From 34bb5f9928e88bec88ed0e3125f959b27dde7f56 Mon Sep 17 00:00:00 2001
From: Ajay Bura <ajbura@gmail.com>
Date: Sun, 9 Jan 2022 10:29:06 +0530
Subject: [PATCH] Fix error on room leave

Signed-off-by: Ajay Bura <ajbura@gmail.com>
---
 src/app/organisms/emoji-board/EmojiBoard.jsx | 44 ++++++++++----------
 src/client/state/navigation.js               |  2 +
 2 files changed, 24 insertions(+), 22 deletions(-)

diff --git a/src/app/organisms/emoji-board/EmojiBoard.jsx b/src/app/organisms/emoji-board/EmojiBoard.jsx
index a920387..7a13b69 100644
--- a/src/app/organisms/emoji-board/EmojiBoard.jsx
+++ b/src/app/organisms/emoji-board/EmojiBoard.jsx
@@ -188,29 +188,29 @@ function EmojiBoard({ onSelect }) {
 
   const [availableEmojis, setAvailableEmojis] = useState([]);
 
-  // This should be called whenever the room changes, so that we can switch out the emoji
-  // for whatever packs are relevant to this room
-  function updateAvailableEmoji(selectedRoomId) {
-    // Retrieve the packs for the new room
-    const packs = getRelevantPacks(
-      initMatrix.matrixClient.getRoom(selectedRoomId),
-    )
-    // Remove packs that aren't marked as emoji packs
-      .filter((pack) => pack.usage.indexOf('emoticon') !== -1)
-    // Remove packs without emojis
-      .filter((pack) => pack.getEmojis().length !== 0);
-
-    // Set an index for each pack so that we know where to jump when the user uses the nav
-    for (let i = 0; i < packs.length; i += 1) {
-      packs[i].packIndex = i;
-    }
-
-    // Update the component state
-    setAvailableEmojis(packs);
-  }
-
-  // Register the above function as an event listener
   useEffect(() => {
+    const updateAvailableEmoji = (selectedRoomId) => {
+      if (!selectedRoomId) {
+        setAvailableEmojis([]);
+        return;
+      }
+      // Retrieve the packs for the new room
+      // Remove packs that aren't marked as emoji packs
+      // Remove packs without emojis
+      const packs = getRelevantPacks(
+        initMatrix.matrixClient.getRoom(selectedRoomId),
+      )
+        .filter((pack) => pack.usage.indexOf('emoticon') !== -1)
+        .filter((pack) => pack.getEmojis().length !== 0);
+
+      // Set an index for each pack so that we know where to jump when the user uses the nav
+      for (let i = 0; i < packs.length; i += 1) {
+        packs[i].packIndex = i;
+      }
+
+      setAvailableEmojis(packs);
+    };
+
     navigation.on(cons.events.navigation.ROOM_SELECTED, updateAvailableEmoji);
     return () => {
       navigation.removeListener(cons.events.navigation.ROOM_SELECTED, updateAvailableEmoji);
diff --git a/src/client/state/navigation.js b/src/client/state/navigation.js
index fb8873e..c8c7b2a 100644
--- a/src/client/state/navigation.js
+++ b/src/client/state/navigation.js
@@ -73,6 +73,8 @@ class Navigation extends EventEmitter {
         this.emit(cons.events.navigation.SPACE_SELECTED, this.selectedSpaceId);
       },
       [cons.actions.navigation.SELECT_ROOM]: () => {
+        if (this.selectedRoomId === action.roomId) return;
+
         const prevSelectedRoomId = this.selectedRoomId;
         this.selectedRoomId = action.roomId;
         this.removeRecentRoom(prevSelectedRoomId);