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gaia/apps/settings/js/modules/sync_manager_bridge.js

@@ -0,0 +1,83 @@
+define(function(require) {
+  'use strict';
+
+  var SyncManagerBridge = {
+    _port: null,
+    _requests: new Map(),
+
+    set onsyncchange(callback) {
+      this._onsyncchange = callback;
+    },
+
+    connect: function() {
+      if (this._port) {
+        return Promise.resolve(this._port);
+      }
+
+      return new Promise((resolve, reject) => {
+        navigator.mozApps.getSelf().onsuccess = event => {
+          var app = event.target.result;
+          app.connect('gaia-sync-management').then(ports => {
+            if (!ports || !ports.length) {
+              return reject();
+            }
+            this._port = ports[0];
+            this._port.onmessage = this.onmessage.bind(this);
+            resolve(this._port);
+          }).catch(reject);
+        };
+      });
+    },
+
+    iacRequest: function(request) {
+      return new Promise(resolve => {
+        this.connect().then(port => {
+          if (request.id) {
+            this._requests.set(request.id, resolve);
+          }
+          port.postMessage(request);
+        });
+      });
+    },
+
+    onmessage: function(event) {
+      var message = event.data;
+      if (!message) {
+        return;
+      }
+
+      if (message.id && this._requests.has(message.id)) {
+        this._requests.get(message.id)(message);
+        this._requests.delete(message.id);
+        return;
+      }
+
+      if (message.name !== 'onsyncchange') {
+        return;
+      }
+
+      if (this._onsyncchange) {
+        this._onsyncchange(message);
+      }
+    },
+
+    getInfo: function() {
+      return this.iacRequest({
+        name: 'getInfo',
+        id: Date.now()
+      });
+    },
+  };
+
+  ['enable',
+   'disable',
+   'sync'].forEach(requestName => {
+     SyncManagerBridge[requestName] = () => {
+       return SyncManagerBridge.iacRequest({
+         name: requestName
+       });
+     };
+  });
+
+  return SyncManagerBridge;
+});