// This function called by facebook's javascript when it is loaded. // http://developers.facebook.com/docs/reference/javascript/ window.fbAsyncInit = function() { FB.init(Drupal.settings.fb.fb_init_settings); FB.XFBML.parse(); // Async function to complete init, only if session state is unknown. // (Avoid doing this when third-party cookies disabled.) if (!Drupal.settings.fb.fb_init_settings.session) { FB.getLoginStatus(function(response) { var status = {'session' : response.session, 'response': response}; jQuery.event.trigger('fb_init', status); // Trigger event for third-party modules. FB_JS.sessionChange(response); FB_JS.eventSubscribe(); }); } else { jQuery.event.trigger('fb_init', {'session' : Drupal.settings.fb.fb_init_settings.session}); // Trigger event for third-party modules. FB_JS.eventSubscribe(); FB_JS.sessionSanityCheck(); } }; FB_JS = function(){}; /** * Tell facebook to notify us of events we may need to act on. */ FB_JS.eventSubscribe = function() { // Use FB.Event to detect Connect login/logout. FB.Event.subscribe('auth.sessionChange', FB_JS.sessionChange); // Q: what the heck is "edge.create"? A: the like button was clicked. FB.Event.subscribe('edge.create', FB_JS.edgeCreate); // Other events that may be of interest... //FB.Event.subscribe('auth.login', FB_JS.debugHandler); //FB.Event.subscribe('auth.logout', FB_JS.debugHandler); //FB.Event.subscribe('auth.statusChange', FB_JS.debugHandler); //FB.Event.subscribe('auth.sessionChange', FB_JS.debugHandler); } /** * Helper parses URL params. * * http://jquery-howto.blogspot.com/2009/09/get-url-parameters-values-with-jquery.html */ FB_JS.getUrlVars = function(href) { var vars = [], hash; var hashes = href.slice(href.indexOf('?') + 1).split('&'); for(var i = 0; i < hashes.length; i++) { hash = hashes[i].split('='); vars[hash[0]] = hash[1]; if (hash[0] != '_fb_js_fbu') vars.push(hashes[i]); // i.e. "foo=bar" } return vars; } /** * Reload the current page, whether on canvas page or facebook connect. */ FB_JS.reload = function(destination) { // Determine fbu. var session = FB.getSession(); var fbu; if (session != null) fbu = session.uid; else fbu = 0; // Avoid infinite reloads ///@TODO - does not work on iframe because facebook does not pass url args to canvas frame when cookies not accepted. http://forum.developers.facebook.net/viewtopic.php?id=77236 var vars = FB_JS.getUrlVars(window.location.href); if (vars._fb_js_fbu == fbu) { return; // Do not reload (again) } // Determine where to send user. if (typeof(destination) != 'undefined' && destination) { // Use destination passed in. } else if (typeof(Drupal.settings.fb.reload_url) != 'undefined') { destination = Drupal.settings.fb.reload_url; } else { destination = window.location.href; } // Split and parse destination var path; if (destination.indexOf('?') == -1) { vars = []; path = destination; } else { vars = FB_JS.getUrlVars(destination); path = destination.substr(0, destination.indexOf('?')); } // Add _fb_js_fbu to params before reload. vars.push('_fb_js_fbu=' + fbu); // Use window.top for iframe canvas pages. destination = path + '?' + vars.join('&'); if(Drupal.settings.fb.reload_url_fragment) { destination = destination + "#" + Drupal.settings.fb.reload_url_fragment; } window.top.location = destination; //alert(destination); }; // Facebook pseudo-event handlers. FB_JS.sessionChange = function(response) { if (response.status == 'unknown') { // @TODO can we test if third-party cookies are disabled? } var status = {'changed': false, 'fbu': null, 'session': response.session, 'response' : response}; if (response.session) { status.fbu = response.session.uid; if (Drupal.settings.fb.fbu != status.fbu) { // A user has logged in. status.changed = true; } } else if (Drupal.settings.fb.fbu) { // A user has logged out. status.changed = true; // Sometimes Facebook's invalid cookies are left around. Let's try to clean up their crap. // Can get left behind when third-party cookies disabled. FB_JS.deleteCookie('fbs_' + Drupal.settings.fb.apikey, '/', ''); } if (status.changed) { // fbu has changed since server built the page. jQuery.event.trigger('fb_session_change', status); // Remember the fbu. Drupal.settings.fb.fbu = status.fbu; } }; FB_JS.edgeCreate = function(href, widget) { var status = {'href': href}; FB_JS.ajaxEvent('edge.create', status); }; // Helper function for developers. FB_JS.debugHandler = function(response) { debugger; }; // JQuery pseudo-event handler. FB_JS.sessionChangeHandler = function(context, status) { // Pass data to ajax event. var data = { 'event_type': 'session_change' }; if (status.session) { data.fbu = status.session.uid; // Suppress facebook-controlled session. data.fb_session_handoff = true; } FB_JS.ajaxEvent(data.event_type, data); // No need to call window.location.reload(). It will be called from ajaxEvent, if needed. }; // Helper to pass events via AJAX. // A list of javascript functions to be evaluated is returned. FB_JS.ajaxEvent = function(event_type, data) { if (Drupal.settings.fb.ajax_event_url) { // Session data helpful in ajax callbacks. See fb_settings.inc. data.fb_js_session = JSON.stringify(FB.getSession()); if (typeof(Drupal.settings.fb_page_type) != 'undefined') { data.fb_js_page_type = Drupal.settings.fb_page_type; } // Other values to always include. data.apikey = FB._apiKey; if (Drupal.settings.fb.controls) { data.fb_controls = Drupal.settings.fb.controls; } jQuery.post(Drupal.settings.fb.ajax_event_url + '/' + event_type, data, function(js_array, textStatus, XMLHttpRequest) { //debugger; // debug if (js_array.length > 0) { for (var i = 0; i < js_array.length; i++) { eval(js_array[i]); } } else { if (event_type == 'session_change') { // No instructions from ajax, reload entire page. FB_JS.reload(); } } }, 'json'); } }; // Delete a cookie. // ??? Still needed? Facebook's JS SDK may take care of this now. FB_JS.deleteCookie = function( name, path, domain ) { document.cookie = name + "=" + ( ( path ) ? ";path=" + path : "") + ( ( domain ) ? ";domain=" + domain : "" ) + ";expires=Thu, 01-Jan-1970 00:00:01 GMT"; }; // Test the FB settings to see if we are still truly connected to facebook. FB_JS.sessionSanityCheck = function() { if (!Drupal.settings.fb.checkSemaphore) { Drupal.settings.fb.checkSemaphore=true; FB.api('/me', function(response) { if (response.id != Drupal.settings.fb.fbu) { // We are no longer connected. var status = {'changed': true, 'fbu': null, 'check_failed': true}; jQuery.event.trigger('fb_session_change', status); } Drupal.settings.fb.checkSemaphore=null; }); } }; Drupal.behaviors.fb = function(context) { // Respond to our jquery pseudo-events var events = jQuery(document).data('events'); if (!events || !events.fb_session_change) { jQuery(document).bind('fb_session_change', FB_JS.sessionChangeHandler); } // Once upon a time, we initialized facebook's JS SDK here. But now that is done in fb_footer(). if (typeof(FB) != 'undefined') { // Render any XFBML markup that may have been added by AJAX. $(context).each(function() { var elem = $(this).get(0); FB.XFBML.parse(elem); }); } // Markup with class .fb_show should be visible if javascript is enabled. .fb_hide should be hidden. jQuery('.fb_hide', context).hide(); jQuery('.fb_show', context).show(); };