<?php
// $Id: subdomain.inc,v 1.3 2010-10-17 19:03:24 setvik Exp $

/**
 * @file
 * Subdomain engine base class
 */

/**
 * Description of subdomain engine
 */
class subdomain_engine {
  var $mode;
  var $source;
  var $home;
  var $view;
  var $form_field;

  // Constructor
  function subdomain_engine() {
    $this->mode = variable_get('subdomain_mode', 'user');
    $this->source = variable_get('subdomain_source', 'default');
    $this->home = variable_get('subdomain_home', 'default');
    $this->view = variable_get('subdomain_view', '');

    if ($this->source == 'default') {
      $this->form_field = $this->default_form_field();
    }
    else {
      $this->form_field = 'subdomain';
    }
  }

  function default_form_field() {
    return 'name';
  }

  function get_homepage_path($sid) {
    if ($this->home == 'default') {
      return subdomain()->base_path($sid);
    }
    else {
      return "subdomain/homepage/$sid";
    }
  }

  function data_handler($op, $requireMode, $object) {
    if ($requireMode == $this->mode) {
      switch ($op) {
        case 'insert':
          if (user_access('create subdomains')) {
            $this->save($object);
          }
          break;
        case 'update':
          if (user_access('edit subdomains')) {
            $this->save($object);
          }
          break;
        case 'delete':
          $this->delete($object);
          break;
      }
    }
  }

  /**
   * Prepares subdomain for saving
   */
  function clean($raw) {
    // Replace spaces with dashes] & convert to lower case
    $raw = strtolower(str_replace(" ", "-", $raw));
    return preg_replace("/[^a-z-]/", "", $raw);
  }

  function exists($value) {
    $sid = subdomain_get_sid($value);
    return !empty($sid);
  }

  function save_record($id, $raw, $insert = FALSE) {
    $row->sid = $id;
    $row->subdomain = $this->clean($raw);
    if ($row->subdomain) {
      drupal_write_record('subdomain', $row, $insert ? array() : array('sid'));
    }
    else {
      // Delete subdomain if blank (site admins can enter blank subdomains)
      $this->delete_record($row->sid);
    }
  }

  function delete_record($sid) {
    db_query('DELETE FROM {subdomain} WHERE sid = :sid', array(':sid' => $sid));
  }
}