Mark older messages as read when we get out-of-order read receipt

FREEBIE

js/models/messages.js

@@ -457,6 +457,10 @@
                             }
                             if (readReceipt || message.isExpirationTimerUpdate()) {
                                 message.unset('unread');
+                                // This is primarily to allow the conversation to mark all older messages as
+                                //   read, as is done when we receive a read receipt for a message we already
+                                //   know about.
+                                Whisper.ReadReceipts.notifyConversation(message);
                             } else {
                                 conversation.set('unreadCount', conversation.get('unreadCount') + 1);
                             }

js/read_receipts.js

@@ -29,19 +29,21 @@
                 if (message) {
                     this.remove(receipt);
                     message.markRead(receipt.get('read_at')).then(function() {
-                        var conversation = ConversationController.get({
-                            id: message.get('conversationId')
-                        });
-
-                        if (conversation) {
-                            // notify frontend listeners
-                            conversation.onReadMessage(message);
-                        }
-                    });
+                        this.notifyConversation(message);
+                    }.bind(this));
                 } else {
                     console.log('No message for read receipt');
                 }
             }.bind(this));
-        }
+        },
+        notifyConversation: function(message) {
+            var conversation = ConversationController.get({
+                id: message.get('conversationId')
+            });
+
+            if (conversation) {
+                conversation.onReadMessage(message);
+            }
+        },
     }))();
 })();