<?php
  /**
   * @file
   * 
   * Actions defined here interact with Facebook's API.  This makes it
   * possible to notify facebook of various activities as they happen.
   */


function fb_actions_action_info() {
  return array('fb_actions_minifeed' =>
               array('type' => 'fb_action',
                     'description' => t('Post to Facebook mini-feed'),
                     'configurable' => TRUE,
                     'hooks' => array('nodeapi' => array('delete', 'insert', 'update', 'view'),
                                      'comment' => array('delete', 'insert', 'update', 'view'),
                                      'user' => array('insert', 'update', 'delete', 'login', 'logout'),                                      
                     ),
               ),
               'fb_actions_profile_fbml' =>
               array('type' => 'fb_action',
                     'description' => t('Write to Facebook profile'),
                     'configurable' => TRUE,
                     'hooks' => array('nodeapi' => array('delete', 'insert', 'update', 'view'),
                                      'comment' => array('delete', 'insert', 'update', 'view'),
                                      'user' => array('insert', 'update', 'delete', 'login', 'logout'),
                                      'cron' => array('run'),
                     ),
               ),               
               'fb_actions_ref_fbml' =>
               array('type' => 'fb_action',
                     'description' => t('Write to Facebook reference FBML'),
                     'configurable' => TRUE,
                     'hooks' => array('nodeapi' => array('delete', 'insert', 'update', 'view'),
                                      'comment' => array('delete', 'insert', 'update', 'view'),
                                      'user' => array('insert', 'update', 'delete', 'login', 'logout'),
                                      'cron' => array('run'),
                     ),
               ),
               'fb_actions_cron_per_user' =>
               array('type' => 'fb_app',
                     'description' => t('Perform an Action once for each user of a Facebook App'),
                     'configurable' => TRUE,
                     'hooks' => array('cron' => array('run')),
               ),
  );
  
  }


function fb_actions_minifeed($values = array(), &$object) {
  // drupal_set_message("fb_actions_minifeed" . dpr($values, 1) . dpr($object, 1)); // debug
  if ($values['hook'] == 'nodeapi') {
    $node = $values['node'];
  }
  else if ($values['hook'] == 'comment') {
    $comment = $values['comment'];
    $node = node_load($comment->nid);
  }
  else if ($values['hook'] == 'user') {
    $account = $values['user'];
  }
  
  // Log into facebook as the current user.
  if ($fb_app = $GLOBALS['fb_app'])
    if ($values['fb_app_nid'] == FB_APP_CURRENT || 
        $fb_app->nid == $values['fb_app_nid'])
      // We're in a canvas page for the desired app.  We're already logged in.
      $fb = $GLOBALS['fb'];
  if (!$fb && $values['fb_app_nid'] != FB_APP_CURRENT) {
    global $user;
    // Need to log into this app.
    $fb_app = fb_get_app(array('nid' => $values['fb_app_nid']));
    $fbu = fb_get_fbu($user->uid, $fb_app);
    if ($fbu) {
      $fb = fb_api_init($fb_app, $fbu);
    }
  }

  // Even if we have an $fb now, it may not have permission to do all things
  // we ask of it.
  if ($fb) {
    // Replace both node and fb_app related tokens
    $title = token_replace($values['title'], 'node', $node);
    $title = token_replace($title, 'comment', $comment);
    $title = token_replace($title, 'user', $account);
    $title = token_replace($title, 'fb_app', $fb_app);
    $body = token_replace($values['body'], 'node', $node);
    $body = token_replace($body, 'comment', $comment);
    $body = token_replace($body, 'user', $account);
    $body = token_replace($body, 'fb_app', $fb_app);
    $fb->api_client->feed_publishActionOfUser($title, $body);
    fb_report_errors($fb);
  }
}

