Separated the join instructions into a executeJoinCommand method

src/domain/session/room/RoomViewModel.js

@@ -198,15 +198,7 @@ export class RoomViewModel extends ViewModel {
         }
     }
     
-    async _processCommand (message) {
+    async executeJoinCommand(args) {
-        let msgtype = undefined;
-        const [commandName, ...args] = message.substring(1).split(" ");
-        switch (commandName) {
-            case "me":
-                message = args.join(" ");
-                msgtype = "m.emote";
-                break;
-            case "join":
         if (args.length == 1) {
             let roomName = args[0];
             try {
@@ -231,6 +223,18 @@ export class RoomViewModel extends ViewModel {
             this._timelineError = null;
             this.emitChange("error");
         }
+    }
+    
+    async _processCommand (message) {
+        let msgtype = undefined;
+        const [commandName, ...args] = message.substring(1).split(" ");
+        switch (commandName) {
+            case "me":
+                message = args.join(" ");
+                msgtype = "m.emote";
+                break;
+            case "join":
+                await this.executeJoinCommand(args);
                 break;
             case "shrug":
                 message = "¯\\_(ツ)_/¯ " + args.join(" ");