path: root/modules/user.module

<?php
// $Id$

/**
 * @file
 * Enables the user registration and login system.
 */

/**
 * Invokes hook_user() in every module.
 *
 * We cannot use module_invoke() for this, because the arguments need to
 * be passed by reference.
 */
function user_module_invoke($type, &$array, &$user, $category = NULL) {
  foreach (module_list() as $module) {
    $function = $module .'_user';
    if (function_exists($function)) {
      $function($type, $array, $user, $category);
    }
  }
}

function user_external_load($authname) {
  $result = db_query("SELECT uid FROM {authmap} WHERE authname = '%s'", $authname);

  if ($user = db_fetch_object($result)) {
    return user_load($user);
  }
  else {
    return 0;
  }
}

/**
 * Fetch a user object.
 *
 * @param $array
 *   An associative array of attributes to search for in selecting the
 *   user, such as user name or e-mail address.
 *
 * @return
 *   A fully-loaded $user object upon successful user load or FALSE if user cannot be loaded.
 */
function user_load($array = array()) {
  // Dynamically compose a SQL query:
  $query = array();
  $params = array();

  foreach ($array as $key => $value) {
    if ($key == 'uid' || $key == 'status') {
      $query[] = "$key = %d";
      $params[] = $value;
    }
    else if ($key == 'pass') {
      $query[] = "pass = '%s'";
      $params[] = md5($value);
    }
    else {
      $query[]= "LOWER($key) = LOWER('%s')";
      $params[] = $value;
    }
  }
  $result = db_query('SELECT * FROM {users} u WHERE ' . implode(' AND ', $query), $params);

  if (db_num_rows($result)) {
    $user = db_fetch_object($result);
    $user = drupal_unpack($user);

    $user->roles = array();
    if ($user->uid) {
      $user->roles[DRUPAL_AUTHENTICATED_RID] = 'authenticated user';
    }
    else {
      $user->roles[DRUPAL_ANONYMOUS_RID] = 'anonymous user';
    }
    $result = db_query('SELECT r.rid, r.name FROM {role} r INNER JOIN {users_roles} ur ON ur.rid = r.rid WHERE ur.uid = %d', $user->uid);
    while ($role = db_fetch_object($result)) {
      $user->roles[$role->rid] = $role->name;
    }
    user_module_invoke('load', $array, $user);
  }
  else {
    $user = FALSE;
  }

  return $user;
}

/**
 * Save changes to a user account.
 *
 * @param $account
 *   The $user object for the user to modify.
 *
 * @param $array
 *   An array of fields and values to save. For example array('name' => 'My name');
 *   Setting a field to null deletes it from the data column.
 *
 * @param $category
 *   (optional) The category for storing profile information in.
 */
function user_save($account, $array = array(), $category = 'account') {
  // Dynamically compose a SQL query:
  $user_fields = user_fields();
  if ($account->uid) {
    user_module_invoke('update', $array, $account, $category);

    $data = unserialize(db_result(db_query('SELECT data FROM {users} WHERE uid = %d', $account->uid)));
    foreach ($array as $key => $value) {
      if ($key == 'pass' && !empty($value)) {
        $query .= "$key = '%s', ";
        $v[] = md5($value);
      }
      else if ((substr($key, 0, 4) !== 'auth') && ($key != 'pass')) {
        if (in_array($key, $user_fields)) {
          // Save standard fields
          $query .= "$key = '%s', ";
          $v[] = $value;
        }
        else if ($key != 'roles') {
          // Roles is a special case: it used below.
          if ($value === null) {
            unset($data[$key]);
          }
          else {
            $data[$key] = $value;
          }
        }
      }
    }
    $query .= "data = '%s' ";
    $v[] = serialize($data);

    db_query("UPDATE {users} SET $query WHERE uid = %d", array_merge($v, array($account->uid)));

    // Reload user roles if provided
    if (is_array($array['roles'])) {
      db_query('DELETE FROM {users_roles} WHERE uid = %d', $account->uid);

      foreach (array_keys($array['roles']) as $rid) {
        if (!in_array($rid, array(DRUPAL_ANONYMOUS_RID, DRUPAL_AUTHENTICATED_RID))) {
          db_query('INSERT INTO {users_roles} (uid, rid) VALUES (%d, %d)', $account->uid, $rid);
        }
      }
    }

    // Delete a blocked user's sessions to kick them if they are online.
    if (isset($array['status']) && $array['status'] == 0) {
      db_query('DELETE FROM {sessions} WHERE uid = %d', $account->uid);
    }

    // Refresh user object
    $user = user_load(array('uid' => $account->uid));
  }
  else {
    $array['created'] = time();
    $array['uid'] = db_next_id('{users}_uid');

    // Note, we wait with saving the data column to prevent module-handled
    // fields from being saved there. We cannot invoke hook_user('insert') here
    // because we don't have a fully initialized user object yet.
    foreach ($array as $key => $value) {
      switch($key) {
        case 'pass':
          $fields[] = $key;
          $values[] = md5($value);
          $s[] = "'%s'";
          break;          
        case 'uid':        case 'mode':     case 'sort':
        case 'threshold':  case 'created':  case 'access':
        case 'login':      case 'status':
          $fields[] = $key;
          $values[] = $value;
          $s[] = "%d";
          break;
        default:
          if (substr($key, 0, 4) !== 'auth' && in_array($key, $user_fields)) {
            $fields[] = $key;
            $values[] = $value;
            $s[] = "'%s'";
          }
          break;
      }
    }
    db_query('INSERT INTO {users} ('. implode(', ', $fields) .') VALUES ('. implode(', ', $s) .')', $values);

    // Reload user roles (delete just to be safe).
    db_query('DELETE FROM {users_roles} WHERE uid = %d', $array['uid']);
    foreach ((array)$array['roles'] as $rid) {
      db_query('INSERT INTO {users_roles} (uid, rid) VALUES (%d, %d)', $array['uid'], $rid);
    }

    // Build the initial user object.
    $user = user_load(array('uid' => $array['uid']));

    user_module_invoke('insert', $array, $user, $category);

    // Build and save the serialized data field now
    $data = array();
    foreach ($array as $key => $value) {
      if ((substr($key, 0, 4) !== 'auth') && ($key != 'roles') && (!in_array($key, $user_fields)) && ($value !== null)) {
        $data[$key] = $value;
      }
    }
    db_query("UPDATE {users} SET data = '%s' WHERE uid = %d", serialize($data), $user->uid);

    // Build the finished user object.
    $user = user_load(array('uid' => $array['uid']));
  }

  // Save distributed authentication mappings
  $authmaps = array();
  foreach ($array as $key => $value) {
    if (substr($key, 0, 4) == 'auth') {
      $authmaps[$key] = $value;
    }
  }
  if (sizeof($authmaps) > 0) {
    user_set_authmaps($user, $authmaps);
  }

  return $user;
}

/**
 * Verify the syntax of the given name.
 */
function user_validate_name($name) {
  if (!strlen($name)) return t('You must enter a username.');
  if (substr($name, 0, 1) == ' ') return t('The username cannot begin with a space.');
  if (substr($name, -1) == ' ') return t('The username cannot end with a space.');
  if (ereg('  ', $name)) return t('The username cannot contain multiple spaces in a row.');
  if (ereg("[^\x80-\xF7 [:alnum:]@_.-]", $name)) return t('The username contains an illegal character.');
  if (preg_match('/[\x{80}-\x{A0}'.          // Non-printable ISO-8859-1 + NBSP
                   '\x{AD}'.                 // Soft-hyphen
                   '\x{2000}-\x{200F}'.      // Various space characters
                   '\x{2028}-\x{202F}'.      // Bidirectional text overrides
                   '\x{205F}-\x{206F}'.      // Various text hinting characters
                   '\x{FEFF}'.               // Byte order mark
                   '\x{FF01}-\x{FF60}'.      // Full-width latin
                   '\x{FFF9}-\x{FFFD}]/u',   // Replacement characters
                   $name)) {
    return t('The username contains an illegal character.');
  }
  if (ereg('@', $name) && !eregi('@([0-9a-z](-?[0-9a-z])*.)+[a-z]{2}([zmuvtg]|fo|me)?$', $name)) return t('The username is not a valid authentication ID.');
  if (strlen($name) > 56) return t('The username %name is too long: it must be less than 56 characters.', array('%name' => theme('placeholder', $name)));
}

function user_validate_mail($mail) {
  if (!$mail) return t('You must enter an e-mail address.');
  if (!valid_email_address($mail)) {
    return t('The e-mail address %mail is not valid.', array('%mail' => theme('placeholder', $mail)));
  }
}

function user_validate_picture($file, &$edit, $user) {
  global $form_values;
  // Initialize the picture:
  $form_values['picture'] = $user->picture;

  // Check that uploaded file is an image, with a maximum file size
  // and maximum height/width.
  $info = image_get_info($file->filepath);
  list($maxwidth, $maxheight) = explode('x', variable_get('user_picture_dimensions', '85x85'));

  if (!$info || !$info['extension']) {
    form_set_error('picture_upload', t('The uploaded file was not an image.'));
  }
  else if (image_get_toolkit()) {
    image_scale($file->filepath, $file->filepath, $maxwidth, $maxheight);
  }
  else if (filesize($file->filepath) > (variable_get('user_picture_file_size', '30') * 1000)) {
    form_set_error('picture_upload', t('The uploaded image is too large; the maximum file size is %size kB.', array('%size' => variable_get('user_picture_file_size', '30'))));
  }
  else if ($info['width'] > $maxwidth || $info['height'] > $maxheight) {
    form_set_error('picture_upload', t('The uploaded image is too large; the maximum dimensions are %dimensions pixels.', array('%dimensions' => variable_get('user_picture_dimensions', '85x85'))));
  }

  if (!form_get_errors()) {
    if ($file = file_save_upload('picture_upload', variable_get('user_picture_path', 'pictures') .'/picture-'. $user->uid . '.' . $info['extension'], 1)) {
      $form_values['picture'] = $file->filepath;
    }
    else {
      form_set_error('picture_upload', t("Failed to upload the picture image; the %directory directory doesn't exist.", array('%directory' => '<em>'. variable_get('user_picture_path', 'pictures') .'</em>')));
    }
  }
}

/**
 * Generate a random alphanumeric password.
 */
function user_password($length = 10) {
  // This variable contains the list of allowable characters for the
  // password.  Note that the number 0 and the letter 'O' have been
  // removed to avoid confusion between the two.  The same is true
  // of 'I', 1, and l.
  $allowable_characters = 'abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ23456789';

  // Zero-based count of characters in the allowable list:
  $len = strlen($allowable_characters) - 1;

  // Declare the password as a blank string.
  $pass = '';

  // Loop the number of times specified by $length.
  for ($i = 0; $i < $length; $i++) {

    // Each iteration, pick a random character from the
    // allowable string and append it to the password:
    $pass .= $allowable_characters[mt_rand(0, $len)];
  }

  return $pass;
}

/**
 * Determine whether the user has a given privilege.
 *
 * @param $string
 *   The permission, such as "administer nodes", being checked for.
 * @param $account
 *   (optional) The account to check, if not given use currently logged in user.
 *
 * @return
 *   boolean TRUE if the current user has the requested permission.
 *
 * All permission checks in Drupal should go through this function. This
 * way, we guarantee consistent behavior, and ensure that the superuser
 * can perform all actions.
 */
function user_access($string, $account = NULL) {
  global $user;
  static $perm = array();

  if (is_null($account)) {
    $account = $user;
  }

  // User #1 has all privileges:
  if ($account->uid == 1) {
    return TRUE;
  }

  // To reduce the number of SQL queries, we cache the user's permissions
  // in a static variable.
  if (!isset($perm[$account->uid])) {
    $result = db_query("SELECT DISTINCT(p.perm) FROM {role} r INNER JOIN {permission} p ON p.rid = r.rid WHERE r.rid IN (%s)", implode(',', array_keys($account->roles)));

