FBConnect = {
    /*
     * The facebook_onload statement is printed out in the PHP. If the user's logged in
     * status has changed since the last page load, then refresh the page to pick up
     * the change.
     *
     * This helps enforce the concept of "single sign on", so that if a user is signed into
     * Facebook when they visit your site, they will be automatically logged in -
     * without any need to click the login button.
     *
     * @param already_logged_into_facebook  reports whether the server thinks the user
     *                                      is logged in, based on their cookies
     *
     */
    onload : function (already_logged_into_facebook) {
      // user state is either: has a session, or does not.
      // if the state has changed, detect that and reload.
      FB.ensureInit(function() {
          FB.Facebook.get_sessionState().waitUntilReady(function(session) {
              var is_now_logged_into_facebook = session ? true : false;

              // if the new state is the same as the old (i.e., nothing changed)
              // then do nothing
              if (is_now_logged_into_facebook == already_logged_into_facebook) {
                return;
              }

              // otherwise, refresh to pick up the state change
              refresh_page();
            });
        });
    },

    /*
     * Our <fb:login-button> specifies this function in its onlogin attribute,
     * which is triggered after the user authenticates the app in the Connect
     * dialog and the Facebook session has been set in the cookies.
     */
    onlogin_ready : function() {
      // In this app, we redirect the user back to index.php. The server will read
      // the cookie and see that the user is logged in, and will deliver a new page
      // with content appropriate for a logged-in user.
      //
      // However, a more complex app could use this function to do AJAX calls
      // and/or in-place replacement of page contents to avoid a full page refresh.
      refresh_page();
    },

    /*
     * Do a page refresh after login state changes.
     * This is the easiest but not the only way to pick up changes.
     * If you have a small amount of Facebook-specific content on a large page,
     * then you could change it in Javascript without refresh.
     */
    refresh_page : function() {
      //window.location = 'index.php';
      location.reload();
    },

    /*
     * Prompts the user to grant a permission to the application.
     */
    prompt_permission : function (permission) {
      FB.ensureInit(function() {
        FB.Connect.showPermissionDialog(permission);
      });
    },

    /*
     * Show the feed form. This would be typically called in response to the
     * onclick handler of a "Publish" button, or in the onload event after
     * the user submits a form with info that should be published.
     *
     */
    publish_feed_story : function (form_bundle_id, template_data) {
      // Load the feed form
      FB.ensureInit(function() {
          FB.Connect.showFeedDialog(form_bundle_id, template_data);
          //FB.Connect.showFeedDialog(form_bundle_id, template_data, null, null, FB.FeedStorySize.shortStory, FB.RequireConnect.promptConnect);

          // hide the "Loading feed story ..." div
          // This doesn't work, probably because it is ran before the comments
          // div is created
          //$("div#comments div.form_msg.fb_publish").html("Published to Facebook");
          //ge('feed_loading').style.visibility = "hidden";
      });
    },

    /*
     * If a user is not connected, then the checkbox that says "Publish To Facebook"
     * is hidden in the "add run" form.
     *
     * This function detects whether the user is logged into facebook but just
     * not connected, and shows the checkbox if that's true.
     */
    show_feed_checkbox : function() {
      FB.ensureInit(function() {
          FB.Connect.get_status().waitUntilReady(function(status) {
              if (status != FB.ConnectState.userNotLoggedIn) {
                // If the user is currently logged into Facebook, but has not
                // authorized the app, then go ahead and show them the feed dialog + upsell
                checkbox = ge('publish_fb_checkbox');
                if (checkbox) {
                  checkbox.style.visibility = "visible";
                }
              }
            });
        });
    }
};