function fb_actions_minifeed_form($values) {
  $options = fb_get_app_options(TRUE);
  $form['description'] = array('#value' => t('Note that this action will only succeed when executed from a Facebook canvas page when the user is logged in, or on non-canvas pages when the logged in user has an infinite session key.  These are privacy restrictions enforced by the Facebook API.'));
  $form['fb_app_nid'] = 
    array('#type' => 'select',
          '#title' => t('Application'),
          '#default_value' => $values['fb_app_nid'],
          '#options' => $options,
          '#description' => t('Log into Facebook as which action?  If %current, action will only be performed only on canvas pages.',
                              array('%current' => $options[FB_APP_CURRENT])),
    );
  $form['title'] = array('#type' => 'textfield',
                         '#title' => t('Title'),
                         '#default_value' => $values['title'],
                         '#description' => t('Title line of mini-feed item.  (Most Facebook mini-feed items have only a title, and no message body).'),
                         '#required' => TRUE,
  );
  $form['body'] = array('#type' => 'textarea',
                        '#title' => t('Body'),
                        '#default_value' => $values['body'],
                        '#description' => t('Text to publish on mini-feed.  In many cases, only the title is required and this may be left blank.<br />The following tokens will be replaced: !token_help',
                                            array('!token_help' => theme('token_help', 'node') . theme('token_help', 'comment') . theme('token_help', 'fb_app'))),
  );
  return $form;
}
function fb_actions_minifeed_validate($form_id, $values) {
}
function fb_actions_minifeed_submit($form_id, $values) {
  return array('fb_app_nid' => $values['fb_app_nid'],
               'body' => $values['body'],
               'title' => $values['title'],
  );
}


/**
 * Implementation of an Action.  See Actions module.
 * 
 * This action updates a user's profile FBML.
 */

function fb_actions_profile_fbml_form($values) {
  $options = fb_get_app_options(TRUE);
  $form['description'] = array('#value' => t('This action will update the current user\'s Facebook profile.  Suitable for canvas pages and cron jobs (if infinite session is configured).'));
  $form['fb_app_nid'] = 
    array('#type' => 'select',
          '#title' => t('Application'),
          '#default_value' => $values['fb_app_nid'],
          '#options' => $options,
          '#description' => t('Log into Facebook as which application?  %current is OK when invoked from canvas pages or cron jobs.',
                              array('%current' => $options[FB_APP_CURRENT])),
    );
  
  $form['body'] = array('#type' => 'textarea',
                        '#title' => t('Profile FBML'),
                        '#default_value' => $values['body'],
                        '#description' => t('FBML to write to user\'s profile.<br />The following token will be replaced: !token_help',
                                            array('!token_help' => theme('token_help', 'fb_app'))),
  );
  $form['body_filter'] = filter_form($values['body_filter'],
                                     NULL,
                                     array('body_filter'));
  return $form;
}
function fb_actions_profile_fbml_validate($form_id, $values) {
  // TODO
}
function fb_actions_profile_fbml_submit($form_id, $values) {
  return array('fb_app_nid' => $values['fb_app_nid'],
               'body' => $values['body'],
               'body_filter' => $values['body_filter'],
  );
}
function fb_actions_profile_fbml($values, &$object) {
  //drupal_set_message("fb_actions_profile_fbml" . dpr($values, 1) . dpr($object, 1));
  if ($values['hook'] == 'nodeapi') {
    $node = $values['node'];
  }
  else if ($values['hook'] == 'comment') {
    $comment = $values['comment'];
    $node = node_load($comment->nid);
  }
  else if ($values['hook'] == 'user') {
    $account = $values['user']; // untested
  }

  // Log into facebook as the current user.
  if ($fb_app = $GLOBALS['fb_app'])
    if ($values['fb_app_nid'] == FB_APP_CURRENT || 
        $fb_app->nid == $values['fb_app_nid'])
      // We're in a canvas page for the desired app.  We're already logged in.
      $fb = $GLOBALS['fb'];
  if (!$fb && $values['fb_app_nid'] != FB_APP_CURRENT) {
    // Need to log into this app.
    $fb_app = fb_get_app(array('nid' => $values['fb_app_nid']));
    $fb = fb_api_init($fb_app, FB_FBU_INFINITE_SESSION);
  }
    
  if ($fb && $fb->get_loggedin_user()) {
    fb_init_path($fb_app);
    global $user;
    $fbu = fb_get_fbu($user->uid, $fb_app);
    // Replace fb_app related tokens
    $body = token_replace($values['body'], 'fb_app', $fb_app);
    $body = check_markup($body, $values['body_filter'], FALSE);
    