    $perm[$account->uid] = '';
    while ($row = db_fetch_object($result)) {
      $perm[$account->uid] .= "$row->perm, ";
    }
  }

  if (isset($perm[$account->uid])) {
    return strpos($perm[$account->uid], "$string, ") !== FALSE;
  }

  return FALSE;
}

/**
 * Checks for usernames blocked by user administration
 *
 * @return boolean true for blocked users, false for active
 */
function user_is_blocked($name) {
  $allow = db_fetch_object(db_query("SELECT * FROM {users} WHERE status = 1 AND name = LOWER('%s')", $name));
  $deny  = db_fetch_object(db_query("SELECT * FROM {users} WHERE status = 0 AND name = LOWER('%s')", $name));

  return $deny && !$allow;
}

/**
 * Send an e-mail message.
 */
function user_mail($mail, $subject, $message, $header) {
  if (variable_get('smtp_library', '') && file_exists(variable_get('smtp_library', ''))) {
   include_once './' . variable_get('smtp_library', '');
    return user_mail_wrapper($mail, $subject, $message, $header);
  }
  else {
    /*
    ** Note: if you are having problems with sending mail, or mails look wrong
    ** when they are received you may have to modify the str_replace to suit
    ** your systems.
    **  - \r\n will work under dos and windows.
    **  - \n will work for linux, unix and BSDs.
    **  - \r will work for macs.
    **
    ** According to RFC 2646, it's quite rude to not wrap your e-mails:
    **
    ** "The Text/Plain media type is the lowest common denominator of
    ** Internet e-mail, with lines of no more than 997 characters (by
    ** convention usually no more than 80), and where the CRLF sequence
    ** represents a line break [MIME-IMT]."
    **
    ** CRLF === \r\n
    **
    ** http://www.rfc-editor.org/rfc/rfc2646.txt
    **
    */
    return mail(
      $mail,
      mime_header_encode($subject),
      str_replace("\r", '', $message),
      "MIME-Version: 1.0\nContent-Type: text/plain; charset=UTF-8; format=flowed\nContent-transfer-encoding: 8Bit\n" . $header
    );
  }
}

function user_fields() {
  static $fields;

  if (!$fields) {
    $result = db_query('SELECT * FROM {users} WHERE uid = 1');
    if (db_num_rows($result)) {
      $fields = array_keys(db_fetch_array($result));
    }
    else {
      // Make sure we return the default fields at least
      $fields = array('uid', 'name', 'pass', 'mail', 'picture', 'mode', 'sort', 'threshold', 'theme', 'signature', 'created', 'access', 'login', 'status', 'timezone', 'language', 'init', 'data');
    }
  }

  return $fields;
}

/**
 * Implementation of hook_perm().
 */
function user_perm() {
  return array('administer access control', 'administer users', 'access user profiles', 'change own username');
}

/**
 * Implementation of hook_file_download().
 *
 * Ensure that user pictures (avatars) are always downloadable.
 */
function user_file_download($file) {
  if (strpos($file, variable_get('user_picture_path', 'pictures') .'/picture-') === 0) {
    $info = image_get_info(file_create_path($file));
    return array('Content-type: '. $info['mime_type']);
  }
}

/**
 * Implementation of hook_search().
 */
function user_search($op = 'search', $keys = null) {
  switch ($op) {
    case 'name':
      if (user_access('access user profiles')) {
        return t('users');
      }
    case 'search':
      if (user_access('access user profiles')) {
        $find = array();
        // Replace wildcards with MySQL/PostgreSQL wildcards.
        $keys = preg_replace('!\*+!', '%', $keys);
        $result = pager_query("SELECT * FROM {users} WHERE LOWER(name) LIKE LOWER('%%%s%%')", 15, 0, NULL, $keys);
        while ($account = db_fetch_object($result)) {
          $find[] = array('title' => $account->name, 'link' => url('user/'. $account->uid));
        }
        return $find;
      }
  }
}

/**
 * Implementation of hook_user().
 */
function user_user($type, &$edit, &$user, $category = NULL) {
  if ($type == 'view') {
    $items[] = array('title' => t('Member for'),
      'value' => format_interval(time() - $user->created),
      'class' => 'member',
    );

    return array(t('History') => $items);
  }
  if ($type == 'form' && $category == 'account') {
    return user_edit_form(arg(1), $edit);
  }

  if ($type == 'validate' && $category == 'account') {
    return _user_edit_validate(arg(1), $edit);
  }

  if ($type == 'submit' && $category == 'account') {
    return _user_edit_submit(arg(1), $edit);
  }

  if ($type == 'categories') {
    return array(array('name' => 'account', 'title' => t('account settings'), 'weight' => 1));
  }
}

/**
 * Implementation of hook_block().
 */
function user_block($op = 'list', $delta = 0, $edit = array()) {
  global $user;

  if ($op == 'list') {
     $blocks[0]['info'] = t('User login');
     $blocks[1]['info'] = t('Navigation');
     $blocks[2]['info'] = t('Who\'s new');
     $blocks[3]['info'] = t('Who\'s online');

     return $blocks;
  }
  else if ($op == 'configure' && $delta == 3) {
    $period = drupal_map_assoc(array(30, 60, 120, 180, 300, 600, 900, 1800, 2700, 3600, 5400, 7200, 10800, 21600, 43200, 86400), 'format_interval');
    $form['user_block_seconds_online'] = array('#type' => 'select', '#title' => t('User activity'), '#default_value' => variable_get('user_block_seconds_online', 900), '#options' => $period, '#description' => t('A user is considered online for this long after they have last viewed a page.'));
    $form['user_block_max_list_count'] = array('#type' => 'select', '#title' => t('User list length'), '#default_value' => variable_get('user_block_max_list_count', 10), '#options' => drupal_map_assoc(array(0, 5, 10, 15, 20, 25, 30, 40, 50, 75, 100)), '#description' => t('Maximum number of currently online users to display.'));

    return $form;
  }
  else if ($op == 'save' && $delta == 3) {
    variable_set('user_block_seconds_online', $edit['user_block_seconds_online']);
    variable_set('user_block_max_list_count', $edit['user_block_max_list_count']);
  }
  else if ($op == 'view') {
    $block = array();

    switch ($delta) {
      case 0:
        // For usability's sake, avoid showing two login forms on one page.
        if (!$user->uid && !(arg(0) == 'user' && !is_numeric(arg(1)))) {
          $form['#action'] = url($_GET['q'], drupal_get_destination());
          $form['#id'] = 'user-login-form';
          $form['name'] = array('#type' => 'textfield',
            '#title' => t('Username'),
            '#maxlength' => 60,
            '#size' => 15,
            '#required' => TRUE,
          );
          $form['pass'] = array('#type' => 'password',
            '#title' => t('Password'),
            '#size' => 15,
            '#required' => TRUE,
          );
          $form['submit'] = array('#type' => 'submit',
            '#value' => t('Log in'),
          );

          if (variable_get('user_register', 1)) {
            $items[] = l(t('Create new account'), 'user/register', array('title' => t('Create a new user account.')));
          }
          $items[] = l(t('Request new password'), 'user/password', array('title' => t('Request new password via e-mail.')));
          $form['links'] = array('#value' => theme('item_list', $items));

          $output .= drupal_get_form('user_login_block', $form, 'user_login');

          $block['subject'] = t('User login');
          $block['content'] = $output;
        }
        return $block;

      case 1:
        if ($menu = theme('menu_tree')) {
           $block['subject'] = $user->uid ? $user->name : t('Navigation');
           $block['content'] = $menu;
        }
        return $block;

      case 2:
        if (user_access('access content')) {
          // Retrieve a list of new users who have subsequently accessed the site successfully.
          $result = db_query_range('SELECT uid, name FROM {users} WHERE status != 0 AND access != 0 ORDER BY created DESC', 0, 5);
          while ($account = db_fetch_object($result)) {
            $items[] = $account;
          }
          $output = theme('user_list', $items);

          $block['subject'] = t('Who\'s new');
          $block['content'] = $output;
        }
        return $block;

      case 3:
        if (user_access('access content')) {
          // Count users with activity in the past defined period.
          $time_period = variable_get('user_block_seconds_online', 2700);

          // Perform database queries to gather online user lists.
          $guests = db_fetch_object(db_query('SELECT COUNT(sid) AS count FROM {sessions} WHERE timestamp >= %d AND uid = 0', time() - $time_period));
          $users = db_query('SELECT uid, name, access FROM {users} WHERE access >= %d AND uid != 0 ORDER BY access DESC', time() - $time_period);
          $total_users = db_num_rows($users);

          // Format the output with proper grammar.
          if ($total_users == 1 && $guests->count == 1) {
            $output = t('There is currently %members and %visitors online.', array('%members' => format_plural($total_users, '1 user', '%count users'), '%visitors' => format_plural($guests->count, '1 guest', '%count guests')));
          }
          else {
            $output = t('There are currently %members and %visitors online.', array('%members' => format_plural($total_users, '1 user', '%count users'), '%visitors' => format_plural($guests->count, '1 guest', '%count guests')));
          }

          // Display a list of currently online users.
          $max_users = variable_get('user_block_max_list_count', 10);
          $items = array();

          while ($max_users-- && $account = db_fetch_object($users)) {
            $items[] = $account;
          }

          $output .= theme('user_list', $items, t('Online users'));

          $block['subject'] = t('Who\'s online');
          $block['content'] = $output;
        }
        return $block;
    }
  }
}

function theme_user_picture($account) {
  if (variable_get('user_pictures', 0)) {
    if ($account->picture && file_exists($account->picture)) {
      $picture = file_create_url($account->picture);
    }
    else if (variable_get('user_picture_default', '')) {
      $picture = variable_get('user_picture_default', '');
    }

    if (isset($picture)) {
      $alt = t('%user\'s picture', array('%user' => $account->name ? $account->name : variable_get('anonymous', 'Anonymous')));
      $picture = theme('image', $picture, $alt, $alt, '', false);
      if (!empty($account->uid) && user_access('access user profiles')) {
        $picture = l($picture, "user/$account->uid", array('title' => t('View user profile.')), NULL, NULL, FALSE, TRUE);
      }

      return "<div class=\"picture\">$picture</div>";
    }
  }
}

/**
 * Theme a user page
 * @param $account the user object
 * @param $fields a multidimensional array for the fields, in the form of array (
 *   'category1' => array(item_array1, item_array2), 'category2' => array(item_array3,
 *    .. etc.). Item arrays are formatted as array(array('title' => 'item title',
 * 'value' => 'item value', 'class' => 'class-name'), ... etc.). Module names are incorporated
 * into the CSS class.
 *
 * @ingroup themeable
 */
function theme_user_profile($account, $fields) {
  $output = '<div class="profile">';
  $output .= theme('user_picture', $account);
  foreach ($fields as $category => $items) {
    if (strlen($category) > 0) {
      $output .= '<h2 class="title">'. $category .'</h2>';
    }
    $output .= '<dl>';
    foreach ($items as $item) {
      if (isset($item['title'])) {
        $output .= '<dt class="'. $item['class'] .'">'. $item['title'] .'</dt>';
      }
      $output .= '<dd class="'. $item['class'] .'">'. $item['value'] .'</dd>';
    }
    $output .= '</dl>';
  }
  $output .= '</div>';

  return $output;
}

/**
 * Make a list of users.
 * @param $items an array with user objects. Should contain at least the name and uid
 *
 * @ingroup themeable
 */
function theme_user_list($users, $title = NULL) {
  if (!empty($users)) {
    foreach ($users as $user) {
      $items[] = theme('username', $user);
    }
  }
  return theme('item_list', $items, $title);
}

/**
 * Implementation of hook_menu().
 */
function user_menu($may_cache) {
  global $user;

