Member Panel - PR 3 - Update powerlevels from state event

src/matrix/room/Room.js

@@ -23,6 +23,7 @@ import {WrappedError} from "../error.js"
 import {Heroes} from "./members/Heroes.js";
 import {AttachmentUpload} from "./AttachmentUpload.js";
 import {DecryptionSource} from "../e2ee/common.js";
+import {PowerLevels, EVENT_TYPE as POWERLEVELS_EVENT_TYPE } from "./timeline/PowerLevels.js";
 
 const EVENT_ENCRYPTED_TYPE = "m.room.encrypted";
 
@@ -173,6 +174,7 @@ export class Room extends BaseRoom {
         if (Array.isArray(roomResponse.timeline?.events)) {
             removedPendingEvents = await this._sendQueue.removeRemoteEchos(roomResponse.timeline.events, txn, log);
         }
+        const powerLevelsEvent = this._getPowerLevelsEvent(roomResponse);
         return {
             summaryChanges,
             roomEncryption,
@@ -182,6 +184,7 @@ export class Room extends BaseRoom {
             removedPendingEvents,
             memberChanges,
             heroChanges,
+            powerLevelsEvent,
             shouldFlushKeyShares,
         };
     }
@@ -194,7 +197,7 @@ export class Room extends BaseRoom {
     afterSync(changes, log) {
         const {
             summaryChanges, newEntries, updatedEntries, newLiveKey,
-            removedPendingEvents, memberChanges,
+            removedPendingEvents, memberChanges, powerLevelsEvent,
             heroChanges, roomEncryption
         } = changes;
         log.set("id", this.id);
@@ -236,6 +239,9 @@ export class Room extends BaseRoom {
                 emitChange = true;
             }
         }
+        if (powerLevelsEvent) {
+            this._updatePowerLevels(powerLevelsEvent);
+        }
         if (emitChange) {
             this._emitUpdate();
         }
@@ -262,6 +268,23 @@ export class Room extends BaseRoom {
         }
     }
 
+    _getPowerLevelsEvent(roomResponse) {
+        const isPowerlevelEvent = event => event.state_key === "" && event.type === POWERLEVELS_EVENT_TYPE;
+        const powerLevelEvent = roomResponse.timeline?.events.find(isPowerlevelEvent) ?? roomResponse.state?.events.find(isPowerlevelEvent);
+        return powerLevelEvent;
+    }
+
+    _updatePowerLevels(powerLevelEvent) {
+        if (this._powerLevels) {
+            const newPowerLevels = new PowerLevels({
+                powerLevelEvent,
+                ownUserId: this._user.id,
+                membership: this.membership,
+            });
+            this._powerLevels.set(newPowerLevels);
+        }
+    }
+
     needsAfterSyncCompleted({shouldFlushKeyShares}) {
         return shouldFlushKeyShares;
     }

src/matrix/room/timeline/PowerLevels.js

@@ -14,6 +14,8 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
+export const EVENT_TYPE = "m.room.power_levels";
+
 export class PowerLevels {
     constructor({powerLevelEvent, createEvent, ownUserId, membership}) {
         this._plEvent = powerLevelEvent;