BF: Left room is still displayed as "Empty room" in rooms list

element-hq/element-ios/issues/2082

CHANGES.rst

@@ -13,6 +13,7 @@ Improvements:
 Bug fix:
 * MXEvent: Move `invite_room_state` to the correct place in the client-server API (vector-im/riot-ios/issues/2010).
 * MXRoomSummaryUpdater: Fix minor issue in updateSummaryAvatar method.
+* Left room is still displayed as "Empty room" in rooms list (vector-im/riot-ios/issues/2082).
 
 Changes in Matrix iOS SDK in 0.11.5 (2018-10-05)
 ===============================================

MatrixSDK/Data/MXEventTimeline.m

@@ -331,7 +331,11 @@ - (MXHTTPOperation *)paginate:(NSUInteger)numItems direction:(MXTimelineDirectio
 
         NSLog(@"[MXEventTimeline] paginate : got %tu messages from the server", paginatedResponse.chunk.count);
 
-        [self handlePaginationResponse:paginatedResponse direction:direction];
+        // Check if the room has not been left while waiting for the response
+        if ([self->room.mxSession hasRoomWithRoomId:self->room.roomId])
+        {
+            [self handlePaginationResponse:paginatedResponse direction:direction];
+        }
 
         // Inform the method caller
         complete();

MatrixSDK/Data/MXRoom.m

@@ -270,12 +270,16 @@ - (MXHTTPOperation*)members:(void (^)(MXRoomMembers *members))success
                     }
                     roomMemberEvents = updatedRoomMemberEvents;
 
-                    [liveTimeline handleLazyLoadedStateEvents:roomMemberEvents];
-
-                    [self.mxSession.store storeHasLoadedAllRoomMembersForRoom:self.roomId andValue:YES];
-                    if ([self.mxSession.store respondsToSelector:@selector(commit)])
+                    // Check if the room has not been left while waiting for the response
+                    if ([self.mxSession hasRoomWithRoomId:self.roomId])
                     {
-                        [self.mxSession.store commit];
+                        [liveTimeline handleLazyLoadedStateEvents:roomMemberEvents];
+
+                        [self.mxSession.store storeHasLoadedAllRoomMembersForRoom:self.roomId andValue:YES];
+                        if ([self.mxSession.store respondsToSelector:@selector(commit)])
+                        {
+                            [self.mxSession.store commit];
+                        }
                     }
 
                     // Provide the timelime to pending requesters

MatrixSDK/MXSession.h

@@ -749,6 +749,15 @@ typedef void (^MXOnBackgroundSyncFail)(NSError *error);
 
 
 #pragma mark - The user's rooms
+/**
+ Check if the user is in a room
+
+ @param roomId The room id to the room.
+
+ @return YES if they are.
+ */
+- (BOOL)hasRoomWithRoomId:(NSString*)roomId;
+
 /**
  Get the MXRoom instance of a room.
  

MatrixSDK/MXSession.m

@@ -1867,6 +1867,11 @@ - (MXHTTPOperation*)leaveRoom:(NSString*)roomId
 
 
 #pragma mark - The user's rooms
+- (BOOL)hasRoomWithRoomId:(NSString*)roomId
+{
+    return (rooms[roomId] != nil);
+}
+
 - (MXRoom *)roomWithRoomId:(NSString *)roomId
 {
     // sanity check

MatrixSDKTests/MXLazyLoadingTests.m

@@ -20,6 +20,7 @@
 #import "MXSDKOptions.h"
 
 #import "MXHTTPClient_Private.h"
+#import "MXFileStore.h"
 
 // Do not bother with retain cycles warnings in tests
 #pragma clang diagnostic push
@@ -790,6 +791,143 @@ - (void)testRoomAfterLeavingFromAnotherDeviceWithLazyLoadingOFF
 }
 
