'use strict';
(function(exports) {

  /**
   * Handles importing of blobs into the system app.
   * Currently supports the 'import-app' activity, which
   * installs a blob on the device if developer mode is enabled.
   */
  function Import() {}

  Import.prototype = {

    /**
     * Starts listening to activities.
     */
    start: function() {
      window.addEventListener('activity-import-app',
        this.handleActivity.bind(this));
    },

    /**
     * Imports an application into the system.
     */
    handleActivity: function(e) {
      var blob = e.detail.source.data.blob;
      navigator.mozApps.mgmt.import(blob)
        .then((addon) => {
          // Enable the addon by default.
          navigator.mozApps.mgmt.setEnabled(addon, true);
          e.detail.postResult({
            manifestURL: addon.manifestURL
          });
        })
        .catch((error) => {
          e.detail.postError(error);
        });
    }
  };

  exports.Import = Import;

}(window));