EventFormatter: Sender avatar handling

Override senderAvatarURLForEvent to ignore the identicons defined by default in mattrix kit.

Vector/Utils/EventFormatter.m

@@ -58,6 +58,31 @@
              };
 }
 
+#pragma mark event sender info
+
+- (NSString*)senderAvatarUrlForEvent:(MXEvent*)event withRoomState:(MXRoomState*)roomState
+{
+    // Override this method to ignore the identicons defined by default in matrix kit.
+    
+    // Consider first the avatar url defined in provided room state (Note: this room state is supposed to not take the new event into account)
+    NSString *senderAvatarUrl = [roomState memberWithUserId:event.sender].avatarUrl;
+    
+    // Check whether this avatar url is updated by the current event (This happens in case of new joined member)
+    if ([event.content[@"avatar_url"] length])
+    {
+        // Use the actual avatar
+        senderAvatarUrl = event.content[@"avatar_url"];
+    }
+    
+    // We ignore non mxc avatar url (The identicons are removed here).
+    if (senderAvatarUrl && [senderAvatarUrl hasPrefix:kMXContentUriScheme] == NO)
+    {
+        senderAvatarUrl = nil;
+    }
+    
+    return senderAvatarUrl;
+}
+
 
 #pragma mark - Timestamp formatting