Revert "Call MatrixClient.clearStores on logout"

This reverts commit c3d37c1ff9.

This commit was introducing a bug where no rooms would be shown if
you want straight to /#/login and logged in (because this causes
a guest session to be created but the indexeddb store not to be
cleared, so the new login picks up the stale indexedb sync data.

src/Lifecycle.js

@@ -237,7 +237,7 @@ function _handleRestoreFailure(e) {
             + ' This is a once off; sorry for the inconvenience.',
         );
 
-        _clearStorage();
+        _clearLocalStorage();
 
         return q.reject(new Error(
             _t('Unable to restore previous session') + ': ' + msg,
@@ -258,7 +258,7 @@ function _handleRestoreFailure(e) {
     return def.promise.then((success) => {
         if (success) {
             // user clicked continue.
-            _clearStorage();
+            _clearLocalStorage();
             return false;
         }
 
@@ -332,10 +332,6 @@ export function setLoggedIn(credentials) {
     }
 
     // stop any running clients before we create a new one with these new credentials
-    //
-    // XXX: why do we have any running clients here? Maybe on sign-in after
-    // initial use as a guest? but what about our persistent storage? we need to
-    // be careful not to leak e2e data created as one user into another session.
     stopMatrixClient();
 
     MatrixClientPeg.replaceUsingCreds(credentials);
@@ -406,19 +402,13 @@ export function startMatrixClient() {
  * a session has been logged out / ended.
  */
 export function onLoggedOut() {
-    stopMatrixClient(true);
+    _clearLocalStorage();
+    stopMatrixClient();
     dis.dispatch({action: 'on_logged_out'});
 }
 
-function _clearStorage() {
+function _clearLocalStorage() {
     Analytics.logout();
-
-    const cli = MatrixClientPeg.get();
-    if (cli) {
-        // TODO: *really* ought to wait for the promise to complete
-        cli.clearStores().done();
-    }
-
     if (!window.localStorage) {
         return;
     }
@@ -435,13 +425,9 @@ function _clearStorage() {
 }
 
 /**
- * Stop all the background processes related to the current client.
+ * Stop all the background processes related to the current client
- *
- * Optionally clears persistent stores.
- *
- * @param {boolean} clearStores true to clear the persistent stores.
  */
-export function stopMatrixClient(clearStores) {
+export function stopMatrixClient() {
     Notifier.stop();
     UserActivity.stop();
     Presence.stop();
@@ -450,13 +436,7 @@ export function stopMatrixClient(clearStores) {
     if (cli) {
         cli.stopClient();
         cli.removeAllListeners();
+        cli.store.deleteAllData();
+        MatrixClientPeg.unset();
     }
-
-    if (clearStores) {
-        // note that we have to do this *after* stopping the client, but
-        // *before* clearing the MatrixClientPeg.
-        _clearStorage();
-    }
-
-    MatrixClientPeg.unset();
 }

src/components/structures/MatrixChat.js

@@ -292,7 +292,7 @@ module.exports = React.createClass({
     },
 
     componentWillUnmount: function() {
-        Lifecycle.stopMatrixClient(false);
+        Lifecycle.stopMatrixClient();
         dis.unregister(this.dispatcherRef);
         UDEHandler.stopListening();
         window.removeEventListener("focus", this.onFocus);
@@ -364,7 +364,7 @@ module.exports = React.createClass({
                 // is completed in another browser, we'll be 401ed for using
                 // a guest access token for a non-guest account.
                 // It will be restarted in onReturnToGuestClick
-                Lifecycle.stopMatrixClient(false);
+                Lifecycle.stopMatrixClient();
 
                 this.notifyNewScreen('register');
                 break;