<?php
// $Id: user_relationships_hooks.inc,v 1.11.4.11 2009-05-08 09:49:12 alexk Exp $

/**
 * User Relationships hook implementations
 */

/**
 * Help
 */
function user_relationships_help($section) {
  switch ($section) {
    case 'admin/help#user_relationships':
      $output = '<p>'. t('This module allows you to create relationship types that users can use to connect to each other.') .'</p>';
      return $output;

    case 'admin/user/relationships':
      $output = '<p>'. t('This page lets you setup user relationship types.') .'</p>';
      return $output;
  }
}

/**
 * Perm
 */
function user_relationships_perm() {
  return array(
    'administer user relationships',
    'maintain relationships',
    'view user relationships',
    'can have relationship',
  );
}

/**
 * Menu
*/
function user_relationships_menu($may_cache) {
  $items = array();
  if ($may_cache) {
    $items[] = array(
      'path'                => 'admin/user/relationships',
      'title'               => t('Relationships'),
      'description'         => t('Create relationship types'),
      'access'              => user_access('administer user relationships'),
      'callback'            => 'user_relationships_types_list_page',
    );
      $items[] = array(
        'path'      => 'admin/user/relationships/list',
        'title'     => t('List'),
        'callback'  => 'user_relationships_types_list_page',
        'access'    => user_access('administer user relationships'),
        'type'      => MENU_DEFAULT_LOCAL_TASK,
      );
      $items[] = array(
        'path'                => 'admin/user/relationships/add',
        'title'               => t('Add type'),
        'callback'            => 'drupal_get_form',
        'callback arguments'  => array('user_relationships_type_edit'),
        'access'              => user_access('administer user relationships'),
        'type'                => MENU_LOCAL_TASK,
        'weight'              => 1,
      );
      $items[] = array(
        'path'                => 'admin/user/relationships/edit',
        'title'               => t('Edit type'),
        'callback'            => 'drupal_get_form',
        'callback arguments'  => array('user_relationships_type_edit'),
        'access'              => user_access('administer user relationships'),
        'type'                => MENU_CALLBACK,
      );
      $items[] = array(
        'path'                => 'admin/user/relationships/delete',
        'title'               => t('Delete type'),
        'callback'            => 'drupal_get_form',
        'callback arguments'  => array('user_relationships_type_delete'),
        'access'              => user_access('administer user relationships'),
        'type'                => MENU_CALLBACK,
      );
    $items[] = array(
      'path'                => 'admin/user/relationships/settings',
      'title'               => t('Settings'),
      'callback'            => 'drupal_get_form',
      'callback arguments'  => array('user_relationships_settings'),
      'access'              => user_access('administer user relationships'),
      'type'                => MENU_LOCAL_TASK,
      'weight'              => 2,
    );

    $items[] = array(
      'path'                => 'relationship_types/autocomplete',
      'title'               => t('User Relationships Autocomplete'),
      'callback'            => '_user_relationships_autocomplete_types',
      'access'              => user_access('administer user relationships'),
      'type'                => MENU_CALLBACK
    );
  }
  else {
    global $user;

    $id = is_numeric(arg(1)) ? arg(1) : $user->uid;
    $edit_access = ($id == $user->uid && user_access('maintain relationships')) || user_access('administer users');
    $view_access = (($id == $user->uid && user_access('maintain relationships')) || user_access('view user relationships'));

