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* This module provides support for "Profile Tabs" that can be added to
* facebook pages (no longer allowed for user profiles).
*
* http://developers.facebook.com/docs/guides/canvas/#tabs
*
*/
// hook_fb
define('FB_TAB_HOOK', 'fb_tab');
//// Hook_fb_tab operations
define('FB_TAB_OP_VIEW', 'fb_tab_view');
define('FB_TAB_OP_FORM', 'fb_tab_form');
define('FB_TAB_PATH_VIEW', 'fb_tab/view');
define('FB_TAB_PATH_FORM', 'fb_tab/config');
define('FB_TAB_PATH_FORM_ARGS', 2);
define('FB_TAB_VAR_PROCESS_FBML', 'fb_tab_process_fbml');
define('FB_TAB_VAR_PROCESS_IFRAME', 'fb_tab_process_iframe');
define('FB_TAB_VAR_PROCESS_ABSOLUTE', 'fb_tab_process_absolute_links');
define('FB_TAB_VAR_PROCESS_TO_CANVAS', 'fb_tab_process_to_canvas');
function fb_tab_menu() {
$items = array();
$items[FB_TAB_PATH_VIEW] = array(
'page callback' => 'fb_tab_view',
'access arguments' => array('access content'),
'type' => MENU_CALLBACK,
);
$items[FB_TAB_PATH_FORM] = array(
'title' => 'Configure Tabs',
'page callback' => 'fb_tab_pages',
'access arguments' => array('access content'),
$items[FB_TAB_PATH_FORM . '/%'] = array(
'page callback' => 'drupal_get_form',
'page arguments' => array('fb_tab_config_form', FB_TAB_PATH_FORM_ARGS),
'access arguments' => array('access content'),
// Admin pages
$items[FB_PATH_ADMIN .'/fb_tab'] = array(
'title' => 'Page Tabs',
'description' => 'Configure Tabs',
'page callback' => 'drupal_get_form',
'page arguments' => array('fb_tab_admin_settings'),
'access arguments' => array(FB_PERM_ADMINISTER),
'file' => 'fb_tab.admin.inc',
'type' => MENU_LOCAL_TASK,
);
return $items;
}
/**
* Implementation of hook_fb
* @param $op
* @param $data -- data payload
* @param $return
*/
function fb_tab_fb($op, $data, &$return) {
$fb = isset($data['fb']) ? $data['fb'] : NULL;
$fb_app = isset($data['fb_app']) ? $data['fb_app'] : NULL;
if ($op == FB_OP_POST_INIT) {
// Include our admin hooks.
if (fb_is_fb_admin_page()) {
require drupal_get_path('module', 'fb_tab') . '/fb_tab.admin.inc';
}
if (fb_is_tab()) {
// Include our javascript.
drupal_add_js(array(
'fb_tab' => array(
'fbu' => fb_facebook_user(),
'uid' => $GLOBALS['user']->uid,
'canvas' => $fb_app->canvas,
),
), 'setting');
drupal_add_js(drupal_get_path('module', 'fb_tab') . '/fb_tab.js');
}
elseif ($op == FB_OP_CURRENT_APP && fb_is_tab()) {
if ($id = fb_settings(FB_SETTINGS_CB)) {
// Using fb_url_rewrite.
$fb_app = fb_get_app(array('id' => $id));
if (!$fb_app) {
// DEPRECATED. For backward compatibility, accept apikey in FB_SETTINGS_CB
$fb_app = fb_get_app(array('apikey' => $id));
}
}
elseif ($id = fb_settings(FB_SETTINGS_ID)) {
// New SDK includes ID when session is present.
$fb_app = fb_get_app(array('id' => $id));
}
// Old, deprecated, FBML tabs.
elseif (isset($_REQUEST['fb_sig_api_key'])) {
$return = fb_get_app(array('apikey' => $_REQUEST['fb_sig_api_key']));
}
if ($fb_app) {
$return = $fb_app;
}
}
elseif ($op == FB_OP_INITIALIZE) {
if (fb_is_tab()) {
$config = _fb_tab_get_config($fb_app);
if (!isset($GLOBALS['custom_theme'])) {
$GLOBALS['custom_theme'] = $config['custom_theme'];
}
if (fb_settings(FB_SETTINGS_TYPE) == FB_SETTINGS_TYPE_PAGE_TAB &&
variable_get(FB_TAB_VAR_PROCESS_IFRAME, TRUE)) {
// Process iframe
$use_ob = TRUE;
}
elseif (fb_settings(FB_SETTINGS_TYPE) == FB_SETTINGS_TYPE_PROFILE &&
variable_get(FB_TAB_VAR_PROCESS_FBML, TRUE)) {
// Process FBML
$use_ob = TRUE;
}
else {
$use_ob = FALSE;
}
// Hack to init the theme before _drupal_maintenance_theme initializes the wrong one.
if (variable_get('site_offline', FALSE)) {
$dummy = theme('dummy');
}
// Store entire page in output buffer. Will post-process on exit.
if ($use_ob) {
ob_start();
$GLOBALS['fb_tab_post_process'] = TRUE;
}
// Override what Drupal renders.
if ($_REQUEST['q'] == FB_TAB_PATH_VIEW) { // Do not override fb_tab/config.
