Bugfix. Don't include .chat-events, to avoid null reference

spec/chatbox.js

@@ -972,7 +972,7 @@
                                     'to': _converse.bare_jid,
                                     'from': sender_jid,
                                     'type': 'chat'})
-                                .c('body').t("message from today")
+                                .c('body').t("message")
                                 .tree();
                         _converse.chatboxes.onMessage(msg);
 
@@ -996,7 +996,7 @@
                                     'to': _converse.bare_jid,
                                     'from': sender_jid,
                                     'type': 'chat'})
-                                .c('body').t("Inbetween message")
+                                .c('body').t("Inbetween message").up()
                                 .tree();
                         _converse.chatboxes.onMessage(msg);
 
@@ -1020,7 +1020,7 @@
                                     'to': _converse.bare_jid,
                                     'from': sender_jid,
                                     'type': 'chat'})
-                                .c('body').t("An earlier message today")
+                                .c('body').t("An earlier message on the next day")
                                 .tree();
                         _converse.chatboxes.onMessage(msg);
 
@@ -1032,7 +1032,31 @@
                                     'to': _converse.bare_jid,
                                     'from': sender_jid,
                                     'type': 'chat'})
-                                .c('body').t("newer message from today")
+                                .c('body').t("newer message from the next day")
+                                .tree();
+                        _converse.chatboxes.onMessage(msg);
+
+                        // Insert <composing> message, to also check that
+                        // text messages are inserted correctly with
+                        // temporary chat events in the chat contents.
+                        msg = $msg({
+                                'id': 'aeb219',
+                                'to': _converse.bare_jid,
+                                'xmlns': 'jabber:client',
+                                'from': sender_jid,
+                                'type': 'chat'})
+                            .c('composing', {'xmlns': Strophe.NS.CHATSTATES}).up()
+                            .tree();
+                        _converse.chatboxes.onMessage(msg);
+
+                        msg = $msg({
+                                'id': 'aeb220',
+                                'to': _converse.bare_jid,
+                                'xmlns': 'jabber:client',
+                                'from': sender_jid,
+                                'type': 'chat'})
+                            .c('composing', {'xmlns': Strophe.NS.CHATSTATES}).up()
+                            .c('body').t("latest message")
                             .tree();
                         _converse.chatboxes.onMessage(msg);
 
@@ -1041,7 +1065,7 @@
                         chatboxview.clearSpinner(); //cleanup
 
                         var $time = $chat_content.find('time');
-                        expect($time.length).toEqual(3);
+                        expect($time.length).toEqual(4);
                         $time = $chat_content.find('time:first');
                         expect($time.data('isodate')).toEqual('2017-12-31T00:00:00+00:00');
 
@@ -1058,15 +1082,19 @@
                         $el = $chat_content.find('.chat-message:eq(2)');
                         expect($el.find('.chat-msg-content').text()).toEqual('another inbetween message');
 
-                        $time = $chat_content.find('time:last');
+                        $time = $chat_content.find('time:nth(2)');
                         expect($time.data('isodate')).toEqual('2018-01-02T00:00:00+00:00');
-                        expect($time[0].nextElementSibling.querySelector('.chat-msg-content').textContent).toBe('An earlier message today');
+                        expect($time[0].nextElementSibling.querySelector('.chat-msg-content').textContent).toBe('An earlier message on the next day');
                         $el = $chat_content.find('.chat-message:eq(3)');
-                        expect($el.find('.chat-msg-content').text()).toEqual('An earlier message today');
+                        expect($el.find('.chat-msg-content').text()).toEqual('An earlier message on the next day');
 
                         $el = $chat_content.find('.chat-message:eq(4)');
-                        expect($el.find('.chat-msg-content').text()).toEqual('message from today');
-                        expect($el[0].nextElementSibling.querySelector('.chat-msg-content').textContent).toEqual('newer message from today');
+                        expect($el.find('.chat-msg-content').text()).toEqual('message');
+                        expect($el[0].nextElementSibling.querySelector('.chat-msg-content').textContent).toEqual('newer message from the next day');
+
+                        $time = $chat_content.find('time:last');
+                        expect($time.data('isodate')).toEqual(moment().startOf('day').format());
+                        expect($time[0].nextElementSibling.querySelector('.chat-msg-content').textContent).toBe('latest message');
                         done();
                     });
                 }));

src/converse-chatview.js

@@ -468,8 +468,14 @@
                     if (_.isNull(most_recent_date) || moment(most_recent_date).isBefore(cutoff)) {
                         return most_recent_date;
                     }
+                    /* XXX: Besides .chat-message and .chat-date elements, there are also
+                     * .chat-event elements. These are however temporary and
+                     * removed once a new element is inserted into the chat
+                     * area, so we don't query for them here, otherwise we get
+                     * a null reference later upon element insertion.
+                     */
                     const msg_dates = _.invokeMap(
-                        sizzle('.message, .chat-info', this.content),
+                        sizzle('.chat-message, .chat-date', this.content),
                         Element.prototype.getAttribute, 'data-isodate'
                     )
                     if (_.isObject(cutoff)) {
@@ -621,6 +627,7 @@
                     } else if (message.get('chat_state') === _converse.GONE) {
                         this.showStatusNotification(message.get('fullname')+' '+__('has gone away'));
                     }
+                    return message;
                 },
 
                 shouldShowOnTextMessage () {
@@ -674,11 +681,14 @@
                     }
                     if (message.get('type') === 'error') {
                         this.handleErrorMessage(message);
-                    } else if (!message.get('message')) {
-                        this.handleChatStateMessage(message);
                     } else {
+                        if (message.get('chat_state')) {
+                            this.handleChatStateMessage(message);
+                        }
+                        if (message.get('message')) {
                             this.handleTextMessage(message);
                         }
+                    }
                     _converse.emit('messageAdded', {
                         'message': message,
                         'chatbox': this.model