Handle a connection issue when we try to start a new voice broadcast (#7276)

Riot/Modules/Room/RoomViewController.m

@@ -2454,13 +2454,19 @@ static CGSize kThreadListBarButtonItemImageSize;
     // Prevents listening a VB when recording a new one
     [VoiceBroadcastPlaybackProvider.shared pausePlaying];
     
+    // Check connectivity
+    if ([AppDelegate theDelegate].isOffline)
+    {
+        [self showAlertWithTitle:[VectorL10n voiceBroadcastConnectionErrorTitle] message:[VectorL10n voiceBroadcastConnectionErrorMessage]];
+        return;
+    }
+    
     // Request the voice broadcast service to start recording - No service is returned if someone else is already broadcasting in the room
     [session getOrCreateVoiceBroadcastServiceFor:self.roomDataSource.room completion:^(VoiceBroadcastService *voiceBroadcastService) {
         if (voiceBroadcastService) {
-            [voiceBroadcastService startVoiceBroadcastWithSuccess:^(NSString * _Nullable success) {
-            
-            } failure:^(NSError * _Nonnull error) {
-                
+            [voiceBroadcastService startVoiceBroadcastWithSuccess:^(NSString * _Nullable success) { } failure:^(NSError * _Nonnull error) {
+                [self showAlertWithTitle:[VectorL10n voiceBroadcastConnectionErrorTitle] message:[VectorL10n voiceBroadcastConnectionErrorMessage]];
+                [session tearDownVoiceBroadcastService];
             }];
         }
         else

Riot/Modules/VoiceBroadcast/VoiceBroadcastSDK/VoiceBroadcastService.swift

@@ -186,7 +186,7 @@ public class VoiceBroadcastService: NSObject {
                 return
             }
             
-            self.room.sendStateEvent(.custom(VoiceBroadcastSettings.voiceBroadcastInfoContentKeyType),
+            let httpOperation = self.room.sendStateEvent(.custom(VoiceBroadcastSettings.voiceBroadcastInfoContentKeyType),
                                      content: stateEventContent, stateKey: stateKey) { [weak self] response in
                 guard let self = self else { return }
                 
@@ -199,6 +199,9 @@ public class VoiceBroadcastService: NSObject {
                 }
                 taskCompleted()
             }
+            
+            // No retry to send the request
+            httpOperation.maxNumberOfTries = 0
         }
     }
 }