<?php
// $Id: themekey.module,v 1.11 2009-11-09 20:02:51 mkalkbrenner Exp $

require_once(drupal_get_path('module', 'themekey') .'/themekey_base.inc');

/**
 * Implementation of hook_theme()
 */
function themekey_theme() {
  return array(
    'themekey_table' => array(
      'arguments' => array('form' => NULL),
    )
  );
}

/**
 * Implementation of hook_perm().
 */
function themekey_perm() {
  return array('administer theme assignments', 'administer themekey settings');
}

/**
 * Implementation of hook_menu().
 */
function themekey_menu() {
  $items = array();
  $items['admin/settings/themekey'] = array(
    'title' => 'ThemeKey',
    'description' => 'Map themes to Drupal paths or object properties.',
    'access callback' => 'user_access',
    'access arguments' => array('administer theme assignments'),
    'file' => 'themekey_admin.inc',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('_themekey_paths_form')
  );
  $items['admin/settings/themekey/paths'] = array(
    'title' => 'Paths',
    'type' => MENU_DEFAULT_LOCAL_TASK,
    'weight' => 0
  );
  $items['admin/settings/themekey/properties'] = array(
    'title' => 'Properties',
    'access callback' => 'user_access',
    'access arguments' => array('administer theme assignments'),
    'file' => 'themekey_admin.inc',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('_themekey_properties_form'),
    'type' => MENU_LOCAL_TASK,
    'weight' => 1
  );
  $items['admin/settings/themekey/settings'] = array(
    'title' => 'Settings',
    'access callback' => 'user_access',
    'access arguments' => array('administer themekey settings'),
    'file' => 'themekey_admin.inc',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('_themekey_settings_form'),
    'type' => MENU_LOCAL_TASK,
    'weight' => 5
  );
  $items['admin/settings/themekey/settings/general'] = array(
    'title' => 'General',
    'type' => MENU_DEFAULT_LOCAL_TASK,
    'weight' => 0
  );

  return $items;
}

/**
 * Implementation of hook_themekey_properties().
 */
function themekey_themekey_properties() {
  require_once(drupal_get_path('module', 'themekey') .'/themekey_build.inc');
  return _themekey_invoke_modules('themekey_properties');
}

/**
 * Implementation of hook_themekey_global().
 */
function themekey_themekey_global() {
  require_once(drupal_get_path('module', 'themekey') .'/themekey_build.inc');
  return _themekey_invoke_modules('themekey_global');
}

/**
 * Implementation of hook_themekey_paths().
 */
function themekey_themekey_paths() {
  require_once(drupal_get_path('module', 'themekey') .'/themekey_build.inc');
  return _themekey_invoke_modules('themekey_paths');
}

/**
 * Implementation of hook_init().
 */
function themekey_init() {
  global $custom_theme;

  // don't change theme when another module already set a $custom_theme like system.module does (administration theme)
  // don't change theme when administer blocks
  if (!$custom_theme && strpos($_GET['q'], 'admin/build/block') !== 0) {
    $parameters = _themekey_get_global_parameters();
    // if a node is requested which has a theme asigned via themekey_ui, use it
    $theme = !empty($parameters['node:theme']) ? $parameters['node:theme'] : '';

    if (!empty($theme) && !_themekey_check_theme_enabled($theme)) {
      $theme = '';
    }

    if (empty($theme) || 'default' == $theme) {
      // Try to get theme for the normal Drupal path
      $theme = _themekey_match_paths($_GET['q']);
      if (!$theme) {
        // Derive path from request_uri
        $offset = (variable_get('clean_url', 0) ? 0 : 3) + strlen(base_path());
        $alias_uri = substr(request_uri(), $offset);
        if (strpos($alias_uri, '?') !== FALSE) {
          // Remove query string from request uri
          $alias_uri_parts = explode('?', $alias_uri);
          $alias_uri = $alias_uri_parts[0];
        }
        // For $alias_uri != $_GET['q'] the page was requested using an
        // aliased path, otherwise get the path alias internally
        if (($alias_uri == $_GET['q']) && module_exists('path')) {
          $alias_uri = drupal_get_path_alias($_GET['q']);
        }
        // Try to get the theme for the aliased Drupal path
        $theme = _themekey_match_paths($alias_uri);
      }

      if (!$theme) {
        $theme = _themekey_match_properties();
      }

      // If no theme has been triggered but a theme
      // is in the user's session, use that theme.
      if (!$theme && isset($_SESSION['themekey_theme'])
          && (!$custom_theme || $custom_theme == variable_get('theme_default', 'garland'))) {
        $custom_theme = $_SESSION['themekey_theme'];
      }
    }

    // We have a theme, apply it
    if (!empty($theme) && $theme != 'default') {
      if (variable_get('themekey_theme_maintain', 0)) {
        $_SESSION['themekey_theme'] = $theme;
      }
      $custom_theme = $theme;
    }
  }
}