 
+// Complementary test to testRoomAfterLeavingFromAnotherDevice to check
+// the regression described at https://github.com/vector-im/riot-ios/issues/2082:
+// - Run the scenario
+// - Restart Alice session with a permanent store (MXFileStore)
+// - Alice requests all members from the HS
+// - and make a pagination request, because there is a bug here too
+// - Meanwhile, Alice leaves the room
+// - Close and reopen Alice session
+// -> Alice must not know the room anymore
+- (void)checkRoomAfterLeavingWithLazyLoading:(BOOL)lazyLoading
+{
+    // - Run the scenario
+    [self createScenarioWithLazyLoading:lazyLoading readyToTest:^(MXSession *aliceSession, MXSession *bobSession, MXSession *charlieSession, NSString *roomId, XCTestExpectation *expectation) {
+
+        MXRoom *room = [aliceSession roomWithRoomId:roomId];
+        MXRoomSummary *summary = [aliceSession roomSummaryWithRoomId:roomId];
+        XCTAssertNotNil(room);
+        XCTAssertNotNil(summary);
+
+        // - Restart Alice session with a permanent store (MXFileStore)
+        MXRestClient *aliceRestClient = aliceSession.matrixRestClient;
+        [aliceSession close];
+        aliceSession = nil;
+
+        MXFileStore *store = [[MXFileStore alloc] init];
+        __block MXSession *aliceSession2 = [[MXSession alloc] initWithMatrixRestClient:aliceRestClient];
+        [aliceSession2 setStore:store success:^{
+            [aliceSession2 start:^{
+
+                MXRoom *room2 = [aliceSession2 roomWithRoomId:roomId];
+                MXRoomSummary *summary2 = [aliceSession2 roomSummaryWithRoomId:roomId];
+                XCTAssertNotNil(room2);
+                XCTAssertNotNil(summary2);
+
+                [room2 liveTimeline:^(MXEventTimeline *liveTimeline) {
+
+                    // - Alice requests all members from the HS
+                    // Force [MXRoom members:] to make a request
+                    [aliceSession2.store storeHasLoadedAllRoomMembersForRoom:roomId andValue:NO];
+
+                    [MXHTTPClient setDelay:1000 toRequestsContainingString:@"/members"];
+                    [room2 members:^(MXRoomMembers *members) {
+
+                        MXRoom *room2a = [aliceSession2 roomWithRoomId:roomId];
+                        MXRoomSummary *summary2a = [aliceSession2 roomSummaryWithRoomId:roomId];
+                        XCTAssertNil(room2a);
+                        XCTAssertNil(summary2a);
+
+                    } failure:^(NSError *error) {
+                        XCTFail(@"Cannot set up intial test conditions - error: %@", error);
+                        [expectation fulfill];
+                    }];
+
+
+                    // - and a pagination request, because there is a bug here too
+                    [MXHTTPClient setDelay:1000 toRequestsContainingString:@"/messages"];
+                    [liveTimeline resetPagination];
+                    [liveTimeline paginate:30 direction:MXTimelineDirectionBackwards onlyFromStore:NO complete:^{
+
+                        MXRoom *room2a = [aliceSession2 roomWithRoomId:roomId];
+                        MXRoomSummary *summary2a = [aliceSession2 roomSummaryWithRoomId:roomId];
+                        XCTAssertNil(room2a);
+                        XCTAssertNil(summary2a);
+
+                    } failure:^(NSError *error) {
+                        XCTFail(@"Cannot set up intial test conditions - error: %@", error);
+                        [expectation fulfill];
+                    }];
+
+
+                    // - Meanwhile, she leaves the room
+                    [room2 leave:^{
+
+                        // Let time for the pagination to complete
+                        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, 2000 * USEC_PER_SEC), dispatch_get_main_queue(), ^{
+
+                            // Keep a ref to room2 so that requests on it can complete
+                            NSLog(@"%@", room2);
+
+                            MXRoom *room2b = [aliceSession2 roomWithRoomId:roomId];
+                            MXRoomSummary *summary2b = [aliceSession2 roomSummaryWithRoomId:roomId];
+                            XCTAssertNil(room2b);
+                            XCTAssertNil(summary2b);
+
+                            // - Close and reopen Alice session
+                            [aliceSession2 close];
+                            aliceSession2 = nil;
+
+                            MXFileStore *store = [[MXFileStore alloc] init];
+                            MXSession *aliceSession3 = [[MXSession alloc] initWithMatrixRestClient:aliceRestClient];
+                            [aliceSession3 setStore:store success:^{
+                                [aliceSession3 start:^{
+
+                                    // -> Alice must not know the room anymore
+                                    MXRoom *room3 = [aliceSession3 roomWithRoomId:roomId];
+                                    MXRoomSummary *summary3 = [aliceSession3 roomSummaryWithRoomId:roomId];
+                                    XCTAssertNil(room3);
+                                    XCTAssertNil(summary3);
+
+                                    [expectation fulfill];
+
+                                } failure:^(NSError *error) {
+                                    XCTFail(@"Cannot set up intial test conditions - error: %@", error);
+                                    [expectation fulfill];
+                                }];
+                            } failure:^(NSError *error) {
+                                XCTFail(@"Cannot set up intial test conditions - error: %@", error);
+                                [expectation fulfill];
+                            }];
+                        });
+                    } failure:^(NSError *error) {
+                        XCTFail(@"Cannot set up intial test conditions - error: %@", error);
+                        [expectation fulfill];
+                    }];
+                }];
+            } failure:^(NSError *error) {
+                XCTFail(@"Cannot set up intial test conditions - error: %@", error);
+                [expectation fulfill];
+            }];
+        } failure:^(NSError *error) {
+            XCTFail(@"Cannot set up intial test conditions - error: %@", error);
+            [expectation fulfill];
+        }];
+    }];
+}
+
+- (void)testRoomAfterLeaving
+{
+    [self checkRoomAfterLeavingWithLazyLoading:YES];
+}
+
+- (void)testRoomAfterLeavingWithLazyLoadingOFF
+{
+    [self checkRoomAfterLeavingWithLazyLoading:NO];
+}
+
+
 // roomSummary.membersCount must be right in both cases
 - (void)checkRoomSummaryMembersCountWithLazyLoading:(BOOL)lazyLoading
 {