  $items = array();

  $admin_access = user_access('administer users');
  $access_access = user_access('administer access control');
  $view_access = user_access('access user profiles');

  if ($may_cache) {
    $items[] = array('path' => 'user', 'title' => t('user account'),
      'callback' => 'user_login', 'access' => TRUE, 'type' => MENU_CALLBACK);

    $items[] = array('path' => 'user/autocomplete', 'title' => t('user autocomplete'),
      'callback' => 'user_autocomplete', 'access' => $view_access, 'type' => MENU_CALLBACK);

    // Registration and login pages.
    $items[] = array('path' => 'user/login', 'title' => t('log in'),
      'callback' => 'user_login', 'type' => MENU_DEFAULT_LOCAL_TASK);
    $items[] = array('path' => 'user/register', 'title' => t('register'),
      'callback' => 'user_register', 'access' => $user->uid == 0 && variable_get('user_register', 1), 'type' => MENU_LOCAL_TASK);
    $items[] = array('path' => 'user/password', 'title' => t('request new password'),
      'callback' => 'user_pass', 'access' => $user->uid == 0, 'type' => MENU_LOCAL_TASK);
    $items[] = array('path' => 'user/reset', 'title' => t('reset password'),
      'callback' => 'user_pass_reset', 'access' => TRUE, 'type' => MENU_CALLBACK);
    $items[] = array('path' => 'user/help', 'title' => t('help'),
      'callback' => 'user_help_page', 'type' => MENU_CALLBACK);

    // Admin user pages
    $items[] = array('path' => 'admin/user', 'title' => t('users'),
      'callback' => 'user_admin', 'access' => $admin_access);
    $items[] = array('path' => 'admin/user/list', 'title' => t('list'),
      'type' => MENU_DEFAULT_LOCAL_TASK, 'weight' => -10);
    $items[] = array('path' => 'admin/user/create', 'title' => t('add user'),
      'callback' => 'user_admin', 'access' => $admin_access,
      'type' => MENU_LOCAL_TASK);
    $items[] = array('path' => 'admin/settings/user', 'title' => t('users'),
      'callback' => 'user_configure');

    // Admin access pages
    $items[] = array('path' => 'admin/access', 'title' => t('access control'),
      'callback' => 'user_admin_perm', 'access' => $access_access);
    $items[] = array('path' => 'admin/access/permissions', 'title' => t('permissions'),
      'callback' => 'user_admin_perm', 'access' => $access_access,
      'type' => MENU_DEFAULT_LOCAL_TASK, 'weight' => -10);
    $items[] = array('path' => 'admin/access/roles', 'title' => t('roles'),
      'callback' => 'user_admin_role', 'access' => $access_access,
      'type' => MENU_LOCAL_TASK);
    $items[] = array('path' => 'admin/access/roles/edit', 'title' => t('edit role'),
      'callback' => 'user_admin_role', 'access' => $access_access,
      'type' => MENU_CALLBACK);
    $items[] = array('path' => 'admin/access/rules', 'title' => t('access rules'),
      'callback' => 'user_admin_access', 'access' => $access_access,
      'type' => MENU_LOCAL_TASK, 'weight' => 10);
    $items[] = array('path' => 'admin/access/rules/list', 'title' => t('list'),
      'access' => $access_access, 'type' => MENU_DEFAULT_LOCAL_TASK, 'weight' => -10);
    $items[] = array('path' => 'admin/access/rules/add', 'title' => t('add rule'),
      'callback' => 'user_admin_access_add', 'access' => $access_access,
      'type' => MENU_LOCAL_TASK);
    $items[] = array('path' => 'admin/access/rules/check', 'title' => t('check rules'),
      'callback' => 'user_admin_access_check', 'access' => $access_access,
      'type' => MENU_LOCAL_TASK);
    $items[] = array('path' => 'admin/access/rules/edit', 'title' => t('edit rule'),
      'callback' => 'user_admin_access_edit', 'access' => $access_access,
      'type' => MENU_CALLBACK);
    $items[] = array('path' => 'admin/access/rules/delete', 'title' => t('delete rule'),
      'callback' => 'user_admin_access_delete', 'access' => $access_access,
      'type' => MENU_CALLBACK);

    if (module_exist('search')) {
      $items[] = array('path' => 'admin/user/search', 'title' => t('search'),
        'callback' => 'user_admin', 'access' => $admin_access,
        'type' => MENU_LOCAL_TASK);
    }

    // Your personal page
    if ($user->uid) {
      $items[] = array('path' => 'user/'. $user->uid, 'title' => t('my account'),
        'callback' => 'user_view', 'callback arguments' => array(arg(1)), 'access' => TRUE,
        'type' => MENU_DYNAMIC_ITEM);
    }

    $items[] = array('path' => 'logout', 'title' => t('log out'),
      'access' => $user->uid != 0,
      'callback' => 'user_logout',
      'weight' => 10);
  }
  else {
    if (arg(0) == 'user' && is_numeric(arg(1))) {
      $account = user_load(array('uid' => arg(1)));

      if ($user !== FALSE) {
        // Always let a user view their own account
        $view_access |= $user->uid == arg(1);
        // Only admins can view blocked accounts
        $view_access &= $account->status || $admin_access; 

        $items[] = array('path' => 'user/'. arg(1), 'title' => t('user'),
          'type' => MENU_CALLBACK, 'callback' => 'user_view',
          'callback arguments' => array(arg(1)), 'access' => $view_access);        

        $items[] = array('path' => 'user/'. arg(1) .'/view', 'title' => t('view'),
          'access' => $view_access, 'type' => MENU_DEFAULT_LOCAL_TASK, 'weight' => -10);

        $items[] = array('path' => 'user/'. arg(1) .'/edit', 'title' => t('edit'),
          'callback' => 'user_edit', 'access' => $admin_access || $user->uid == arg(1),
          'type' => MENU_LOCAL_TASK);
        $items[] = array('path' => 'user/'. arg(1) .'/delete', 'title' => t('delete'),
          'callback' => 'user_edit', 'access' => $admin_access,
          'type' => MENU_CALLBACK);

        if (arg(2) == 'edit') {
          if (($categories = _user_categories()) && (count($categories) > 1)) {
            foreach ($categories as $key => $category) {
              $items[] = array(
                'path' => 'user/'. arg(1) .'/edit/'. $category['name'],
                'title' => $category['title'],
                'type' => $category['name'] == 'account' ? MENU_DEFAULT_LOCAL_TASK : MENU_LOCAL_TASK,
                'weight' => $category['weight'],
                'access' => ($admin_access || $user->uid == arg(1)));
            }
          }
        }
      }
    }
  }

  return $items;
}

/**
 * Accepts an user object, $account, or a DA name and returns an associative
 * array of modules and DA names. Called at external login.
 */
function user_get_authmaps($authname = NULL) {
  $result = db_query("SELECT authname, module FROM {authmap} WHERE authname = '%s'", $authname);
  if (db_num_rows($result) > 0) {
    while ($authmap = db_fetch_object($result)) {
      $authmaps[$authmap->module] = $authmap->authname;
    }
    return $authmaps;
  }
  else {
    return 0;
  }
}

function user_set_authmaps($account, $authmaps) {
  foreach ($authmaps as $key => $value) {
    $module = explode('_', $key, 2);
    if ($value) {
      db_query("UPDATE {authmap} SET authname = '%s' WHERE uid = %d AND module = '%s'", $value, $account->uid, $module['1']);
      if (!db_affected_rows()) {
        db_query("INSERT INTO {authmap} (authname, uid, module) VALUES ('%s', %d, '%s')", $value, $account->uid, $module[1]);
      }
    }
    else {
      db_query("DELETE FROM {authmap} WHERE uid = %d AND module = '%s'", $account->uid, $module['1']);
    }
  }
}

function user_auth_help_links() {
  $links = array();
  foreach (module_list() as $module) {
    if (module_hook($module, 'auth')) {
      $links[] = l(module_invoke($module, 'info', 'name'), "user/help#$module");
    }
  }
  return $links;
}

/*** User features *********************************************************/



function user_login($msg = '') {
  global $user, $base_url;

  // If we are already logged on, go to the user page instead.
  if ($user->uid) {
    drupal_goto('user/'. $user->uid);
  }

  // Display login form:
  if ($msg) {
    $form['message'] = array('#value' => "<p>$msg</p>");
  }
  $form['name'] = array('#type' => 'textfield',
    '#title' => t('Username'),
    '#size' => 30,
    '#maxlength' => 60,
    '#required' => TRUE,
    '#attributes' => array('tabindex' => '1'),
  );
  if (variable_get('drupal_authentication_service', FALSE) && count(user_auth_help_links()) > 0) {
    $form['name']['#description'] = t('Enter your %s username, or an ID from one of our affiliates: %a.', array('%s' => variable_get('site_name', 'local'), '%a' => implode(', ', user_auth_help_links())));
  }
  else {
    $form['name']['#description'] = t('Enter your %s username.', array('%s' => variable_get('site_name', 'local')));
  }
  $form['pass'] = array('#type' => 'password',
    '#title' => t('Password'),
    '#description' => t('Enter the password that accompanies your username.'),
    '#required' => TRUE,
    '#attributes' => array('tabindex' => '2'),
  );
  $form['submit'] = array('#type' => 'submit', '#value' => t('Log in'), '#weight' => 2, '#attributes' => array('tabindex' => '3'));
  return drupal_get_form('user_login', $form);
}

function user_login_validate($form_id, $form_values) {
  if ($form_values['name']) {
    if (user_is_blocked($form_values['name'])) {
      // blocked in user administration
      form_set_error('login', t('The username %name has been blocked.', array('%name' => theme('placeholder', $form_values['name']))));
    }
    else if (drupal_is_denied('user', $form_values['name'])) {
      // denied by access controls
      form_set_error('login', t('The name %name is a reserved username.', array('%name' => theme('placeholder', $form_values['name']))));
    }
    else if ($form_values['pass']) {
      $user = user_authenticate($form_values['name'], trim($form_values['pass']));

      if (!$user->uid) {
        form_set_error('login', t('Sorry. Unrecognized username or password.') .' '. l(t('Have you forgotten your password?'), 'user/password'));
        watchdog('user', t('Login attempt failed for %user.', array('%user' => theme('placeholder', $form_values['name']))));
      }
    }
  }
}

function user_login_submit($form_id, $form_values) {
  global $user;
  if ($user->uid) {
    watchdog('user', t('Session opened for %name.', array('%name' => theme('placeholder', $user->name))));

    // Update the user table timestamp noting user has logged in.
    db_query("UPDATE {users} SET login = %d WHERE uid = %d", time(), $user->uid);

    user_module_invoke('login', $form_values, $user);

    $old_session_id = session_id();
    session_regenerate_id();
    db_query("UPDATE {sessions} SET sid = '%s' WHERE sid = '%s'", session_id(), $old_session_id);

  }
}

function user_authenticate($name, $pass) {
  global $user;

  // Try to log in the user locally. Don't set $user unless successful.
  if ($account = user_load(array('name' => $name, 'pass' => $pass, 'status' => 1))) {
    $user = $account;
  };

  // Strip name and server from ID:
  if ($server = strrchr($name, '@')) {
    $name = substr($name, 0, strlen($name) - strlen($server));
    $server = substr($server, 1);
  }

  // When possible, determine corresponding external auth source. Invoke
  // source, and log in user if successful:
  if (!$user->uid && $server && $result = user_get_authmaps("$name@$server")) {
    if (module_invoke(key($result), 'auth', $name, $pass, $server)) {
      $user = user_external_load("$name@$server");
      watchdog('user', t('External load by %user using module %module.', array('%user' => theme('placeholder', $name .'@'. $server), '%module' => theme('placeholder', key($result)))));
    }
    else {
      $error = t('Invalid password for %s.', array('%s' => theme('placeholder', $name .'@'. $server)));
    }
  }