    $items[] = array(
      'path'                => 'relationships',
      'title'               => t('My relationships'),
      'access'              => ($id && user_access('maintain relationships')),
      'type'                => MENU_NORMAL_ITEM,
      'callback'            => 'theme',
      'callback arguments'  => array('user_relationships_page', $user->uid),
    );
      $items[] = array(
        'path'                => "relationships/list",
        'title'               => t('All'),
        'access'              => $view_access && $user->uid,
        'type'                => MENU_NORMAL_ITEM|MENU_DEFAULT_LOCAL_TASK,
        'weight'              => -10,
      );
      if (true || ($approval_required && $edit_access)) {
        $items[] = array(
          'path'                => "relationships/requests",
          'title'               => t('Pending'),
          'access'              => $edit_access,
          'callback'            => 'theme',
          'type'                => MENU_NORMAL_ITEM|MENU_LOCAL_TASK,
          'weight'              => -9,
          'callback arguments'  => array('user_relationships_pending_requests_page', $user->uid)
        );
      }
      if (arg(0) == 'relationships' && is_numeric(arg(1))) {
        $relationships = user_relationships_types_load();
        foreach ($relationships as $rtid => $relationship) {
          $items[] = array(
            'path'                => "relationships/{$rtid}",
            'title'               => t($relationship->name),
            'access'              => $view_access,
            'type'                => MENU_NORMAL_ITEM|MENU_LOCAL_TASK,
            'callback'            => 'theme',
            'callback arguments'  => array('user_relationships_page', $id, $rtid),
          );
        }
      }

      $items[] = array(
        'path'                => "relationships/remove",
        'title'               => t('Remove relationship'),
        'access'              => $edit_access,
        'callback'            => 'drupal_get_form',
        'callback arguments'  => array('user_relationships_remove', $id, arg(2)),
        'type'                => MENU_CALLBACK,
      );


    $items[] = array(
      'path'                => "relationship/request",
      'title'               => t('Create a relationship'),
      'access'              => $edit_access,
      'callback'            => 'drupal_get_form',
      'callback arguments'  => array('user_relationships_request', arg(2)),
      'type'                => MENU_CALLBACK,
    );

    if (arg(0) == 'user' && $id && arg(2) == 'relationships') {
      if ($id != $user->uid) {
        $access = user_access('administer user relationships') || user_access('administer users');
        $items[] = array(
          'path'                => "user/{$id}/relationships",
          'title'               => t('Relationships'),
          'access'              => $access,
          'callback'            => 'theme',
          'callback arguments'  => array('user_relationships_page', $id),
        );
          $items[] = array(
            'path'                => "user/{$id}/relationships/list",
            'title'               => t('All'),
            'access'              => $access,
            'type'                => MENU_NORMAL_ITEM|MENU_DEFAULT_LOCAL_TASK,
            'weight'              => -10,
          );
          if (true || ($approval_required && $edit_access)) {
            $items[] = array(
              'path'                => "user/{$id}/relationships/requests",
              'title'               => t('Pending'),
              'access'              => $access,
              'callback'            => 'theme',
              'type'                => MENU_NORMAL_ITEM|MENU_LOCAL_TASK,
              'weight'              => -9,
              'callback arguments'  => array('user_relationships_pending_requests_page', $id)
            );
          }

          if (arg(0) == 'user' && arg(2) == 'relationships' && is_numeric(arg(3))) {
            $relationships = user_relationships_types_load();
            foreach ($relationships as $rtid => $relationship) {
              $items[] = array(
                'path'                => "user/{$id}/relationships/{$rtid}",
                'title'               => t($relationship->name),
                'access'              => $access,
                'type'                => MENU_NORMAL_ITEM|MENU_LOCAL_TASK,
                'callback'            => 'theme',
                'callback arguments'  => array('user_relationships_page', $id, $rtid),
              );
            }
          }
      }
      else {
        if ($_REQUEST['destination']) {
          $query = "destination={$_REQUEST['destination']}";
          unset($_REQUEST['destination']);
        }
        $items[] = array(
          'path'                => "user/{$id}/relationships",
          'type'                => MENU_CALLBACK,
          'access'              => TRUE,
          'callback'            => 'drupal_goto',
          'callback arguments'  => array(str_replace("user/{$id}/", '', $_GET['q']), $query),
        );
      }
      if (in_array(arg(4), array('approve', 'disapprove', 'cancel'))) {
        $items[] = array(
          'path'                => "user/{$id}/relationships/requested",
          'title'               => t('Approve Relationship'),
          'access'              => $access || ($id == $user->uid),
          'type'                => MENU_CALLBACK,
          'callback'            => 'drupal_get_form',
          'callback arguments'  => array('user_relationships_pending_requested', arg(4), $id, arg(5)),
        );
      }
      $items[] = array(
        'path'                => "user/{$id}/relationships/remove",
        'title'               => t('Remove relationship'),
        'access'              => $access || ($id == $user->uid),
        'callback'            => 'drupal_get_form',
        'callback arguments'  => array('user_relationships_remove', $id, arg(4)),
        'type'                => MENU_CALLBACK,
      );
    }
  }
  return $items;
}