$sr = $fb->getSignedRequest();
if ($sr['page'] && $sr['page']['liked'] && $config['profile_tab_url_liked']) {
$path = $config['profile_tab_url_liked'];
}
else {
$path = $config['profile_tab_url'];
}
if ($path && $path != FB_TAB_PATH_VIEW) {
// Tell Drupal what to really render.
menu_set_active_item(drupal_get_normal_path($path));
}
}
}
}
elseif ($op == FB_OP_EXIT && fb_is_tab()) {
if (isset($GLOBALS['fb_tab_post_process']) && $GLOBALS['fb_tab_post_process']) {
$output = ob_get_contents();
ob_end_clean();
include_once(drupal_get_path('module', 'fb') . '/fb.process.inc');
if (variable_get(FB_TAB_VAR_PROCESS_TO_CANVAS, TRUE)) {
$to_canvas = $fb_app->canvas;
}
else {
$to_canvas = FALSE;
}
if (fb_settings(FB_SETTINGS_TYPE) == FB_SETTINGS_TYPE_PAGE_TAB) {
// Process iframe
$output = fb_process($output, array(
'add_target' => '_top',
'absolute_links' => TRUE,
'to_canvas' => $to_canvas,
));
}
elseif (fb_settings(FB_SETTINGS_TYPE) == FB_SETTINGS_TYPE_PROFILE) {
// Process FBML (deprecated)
$output = fb_process($output, array(
'add_target' => FALSE,
'absolute_links' => TRUE,
'to_canvas' => $to_canvas,
));
}
if (isset($output)) {
print($output);
}
}
}
}
/**
* Implements fb_tab_form_alter.
*/
function fb_tab_form_alter(&$form, &$form_state, $form_id) {
if (isset($form['fb_app_data']) && is_array($form['fb_app_data'])) {
// Add our settings to the fb_app edit form.
//require 'fb_canvas.admin.inc';
fb_tab_admin_form_alter($form, $form_state, $form_id);
}
/**
* Helper returns configuration for this module, on a per-app basis.
*/
function _fb_tab_get_config($fb_app) {
$fb_app_data = fb_get_app_data($fb_app);
$config = isset($fb_app_data['fb_tab']) ? $fb_app_data['fb_tab'] : array();
// Merge in defaults
$config += array(
'custom_theme' => NULL,
'tab_default_name' => isset($fb_app->title) ? $fb_app->title : NULL,
'profile_tab_url' => NULL,
'profile_tab_url_liked' => NULL,
'edit_url' => FB_TAB_PATH_FORM,
/**
* Another module provides the contents of the tab depending
* on the context that we give it (who is calling it, etc.)
*/
function fb_tab_view() {
$fb_app = $GLOBALS['_fb_app'];
$fb = $GLOBALS['_fb'];
$profile_id = fb_settings(FB_SETTINGS_CB_PAGE);
$config = fb_tab_fetch_config($fb_app, $profile_id);
$sr = $fb->getSignedRequest();
$data = array(
'fb_app' => $fb_app,
'fb' => $fb,
'profile_id' => $profile_id,
'config' => isset($config['data']) ? $config['data'] : NULL,
'page' => $sr['page'],
);
$content = fb_invoke(FB_TAB_OP_VIEW, $data, array(), FB_TAB_HOOK);
return drupal_render($content);
}
/**
* Build the tab config form. Invokes hook_fb_tab() to get the custom settings.
*/
function fb_tab_config_form($form_state, $profile_id) {
$fb_app = $GLOBALS['_fb_app'];
$fb = $GLOBALS['_fb'];
$config = fb_tab_fetch_config($fb_app, $profile_id);
$sr = $fb->getSignedRequest();
$data = array(
'fb_app' => $fb_app,
'fb' => $fb,
'profile_id' => $profile_id,
'config' => isset($config['data']) ? $config['data'] : NULL,
'page' => $sr['page'],
);
//$fbu = fb_facebook_user($fb);
$fbu = fb_require_authorization($fb);
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$page_info = $fb->api($profile_id, array(
'access_token' => fb_get_token($fb),
));
$admin_info = fb_fql_query($fb, "SELECT uid, type FROM page_admin WHERE uid=$fbu AND page_id=$profile_id"); // FQL not SQL, no {curly_brackets}
//dpm($admin_info, __FUNCTION__);
// @TODO: if not page admin, prompt user to login or deny access.