  // Try each external authentication source in series. Register user if
  // successful.
  else if (!$user->uid && $server) {
    foreach (module_list() as $module) {
      if (module_hook($module, 'auth')) {
        if (module_invoke($module, 'auth', $name, $pass, $server)) {
          if (variable_get('user_register', 1) == 1) {
            $account = user_load(array('name' => "$name@$server"));
            if (!$account->uid) { // Register this new user.
              $user = user_save('', array('name' => "$name@$server", 'pass' => user_password(), 'init' => "$name@$server", 'status' => 1, "authname_$module" => "$name@$server"));
              watchdog('user', t('New external user: %user using module %module.', array('%user' => theme('placeholder', $name .'@'. $server), '%module' => theme('placeholder', $module))), WATCHDOG_NOTICE, l(t('edit'), 'user/'. $user->uid .'/edit'));
              break;
            }
          }
        }
      }
    }
  }
  return $user;
}

/**
 * Menu callback; logs the current user out, and redirects to the home page.
 */
function user_logout() {
  global $user;

  watchdog('user', t('Session closed for %name.', array('%name' => theme('placeholder', $user->name))));

  // Destroy the current session:
  session_destroy();
  module_invoke_all('user', 'logout', NULL, $user);

  // We have to use $GLOBALS to unset a global variable:
  $user = user_load(array('uid' => 0));

  drupal_goto();
}

function user_pass() {

  // Display form:
  $form['name'] = array('#type' => 'textfield',
    '#title' => t('Username'),
    '#size' => 30,
    '#maxlength' => 60,
  );
  $form['mail'] = array('#type' => 'textfield',
    '#title' => t('E-mail address'),
    '#size' => 30,
    '#maxlength' => 64,
  );
  $form['submit'] = array('#type' => 'submit',
    '#value' => t('E-mail new password'),
    '#weight' => 2,
  );
  return drupal_get_form('user_pass', $form);
}

function user_pass_validate() {
  global $form_values;

  $name = $form_values['name'];
  $mail = $form_values['mail'];
  if ($name && !($form_values['account'] = user_load(array('name' => $name, 'status' => 1)))) {
    form_set_error('name', t('Sorry. The username %name is not recognized.', array('%name' => theme('placeholder', $name))));
  }
  else if ($mail && !($form_values['account'] = user_load(array('mail' => $mail, 'status' => 1)))) {
    form_set_error('mail', t('Sorry. The e-mail address %email is not recognized.', array('%email' => theme('placeholder', $mail))));
  }
  else if (!$mail && !$name) {
    form_set_error('password', t('You must provide either a username or e-mail address.'));
  }
}

function user_pass_submit($form_id, $form_values) {
  global $base_url;

  $account = $form_values['account'];
  $from = variable_get('site_mail', ini_get('sendmail_from'));

  // Mail one time login URL and instructions.
  $variables = array('%username' => $account->name, '%site' => variable_get('site_name', 'drupal'), '%login_url' => user_pass_reset_url($account), '%uri' => $base_url, '%uri_brief' => substr($base_url, strlen('http://')), '%mailto' => $account->mail, '%date' => format_date(time()), '%login_uri' => url('user', NULL, NULL, TRUE), '%edit_uri' => url('user/'. $account->uid .'/edit', NULL, NULL, TRUE));
  $subject = _user_mail_text('pass_subject', $variables);
  $body = _user_mail_text('pass_body', $variables);
  $headers = "From: $from\nReply-to: $from\nX-Mailer: Drupal\nReturn-path: $from\nErrors-to: $from";
  $mail_success = user_mail($account->mail, $subject, $body, $headers);

  if ($mail_success) {
    watchdog('user', t('Password reset instructions mailed to %name at %email.', array('%name' => '<em>'. $account->name .'</em>', '%email' => '<em>'. $account->mail .'</em>')));
    drupal_set_message(t('Further instructions have been sent to your e-mail address.'));
  }
  else {
    watchdog('user', t('Error mailing password reset instructions to %name at %email.', array('%name' => theme('placeholder', $account->name), '%email' => theme('placeholder', $account->mail))), WATCHDOG_ERROR);
    drupal_set_message(t('Unable to send mail. Please contact the site admin.'));
  }
  return 'user';
}

function theme_user_pass($form) {
  $output = '<p>'. t('Enter your username <strong><em>or</em></strong> your e-mail address.') .'</p>';
  $output .= form_render($form);
  return $output;
}

/**
 * Menu callback; process one time login link and redirects to the user page on success.
 */
function user_pass_reset($uid, $timestamp, $hashed_pass, $action = NULL) {
  global $user;

  // Check if the user is already logged in. The back button is often the culprit here.
  if ($user->uid) {
    drupal_set_message(t('You have already used this one-time login link. It is not necessary to use this link to login anymore. You are already logged in.'));
    drupal_goto(variable_get('site_frontpage', 'node'));
  }
  else {
    // Time out, in seconds, until login URL expires. 24 hours = 86400 seconds.
    $timeout = 86400;
    $current = time();
    // Some redundant checks for extra security ?
    if ($timestamp < $current && $account = user_load(array('uid' => $uid, 'status' => 1)) ) {
      // No time out for first time login.
      if ($account->login && $current - $timestamp > $timeout) {
        drupal_set_message(t('You have tried to use a one-time login link that has expired. Please request a new one using the form below.'));
        drupal_goto('user/password');
      }
      else if ($account->uid && $timestamp > $account->login && $timestamp < $current && $hashed_pass == user_pass_rehash($account->pass, $timestamp, $account->login)) {
        // First stage is a confirmation form, then login
        if ($action == 'login') {
          watchdog('user', t('User %name used one-time login link at time %timestamp.', array('%name' => "<em>$account->name</em>", '%timestamp' => $timestamp)));
          // Update the user table noting user has logged in.
          // And this also makes this hashed password a one-time-only login.
          db_query("UPDATE {users} SET login = %d WHERE uid = %d", time(), $account->uid);
          // Now we can set the new user.
          $user = $account;
          // And proceed with normal login, going to user page.
          user_module_invoke('login', $edit, $user);
          drupal_set_message(t('You have just used your one-time login link. It is no longer necessary to use this link to login. Please change your password.'));
          drupal_goto('user/'. $user->uid .'/edit');
        }
        else {
          $form['message'] = array('#value' => t('<p>This is a one-time login for %user_name and will expire on %expiration_date</p><p>Click on this button to login to the site and change your password.</p>', array('%user_name' => theme('placeholder',$account->name), '%expiration_date' => format_date($timestamp + $timeout))));
          $form['help'] = array('#value' => t('<p>This login can be used only once.</p>'));
          $form['submit'] = array('#type' => 'submit', '#value' => t('Log in'));
          $form['#action'] = url("user/reset/$uid/$timestamp/$hashed_pass/login");
          return drupal_get_form('user_pass_reset', $form);
        }
      }
      else {
        drupal_set_message(t('You have tried to use a one-time login link which has either been used or is no longer valid. Please request a new one using the form below.'));
        drupal_goto('user/password');
      }
    }
    else {
      // Deny access, no more clues.
      // Everything will be in the watchdog's URL for the administrator to check.
      drupal_access_denied();
    }
  }
}

function user_pass_reset_url($account) {
  $timestamp = time();
  return url("user/reset/$account->uid/$timestamp/".user_pass_rehash($account->pass, $timestamp, $account->login), NULL, NULL, TRUE);
}

function user_pass_rehash($password, $timestamp, $login) {
  return md5($timestamp . $password . $login);
}

function user_register() {
  global $user;

  $admin = user_access('administer users');

  // If we aren't admin but already logged on, go to the user page instead.
  if (!$admin && $user->uid) {
    drupal_goto('user/'. $user->uid);
  }

  // Display the registration form.
  if (!$admin) {
    $form['user_registration_help'] = array('#type' => 'markup', '#value' => variable_get('user_registration_help', ''));
  }
  $affiliates = user_auth_help_links();
  if (!$admin && count($affiliates) > 0) {
    $affiliates = implode(', ', $affiliates);
    $form['affiliates'] = array('#type' => 'markup', '#value' => '<p>'. t('Note: if you have an account with one of our affiliates (%s), you may <a href="%login_uri">login now</a> instead of registering.', array('%s' => $affiliates, '%login_uri' => url('user'))) .'</p>');
  }
  $form['name'] = array('#type' => 'textfield',
    '#title' => t('Username'),
    '#size' => 30,
    '#maxlength' => 60,
    '#description' => t('Your full name or your preferred username; only letters, numbers and spaces are allowed.'),
    '#required' => TRUE);
  $form['mail'] = array('#type' => 'textfield',
    '#title' => t('E-mail address'),
    '#size' => 30,
    '#maxlength' => 64,
    '#description' => t('A password and instructions will be sent to this e-mail address, so make sure it is accurate.'),
    '#required' => TRUE,
  );
  if ($admin) {
    $form['pass'] = array('#type' => 'password',
      '#title' => t('Password'),
      '#size' => 30,
      '#description' => t('Provide a password for the new account.'),
      '#required' => TRUE,
    );
    $form['notify'] = array(
     '#type' => 'checkbox', 
     '#title' => t('Notify user of new account')
    );
  }
  $extra = _user_forms($null, $null, $null, 'register');
  
  // Only display form_group around default fields if there are other groups.
  if ($extra) {
    $form['account'] = array('#type' => 'fieldset', '#title' => t('Account information'));
    $form['account']['name'] = $form['name'];
    $form['account']['mail'] = $form['mail'];
    $form['account']['pass'] = $form['pass'];
    $form['account']['notify'] = $form['notify'];
    unset($form['name'], $form['mail'], $form['pass'], $form['notify']);
    $form = array_merge($form, $extra);
  }
  $form['submit'] = array('#type' => 'submit', '#value' => t('Create new account'), '#weight' => 30);

  return drupal_get_form('user_register', $form);
}

function user_register_validate($form_id, $form_values) {
  user_module_invoke('validate', $form_values, $form_values, 'account');
}

function user_register_submit($form_id, $form_values) {
  global $base_url;

  $admin = user_access('administer users');

  $mail = $form_values['mail'];
  $name = $form_values['name'];
  $pass = $admin ? $form_values['pass'] : user_password();
  $notify = $form_values['notify'];
  $from = variable_get('site_mail', ini_get('sendmail_from'));

  if (!$admin && array_intersect(array_keys($form_values), array('uid', 'roles', 'init', 'session', 'status'))) {
    watchdog('security', t('Detected malicious attempt to alter protected user fields.'), WATCHDOG_WARNING);
    return 'user/register';
  }

  $account = user_save('', array_merge($form_values, array('pass' => $pass, 'init' => $mail, 'status' => ($admin || variable_get('user_register', 1) == 1))));
  watchdog('user', t('New user: %name %email.', array('%name' => theme('placeholder', $name), '%email' => theme('placeholder', '<'. $mail .'>'))), WATCHDOG_NOTICE, l(t('edit'), 'user/'. $account->uid .'/edit'));

  $variables = array('%username' => $name, '%site' => variable_get('site_name', 'drupal'), '%password' => $pass, '%uri' => $base_url, '%uri_brief' => substr($base_url, strlen('http://')), '%mailto' => $mail, '%date' => format_date(time()), '%login_uri' => url('user', NULL, NULL, TRUE), '%edit_uri' => url('user/'. $account->uid .'/edit', NULL, NULL, TRUE), '%login_url' => user_pass_reset_url($account));

