From 98f4df14a496ef7b5b007771e659d9882a32332d Mon Sep 17 00:00:00 2001
From: Logan Allen <logan@tlon.io>
Date: Fri, 10 Apr 2020 22:22:14 +0000
Subject: [PATCH] chat-js: made scrollback work for new message indexing

---
 pkg/interface/chat/src/js/components/chat.js      | 10 +++++-----
 pkg/interface/chat/src/js/reducers/chat-update.js |  2 --
 2 files changed, 5 insertions(+), 7 deletions(-)

diff --git a/pkg/interface/chat/src/js/components/chat.js b/pkg/interface/chat/src/js/components/chat.js
index e596e66d6d..cf5ba89368 100644
--- a/pkg/interface/chat/src/js/components/chat.js
+++ b/pkg/interface/chat/src/js/components/chat.js
@@ -75,8 +75,7 @@ export class ChatScreen extends Component {
 
       props.history.push("/~chat");
     } else if (
-      props.envelopes.length - prevProps.envelopes.length >=
-      200
+      props.envelopes.length >= prevProps.envelopes.length + 10
     ) {
       this.hasAskedForMessages = false;
     }
@@ -107,11 +106,12 @@ export class ChatScreen extends Component {
       return;
     }
 
-    let start = props.envelopes[props.envelopes.length - 1].number;
+    let start =
+      props.length - props.envelopes[props.envelopes.length - 1].number;
     if (start > 0) {
-      let end = start + 200 < props.length ? start + 200 : props.length;
+      let end = start + 300 < props.length ? start + 300 : props.length;
       this.hasAskedForMessages = true;
-      props.subscription.fetchMessages(start, end, props.station);
+      props.subscription.fetchMessages(start + 1, end, props.station);
     }
   }
  
diff --git a/pkg/interface/chat/src/js/reducers/chat-update.js b/pkg/interface/chat/src/js/reducers/chat-update.js
index 270e3723d4..7ded8c4437 100644
--- a/pkg/interface/chat/src/js/reducers/chat-update.js
+++ b/pkg/interface/chat/src/js/reducers/chat-update.js
@@ -28,8 +28,6 @@ export class ChatUpdateReducer {
     if (data) {
       state.inbox[data.path].envelopes =
         state.inbox[data.path].envelopes.concat(data.envelopes);
-      state.inbox[data.path].config.length =
-        state.inbox[data.path].config.length + data.envelopes.length;
     }
   }