<?php
/*
 * Auto CAS User
 * Copyright © 2015 David Thompson <davet@gnu.org>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

function auto_cas_user_cas_user_alter(&$cas_user) {
  $username = $cas_user['name'];

  // Test for existing CAS user
  $count = db_select('cas_user', 'c')
    ->condition('cas_name', $username)
    ->countQuery()->execute()->fetchfield();

  if($count == 0) {
    $account = user_load_by_name($username);

    if($account) {
      // User exists but doesn't have a CAS user record, so create
      // one.
      db_insert('cas_user')
        ->fields(array('cas_name' => $username,
                       'uid' => $account->uid))
        ->execute();
    }
  }
}