Bugfix. Don't create view for chat which fails validation

Use-case is when an invalid MUC gets opened in singleton mode.
Without this fix a new chat with spinner appears, even though it
shouldn't.

src/converse-muc-views.js

@@ -2152,6 +2152,7 @@ converse.plugins.add('converse-muc-views', {
             }
         }
 
+
         /************************ BEGIN Event Handlers ************************/
         _converse.api.listen.on('chatBoxViewsInitialized', () => {
 
@@ -2161,12 +2162,16 @@ converse.plugins.add('converse-muc-views', {
             }
             _converse.chatboxviews.delegate('click', 'a.open-chatroom', openChatRoomFromURIClicked);
 
-            const that = _converse.chatboxviews;
-            _converse.chatboxes.on('add', item => {
-                if (!that.get(item.get('id')) && item.get('type') === _converse.CHATROOMS_TYPE) {
-                    return that.add(item.get('id'), new _converse.ChatRoomView({'model': item}));
+            function addView (model) {
+                const views = _converse.chatboxviews;
+                if (!views.get(model.get('id')) &&
+                        model.get('type') === _converse.CHATROOMS_TYPE &&
+                        model.isValid()
+                ) {
+                    return views.add(model.get('id'), new _converse.ChatRoomView({'model': model}));
                 }
-            });
+            }
+            _converse.chatboxes.on('add', addView);
         });
 
         _converse.api.listen.on('clearSession', () => {

src/headless/converse-chatboxes.js

@@ -372,9 +372,12 @@ converse.plugins.add('converse-chatboxes', {
                 if (!attrs.jid) {
                     return 'Ignored ChatBox without JID';
                 }
-                const auto_join = _converse.auto_join_private_chats.concat(_converse.auto_join_rooms);
+                const room_jids = _converse.auto_join_rooms.map(s => _.isObject(s) ? s.jid : s);
+                const auto_join = _converse.auto_join_private_chats.concat(room_jids);
                 if (_converse.singleton && !_.includes(auto_join, attrs.jid)) {
-                    return "Ignored ChatBox that's not being auto joined in singleton mode";
+                    const msg = `${attrs.jid} is not allowed because singleton is true and it's not being auto_joined`;
+                    _converse.log(msg, Strophe.LogLevel.WARN);
+                    return msg;
                 }
             },
 
@@ -1119,6 +1122,10 @@ converse.plugins.add('converse-chatboxes', {
                             _converse.log(response.responseText);
                         }
                     });
+                    if (!chatbox.isValid()) {
+                        chatbox.destroy();
+                        return null;
+                    }
                 }
                 return chatbox;
             }
@@ -1269,9 +1276,15 @@ converse.plugins.add('converse-chatboxes', {
 
                     if (_.isString(jids)) {
                         const chat = await _converse.api.chats.create(jids, attrs);
+                        if (chat) {
                             return chat.maybeShow(force);
+                        }
+                        return chat;
                     } else if (Array.isArray(jids)) {
-                        return Promise.all(jids.map(j => _converse.api.chats.create(j, attrs).then(c => c.maybeShow(force))));
+                        return Promise.all(
+                            jids.map(j => _converse.api.chats.create(j, attrs).then(c => c ? c.maybeShow(force) : null))
+                                .filter(c => c)
+                        );
                     }
                     const err_msg = "chats.open: You need to provide at least one JID";
                     _converse.log(err_msg, Strophe.LogLevel.ERROR);

src/headless/converse-muc.js

@@ -1837,14 +1837,18 @@ converse.plugins.add('converse-muc', {
                  *     }
                  * );
                  */
-                'open': async function (jids, attrs, force=false) {
+                async open (jids, attrs, force=false) {
                     await _converse.api.waitUntil('chatBoxesFetched');
                     if (_.isUndefined(jids)) {
                         const err_msg = 'rooms.open: You need to provide at least one JID';
                         _converse.log(err_msg, Strophe.LogLevel.ERROR);
                         throw(new TypeError(err_msg));
                     } else if (_.isString(jids)) {
-                        return _converse.api.rooms.create(jids, attrs).maybeShow(force);
+                        const room = _converse.api.rooms.create(jids, attrs);
+                        if (room) {
+                            room.maybeShow(force);
+                        }
+                        return room;
                     } else {
                         return _.map(jids, jid => _converse.api.rooms.create(jid, attrs).maybeShow(force));
                     }
@@ -1873,7 +1877,7 @@ converse.plugins.add('converse-muc', {
                  *     )
                  * });
                  */
-                'get' (jids, attrs, create) {
+                get (jids, attrs, create) {
                     if (_.isString(attrs)) {
                         attrs = {'nick': attrs};
                     } else if (_.isUndefined(attrs)) {