store and sort by m.lowpriority tag

src/domain/session/roomlist/RoomTileViewModel.js

@@ -73,6 +73,13 @@ export class RoomTileViewModel extends ViewModel {
             return result;
         }
         log(`comparing ${myRoom.name || theirRoom.id} and ${theirRoom.name || theirRoom.id} ...`);
+        log("comparing isLowPriority...");
+        if (myRoom.isLowPriority !== theirRoom.isLowPriority) {
+            if (myRoom.isLowPriority) {
+                return logResult(1);
+            }
+            return logResult(-1);
+        }
         log("comparing isUnread...");
         if (isSortedAsUnread(this) !== isSortedAsUnread(other)) {
             if (isSortedAsUnread(this)) {

src/matrix/room/Room.js

@@ -251,6 +251,11 @@ export class Room extends EventEmitter {
         return this._summary.highlightCount;
     }
 
+    get isLowPriority() {
+        const tags = this._summary.tags;
+        return !!(tags && tags['m.lowpriority']);
+    }
+
     async _getLastEventId() {
         const lastKey = this._syncWriter.lastMessageKey;
         if (lastKey) {

src/matrix/room/RoomSummary.js

@@ -22,6 +22,9 @@ function applySyncResponse(data, roomResponse, membership, isInitialSync, isTime
         data = data.cloneIfNeeded();
         data.membership = membership;
     }
+    if (roomResponse.account_data) {
+        data = roomResponse.account_data.events.reduce(processRoomAccountData, data);
+    }
     // state comes before timeline
     if (roomResponse.state) {
         data = roomResponse.state.events.reduce(processStateEvent, data);
@@ -51,6 +54,18 @@ function applySyncResponse(data, roomResponse, membership, isInitialSync, isTime
     return data;
 }
 
+function processRoomAccountData(data, event) {
+    if (event?.type === "m.tag") {
+        let tags = event?.content?.tags;
+        if (!tags || Array.isArray(tags) || typeof tags !== "object") {
+            tags = null;
+        }
+        data = data.cloneIfNeeded();
+        data.tags = tags;
+    }
+    return data;
+}
+
 function processStateEvent(data, event) {
     if (event.type === "m.room.encryption") {
         if (!data.isEncrypted) {
@@ -133,6 +148,7 @@ class SummaryData {
         this.avatarUrl = copy ? copy.avatarUrl : null;
         this.notificationCount = copy ? copy.notificationCount : 0;
         this.highlightCount = copy ? copy.highlightCount : 0;
+        this.tags = copy ? copy.tags : null;
         this.cloned = copy ? true : false;
     }
 
@@ -218,6 +234,10 @@ export class RoomSummary {
         return this._data.lastPaginationToken;
     }
 
+    get tags() {
+        return this._data.tags;
+    }
+
     writeClearUnread(txn) {
         const data = new SummaryData(this._data);
         data.isUnread = false;