    // Links in profile FBML must be fully-qualified.  Here we attempt to
    // replace relative links with fully qualified ones.
    global $base_url, $base_path;
    $patterns[] = '/"'.str_replace('/','\/', $base_path).'([^"]*)"/';
    $replacements[] = '"'.$base_url.'/$1"';
    $body = preg_replace($patterns, $replacements, $body);
    
    // print("Setting facebook profile markup for $user->name to " . dpr($body, 1));
    $fb->api_client->profile_setFBML($body, $fbu);
    fb_report_errors($fb);
    fb_init_path($fb_app, TRUE);
  }
}

/**
 * Implementation of an Action.
 * 
 * This action updates reference FBML.
 * http://developer.facebook.com/documentation.php?v=1.0&method=fbml.setRefHandle
 */
function fb_actions_ref_fbml_form($values) {
  $form['description'] = array('#value' => t('This action will update reference FBML.  See Facebook\'s documentation of the &lt;fb:ref&gt; tag.  Suitable for canvas pages and cron jobs (if infinite session is configured).'));
  $options = fb_get_app_options(TRUE);
  $form['fb_app_nid'] = 
    array('#type' => 'select',
          '#title' => t('Application'),
          '#default_value' => $values['fb_app_nid'],
          '#options' => $options,
          '#description' => t('Log into Facebook as which application?  %current is OK when invoked from canvas pages or cron jobs.',
                              array('%current' => $options[FB_APP_CURRENT])),
    );
  $form['handle'] = array('#type' => 'textfield',
                          '#title' => t('Handle'),
                          '#default_value' => $values['handle'],
  );
  $form['body'] = array('#type' => 'textarea',
                        '#title' => t('Profile FBML'),
                        '#default_value' => $values['body'],
                        '#description' => t('FBML to write to user\'s profile.<br />The following token will be replaced: !token_help',
                                            array('!token_help' => theme('token_help', 'fb_app'))),
  );
  $form['body_filter'] = filter_form($values['body_filter'],
                                     NULL,
                                     array('body_filter'));
  return $form;
}
function fb_actions_ref_fbml_validate($form_id, $values) {
  // TODO
}
function fb_actions_ref_fbml_submit($form_id, $values) {
  return array('handle' => $values['handle'],
               'body' => $values['body'],
               'body_filter' => $values['body_filter'],
  );
}
function fb_actions_ref_fbml($values, &$object) {
  if ($values['hook'] == 'nodeapi') {
    $node = &$object;
  }
  else if ($values['hook'] == 'comment') {
    $node = node_load($object['nid']);
    $comment = &$object;
  }
  else if ($values['hook'] == 'user') {
    $account = &$object;
  }
  
  // Log into facebook as the current user.
  if ($fb_app = $GLOBALS['fb_app'])
    if ($values['fb_app_nid'] == FB_APP_CURRENT || 
        $fb_app->nid == $values['fb_app_nid'])
      // We're in a canvas page for the desired app.  We're already logged in.
      $fb = $GLOBALS['fb'];
  if (!$fb && $values['fb_app_nid'] != FB_APP_CURRENT) {
    // Need to log into this app.
    $fb_app = fb_get_app(array('nid' => $values['fb_app_nid']));
    $fb = fb_api_init($fb_app, FB_FBU_INFINITE_SESSION);
  }
  
  // This will be set on canvas pages and Facebook App cron actions.
  if ($fb) {
    fb_init_path($fb_app);
    // Replace fb_app related tokens
    $body = token_replace($values['body'], 'fb_app', $fb_app);
    $body = check_markup($body, $values['body_filter'], FALSE);
    $fb->api_client->fbml_setRefHandle($values['handle'], $body);
    fb_report_errors($fb);
    fb_init_path($fb_app, TRUE); // Restore old paths
  }
}


function fb_actions_cron_per_user_form($values) {
  $form['description'] = array('#value' => t('This action will iterate through user\'s of a Facebook Application, attempt to log into the Facebook API as that user (or failing that, the infinite session user), and execute additional actions.  Use this to perform per-user actions during a Facebook cron job.'));
  
