feat: disable room retention feature (MESSENGER-6076)

Config/BWIBuildSettings.swift

@@ -770,4 +770,7 @@ class BWIBuildSettings: NSObject {
     
     // MARK: Enable NSFW filter
     var enableNSFWFilter = false
+    
+    // MARK: Enable Room Retention
+    var enableRoomRetention = false
 }

Riot/Categories/MXRoomSummary.swift

@@ -48,10 +48,15 @@ extension MXRoomSummary {
     ///
     /// Provide a boolean telling whether some data have been removed.
     @objc func removeExpiredRoomContentsFromStore() -> Bool {
-        let ret = self.mxSession.store.removeAllMessagesSent(before: self.minimumTimestamp(), inRoom: roomId)
-        if ret {
-            NotificationCenter.default.post(name: .roomSummaryDidRemoveExpiredDataFromStore, object: self)
+        // BWI: #6076 the retention should be handled by the server, it is not necessary to filter messages locally on room level
+        if BWIBuildSettings.shared.enableRoomRetention {
+            let ret = self.mxSession.store.removeAllMessagesSent(before: self.minimumTimestamp(), inRoom: roomId)
+            if ret {
+                NotificationCenter.default.post(name: .roomSummaryDidRemoveExpiredDataFromStore, object: self)
+            }
+            return ret
+        } else {
+            return false
         }
-        return ret
     }
 }