1 <?php

     2 // $Id: system.module,v 1.585.2.38 2009/07/01 20:51:56 goba Exp $

     3 

     4 /**

     5  * @file

     6  * Configuration system that lets administrators modify the workings of the site.

     7  */

     8 

     9 /**

    10  * The current system version.

    11  */

    12 define('VERSION', '6.13');

    13 

    14 /**

    15  * Core API compatibility.

    16  */

    17 define('DRUPAL_CORE_COMPATIBILITY', '6.x');

    18 

    19 /**

    20  * Minimum supported version of PHP.

    21  */

    22 define('DRUPAL_MINIMUM_PHP',    '4.3.5');

    23 

    24 /**

    25  * Minimum recommended value of PHP memory_limit.

    26  */

    27 define('DRUPAL_MINIMUM_PHP_MEMORY_LIMIT',    '16M');

    28 

    29 /**

    30  * Minimum supported version of MySQL, if it is used.

    31  */

    32 define('DRUPAL_MINIMUM_MYSQL',  '4.1.1');

    33 

    34 /**

    35  * Minimum supported version of PostgreSQL, if it is used.

    36  */

    37 define('DRUPAL_MINIMUM_PGSQL',  '7.4');

    38 

    39 /**

    40  * Maximum age of temporary files in seconds.

    41  */

    42 define('DRUPAL_MAXIMUM_TEMP_FILE_AGE', 21600);

    43 

    44 /**

    45  * Implementation of hook_help().

    46  */

    47 function system_help($path, $arg) {

    48   global $base_url;

    49 

    50   switch ($path) {

    51     case 'admin/help#system':

    52       $output = '<p>'. t('The system module is at the foundation of your Drupal website, and provides basic but extensible functionality for use by other modules and themes. Some integral elements of Drupal are contained in and managed by the system module, including caching, enabling or disabling of modules and themes, preparing and displaying the administrative page, and configuring fundamental site settings. A number of key system maintenance operations are also part of the system module.') .'</p>';

    53       $output .= '<p>'. t('The system module provides:') .'</p>';

    54       $output .= '<ul><li>'. t('support for enabling and disabling <a href="@modules">modules</a>. Drupal comes packaged with a number of core modules; each module provides a discrete set of features and may be enabled depending on the needs of your site. A wide array of additional modules contributed by members of the Drupal community are available for download at the <a href="@drupal-modules">Drupal.org module page</a>.', array('@modules' => url('admin/build/modules'), '@drupal-modules' => 'http://drupal.org/project/modules')) .'</li>';

    55       $output .= '<li>'. t('support for enabling and disabling <a href="@themes">themes</a>, which determine the design and presentation of your site. Drupal comes packaged with several core themes and additional contributed themes are available at the <a href="@drupal-themes">Drupal.org theme page</a>.', array('@themes' => url('admin/build/themes'), '@drupal-themes' => 'http://drupal.org/project/themes')) .'</li>';

    56       $output .= '<li>'. t('a robust <a href="@cache-settings">caching system</a> that allows the efficient re-use of previously-constructed web pages and web page components. Drupal stores the pages requested by anonymous users in a compressed format; depending on your site configuration and the amount of your web traffic tied to anonymous visitors, Drupal\'s caching system may significantly increase the speed of your site.', array('@cache-settings' => url('admin/settings/performance'))) .'</li>';

    57       $output .= '<li>'. t('a set of routine administrative operations that rely on a correctly-configured <a href="@cron">cron maintenance task</a> to run automatically. A number of other modules, including the feed aggregator, ping module and search also rely on <a href="@cron">cron maintenance tasks</a>. For more information, see the online handbook entry for <a href="@handbook">configuring cron jobs</a>.', array('@cron' => url('admin/reports/status'), '@handbook' => 'http://drupal.org/cron')) .'</li>';

    58       $output .= '<li>'. t('basic configuration options for your site, including <a href="@date-settings">date and time settings</a>, <a href="@file-system">file system settings</a>, <a href="@clean-url">clean URL support</a>, <a href="@site-info">site name and other information</a>, and a <a href="@site-maintenance">site maintenance</a> function for taking your site temporarily off-line.', array('@date-settings' => url('admin/settings/date-time'), '@file-system' => url('admin/settings/file-system'), '@clean-url' => url('admin/settings/clean-urls'), '@site-info' => url('admin/settings/site-information'), '@site-maintenance' => url('admin/settings/site-maintenance'))) .'</li></ul>';

    59       $output .= '<p>'. t('For more information, see the online handbook entry for <a href="@system">System module</a>.', array('@system' => 'http://drupal.org/handbook/modules/system/')) .'</p>';

    60       return $output;

    61     case 'admin':

    62       return '<p>'. t('Welcome to the administration section. Here you may control how your site functions.') .'</p>';

    63     case 'admin/by-module':

