gecko/toolkit/components/social/SocialService.jsm

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
 * You can obtain one at http://mozilla.org/MPL/2.0/. */

const EXPORTED_SYMBOLS = ["SocialService"];

const { classes: Cc, interfaces: Ci, utils: Cu } = Components;

Cu.import("resource://gre/modules/Services.jsm");
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
Cu.import("resource://gre/modules/SocialProvider.jsm");

const MANIFEST_PREFS = Services.prefs.getBranch("social.manifest.");

let SocialServiceInternal = {};

XPCOMUtils.defineLazyGetter(SocialServiceInternal, "providers", function () {
  let providers = {};
  let prefs = MANIFEST_PREFS.getChildList("", {});
  prefs.forEach(function (pref) {
    try {
      var manifest = JSON.parse(MANIFEST_PREFS.getCharPref(pref));
      if (manifest && typeof(manifest) == "object") {
        let provider = new SocialProvider(manifest);
        providers[provider.origin] = provider;
      }
    } catch (err) {
      Cu.reportError("SocialService: failed to load provider: " + pref +
                     ", exception: " + err);
    }
  }, this);

  return providers;
});

const SocialService = {
  getProvider: function getProvider(origin, onDone) {
    schedule((function () {
      onDone(SocialServiceInternal.providers[origin] || null);
    }).bind(this));
  },

  // Returns an array of installed provider origins.
  getProviderList: function getProviderList(onDone) {
    let providers = [p for each (p in SocialServiceInternal.providers)];
    schedule((function () {
      onDone(providers);
    }).bind(this));
  }
};

function schedule(callback) {
  Services.tm.mainThread.dispatch(callback, Ci.nsIThread.DISPATCH_NORMAL);
}