  $options = fb_get_app_options(FALSE);
  $form['fb_app_nids'] = 
    array('#type' => 'select',
          '#title' => t('Application'),
          '#multiple' => TRUE,
          '#required' => TRUE,
          '#default_value' => $values['fb_app_nid'],
          '#options' => $options,
          '#description' => t('Perform these actions for each user of which applications?'),
    );
  
  foreach (actions_get_all_actions() as $aid => $action) {
    $options[$action['type']][$aid] = $action['description'];
  }
  $form['actions'] = array('#type' => 'select',
                           '#title' => t('Actions'),
                           '#default_value' => $values['actions'],
                           '#multiple' => TRUE,
                           '#required' => TRUE,
                           '#options' => $options,
                           '#description' => t('Select one or more actions to perform while logged in as a Facebook Application user.'),
  );
  $form['throttle'] = array('#type' => 'textfield',
                            '#title' => t('Throttle'),
                            '#default_value' => $values['throttle'],
                            '#required' => TRUE,
                            '#description' => t('Number of users to iterate through each time this action is invoked.  Recommended: start with a small number and increase when you are sure things are working.'),
  );
  return $form;
}

function fb_actions_cron_per_user_submit($form_id, $values) {
  return array('fb_app_nids' => $values['fb_app_nids'],
               'actions' => $values['actions'],
               'throttle' => $values['throttle'],
  );
}
function fb_actions_cron_per_user($values, $obj) {
  foreach ($values['fb_app_nids'] as $nid) {
    $fb_app = fb_get_app(array('nid' => $nid));
    // Set paths as if on a canvas page.
    fb_init_path($fb_app);

    // perform per-user actions
    // Save current settings
    $before_fb = $GLOBALS['fb'];
    $before_fb_app = $GLOBALS['fb_app'];
    $before_user = $GLOBALS['user'];
    
    // Find some users of the app, for whom cron has not run recently.
    $result = db_query("SELECT * FROM {fb_user_app} WHERE apikey='%s' AND fbu > 0 AND added > 0 ORDER BY time_cron ASC LIMIT %d",
                       $fb_app->apikey,
                       $values['throttle']);
    while ($data = db_fetch_object($result)) {
      // Log into facebook as the user from the database
      $account = fb_user_get_local_user($data->fbu, $fb_app);
      if (!$account || !$account->uid) {
        watchdog('fb cron', t('Facebook user %fbu does not correspond to a local account.  Purging bad data from Facebook User table.',
                              array('%fbu' => $data->fbu)));
        //db_query("DELETE FROM {fb_user_app} WHERE apikey='%s' AND fbu = %d",
        //         $fb_app->apikey,
        //         $data->fbu);
      }
      else {
        // If here, local user has been found.
        
        $fb = fb_api_init($fb_app, $data->fbu);
        if (!$fb || !$fb->api_client->users_getLoggedInUser())
          // Failed to log in as the current user, fallback to infinite session.
          $fb = fb_api_init($fb_app, FB_FBU_INFINITE_SESSION);
        if (!$fb || !$fb->api_client->users_getLoggedInUser()) {
          watchdog('fb cron', t('Failed to log into %app during cron.  Try testing infinite session key.',
                                array('%app' => $fb_app->title)));
        }
        else {
          // if here, we're logged into facebook.
          
          // Set things up as if this were a canvas page.
          $GLOBALS['user'] = $account;
          $GLOBALS['fb'] = $fb;
          $GLOBALS['fb_app'] = $fb_app;
          
          // Invoke any actions that we've been configured to invoke.
          actions_do($values['actions'], $fb_app);
          
        } // end if able to log into facebook
      } // end if local user found.
      
      // Record how recently cron was run for this user.  We do this even if
      // we failed to log in, because we don't want persistent problems to
      // clog the cron queue.  We'll get to this user again, eventually.
      db_query("UPDATE {fb_user_app} SET time_cron=%d WHERE apikey='%s' AND fbu=%d",
               time(), $fb_app->apikey, $data->fbu);
      
    }
    
    // Restore global variables
    $GLOBALS['user'] = $before_user;
    $GLOBALS['fb'] = $before_fb;
    $GLOBALS['fb_app'] = $before_fb_app;
    
    fb_init_path($fb_app, TRUE); // restore original path settings.
  }
}


  ///////////////////////////////////////////////////////////////////
  // Below this line is obsolete code.  Actions have changed considerably, and the following is deprecated.  Recommended that you get the very latest actions module and start using it.

