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gaia/apps/communications/contacts/js/service_extensions.js

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+'use strict';
+/* exported extServices*/
+/* global fb */
+/* global utils */
+
+(function(exports) {
+  var onContactsImportedCb = null;
+  var extServices = {
+    set onContactsImported(cb) {
+      if (typeof cb !== 'function') {
+        return;
+      }
+      onContactsImportedCb = cb;
+    }
+  };
+
+  var extensionFrame = document.querySelector('#iframe_extensions');
+  var oauthFrame = document.querySelector('#iframe_oauth');
+  oauthFrame.src = '/shared/pages/import/oauth.html';
+  var currentURI, access_token;
+  var canClose = true, canCloseLogout = true;
+  var closeRequested = false;
+
+  extServices.importGmail = function(evt) {
+    loadService('gmail');
+  };
+
+  extServices.importLive = function(evt) {
+    loadService('live');
+  };
+
+  function loadService(serviceName) {
+    closeRequested = false;
+    canClose = false;
+    canCloseLogout = false;
+    load('/shared/pages/import/import.html?service=' + serviceName,
+         'friends', serviceName);
+  }
+
+  function load(uri, from, serviceName) {
+    oauthFrame.contentWindow.postMessage({
+      type: 'start',
+      data: {
+        from: from,
+        service: serviceName
+      }
+    }, fb.CONTACTS_APP_ORIGIN);
+    currentURI = uri;
+  }
+
+  function unload() {
+    // Attaching again scrolling handlers on the contact list's image loader
+    window.dispatchEvent(new CustomEvent('image-loader-resume'));
+    extensionFrame.src = currentURI = null;
+  }
+
+  function close(messageId, additionalMessageId) {
+    // Aborting the close if was closed previously, ie: no contacts
+    if (!extensionFrame.classList.contains('opening')) {
+      return;
+    }
+    extensionFrame.addEventListener('transitionend', function tclose() {
+      extensionFrame.removeEventListener('transitionend', tclose);
+      extensionFrame.classList.add('hidden');
+      if (canClose === true && canCloseLogout === true) {
+        unload();
+      }
+      else {
+        closeRequested = true;
+      }
+
+      if (messageId) {
+        utils.status.show(messageId, additionalMessageId);
+      }
+    // Otherwise we do nothing as the sync process will finish sooner or later
+    });
+    extensionFrame.classList.remove('opening');
+  }
+
+  function notifySettings(evtype) {
+    // Notify observers that a change from FB could have happened
+    var eventType = evtype || 'fb_changed';
+
+    var event = new CustomEvent(eventType, {
+      'detail' : true
+    });
+
+    document.dispatchEvent(event);
+  }
+
+  // This function can also be executed when other messages arrive
+  // That's why we cannot call notifySettings outside the switch block
+  function messageHandler(e) {
+    if (!currentURI || e.origin !== fb.CONTACTS_APP_ORIGIN) {
+      return;
+    }
+
+    var data = e.data;
+
+    switch (data.type) {
+      case 'ready':
+        extensionFrame.classList.remove('hidden');
+        window.setTimeout(function displaying() {
+          extensionFrame.classList.add('opening');
+          extensionFrame.addEventListener('transitionend', function topen() {
+            extensionFrame.removeEventListener('transitionend', topen);
+            extensionFrame.contentWindow.postMessage({
+              type: 'dom_transition_end',
+              data: ''
+            }, fb.CONTACTS_APP_ORIGIN);
+            // Stop scrolling listeners on the contact list's image loader to
+            // prevent images cancelled while friends are being imported
+            window.dispatchEvent(new CustomEvent('image-loader-pause'));
+          });
+        }, 0);
+      break;
+
+      case 'authenticated':
+        extensionFrame.src = currentURI;
+        access_token = data.data;
+      break;
+
+      case 'token_stored':
+        notifySettings('fb_token_ready');
+      break;
+
+      case 'token_error':
+        notifySettings('fb_token_error');
+      break;
+
+      case 'abort':
+        unload();
+      break;
+
+      case 'window_close':
+        close(data.messageId, data.additionalMessageId);
+        notifySettings();
+      break;
+
+      case 'import_updated':
+        extensionFrame.contentWindow.postMessage({
+            type: 'contacts_loaded',
+            data: ''
+          }, fb.CONTACTS_APP_ORIGIN);
+        if (onContactsImportedCb) {
+          onContactsImportedCb();
+          onContactsImportedCb = null;
+        }
+      break;
+
+      case 'sync_finished':
+        // Sync finished thus the iframe can be safely "removed"
+        canClose = true;
+        if (closeRequested && canCloseLogout) {
+          unload();
+        }
+
+        // Check whether there has been changes or not
+        if (data.data > 0) {
+          notifySettings();
+        }
+      break;
+
+      case 'logout_finished':
+        canCloseLogout = true;
+        if (closeRequested && canClose) {
+          unload();
+        }
+      break;
+
+      case 'messaging_ready':
+        extensionFrame.contentWindow.postMessage({
+          type: 'token',
+          data: access_token
+        }, fb.CONTACTS_APP_ORIGIN);
+        break;
+
+    }
+  }
+
+  window.addEventListener('message', messageHandler);
+
+  exports.ExtServices = extServices;
+
+}(window));