From 7252c7c1da395370f8fce614e89730c6652d37b7 Mon Sep 17 00:00:00 2001
From: Liam Fitzgerald <liam@tlon.io>
Date: Mon, 13 Dec 2021 08:35:53 -0500
Subject: [PATCH] interface: fix unreads not clearing chats

Fixes urbit/landscape#761
---
 .../src/views/apps/chat/components/ChatWindow.tsx        | 9 +++++++++
 pkg/interface/src/views/components/VirtualScroller.tsx   | 8 ++++++++
 2 files changed, 17 insertions(+)

diff --git a/pkg/interface/src/views/apps/chat/components/ChatWindow.tsx b/pkg/interface/src/views/apps/chat/components/ChatWindow.tsx
index 5b10257ef..792967ac0 100644
--- a/pkg/interface/src/views/apps/chat/components/ChatWindow.tsx
+++ b/pkg/interface/src/views/apps/chat/components/ChatWindow.tsx
@@ -161,6 +161,14 @@ class ChatWindow extends Component<
     }
   }
 
+  onTopLoaded = () => {
+    const { graphSize, unreadCount } = this.props;
+    console.log(graphSize, unreadCount);
+    if(graphSize >= unreadCount) {
+      this.props.dismissUnread();
+    }
+  };
+
   onBottomLoaded = () => {
     if(this.state.unreadIndex.eq(bigInt.zero)) {
       this.calculateUnreadIndex();
@@ -274,6 +282,7 @@ class ChatWindow extends Component<
           origin='bottom'
           style={virtScrollerStyle}
           onBottomLoaded={this.onBottomLoaded}
+          onTopLoaded={this.onTopLoaded}
           // @ts-ignore paging @liam-fitzgerald on virtualscroller props
           onScroll={this.onScroll}
           data={graph}
diff --git a/pkg/interface/src/views/components/VirtualScroller.tsx b/pkg/interface/src/views/components/VirtualScroller.tsx
index 0201b17cf..cb406f2e7 100644
--- a/pkg/interface/src/views/components/VirtualScroller.tsx
+++ b/pkg/interface/src/views/components/VirtualScroller.tsx
@@ -90,6 +90,11 @@ export interface VirtualScrollerProps<K,V> {
    * Callback to execute when finished loading from start
   */
   onBottomLoaded?: () => void;
+  /*
+   * Callback to execute when finished loading from end
+  */
+  onTopLoaded?: () => void;
+
   /*
    * equality function for the key type
    */
@@ -413,6 +418,9 @@ export default class VirtualScroller<K,V> extends Component<VirtualScrollerProps
       if(newer && this.props.onBottomLoaded) {
         this.props.onBottomLoaded();
       }
+      if(!newer && this.props.onTopLoaded) {
+        this.props.onTopLoaded();
+      }
     }
   };