  // The first user may login immediately, and receives a customized welcome e-mail.
  if ($account->uid == 1) {
    user_mail($mail, t('Drupal user account details for %s', array('%s' => $name)), strtr(t("%username,\n\nYou may now login to %uri using the following username and password:\n\n  username: %username\n  password: %password\n\n%edit_uri\n\n--drupal"), $variables), "From: $from\nReply-to: $from\nX-Mailer: Drupal\nReturn-path: $from\nErrors-to: $from");
    drupal_set_message(t('<p>Welcome to Drupal. You are user #1, which gives you full and immediate access.  All future registrants will receive their passwords via e-mail, so please make sure your website e-mail address is set properly under the general settings on the <a href="%settings">settings page</a>.</p><p> Your password is <strong>%pass</strong>. You may change your password below.</p>', array('%pass' => $pass, '%settings' => url('admin/settings'))));
    user_authenticate($account->name, trim($pass));

    // Set the installed schema version of the system module to the most recent version.
    include_once './includes/install.inc';
    drupal_set_installed_schema_version('system', max(drupal_get_schema_versions('system')));

    return 'user/1/edit';
  }
  else {
    if ($admin && !$notify) {
      drupal_set_message(t('Created a new user account. No e-mail has been sent.'));

      return 'admin/user';
    }
    else if ($account->status || $notify) {
      // Create new user account, no administrator approval required.
      $subject = $notify ? _user_mail_text('admin_subject', $variables) : _user_mail_text('welcome_subject', $variables);
      $body = $notify ? _user_mail_text('admin_body', $variables) : _user_mail_text('welcome_body', $variables);

      user_mail($mail, $subject, $body, "From: $from\nReply-to: $from\nX-Mailer: Drupal\nReturn-path: $from\nErrors-to: $from");
      
      if ($notify) {
        drupal_set_message(t('Password and further instructions have been e-mailed to the new user %user.', array('%user' => theme('placeholder', $name))));
        return 'admin/user';
      }
      else {
        drupal_set_message(t('Your password and further instructions have been sent to your e-mail address.'));
        return '';
      }
    }
    else {
      // Create new user account, administrator approval required.
      $subject = _user_mail_text('approval_subject', $variables);
      $body = _user_mail_text('approval_body', $variables);

      user_mail($mail, $subject, $body, "From: $from\nReply-to: $from\nX-Mailer: Drupal\nReturn-path: $from\nErrors-to: $from");
      user_mail(variable_get('site_mail', ini_get('sendmail_from')), $subject, t("%u has applied for an account.\n\n%uri", array('%u' => $account->name, '%uri' => url("user/$account->uid/edit", NULL, NULL, TRUE))), "From: $from\nReply-to: $from\nX-Mailer: Drupal\nReturn-path: $from\nErrors-to: $from");
      drupal_set_message(t('Thank you for applying for an account. Your account is currently pending approval by the site administrator.<br />In the meantime, your password and further instructions have been sent to your e-mail address.'));

    }
  }
}

function user_edit_form($uid, $edit) {
  // Account information:
  $form['account'] = array('#type' => 'fieldset',
    '#title' => t('Account information'),
  );
  if (user_access('change own username') || user_access('administer users')) {
    $form['account']['name'] = array('#type' => 'textfield',
      '#title' => t('Username'),
      '#default_value' => $edit['name'],
      '#maxlength' => 60,
      '#description' => t('Your full name or your preferred username: only letters, numbers and spaces are allowed.'),
      '#required' => TRUE,
    );
  }
  $form['account']['mail'] = array('#type' => 'textfield',
    '#title' => t('E-mail address'),
    '#default_value' => $edit['mail'],
    '#maxlength' => 64,
    '#description' => t('Insert a valid e-mail address. All e-mails from the system will be sent to this address. The e-mail address is not made public and will only be used if you wish to receive a new password or wish to receive certain news or notifications by e-mail.'),
    '#required' => TRUE,
  );
  $form['account']['pass'] = array('#type' => 'password_confirm',
    '#title' => t('Password'),
    '#description' => t('To change the current user password, enter the new password in both fields.'),
  );
  if (user_access('administer users')) {
    $form['account']['status'] = array('#type' => 'radios', '#title' => t('Status'), '#default_value' => $edit['status'], '#options' => array(t('Blocked'), t('Active')));
  }
  if (user_access('administer access control')) {
    $roles = user_roles(1);
    unset($roles[DRUPAL_AUTHENTICATED_RID]);
    if ($roles) {
      $form['account']['roles'] = array('#type' => 'checkboxes', '#title' => t('Roles'), '#default_value' => array_keys((array)$edit['roles']), '#options' => $roles, '#description' => t('The user receives the combined permissions of the %au role, and all roles selected here.', array('%au' => theme('placeholder', t('authenticated user')))));
    }
  }

  // Picture/avatar:
  if (variable_get('user_pictures', 0)) {
    $form['picture'] = array('#type' => 'fieldset', '#title' => t('Picture'), '#weight' => 1);
    $picture = theme('user_picture', (object)$edit);
    if ($picture) {
      $form['picture']['current_picture'] = array('#type' => 'markup', '#value' => $picture);
      $form['picture']['picture_delete'] = array('#type' => 'checkbox', '#title' => t('Delete picture'), '#description' => t('Check this box to delete your current picture.'));
    } else {
      $form['picture']['picture_delete'] = array('#type' => 'hidden');
    }
    $form['picture']['picture_upload'] = array('#type' => 'file', '#title' => t('Upload picture'), '#size' => 48, '#description' => t('Your virtual face or picture.  Maximum dimensions are %dimensions and the maximum size is %size kB.', array('%dimensions' => variable_get('user_picture_dimensions', '85x85'), '%size' => variable_get('user_picture_file_size', '30'))) .' '. variable_get('user_picture_guidelines', ''));
  }

  return $form;
}

function _user_edit_validate($uid, &$edit) {
  $user = user_load(array('uid' => $uid));
  // Validate the username:
  if (user_access('change own username') || user_access('administer users') || arg(1) == 'register') {
    if ($error = user_validate_name($edit['name'])) {
      form_set_error('name', $error);
    }
    else if (db_num_rows(db_query("SELECT uid FROM {users} WHERE uid != %d AND LOWER(name) = LOWER('%s')", $uid, $edit['name'])) > 0) {
      form_set_error('name', t('The name %name is already taken.', array('%name' => theme('placeholder', $edit['name']))));
    }
    else if (drupal_is_denied('user', $edit['name'])) {
      form_set_error('name', t('The name %name has been denied access.', array('%name' => theme('placeholder', $edit['name']))));
    }
  }

  // Validate the e-mail address:
  if ($error = user_validate_mail($edit['mail'])) {
    form_set_error('mail', $error);
  }
  else if (db_num_rows(db_query("SELECT uid FROM {users} WHERE uid != %d AND LOWER(mail) = LOWER('%s')", $uid, $edit['mail'])) > 0) {
    form_set_error('mail', t('The e-mail address %email is already taken.', array('%email' => theme('placeholder', $edit['mail']))));
  }
  else if (drupal_is_denied('mail', $edit['mail'])) {
    form_set_error('mail', t('The e-mail address %email has been denied access.', array('%email' => theme('placeholder', $edit['mail']))));
  }

  // If required, validate the uploaded picture.
  if ($file = file_check_upload('picture_upload')) {
    user_validate_picture($file, $edit, $user);
  }
}

function _user_edit_submit($uid, &$edit) {
  $user = user_load(array('uid' => $uid));
  // Delete picture if requested, and if no replacement picture was given.
  if ($edit['picture_delete']) {
    if ($user->picture && file_exists($user->picture)) {
      file_delete($user->picture);
    }
    $edit['picture'] = '';
  }
  if (isset($edit['roles'])) {
    $edit['roles'] = array_filter($edit['roles']);
  }
}

function user_edit($category = 'account') {
  global $user;

  $account = user_load(array('uid' => arg(1)));
  $edit = $_POST['op'] ? $_POST['edit'] : (array)$account;

  if (arg(2) == 'delete') {
    if ($edit['confirm']) {
      db_query('DELETE FROM {users} WHERE uid = %d', $account->uid);
      db_query('DELETE FROM {sessions} WHERE uid = %d', $account->uid);
      db_query('DELETE FROM {users_roles} WHERE uid = %d', $account->uid);
      db_query('DELETE FROM {authmap} WHERE uid = %d', $account->uid);
      watchdog('user', t('Deleted user: %name %email.', array('%name' => theme('placeholder', $account->name), '%email' => theme('placeholder', '<'. $account->mail .'>'))), WATCHDOG_NOTICE);
      drupal_set_message(t('The account has been deleted.'));
      module_invoke_all('user', 'delete', $edit, $account);
      drupal_goto('admin/user');
    }
    else {
      return confirm_form('user_confirm_delete', array(), t('Are you sure you want to delete the account %name?', array('%name' => theme('placeholder', $account->name))), 'user/'. $account->uid, t('All submissions made by this user will be attributed to the anonymous account. This action cannot be undone.'), t('Delete'), t('Cancel'));
    }
  }
  else if ($_POST['op'] == t('Delete')) {
    if ($_REQUEST['destination']) {
      $destination = drupal_get_destination();
      unset($_REQUEST['destination']);
    }
    // Note: we redirect from user/uid/edit to user/uid/delete to make the tabs disappear.
    drupal_goto("user/$account->uid/delete", $destination);
  }

  $form = _user_forms($edit, $account, $category);
  $form['_category'] = array('#type' => 'value', '#value' => $category);
  $form['_account'] = array('#type' => 'value', '#value' => $account);
  $form['submit'] = array('#type' => 'submit', '#value' => t('Submit'), '#weight' => 30);
  if (user_access('administer users')) {
    $form['delete'] = array('#type' => 'submit', '#value' => t('Delete'), '#weight' => 31);
  }
  $form['#attributes'] = array('enctype' => 'multipart/form-data');

  drupal_set_title($account->name);
  return drupal_get_form('user_edit', $form);
}

function user_edit_validate($form_id, $form_values) {
  user_module_invoke('validate', $form_values, $form_values['_account'], $form_values['_category']);
  // Validate input to ensure that non-privileged users can't alter protected data.
  if ((!user_access('administer users') && array_intersect(array_keys($form_values), array('uid', 'init', 'session'))) || (!user_access('administer access control') && isset($form_values['roles']))) {
    $message = t('Detected malicious attempt to alter protected user fields.');
    watchdog('security', $message, WATCHDOG_WARNING);
    // set this to a value type field
    form_set_error('category', $message);
  }
}

function user_edit_submit($form_id, $form_values) {
  $account = $form_values['_account'];
  $category = $form_values['_category'];
  unset($form_values['_account'], $form_values['submit'], $form_values['delete'], $form_values['form_id'], $form_values['_category']);
  user_module_invoke('submit', $form_values, $account, $category);
  user_save($account, $form_values, $category);
  // Delete that user's menu cache.
  cache_clear_all('menu:'. $account->uid, TRUE);
  drupal_set_message(t('The changes have been saved.'));
  return 'user/'. $account->uid;
}

function user_view($uid = 0) {
  global $user;

  $account = user_load(array('uid' => $uid));
  if ($account === FALSE) {
    return drupal_not_found();
  }
  // Retrieve and merge all profile fields:
  $fields = array();
  foreach (module_list() as $module) {
    if ($data = module_invoke($module, 'user', 'view', '', $account)) {
      foreach ($data as $category => $items) {
        foreach ($items as $item) {
          $item['class'] = "$module-". $item['class'];
          $fields[$category][] = $item;
        }
      }
    }
  }
  drupal_set_title($account->name);
  return theme('user_profile', $account, $fields);
}

