From 8d1265748348d90d673ecd4c4f5cf6cfc3b07d63 Mon Sep 17 00:00:00 2001
From: Travis Ralston <travpc@gmail.com>
Date: Wed, 29 Jan 2020 11:14:33 +0000
Subject: [PATCH] Filter event types when deciding on activity metrics for DM
 suggestions

Fixes https://github.com/vector-im/riot-web/issues/12083
---
 src/components/views/dialogs/InviteDialog.js | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/src/components/views/dialogs/InviteDialog.js b/src/components/views/dialogs/InviteDialog.js
index de11dbf9fa..a911abbf76 100644
--- a/src/components/views/dialogs/InviteDialog.js
+++ b/src/components/views/dialogs/InviteDialog.js
@@ -351,9 +351,19 @@ export default class InviteDialog extends React.PureComponent {
                 continue;
             }
 
-            const lastEventTs = room.timeline && room.timeline.length
-                ? room.timeline[room.timeline.length - 1].getTs()
-                : 0;
+            // Find the last timestamp for a message event
+            const searchTypes = ["m.room.message", "m.room.encrypted", "m.sticker"];
+            const maxSearchEvents = 20; // to prevent traversing history
+            let lastEventTs = 0;
+            if (room.timeline && room.timeline.length) {
+                for (let i = room.timeline.length - 1; i >= 0; i--) {
+                    const ev = room.timeline[i];
+                    if (searchTypes.includes(ev.getType())) {
+                        lastEventTs = ev.getTs();
+                    }
+                    if (room.timeline.length - i > maxSearchEvents) break;
+                }
+            }
             if (!lastEventTs) {
                 // something weird is going on with this room
                 console.warn(`[Invite:Recents] ${userId} (${room.roomId}) has a weird last timestamp: ${lastEventTs}`);