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gaia/apps/communications/contacts/js/fb_loader.js

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+'use strict';
+/* global LazyLoader */
+/* exported fbLoader */
+
+var fbLoader = (function() {
+
+  var loaded = false;
+
+  var loadFb = function loadFb() {
+    if (loaded) {
+      return;
+    }
+
+    loaded = true;
+    var iframesFragment = document.createDocumentFragment();
+
+    var oauth = document.createElement('iframe');
+    oauth.id = 'iframe_oauth';
+    oauth.hidden = true;
+    iframesFragment.appendChild(oauth);
+
+    var extensions = document.createElement('iframe');
+    extensions.id = 'iframe_extensions';
+    iframesFragment.appendChild(extensions);
+
+    document.body.appendChild(iframesFragment);
+
+    var scripts = [
+      '/shared/js/contacts/import/utilities/misc.js',
+      '/shared/js/contacts/import/import_status_data.js',
+      '/contacts/js/service_extensions.js',
+      '/shared/pages/import/js/parameters.js',
+      '/shared/js/fb/fb_request.js',
+      '/shared/js/contacts/import/facebook/fb_data.js',
+      '/shared/js/contacts/import/facebook/fb_utils.js',
+      '/shared/js/contacts/import/facebook/fb_query.js',
+      '/shared/js/fb/fb_reader_utils.js',
+      '/shared/js/contacts/import/facebook/fb_contact_utils.js',
+      '/shared/js/contacts/import/facebook/fb_contact.js',
+      '/contacts/js/fb/fb_link.js',
+      '/contacts/js/fb/fb_messaging.js'
+    ];
+
+    LazyLoader.load(scripts, function() {
+      var event = new CustomEvent('facebookLoaded');
+      window.dispatchEvent(event);
+    });
+  };
+
+  return {
+    load: loadFb,
+    get loaded() { return loaded; }
+  };
+
+})();