/*** Administrative features ***********************************************/

function _user_mail_text($messageid, $variables = array()) {

  // Check if an admin setting overrides the default string.
  if ($admin_setting = variable_get('user_mail_' . $messageid, FALSE)) {
    return strtr($admin_setting, $variables);
  }
  // No override, return with default strings.
  else {
    switch ($messageid) {
      case 'welcome_subject':
        return t('Account details for %username at %site', $variables);
      case 'welcome_body':
        return t("%username,\n\nThank you for registering at %site. You may now log in to %login_uri using the following username and password:\n\nusername: %username\npassword: %password\n\nYou may also log in by clicking on this link or copying and pasting it in your browser:\n\n%login_url\n\nThis is a one-time login, so it can be used only once.\n\nAfter logging in, you will be redirected to %edit_uri so you can change your password.\n\nYour new %site membership also enables to you to login to other Drupal powered websites (e.g. http://drupal.org/) without registering. Just use the following Drupal ID and password:\n\nDrupal ID: %username@%uri_brief\npassword: %password\n\n\n--  %site team", $variables);
      case 'admin_subject':
        return t('An administrator created an account for you at %site', $variables);
      case 'admin_body':
        return t("%username,\n\nA site administrator at %site has created an account for you. You may now log in to %login_uri using the following username and password:\n\nusername: %username\npassword: %password\n\nYou may also log in by clicking on this link or copying and pasting it in your browser:\n\n%login_url\n\nThis is a one-time login, so it can be used only once.\n\nAfter logging in, you will be redirected to %edit_uri so you can change your password.\n\nYour new %site membership also enables to you to login to other Drupal powered websites (e.g. http://www.drupal.org/) without registering. Just use the following Drupal ID and password:\n\nDrupal ID: %username@%uri_brief\npassword: %password\n\n\n--  %site team", $variables);  
      case 'approval_subject':
        return t('Account details for %username at %site (pending admin approval)', $variables);
      case 'approval_body':
        return t("%username,\n\nThank you for registering at %site. Your application for an account is currently pending approval. Once it has been granted, you may log in to %login_uri using the following username and password:\n\nusername: %username\npassword: %password\n\nYou may also log in by clicking on this link or copying and pasting it in your browser:\n\n%login_url\n\nThis is a one-time login, so it can be used only once.\n\nAfter logging in, you may wish to change your password at %edit_uri\n\nYour new %site membership also enables to you to login to other Drupal powered websites (e.g. http://www.drop.org/) without registering. Just use the following Drupal ID and password:\n\nDrupal ID: %username@%uri_brief\npassword: %password\n\n\n--  %site team", $variables);
      case 'pass_subject':
        return t('Replacement login information for %username at %site', $variables);
      case 'pass_body':
        return t("%username,\n\nA request to reset the password for your account has been made at %site.\n\nYou may now log in to %uri_brief clicking on this link or copying and pasting it in your browser:\n\n%login_url\n\nThis is a one-time login, so it can be used only once. It expires after one day and nothing will happen if it's not used.\n\nAfter logging in, you will be redirected to %edit_uri so you can change your password.", $variables);
    }
  }
}

function user_configure_settings() {
}

/**
 * Menu callback: check an access rule
 */
function user_admin_access_check() {
  $form['user'] = array('#type' => 'fieldset', '#title' => t('Username'));
  $form['user']['test'] = array('#type' => 'textfield', '#title' => '', '#description' => t('Enter a username to check if it will be denied or allowed.'), '#size' => 30, '#maxlength' => 64);
  $form['user']['type'] = array('#type' => 'hidden', '#value' => 'user');
  $form['user']['submit'] = array('#type' => 'submit', '#value' => t('Check username'));
  $output .= drupal_get_form('check_user', $form, 'user_admin_access_check');
  unset($form); // prevent endless loop?

  $form['mail'] = array('#type' => 'fieldset', '#title' => t('E-mail'));
  $form['mail']['test'] = array('#type' => 'textfield', '#title' => '', '#description' => t('Enter an e-mail address to check if it will be denied or allowed.'), '#size' => 30, '#maxlength' => 64);
  $form['mail']['type'] = array('#type' => 'hidden', '#value' => 'mail');
  $form['mail']['submit'] = array('#type' => 'submit', '#value' => t('Check e-mail'));
  $output .= drupal_get_form('check_mail', $form, 'user_admin_access_check');
  unset($form); // prevent endless loop?

  $form['host'] = array('#type' => 'fieldset', '#title' => t('Hostname'));
  $form['host']['test'] = array('#type' => 'textfield', '#title' => '', '#description' => t('Enter a hostname or IP address to check if it will be denied or allowed.'), '#size' => 30, '#maxlength' => 64);
  $form['host']['type'] = array('#type' => 'hidden', '#value' => 'host');
  $form['host']['submit'] = array('#type' => 'submit', '#value' => t('Check hostname'));
  $output .= drupal_get_form('check_host', $form, 'user_admin_access_check');
  unset($form); // prevent endless loop?

  return $output;
}

function user_admin_access_check_validate($form_id, $edit) {
  if (empty($edit['test'])) {
    form_set_error($edit['type'], t('No value entered. Please enter a test string and try again.'));
  }
}

function user_admin_access_check_submit($form_id, $edit) {
  switch ($edit['type']) {
    case 'user':
      if (drupal_is_denied('user', $edit['test'])) {
        drupal_set_message(t('The username %name is not allowed.', array('%name' => theme('placeholder', $edit['test']))));
      }
      else {
        drupal_set_message(t('The username %name is allowed.', array('%name' => theme('placeholder', $edit['test']))));
      }
      break;
    case 'mail':
      if (drupal_is_denied('mail', $edit['test'])) {
        drupal_set_message(t('The e-mail address %mail is not allowed.', array('%mail' => theme('placeholder', $edit['test']))));
      }
      else {
        drupal_set_message(t('The e-mail address %mail is allowed.', array('%mail' => theme('placeholder', $edit['test']))));
      }
      break;
    case 'host':
      if (drupal_is_denied('host', $edit['test'])) {
        drupal_set_message(t('The hostname %host is not allowed.', array('%host' => theme('placeholder', $edit['test']))));
      }
      else {
        drupal_set_message(t('The hostname %host is allowed.', array('%host' => theme('placeholder', $edit['test']))));
      }
      break;
    default:
      break;
  }
}

/**
 * Menu callback: add an access rule
 */
function user_admin_access_add($mask = NULL, $type = NULL) {
  if ($edit = $_POST['edit']) {
    if (!$edit['mask']) {
      form_set_error('mask', t('You must enter a mask.'));
    }
    else {
      $aid = db_next_id('{access}_aid');
      db_query("INSERT INTO {access} (aid, mask, type, status) VALUES ('%s', '%s', '%s', %d)", $aid, $edit['mask'], $edit['type'], $edit['status']);
      drupal_set_message(t('The access rule has been added.'));
      drupal_goto('admin/access/rules');
    }
  }
  else {
    $edit['mask'] = $mask;
    $edit['type'] = $type;
  }

  $form = _user_admin_access_form($edit);
  $form['submit'] = array('#type' => 'submit', '#value' => t('Add rule'));

  return drupal_get_form('access_rule', $form);
}

/**
 * Menu callback: delete an access rule
 */
function user_admin_access_delete($aid = 0) {
  $access_types = array('user' => t('username'), 'mail' => t('e-mail'));
  $edit = db_fetch_object(db_query('SELECT aid, type, status, mask FROM {access} WHERE aid = %d', $aid));

  $form = array();
  $form['aid'] = array('#type' => 'hidden', '#value' => $aid);
  $output = confirm_form('user_admin_access_delete_confirm', $form,
                  t('Are you sure you want to delete the %type rule for %rule?', array('%type' => $access_types[$edit->type], '%rule' => theme('placeholder', $edit->mask))),
                  'admin/access/rules',
                  t('This action cannot be undone.'),
                  t('Delete'),
                  t('Cancel'));
  return $output;
}

function user_admin_access_delete_confirm_submit($form_id, $edit) {
  db_query('DELETE FROM {access} WHERE aid = %d', $edit['aid']);
  drupal_set_message(t('The access rule has been deleted.'));
  return 'admin/access/rules';
}

/**
 * Menu callback: edit an access rule
 */
function user_admin_access_edit($aid = 0) {
  if ($edit = $_POST['edit']) {
    if (!$edit['mask']) {
      form_set_error('mask', t('You must enter a mask.'));
    }
    else {
      db_query("UPDATE {access} SET mask = '%s', type = '%s', status = '%s' WHERE aid = %d", $edit['mask'], $edit['type'], $edit['status'], $aid);
      drupal_set_message(t('The access rule has been saved.'));
      drupal_goto('admin/access/rules');
    }
  }
  else {
    $edit = db_fetch_array(db_query('SELECT aid, type, status, mask FROM {access} WHERE aid = %d', $aid));
  }
  $form = _user_admin_access_form($edit);
  $form['submit'] = array('#type' => 'submit', '#value' => t('Save rule'));

  return drupal_get_form('access_rule', $form);
}

function _user_admin_access_form($edit) {
  $form['status'] = array(
    '#type' => 'radios',
    '#title' => t('Access type'),
    '#default_value' => 0,
    '#options' => array('1' => t('Allow'), '0' => t('Deny')),
  );
  $type_options = array('user' => t('Username'), 'mail' => t('E-mail'), 'host' => t('Host'));
  $form['type'] = array(
    '#type' => 'radios',
    '#title' => t('Rule type'),
    '#default_value' => (isset($type_options[$edit['type']]) ? $edit['type'] : 'user'),
    '#options' => $type_options,
  );
  $form['mask'] = array(
    '#type' => 'textfield',
    '#title' => t('Mask'),
    '#size' => 30,
    '#maxlength' => 64,
    '#default_value' => $edit['mask'],
    '#description' => '%: '. t('Matches any number of characters, even zero characters') .'.<br />_: '. t('Matches exactly one character.'),
    '#required' => TRUE,
  );
  return $form;
}

/**
 * Menu callback: list all access rules
 */
function user_admin_access() {
  $header = array(array('data' => t('Access type'), 'field' => 'status'), array('data' => t('Rule type'), 'field' => 'type'), array('data' =>t('Mask'), 'field' => 'mask'), array('data' => t('Operations'), 'colspan' => 2));
  $result = db_query("SELECT aid, type, status, mask FROM {access}". tablesort_sql($header));
  $access_types = array('user' => t('username'), 'mail' => t('e-mail'), 'host' => t('host'));
  $rows = array();
  while ($rule = db_fetch_object($result)) {
    $rows[] = array($rule->status ? t('allow') : t('deny'), $access_types[$rule->type], $rule->mask, l(t('edit'), 'admin/access/rules/edit/'. $rule->aid), l(t('delete'), 'admin/access/rules/delete/'. $rule->aid));
  }
  if (count($rows) == 0) {
    $rows[] = array(array('data' => '<em>'. t('There are currently no access rules.') .'</em>', 'colspan' => 5));
  }
  $output .= theme('table', $header, $rows);

  return $output;
}

function user_roles($membersonly = 0, $permission = 0) {
  $roles = array();

  if ($permission) {
    $result = db_query("SELECT r.* FROM {role} r INNER JOIN {permission} p ON r.rid = p.rid WHERE p.perm LIKE '%%%s%%' ORDER BY r.name", $permission);
  }
  else {
    $result = db_query('SELECT * FROM {role} ORDER BY name');
  }
  while ($role = db_fetch_object($result)) {
    if (!$membersonly || ($membersonly && $role->rid != DRUPAL_ANONYMOUS_RID)) {
      $roles[$role->rid] = $role->name;
    }
  }
  return $roles;
}

/**
 * Menu callback: administer permissions.
 */
function user_admin_perm($str_rids = NULL) {
  if (preg_match('/^([0-9]+[+ ])*[0-9]+$/', $str_rids)) {
    // The '+' character in a query string may be parsed as ' '.
    $rids = preg_split('/[+ ]/', $str_rids);
  }

  if($rids) {
    $breadcrumbs = drupal_get_breadcrumb();
    $breadcrumbs[] = l(t('all roles'), 'admin/access');
    drupal_set_breadcrumb($breadcrumbs);
    $result = db_query('SELECT r.rid, p.perm FROM {role} r LEFT JOIN {permission} p ON r.rid = p.rid WHERE r.rid IN (%s) ORDER BY name', implode(', ', $rids));
  }
  else {
    $result = db_query('SELECT r.rid, p.perm FROM {role} r LEFT JOIN {permission} p ON r.rid = p.rid ORDER BY name');
  }

