Clean up /logout command flow and errors (#4918)

webapp/actions/global_actions.jsx

@@ -476,15 +476,7 @@ export function emitUserLoggedOutEvent(redirectTo = '/', shouldSignalLogout = tr
                 BrowserStore.signalLogout();
             }
 
-            BrowserStore.clear();
-            ErrorStore.clearLastError();
-            PreferenceStore.clear();
-            UserStore.clear();
-            TeamStore.clear();
-            newLocalizationSelected(global.window.mm_config.DefaultClientLocale);
-            stopPeriodicStatusUpdates();
-            WebsocketActions.close();
-            browserHistory.push(redirectTo);
+            clientLogout(redirectTo);
         },
         () => {
             browserHistory.push(redirectTo);
@@ -492,6 +484,18 @@ export function emitUserLoggedOutEvent(redirectTo = '/', shouldSignalLogout = tr
     );
 }
 
+export function clientLogout(redirectTo = '/') {
+    BrowserStore.clear();
+    ErrorStore.clearLastError();
+    PreferenceStore.clear();
+    UserStore.clear();
+    TeamStore.clear();
+    newLocalizationSelected(global.window.mm_config.DefaultClientLocale);
+    stopPeriodicStatusUpdates();
+    WebsocketActions.close();
+    browserHistory.push(redirectTo);
+}
+
 export function emitSearchMentionsEvent(user) {
     let terms = '';
     if (user.notify_props && user.notify_props.mention_keys) {

webapp/components/create_post.jsx

@@ -125,6 +125,11 @@ export default class CreatePost extends React.Component {
                 (data) => {
                     this.setState({submitting: false});
 
+                    if (post.message.trim() === '/logout') {
+                        GlobalActions.clientLogout(data.goto_location);
+                        return;
+                    }
+
                     if (data.goto_location && data.goto_location.length > 0) {
                         browserHistory.push(data.goto_location);
                     }