  /**
   * Implementation of an Action.  See Actions module.
   * 
   * This action publishes to a user's mini-feed.
   */
function action_fb_write_minifeed($op, $edit = array(), $node) {
  if ($op == 'metadata') {
    return array('description' => t('Post to Facebook mini-feed'),
                 'type' => t('Facebook'),
                 'batchable' => FALSE,
                 'configurable' => TRUE,
    );
  }
  else if ($op == 'form') {
    $options = fb_get_app_options(TRUE);
    $form['description'] = array('#value' => t('Note that this action will only succeed when executed from a Facebook canvas page when the user is logged in, or on non-canvas pages when the logged in user has an infinite session key.  These are privacy restrictions enforced by the Facebook API.'));
    $form['fb_app_nid'] = 
      array('#type' => 'select',
            '#title' => t('Application'),
            '#default_value' => $edit['fb_app_nid'],
            '#options' => $options,
            '#description' => t('Log into Facebook as which action?  If %current, action will only be performed only on canvas pages.',
                                array('%current' => $options[FB_APP_CURRENT])),
      );
    $form['title'] = array('#type' => 'textfield',
                           '#title' => t('Title'),
                           '#default_value' => $edit['title'],
                           '#description' => t('Title line of mini-feed item.  (Most Facebook mini-feed items have only a title, and no message body).'),
                           '#required' => TRUE,
    );
    $form['body'] = array('#type' => 'textarea',
                          '#title' => t('Body'),
                          '#default_value' => $edit['body'],
                          '#description' => t('Text to publish on mini-feed.  In many cases, only the title is required and this may be left blank.<br />The following token will be replaced: !token_help',
                                              array('!token_help' => theme('token_help', 'node') . theme('token_help', 'fb_app'))),
    );
    return $form;
  }
  else if ($op == 'submit') {
    return array('fb_app_nid' => $edit['fb_app_nid'],
                 'body' => $edit['body'],
                 'title' => $edit['title'],
    );
  }
  else if ($op == 'do') {
    // Log into facebook as the current user.
    if ($fb_app = $GLOBALS['fb_app'])
      if ($edit['fb_app_nid'] == FB_APP_CURRENT || $fb_app->nid == $edit['fb_app_nid'])
        // We're in a canvas page for the desired app.  We're already logged in.
        $fb = $GLOBALS['fb'];
    if (!$fb && $edit['fb_app_nid'] != FB_APP_CURRENT) {
      global $user;
      // Need to log into this app.
      $fb_app = fb_get_app(array('nid' => $edit['fb_app_nid']));
      $fbu = fb_get_fbu($user->uid, $fb_app);
      if ($fbu) {
        $fb = fb_api_init($fb_app, $fbu);
      }
    }
    // Even if we have an $fb now, it may not have permission to do all things
    // we ask of it.
    if ($fb) {
      // Replace both node and fb_app related tokens
      $title = token_replace($edit['title'], 'node', $node);
      $title = token_replace($title, 'fb_app', $fb_app);
      $body = token_replace($edit['body'], 'node', $node);
      $body = token_replace($body, 'fb_app', $fb_app);
      $fb->api_client->feed_publishActionOfUser($title, $body);
      fb_report_errors($fb);
    }
  }
}


/**
 * Implementation of an Action.  See Actions module.
 * 
 * This action updates a user's profile FBML.
 */
function action_fb_set_profile_fbml($op, $edit = array(), $obj) {
  if ($op == 'metadata') {
    return array('description' => t('Facebook set profile FBML'),
                 'type' => t('Facebook'),
                 'batchable' => FALSE,
                 'configurable' => TRUE,
    );
  }
  else if ($op == 'form') {
    $options = fb_get_app_options(TRUE);
    $form['description'] = array('#value' => t('This action will update the current user\'s Facebook profile.  Suitable for canvas pages and cron jobs (if infinite session is configured).'));
    $form['fb_app_nid'] = 
      array('#type' => 'select',
            '#title' => t('Application'),
            '#default_value' => $edit['fb_app_nid'],
            '#options' => $options,
            '#description' => t('Log into Facebook as which application?  %current is OK when invoked from canvas pages or cron jobs.',
                                array('%current' => $options[FB_APP_CURRENT])),
      );