  // Compile role array:
  $roles = array();
  while ($role = db_fetch_object($result)) {
    $role_permissions[$role->rid] = $role->perm;
  }

  if($rids) {
    $result = db_query('SELECT rid, name FROM {role} r WHERE r.rid IN (%s) ORDER BY name', implode(', ', $rids));
  }
  else {
    $result = db_query('SELECT rid, name FROM {role} ORDER BY name');
  }
  $role_names = array();
  while ($role = db_fetch_object($result)) {
    $role_names[$role->rid] = $role->name;
  }

  // Render role/permission overview:
  $options = array();
  foreach (module_list(FALSE, FALSE, TRUE) as $module) {
    if ($permissions = module_invoke($module, 'perm')) {
      $form['permission'][] = array('#type' => 'markup', '#value' => t('%module module', array('%module' => $module)));
      asort($permissions);
      foreach ($permissions as $perm) {
        $options[$perm] = '';
        $form['permission'][$perm] = array('#type' => 'markup', '#value' => t($perm));
        foreach ($role_names as $rid => $name) {
          // Builds arrays for checked boxes for each role
          if (strstr($role_permissions[$rid], $perm)) {
            $status[$rid][] = $perm;
          }
        }
      }
    }
  }
  // Have to build checkboxes here after checkbox arrays are built
  foreach ($role_names as $rid => $name) {
    $form['checkboxes'][$rid] = array('#type' => 'checkboxes', '#options' => $options, '#default_value' => $status[$rid]);
    $form['role_names'][$rid] = array('#type' => 'markup', '#value' => l($name, 'admin/access/'. $rid), '#tree' => TRUE);
  }
  $form['submit'] = array('#type' => 'submit', '#value' => t('Save permissions'));

  return drupal_get_form('user_admin_perm', $form);
}

function theme_user_admin_perm($form) {
  foreach (element_children($form['permission']) as $key) {
    // Don't take form control structures
    if (is_array($form['permission'][$key])) {
      $row = array();
      // Module name
      if (is_numeric($key)) {
        $row[] = array('data' => form_render($form['permission'][$key]), 'class' => 'module', 'colspan' => count($form['role_names']) + 1);
      // Permissions
      }
      else {
        $row[] = array('data' => form_render($form['permission'][$key]), 'class' => 'permission');
        foreach (element_children($form['checkboxes']) as $rid) {
          if (is_array($form['checkboxes'][$rid])) {
            $row[] = array('data' => form_render($form['checkboxes'][$rid][$key]), 'align' => 'center', 'title' => t($key));
          }
        }
      }
      $rows[] = $row;
    }
  }
  $header[] = (t('Permission'));
  foreach (element_children($form['role_names']) as $rid) {
    if (is_array($form['role_names'][$rid])) {
      $header[] = form_render($form['role_names'][$rid]);
    }
  }
  $output = theme('table', $header, $rows, array('id' => 'permissions'));
  $output .= form_render($form);
  return $output;
}

function user_admin_perm_submit($form_id, $edit) {
  // Save permissions:
  $result = db_query('SELECT * FROM {role}');
  while ($role = db_fetch_object($result)) {
    if(isset($edit[$role->rid])) {
      // Delete, so if we clear every checkbox we reset that role;
      // otherwise permissions are active and denied everywhere.
      db_query('DELETE FROM {permission} WHERE rid = %d', $role->rid);
      foreach ($edit[$role->rid] as $key => $value) {
        if (!$value) {
          unset($edit[$role->rid][$key]);
        }
      }
      if (count($edit[$role->rid])) {
        db_query("INSERT INTO {permission} (rid, perm) VALUES (%d, '%s')", $role->rid, implode(', ', array_keys($edit[$role->rid])));
      }
    }
  }

  drupal_set_message(t('The changes have been saved.'));

  // Clear the cached pages and menus:
  menu_rebuild();

}

/**
 * Menu callback: administer roles.
 */
function user_admin_role() {
  $edit = isset($_POST['edit']) ? $_POST['edit'] : '';
  $op = isset($_POST['op']) ? $_POST['op'] : '';
  $id = arg(4);

  if ($op == t('Save role')) {
    if ($edit['name']) {
      db_query("UPDATE {role} SET name = '%s' WHERE rid = %d", $edit['name'], $id);
      drupal_set_message(t('The changes have been saved.'));
      drupal_goto('admin/access/roles');
    }
    else {
      form_set_error('name', t('You must specify a valid role name.'));
    }
  }
  else if ($op == t('Delete role')) {
    db_query('DELETE FROM {role} WHERE rid = %d', $id);
    db_query('DELETE FROM {permission} WHERE rid = %d', $id);

    // Update the users who have this role set:
    $result = db_query('SELECT DISTINCT(ur1.uid) FROM {users_roles} ur1 LEFT JOIN {users_roles} ur2 ON ur2.uid = ur1.uid WHERE ur1.rid = %d AND ur2.rid != ur1.rid', $id);
    $uid = array();

    while ($u = db_fetch_object($result)) {
      $uid[] = $u->uid;
    }

    if ($uid) {
      db_query('DELETE FROM {users_roles} WHERE rid = %d AND uid IN (%s)', $id, implode(', ', $uid));
    }

    drupal_set_message(t('The role has been deleted.'));
    drupal_goto('admin/access/roles');
  }
  else if ($op == t('Add role')) {
    if ($edit['name']) {
      db_query("INSERT INTO {role} (name) VALUES ('%s')", $edit['name']);
      drupal_set_message(t('The role has been added.'));
      drupal_goto('admin/access/roles');
    }
    else {
      form_set_error('name', t('You must specify a valid role name.'));
    }
  }
  else if ($id) {
    // Display the role form.
    $role = db_fetch_object(db_query('SELECT * FROM {role} WHERE rid = %d', $id));
    $form['name'] = array('#type' => 'textfield', '#title' => t('Role name'), '#default_value' => $role->name, '#size' => 30, '#maxlength' => 64, '#description' => t('The name for this role. Example: "moderator", "editorial board", "site architect".'));
    $form['submit'] = array('#type' => 'submit', '#value' => t('Save role'));
    $form['delete'] = array('#type' => 'submit', '#value' => t('Delete role'));
    return drupal_get_form('user_admin_role', $form);
  }
  $form['name'] = array('#type' => 'textfield', '#size' => 32, '#maxlength' => 64);
  $form['submit'] = array('#type' => 'submit', '#value' => t('Add role'));
  return drupal_get_form('user_admin_new_role', $form);
}

function theme_user_admin_new_role($form) {
  $header = array(t('Name'), t('Operations'));
  foreach (user_roles() as $rid => $name) {
    if (!in_array($rid, array(DRUPAL_ANONYMOUS_RID, DRUPAL_AUTHENTICATED_RID))) {
      $rows[] = array($name, l(t('edit'), 'admin/access/roles/edit/'. $rid));
    }
    else {
      $rows[] = array($name, '<span class="disabled">'. t('locked') .'</span>');
    }
  }
  $rows[] = array(form_render($form['name']), form_render($form['submit']));

  return theme('table', $header, $rows);
}

function user_admin_account() {
  $header = array(
    array('data' => t('Username'), 'field' => 'u.name'),
    array('data' => t('Status'), 'field' => 'u.status'),
    array('data' => t('Member for'), 'field' => 'u.created', 'sort' => 'desc'),
    array('data' => t('Last access'), 'field' => 'u.access'),
    t('Operations')
  );
  $sql = 'SELECT u.uid, u.name, u.status, u.created, u.access FROM {users} u WHERE uid != 0';
  $sql .= tablesort_sql($header);
  $result = pager_query($sql, 50);

  $status = array(t('blocked'), t('active'));
  while ($account = db_fetch_object($result)) {
    $rows[] = array(theme('username', $account),
                    $status[$account->status],
                    format_interval(time() - $account->created),
                    $account->access ? t('%time ago', array('%time' => format_interval(time() - $account->access))) : t('never'),
                    l(t('edit'), "user/$account->uid/edit", array()));
  }

  $output = theme('table', $header, $rows);
  $output .= theme('pager', NULL, 50, 0, tablesort_pager());
  return $output;
}

function user_configure() {
  // User registration settings.
  $form['registration'] = array('#type' => 'fieldset', '#title' => t('User registration settings'));
  $form['registration']['user_register'] = array('#type' => 'radios', '#title' => t('Public registrations'), '#default_value' => variable_get('user_register', 1), '#options' => array(t('Only site administrators can create new user accounts.'), t('Visitors can create accounts and no administrator approval is required.'), t('Visitors can create accounts but administrator approval is required.')));
  $form['registration']['user_registration_help'] = array('#type' => 'textarea', '#title' => t('User registration guidelines'), '#default_value' => variable_get('user_registration_help', ''), '#description' => t('This text is displayed at the top of the user registration form.  It\'s useful for helping or instructing your users.'));

  // User e-mail settings.
  $form['email'] = array('#type' => 'fieldset', '#title' => t('User e-mail settings'));
  $form['email']['user_mail_welcome_subject'] = array('#type' => 'textfield', '#title' => t('Subject of welcome e-mail'), '#default_value' => _user_mail_text('welcome_subject'), '#maxlength' => 180, '#description' => t('Customize the subject of your welcome e-mail, which is sent to new members upon registering.') .' '. t('Available variables are:') .' %username, %site, %password, %uri, %uri_brief, %mailto, %date, %login_uri, %edit_uri, %login_url.');
  $form['email']['user_mail_welcome_body'] = array('#type' => 'textarea', '#title' => t('Body of welcome e-mail'), '#default_value' => _user_mail_text('welcome_body'), '#rows' => 15, '#description' => t('Customize the body of the welcome e-mail, which is sent to new members upon registering.') .' '. t('Available variables are:') .' %username, %site, %password, %uri, %uri_brief, %mailto, %login_uri, %edit_uri, %login_url.');
  $form['email']['user_mail_admin_subject'] = array('#type' => 'textfield', '#title' => t('Subject of welcome e-mail (user created by administrator)'), '#default_value' => _user_mail_text('admin_subject'), '#maxlength' => 180, '#description' => t('Customize the subject of your welcome e-mail, which is sent to new member accounts created by an administrator.') .' '. t('Available variables are:') .' %username, %site, %password, %uri, %uri_brief, %mailto, %date, %login_uri, %edit_uri, %login_url.');
  $form['email']['user_mail_admin_body'] = array('#type' => 'textarea', '#title' => t('Body of welcome e-mail (user created by administrator)'), '#default_value' => _user_mail_text('admin_body'), '#rows' => 15, '#description' => t('Customize the body of the welcome e-mail, which is sent to new member accounts created by an administrator.') .' '. t('Available variables are:') .' %username, %site, %password, %uri, %uri_brief, %mailto, %login_uri, %edit_uri, %login_url.');
  $form['email']['user_mail_approval_subject'] = array('#type' => 'textfield', '#title' => t('Subject of welcome e-mail (awaiting admin approval)'), '#default_value' => _user_mail_text('approval_subject'), '#maxlength' => 180, '#description' => t('Customize the subject of your awaiting approval welcome e-mail, which is sent to new members upon registering.') .' '. t('Available variables are:') .' %username, %site, %password, %uri, %uri_brief, %mailto, %date, %login_uri, %edit_uri, %login_url.');
  $form['email']['user_mail_approval_body'] = array('#type' => 'textarea', '#title' => t('Body of welcome e-mail (awaiting admin approval)'), '#default_value' => _user_mail_text('approval_body'), '#rows' => 15, '#description' => t('Customize the body of the awaiting approval welcome e-mail, which is sent to new members upon registering.') .' '. t('Available variables are:') .' %username, %site, %password, %uri, %uri_brief, %mailto, %login_uri, %edit_uri, %login_url.');
  $form['email']['user_mail_pass_subject'] = array('#type' => 'textfield', '#title' => t('Subject of password recovery e-mail'), '#default_value' => _user_mail_text('pass_subject'), '#maxlength' => 180, '#description' => t('Customize the Subject of your forgotten password e-mail.') .' '. t('Available variables are:') .' %username, %site, %login_url, %uri, %uri_brief, %mailto, %date, %login_uri, %edit_uri.');
  $form['email']['user_mail_pass_body'] = array('#type' => 'textarea', '#title' => t('Body of password recovery e-mail'), '#default_value' => _user_mail_text('pass_body'), '#rows' => 15, '#description' => t('Customize the body of the forgotten password e-mail.') .' '. t('Available variables are:') .' %username, %site, %login_url, %uri, %uri_brief, %mailto, %login_uri, %edit_uri.');

