<?php
// $Id$
/**
 * @file
 * Customization and integration with the privatemsg module.
 */

/**
 * Load includes.
 */
require_once dirname(__FILE__) .'/custom_privatemsg.groups.inc';

/**
 * Implements hook_perm().
 */
function custom_privatemsg_perm() {
  return array(
    'write privatemsg to group admin', 'view group admin recipients',
    'write privatemsg to group members', 'view group members recipients',
  );
}

/**
 * Implement hook_theme().
 */
function custom_privatemsg_theme() {
  $items = array();
  $items['custom_privatemsg_group_admin_format'] = array(
    'arguments' => array('group' => NULL, 'options' => array()),
  );
  $items['custom_privatemsg_group_members_format'] = array(
    'arguments' => array('group' => NULL, 'options' => array()),
  );
  return $items;
}


/**
 * Implement hook_privatemsg_recipient_types_info().
 */
function custom_privatemsg_privatemsg_recipient_type_info() {
  return array(
    'group-admin' => array(
      'name' => t('Group Admin'),
      'description' => t('Enter the nid of a group to write a message to all admins of that group. Example: 27 [group-admin].'),
      'load' => 'custom_privatemsg_group_admin_load_multiple',
      'format' => 'custom_privatemsg_group_admin_format',
      'autocomplete' => 'custom_privatemsg_group_admin_autocomplete',
      'generate recipients' => 'custom_privatemsg_group_admin_load_recipients',
      'count' => 'custom_privatemsg_group_admin_count_recipients',
      'write access' => 'write privatemsg to group admin',
      'view access' => 'view group admin recipients',
    ),
    'group-members' => array(
      'name' => t('Group Members'),
      'description' => t('Enter the nid of a group to write a message to all members of that group. Example: 27 [group-admin].'),
      'load' => 'custom_privatemsg_group_members_load_multiple',
      'format' => 'custom_privatemsg_group_members_format',
      'autocomplete' => 'custom_privatemsg_group_members_autocomplete',
      'generate recipients' => 'custom_privatemsg_group_members_load_recipients',
      'count' => 'custom_privatemsg_group_members_count_recipients',
      'write access' => 'write privatemsg to group members',
      'view access' => 'view group members recipients',
    ),
  );
}

/**
 * Implement hook_privatemsg_message_validate().
 */
function custom_privatemsg_privatemsg_message_validate($message, $form = FALSE) {
  global $_privatemsg_invalid_recipients;
  $status = array();

  // If there are group members recipients, make sure author
  // is an admin of those groups.
  if (module_exists('custom_groups')) {
    foreach ($message['recipients'] as $recipient) {
      if ($recipient->type == 'group-members') {
        if (!custom_groups_is_admin($message->author, $recipient)) {
          $_privatemsg_invalid_recipients[] = $recipient->recipient;
          $errors['errors'][] = t('Only the "!name" group admin may send messages to it\'s members.', array('!name' => check_plain($recipient->title))) ;
        }
      }
    }
  }

  return $status;
}