Move embed.js to public

public/javascripts/embed.js

@@ -0,0 +1,27 @@
+/* global discourseUrl */
+/* global discourseEmbedUrl */
+(function() {
+
+  var comments = document.getElementById('discourse-comments'),
+      iframe = document.createElement('iframe');
+  iframe.src = discourseUrl + "embed/best?embed_url=" + encodeURIComponent(discourseEmbedUrl);
+  iframe.id = 'discourse-embed-frame';
+  iframe.width = "100%";
+  iframe.frameBorder = "0";
+  iframe.scrolling = "no";
+  comments.appendChild(iframe);
+
+
+  function postMessageReceived(e) {
+    if (!e) { return; }
+    if (discourseUrl.indexOf(e.origin) === -1) { return; }
+
+    if (e.data) {
+      if (e.data.type === 'discourse-resize' && e.data.height) {
+        iframe.height = e.data.height + "px";
+      }
+    }
+  }
+  window.addEventListener('message', postMessageReceived, false);
+
+})();