    $form['body'] = array('#type' => 'textarea',
                          '#title' => t('Profile FBML'),
                          '#default_value' => $edit['body'],
                          '#description' => t('FBML to write to user\'s profile.<br />The following token will be replaced: !token_help',
                                              array('!token_help' => theme('token_help', 'fb_app'))),
    );
    return $form;
  }
  else if ($op == 'submit') {
    return array('fb_app_nid' => $edit['fb_app_nid'],
                 'body' => $edit['body'],
    );
  }
  else if ($op == 'do') {
    // Log into facebook as the current user.
    if ($fb_app = $GLOBALS['fb_app'])
      if ($edit['fb_app_nid'] == FB_APP_CURRENT || $fb_app->nid == $edit['fb_app_nid'])
        // We're in a canvas page for the desired app.  We're already logged in.
        $fb = $GLOBALS['fb'];
    if (!$fb && $edit['fb_app_nid'] != FB_APP_CURRENT) {
      // Need to log into this app.
      $fb_app = fb_get_app(array('nid' => $edit['fb_app_nid']));
      $fb = fb_api_init($fb_app, FB_FBU_INFINITE_SESSION);
    }
    
    if ($fb) {
      global $user;
      $fbu = fb_get_fbu($user->uid, $fb_app);
      // Replace fb_app related tokens
      $body = token_replace($edit['body'], 'fb_app', $fb_app);
      // TODO: enable filters for body.

      // print("Setting facebook profile markup for $user->name to " . dpr($body, 1));

      $fb->api_client->profile_setFBML($body, $fbu);
      fb_report_errors($fb);
    }
  }
}
/**
 * Implementation of an Action.
 * 
 * This action updates reference FBML.
 * http://developer.facebook.com/documentation.php?v=1.0&method=fbml.setRefHandle
 */
function action_fb_set_ref_fbml($op, $edit = array(), $fb_app) {
  if ($op == 'metadata') {
    return array('description' => t('Facebook set reference FBML'),
                 'type' => t('Facebook App'),
                 'batchable' => FALSE,
                 'configurable' => TRUE,
    );
  }
  else if ($op == 'form') {
    $options = fb_get_app_options(TRUE);
    $form['description'] = array('#value' => t('This action will update reference FBML.  See Facebook\'s documentation of the &lt;fb:ref&gt; tag.  Suitable for canvas pages and cron jobs (if infinite session is configured).'));
    $form['handle'] = array('#type' => 'textfield',
                            '#title' => t('Handle'),
                            '#default_value' => $edit['handle'],
    );
    $form['body'] = array('#type' => 'textarea',
                          '#title' => t('Profile FBML'),
                          '#default_value' => $edit['body'],
                          '#description' => t('FBML to write to user\'s profile.<br />The following token will be replaced: !token_help',
                                              array('!token_help' => theme('token_help', 'fb_app'))),
    );
    $form['body_filter'] = filter_form($edit['body_filter'],
                                       NULL,
                                       array('body_filter'));
    return $form;
  }
  else if ($op == 'submit') {
    return array('handle' => $edit['handle'],
                 'body' => $edit['body'],
                 'body_filter' => $edit['body_filter'],
    );
  }
  else if ($op == 'do') {
    if ($GLOBALS['fb_app']->apikey == $fb_app->apikey)
      // Use global FB api, if set up.
      $fb = $GLOBALS['fb'];
    else
      $fb = fb_api_init($fb_app, FB_FBU_INFINITE_SESSION);
    
    // This will be set on canvas pages and Facebook App cron actions.
    if ($fb) {
      // Replace fb_app related tokens
      $body = token_replace($edit['body'], 'fb_app', $fb_app);
      $body = check_markup($body, $edit['body_filter'], FALSE);
      $fb->api_client->fbml_setRefHandle($edit['handle'], $body);
      // TODO: enable filters for body.
      $fb->api_client->profile_setFBML($body, $fbu);
      fb_report_errors($fb);
    }
  }
}


?>