$form = array(
'info' => array(
'#type' => 'markup',
'#value' => t('Tab settings for <a href="!href">%page</a>', array(
'!href' => $page_info['link'],
'%page' => $page_info['name'],
)),
'#prefix' => '<h3>',
'#suffix' => '</h3>',
'#weight' => -99,
),
'label' => array(
'#type' => 'value',
'#value' => $fb_app->label,
),
'profile_id' => array(
'#type' => 'value',
'#value' => $profile_id,
),
'data' => array(
// Modules will add their fields here.
'#tree' => TRUE,
),
'submit' => array(
'#type' => 'submit',
'#value' => t('Submit'),
'#weight' => 90,
),
);
if (isset($config['fb_tab_id'])) {
$form['fb_tab_id'] = array(
'#type' => 'value',
'#value' => $config['fb_tab_id'],
);
}
$form['data'] = fb_invoke(FB_TAB_OP_FORM, $data, $form['data'], FB_TAB_HOOK);
//print('<pre>' . print_r($data, 1) . '</pre>'); flush();
//print(print_r($content, 1)); flush();
return $form;
}
catch (Exception $e) {
fb_log_exception($e, t('Failed to get details for facebook page %profile_id', array(
'%profile_id' => $profile_id,
)));
return array(
'error' => array(
'#value' => t('Unable to set properties.'),
),
);
}
}
/**
* Submit handler for tab config form.
*/
function fb_tab_config_form_submit($form, &$form_state) {
if ($profile_id = $form_state['values']['profile_id']) {
fb_tab_write_config($form_state['values']);
$data = fb_fql_query($GLOBALS['_fb'], "SELECT page_id, name, pic_small, page_url, type FROM page WHERE page_id=$profile_id"); // FQL, no {curly_brackets}
drupal_set_message(t('The tab settings for <a href="!url">%page</a> have been updated.', array(
'!url' => $data[0]['page_url'],
'%page' => $data[0]['name'],
)));
}
}
/*
* Store configuration data for a tab by application.
*/
function fb_tab_write_config(&$row) {
if (!isset($row['created']))
$row['created'] = time();
$row['data'] = serialize($row['data']);
return drupal_write_record('fb_tab', $row,
isset($row['fb_tab_id']) ? array('fb_tab_id') : NULL);
}
/*
* Return configuration of a tab by application (access via 'label') and page ID.
* Page ID exists because an app can present different views on different pages.
*/
function fb_tab_fetch_config($fb_app, $profile_id) {
$result = db_query("SELECT * FROM {fb_tab} WHERE label = '%s' AND profile_id = %d" , $fb_app->label, $profile_id);
$row = db_fetch_array($result);
if ($row) {
$row['data'] = unserialize($row['data']);
return $row;
}
else {
return array();
}
}
* This page callback will show the user a list of pages they have authority
* to configure.
*/
function fb_tab_pages() {
if ($fbu = fb_facebook_user()) {
// @TODO: broken on facebook's end??? this query used to work.
$result = fb_fql_query($GLOBALS['_fb'], "SELECT page_id, name, pic_small, page_url, type FROM page WHERE has_added_app=1 AND page_id IN (SELECT page_id FROM page_admin WHERE uid=$fbu)"); // FQL, no {curly_brackets}
if (count($result)) {
$output['pages'] = array(
'#prefix' => '<ul>',
'#suffix' => '</ul>',
);
foreach ($result as $data) {
$output['pages'][$data['page_id']] = array(
'#value' => l($data['name'], fb_tab_config_url($data['page_id'], array('fb_canvas' => fb_is_canvas()))),
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'#prefix' => '<li>',
'#suffix' => '</li>',
);
}
$output['intro'] = array(
'#value' => t('Select one of your pages to configure:'),
'#prefix' => '<p>',
'#suffix' => '</p>',
);
}
else {
$output['intro'] = array(
'#value' => t('Found no pages to configure.'),
'#prefix' => '<p>',
'#suffix' => '</p>',
);
}
return drupal_render($output);
}
else {
fb_access_denied();
}
}
/**
* Provides the URL of the settings page for a given facebook page.
*/
function fb_tab_config_url($profile_id = NULL, $options = array()) {
if (!$profile_id) {
$profile_id = fb_settings(FB_SETTINGS_CB_PAGE);
}
return url(FB_TAB_PATH_FORM . '/' . $profile_id, $options);