/**
 * User
 */
function user_relationships_user($type, &$edit, &$account, $category = NULL) {
  switch($type) {
  case 'login':
    if (user_access('maintain relationships')) {
      _user_relationships_set_notifications($account);
    }
    break;

  case 'view':
    global $user;
    $viewer =& $user;

    if (($account->uid == $user->uid) && user_access('maintain relationships')) {
      _user_relationships_set_notifications($account);
      break;
    }

    $output = array();
    if ($list = _user_relationships_between($viewer, $account)) {
      $output[] = array(
        'title' => t('Your relationships to this user'),
        'value' => theme('item_list', $list),
        'class' => 'user_relationships'
      );
    }

    if ($actions = _user_relationships_actions_between($viewer, $account)) {
      $output[] = array(
        'title' => t('Relationship actions'),
        'value' => theme('item_list', $actions),
        'class' => 'user_relationships_actions'
      );
    }

    if(sizeof($output)) {
      return array(t('Relationships') => $output);
    }
    break;

  case 'delete':
    db_query("DELETE FROM {user_relationships} WHERE requester_id = %d OR requestee_id = %d", $account->uid, $account->uid);
    break;

  case 'form':
    if (($category == 'account')
      && variable_get('user_relationships_require_approval', TRUE)
      && user_access('maintain relationships', $account)
    ) {
      $form['user_relationships_settings'] = array(
        '#type'   => 'fieldset',
        '#title'  => t('Relationship settings'),
        '#weight' => 5
      );

      if (variable_get('user_relationships_allow_auto_approve', FALSE) && ($relationships = user_relationships_types_load())) {
        $options = array();
        foreach ($relationships as $relationship) {
          if ($relationship->requires_approval) {
            $options[$relationship->rtid] = $relationship->name;
          }
        }
        $form['user_relationships_settings']['user_relationships_auto_approve'] = array(
          '#type'           => 'checkboxes',
          '#title'          => t('Automatically approve the following relationship requests'),
          '#options'        => $options,
          '#default_value'  => $edit['user_relationships_auto_approve'],
          '#description'    => t("Check off the types of relationships you'd like to automatically approve.")
        );
      }
    }

    // No options have been set so don't display it
    if (sizeof($form['user_relationships_settings']) == 3) {
      unset($form['user_relationships_settings']);
    }
    return $form;
  }
}


/**
 * Cron
 */
function user_relationships_cron() {
  $now = time();

  // only expire relationships once a day
  $last_cron = variable_get('user_relationships_last_expire', 0);
  if ($now < $last_cron + 86400) {
    return FALSE;
  }

  $result = db_query(
    " SELECT ur.rid
      FROM {user_relationships} ur
        INNER JOIN {user_relationship_types} urt ON ur.rtid = urt.rtid
        WHERE ur.approved = 0
          AND urt.expires_val > 0
        AND ur.updated_at < (%d - (urt.expires_val * 86400))
      GROUP BY ur.rid", $now
    );

  $expired_requests = array();
  while ($request = db_fetch_object($result)) {
    $expired_requests[$request->rid] = $request;
  }

  if ($expired_requests) {
    $placeholders = implode(', ', array_fill(0, count($expired_requests), '%d'));
    db_query('DELETE FROM {user_relationships} WHERE rid IN ('. $placeholders .')', $expired_requests);
    _user_relationships_invoke('delete', $expired_requests);
  }

  // remember when we last expired relationships
  variable_set('user_relationships_last_expire', $now);
  return TRUE;
}