  // If picture support is enabled, check whether the picture directory exists:
  if (variable_get('user_pictures', 0)) {
    $picture_path = file_create_path(variable_get('user_picture_path', 'pictures'));
    file_check_directory($picture_path, 1, 'user_picture_path');
  }

  $form['pictures'] = array('#type' => 'fieldset', '#title' => t('Pictures'));
  $form['pictures']['user_pictures'] = array('#type' => 'radios', '#title' => t('Picture support'), '#default_value' => variable_get('user_pictures', 0), '#options' => array(t('Disabled'), t('Enabled')), '#description' => t('Enable picture support.'));
  $form['pictures']['user_picture_path'] = array('#type' => 'textfield', '#title' => t('Picture image path'), '#default_value' => variable_get('user_picture_path', 'pictures'), '#size' => 30, '#maxlength' => 255, '#description' => t('Subdirectory in the directory "%dir" where pictures will be stored.', array('%dir' => file_directory_path() .'/')));
  $form['pictures']['user_picture_default'] = array('#type' => 'textfield', '#title' => t('Default picture'), '#default_value' => variable_get('user_picture_default', ''), '#size' => 30, '#maxlength' => 255, '#description' => t('URL of picture to display for users with no custom picture selected. Leave blank for none.'));
  $form['pictures']['user_picture_dimensions'] = array('#type' => 'textfield', '#title' => t('Picture maximum dimensions'), '#default_value' => variable_get('user_picture_dimensions', '85x85'), '#size' => 15, '#maxlength' => 10, '#description' => t('Maximum dimensions for pictures.'));
  $form['pictures']['user_picture_file_size'] = array('#type' => 'textfield', '#title' => t('Picture maximum file size'), '#default_value' => variable_get('user_picture_file_size', '30'), '#size' => 15, '#maxlength' => 10, '#description' => t('Maximum file size for pictures, in kB.'));
  $form['pictures']['user_picture_guidelines'] = array('#type' => 'textarea', '#title' => t('Picture guidelines'), '#default_value' => variable_get('user_picture_guidelines', ''), '#description' => t('This text is displayed at the picture upload form in addition to the default guidelines.  It\'s useful for helping or instructing your users.'));

  return system_settings_form('user_configure_settings', $form);
}

function user_admin() {
  $edit = isset($_POST['edit']) ? $_POST['edit'] : '';
  $op = isset($_POST['op']) ? $_POST['op'] : '';

  if (empty($op)) {
    $op = arg(2);
  }

  switch ($op) {
    case 'search':
    case t('Search'):
      $output = search_form(url('admin/user/search'), $_POST['edit']['keys'], 'user') . search_data($_POST['edit']['keys'], 'user');
      break;
    case t('Create new account'):
    case 'create':
      $output = user_register();
      break;
    default:
      $output = user_admin_account();
  }
  return $output;
}

/**
 * Implementation of hook_help().
 */
function user_help($section) {
  global $user;

  switch ($section) {
    case 'admin/help#user':
      $output = '<p>'. t('The user module allows users to register, login, and logout. Users benefit from being able to sign on because it associates content they create with their account and allows various permissions to be set for their roles.  The user module supports user roles which can setup fine grained permissions allowing each role to do only what the administrator wants them to. Each user is assigned to one or more roles. By default there are two roles <em>anonymous</em> - a user who has not logged in, and <em>authenticated</em> a user who has signed up and who has been authorized. ') .'</p>';
      $output .= '<p>'. t('Users can use their own name or handle and can fine tune some personal configuration settings through their individual my account page.  Registered users need to authenticate by supplying either a local username and password, or a remote username and password such as DelphiForums ID, or one from a Drupal powered website.  A visitor accessing your website is assigned an unique ID, the so-called session ID, which is stored in a cookie. For security\'s sake, the cookie does not contain personal information but acts as a key to retrieve the information stored on your server. ') .'</p>';
      $output .= t('<p>You can</p>
<ul>
<li>view your <a href="%user">user page</a>.</li>
<li>administer users at <a href="%admin-user">administer &gt;&gt; user</a>.</li>
<li>allow users who have the "select different theme" permission to select themes from their user account by enabling themes in <a href="%admin-themes">administer &gt;&gt; themes</a>.</li>
<li>read user profile help at <a href="%admin-help-profile">administer &gt;&gt; help &gt;&gt; profile</a>.</li>
<li>read about distributed authentication in the system module help at <a href="%admin-help-system">administer &gt;&gt; help &gt;&gt; system</a>.</li>
</ul>
', array('%user' => url('user'), '%admin-user' => url('admin/user'), '%admin-themes' => url('admin/themes'), '%admin-help-profile' => url('admin/help/profile'), '%admin-help-system' => url('admin/help/system')));
      $output .= '<p>'. t('For more information please read the configuration and customization handbook <a href="%user">User page</a>.', array('%user' => 'http://drupal.org/handbook/modules/user/')) .'</p>';
      return $output;
    case 'admin/modules#description':
      return t('Manages the user registration and login system.');
    case 'admin/user':
      return t('<p>Drupal allows users to register, login, logout, maintain user profiles, etc. No participant can use his own name to post content until he signs up for a user account.</p>');
    case 'admin/user/create':
    case 'admin/user/account/create':
      return t('<p>This web page allows the administrators to register a new users by hand. Note that you cannot have a user where either the e-mail address or the username match another user in the system.</p>');
    case strstr($section, 'admin/access/rules'):
      return t('<p>Set up username and e-mail address access rules for new <em>and</em> existing accounts (currently logged in accounts will not be logged out). If a username or e-mail address for an account matches any deny rule, but not an allow rule, then the account will not be allowed to be created or to log in. A host rule is effective for every page view, not just registrations.</p>');
    case 'admin/access':
      return t('<p>Permissions let you control what users can do on your site.  Each user role (defined on the <a href="%role">user roles page</a>) has its own set of permissions. For example, you could give users classified as "Administrators" permission to "administer nodes" but deny this power to ordinary, "authenticated" users. You can use permissions to reveal new features to privileged users (those with subscriptions, for example). Permissions also allow trusted users to share the administrative burden of running a busy site.</p>', array('%role' => url('admin/access/roles')));
    case 'admin/access/roles':
      return t('<p>Roles allow you to fine tune the security and administration of Drupal. A role defines a group of users that have certain privileges as defined in <a href="%permissions">user permissions</a>. Examples of roles include: anonymous user, authenticated user, moderator, administrator and so on. In this area you will define the <em>role names</em> of the various roles. To delete a role choose "edit".</p><p>By default, Drupal comes with two user roles:</p>
      <ul>
      <li>Anonymous user: this role is used for users that don\'t have a user account or that are not authenticated.</li>
      <li>Authenticated user: this role is automatically granted to all logged in users.</li>
      </ul>', array('%permissions' => url('admin/access/permissions')));
    case 'admin/user/search':
      return t('<p>Enter a simple pattern ("*" may be used as a wildcard match) to search for a username.  For example, one may search for "br" and Drupal might return "brian", "brad", and "brenda".</p>');
    case 'admin/user/configure':
    case 'admin/user/configure/settings':
      return t('<p>In order to use the full power of Drupal a visitor must sign up for an account. This page lets you setup how a user signs up, logs out, the guidelines from the system about user subscriptions, and the e-mails the system will send to the user.</p>');
    case 'user/help#user':
      $site = variable_get('site_name', 'this website');

      $output = t("
      <h3>Distributed authentication<a id=\"da\"></a></h3>
      <p>One of the more tedious moments in visiting a new website is filling out the registration form. Here at %site, you do not have to fill out a registration form if you are already a member of %help-links. This capability is called <em>distributed authentication</em>, and is unique to <a href=\"%drupal\">Drupal</a>, the software which powers %site.</p>
      <p>Distributed authentication enables a new user to input a username and password into the login box, and immediately be recognized, even if that user never registered at %site. This works because Drupal knows how to communicate with external registration databases. For example, lets say that new user 'Joe' is already a registered member of <a href=\"%delphi-forums\">Delphi Forums</a>. Drupal informs Joe on registration and login screens that he may login with his Delphi ID instead of registering with %site. Joe likes that idea, and logs in with a username of joe@remote.delphiforums.com and his usual Delphi password. Drupal then contacts the <em>remote.delphiforums.com</em> server behind the scenes (usually using <a href=\"%xml\">XML-RPC</a>, <a href=\"%http-post\">HTTP POST</a>, or <a href=\"%soap\">SOAP</a>) and asks: \"Is the password for user Joe correct?\".  If Delphi replies yes, then we create a new %site account for Joe and log him into it.  Joe may keep on logging into %site in the same manner, and he will always be logged into the same account.</p>", array('%help-links' => (implode(', ', user_auth_help_links())), '%site' => "<em>$site</em>", '%drupal' => 'http://drupal.org', '%delphi-forums' => 'http://www.delphiforums.com', '%xml' => 'http://www.xmlrpc.com', '%http-post' => 'http://www.w3.org/Protocols/', '%soap' => 'http://www.soapware.org'));

        foreach (module_list() as $module) {
          if (module_hook($module, 'auth')) {
            $output .= "<h4><a id=\"$module\"></a>". module_invoke($module, 'info', 'name') .'</h4>';
            $output .= module_invoke($module, 'help', "user/help#$module");
          }
        }

        return $output;
  }

}

/**
 * Menu callback; Prints user-specific help information.
 */
function user_help_page() {
  return user_help('user/help#user');
}

/**
 * Retrieve a list of all user setting/information categories and sort them by weight.
 */
function _user_categories() {
  $categories = array();

  foreach (module_list() as $module) {
    if ($data = module_invoke($module, 'user', 'categories', NULL, NULL, '')) {
      $categories = array_merge($data, $categories);
    }
  }

  usort($categories, '_user_sort');

  return $categories;
}

function _user_sort($a, $b) {
  return $a['weight'] < $b['weight'] ? -1 : ($a['weight'] > $b['weight'] ? 1 : ($a['title'] < $b['title'] ? -1 : 1));
}

/**
 * Retrieve a list of all form elements for the specified category.
 */
function _user_forms(&$edit, $account, $category, $hook = 'form') {
  $groups = array();
  foreach (module_list() as $module) {
    if ($data = module_invoke($module, 'user', $hook, $edit, $account, $category)) {
      $groups = array_merge_recursive($data, $groups);
    }
  }
  uasort($groups, '_user_sort');

  return empty($groups) ? FALSE : $groups;
}

/**
 * Retrieve a pipe delimited string of autocomplete suggestions for existing users
 */
function user_autocomplete($string) {
  $matches = array();
  $result = db_query_range("SELECT name FROM {users} WHERE LOWER(name) LIKE LOWER('%s%%')", $string, 0, 10);
  while ($user = db_fetch_object($result)) {
    $matches[$user->name] = check_plain($user->name);
  }
  print drupal_to_js($matches);
  exit();
}