Add a link that opens up a javascript prompt to allow you to use a different app id than myAppId if you want (#282)

Author: AndrewLane

public/assets/js/script.js

@@ -151,14 +151,14 @@ XHR.setCallback = function(callback, failureCallback) {
 XHR.POST = function(path, callback) {
   var seed = {"score":1337,"playerName":"Sean Plott","cheatMode":false}
   this.xhttp.open("POST", Config.getUrl() + path, true);
-  this.xhttp.setRequestHeader("X-Parse-Application-Id", "myAppId");
+  this.xhttp.setRequestHeader("X-Parse-Application-Id", $('#appId').val());
   this.xhttp.setRequestHeader("Content-type", "application/json");
   this.xhttp.send(JSON.stringify(seed));
 }
 
 XHR.GET = function(path, callback) {
   this.xhttp.open("GET", Config.getUrl() + path + '/' + Store.objectId, true);
-  this.xhttp.setRequestHeader("X-Parse-Application-Id", "myAppId");
+  this.xhttp.setRequestHeader("X-Parse-Application-Id", $('#appId').val());
   this.xhttp.setRequestHeader("Content-type", "application/json");
   this.xhttp.send(null);
 }

public/test.html

@@ -19,6 +19,9 @@
 
       <p class="up-and-running">Looks like our local Parse Serve is running under <span id="parse-url">...</span>. Let’s test it?
</p>
 
+      <p>We'll use an app id of "myAppId" to connect to Parse Server.  Or, you can 
+        <a href="javascript: var newAppId = prompt('What app id should we use to talk to Parse Server?');  if (newAppId) { $('#appId').val(newAppId); }">change it</a>.
+
       <p>We have an express server with Parse server running on top of it connected to a MongoDB.</p>
 
       <p>The following steps will try to save some data on parse server and then fetch it back. Hey ho?</p>
@@ -100,5 +103,6 @@
     </div>
     <script src="https://code.jquery.com/jquery-2.2.0.min.js"></script>
     <script src="/public/assets/js/script.js"></script>
+    <input type="hidden" id="appId" value="myAppId" />
   </body>
 </html>