }
           """)

engine/language-server/src/test/scala/org/enso/languageserver/websocket/json/VcsManagerTest.scala

@@ -1324,7 +1324,8 @@ class VcsManagerTest
                   $testBarFileName
                 ]
               },
-              "kind" : "Removed"
+              "kind" : "Removed",
+              "attributes" : null
             }
           }
           """
@@ -1354,7 +1355,8 @@ class VcsManagerTest
                   $testBarFileName
                 ]
               },
-              "kind" : "Removed"
+              "kind" : "Removed",
+              "attributes" : null
             }
           }
           """)