Fix race in registration for pusher config

we no longer immediately create the MatrixClient, so don't assume we do.

src/Lifecycle.js

@@ -294,10 +294,12 @@ export function initRtsClient(url) {
  * storage before starting the new client.
  *
  * @param {MatrixClientCreds} credentials The credentials to use
+ *
+ * @returns {Promise} promise which resolves to the new MatrixClient once it has been started
  */
 export function setLoggedIn(credentials) {
     stopMatrixClient();
-    _doSetLoggedIn(credentials, true);
+    return _doSetLoggedIn(credentials, true);
 }
 
 /**
@@ -307,7 +309,7 @@ export function setLoggedIn(credentials) {
  * @param {MatrixClientCreds} credentials
  * @param {Boolean} clearStorage
  *
- * returns a Promise which resolves once the client has been started
+ * @returns {Promise} promise which resolves to the new MatrixClient once it has been started
  */
 async function _doSetLoggedIn(credentials, clearStorage) {
     credentials.guest = Boolean(credentials.guest);
@@ -374,6 +376,7 @@ async function _doSetLoggedIn(credentials, clearStorage) {
     });
 
     startMatrixClient();
+    return MatrixClientPeg.get();
 }
 
 function _persistCredentialsToLocalStorage(credentials) {

src/components/structures/MatrixChat.js

@@ -1280,13 +1280,14 @@ module.exports = React.createClass({
         }
     },
 
+    // returns a promise which resolves to the new MatrixClient
     onRegistered: function(credentials, teamToken) {
         // XXX: These both should be in state or ideally store(s) because we risk not
         //      rendering the most up-to-date view of state otherwise.
         // teamToken may not be truthy
         this._teamToken = teamToken;
         this._is_registered = true;
-        Lifecycle.setLoggedIn(credentials);
+        return Lifecycle.setLoggedIn(credentials);
     },
 
     onFinishPostRegistration: function() {

src/components/structures/login/Registration.js

@@ -218,29 +218,29 @@ module.exports = React.createClass({
         }
 
         trackPromise.then((teamToken) => {
-            this.props.onLoggedIn({
+            return this.props.onLoggedIn({
                 userId: response.user_id,
                 deviceId: response.device_id,
                 homeserverUrl: this._matrixClient.getHomeserverUrl(),
                 identityServerUrl: this._matrixClient.getIdentityServerUrl(),
                 accessToken: response.access_token
             }, teamToken);
-        }).then(() => {
-            return this._setupPushers();
+        }).then((cli) => {
+            return this._setupPushers(cli);
         });
     },
 
-    _setupPushers: function() {
+    _setupPushers: function(matrixClient) {
         if (!this.props.brand) {
             return q();
         }
-        return MatrixClientPeg.get().getPushers().then((resp)=>{
+        return matrixClient.getPushers().then((resp)=>{
             const pushers = resp.pushers;
             for (let i = 0; i < pushers.length; ++i) {
                 if (pushers[i].kind == 'email') {
                     const emailPusher = pushers[i];
                     emailPusher.data = { brand: this.props.brand };
-                    MatrixClientPeg.get().setPusher(emailPusher).done(() => {
+                    matrixClient.setPusher(emailPusher).done(() => {
                         console.log("Set email branding to " + this.props.brand);
                     }, (error) => {
                         console.error("Couldn't set email branding: " + error);