    64       return '<p>'. t('This page shows you all available administration tasks for each module.') .'</p>';

    65     case 'admin/build/themes':

    66       $output = '<p>'. t('Select which themes are available to your users and specify the default theme. To configure site-wide display settings, click the "configure" task above. Alternatively, to override these settings in a specific theme, click the "configure" link for that theme. Note that different themes may have different regions available for displaying content; for consistency in presentation, you may wish to enable only one theme.') .'</p>';

    67       $output .= '<p>'. t('To change the appearance of your site, a number of <a href="@themes">contributed themes</a> are available.', array('@themes' => 'http://drupal.org/project/themes')) .'</p>';

    68       return $output;

    69     case 'admin/build/themes/settings/'. $arg[4]:

    70       $reference = explode('.', $arg[4], 2);

    71       $theme = array_pop($reference);

    72       return '<p>'. t('These options control the display settings for the <code>%template</code> theme. When your site is displayed using this theme, these settings will be used. By clicking "Reset to defaults," you can choose to use the <a href="@global">global settings</a> for this theme.', array('%template' => $theme, '@global' => url('admin/build/themes/settings'))) .'</p>';

    73     case 'admin/build/themes/settings':

    74       return '<p>'. t('These options control the default display settings for your entire site, across all themes. Unless they have been overridden by a specific theme, these settings will be used.') .'</p>';

    75     case 'admin/build/modules':

    76       $output = '<p>'. t('Modules are plugins that extend Drupal\'s core functionality. Enable modules by selecting the <em>Enabled</em> checkboxes below and clicking the <em>Save configuration</em> button. Once a module is enabled, new <a href="@permissions">permissions</a> may be available. To reduce server load, modules with their <em>Throttle</em> checkbox selected are temporarily disabled when your site becomes extremely busy. (Note that the <em>Throttle</em> checkbox is only available if the Throttle module is enabled.)', array('@permissions' => url('admin/user/permissions')));

    77       if (module_exists('throttle')) {

    78         $output .= ' '. t('The auto-throttle functionality must be enabled on the <a href="@throttle">throttle configuration page</a> after having enabled the throttle module.', array('@throttle' => url('admin/settings/throttle')));

    79       }

    80       $output .= '</p>';

    81       $output .= '<p>'. t('It is important that <a href="@update-php">update.php</a> is run every time a module is updated to a newer version.', array('@update-php' => $base_url .'/update.php')) .'</p>';

    82       $output .= '<p>'. t('You can find all administration tasks belonging to a particular module on the <a href="@by-module">administration by module page</a>.', array('@by-module' => url('admin/by-module'))) .'</p>';

    83       $output .= '<p>'. t('To extend the functionality of your site, a number of <a href="@modules">contributed modules</a> are available.', array('@modules' => 'http://drupal.org/project/modules')) .'</p>';

    84       return $output;

    85     case 'admin/build/modules/uninstall':

    86       return '<p>'. t('The uninstall process removes all data related to a module. To uninstall a module, you must first disable it. Not all modules support this feature.') .'</p>';

    87     case 'admin/build/block/configure':

    88       if ($arg[4] == 'system' && $arg[5] == 0) {

    89         return '<p>'. t('The <em>Powered by Drupal</em> block is an optional link to the home page of the Drupal project. While there is absolutely no requirement that sites feature this link, it may be used to show support for Drupal.') .'</p>';

    90       }

    91       break;

    92     case 'admin/settings/actions':

    93     case 'admin/settings/actions/manage':

    94       $output = '<p>'. t('Actions are individual tasks that the system can do, such as unpublishing a piece of content or banning a user. Modules, such as the trigger module, can fire these actions when certain system events happen; for example, when a new post is added or when a user logs in. Modules may also provide additional actions.') .'</p>';

    95       $output .= '<p>'. t('There are two types of actions: simple and advanced. Simple actions do not require any additional configuration, and are listed here automatically. Advanced actions can do more than simple actions; for example, send an e-mail to a specified address, or check for certain words within a piece of content. These actions need to be created and configured first before they may be used. To create an advanced action, select the action from the drop-down below and click the <em>Create</em> button.') .'</p>';

    96       if (module_exists('trigger')) {

    97         $output .= '<p>'. t('You may proceed to the <a href="@url">Triggers</a> page to assign these actions to system events.', array('@url' => url('admin/build/trigger'))) .'</p>';

    98       }

    99       return $output;

   100     case 'admin/settings/actions/configure':

   101       return t('An advanced action offers additional configuration options which may be filled out below. Changing the <em>Description</em> field is recommended, in order to better identify the precise action taking place. This description will be displayed in modules such as the trigger module when assigning actions to system events, so it is best if it is as descriptive as possible (for example, "Send e-mail to Moderation Team" rather than simply "Send e-mail").');

   102     case 'admin/reports/status':

   103       return '<p>'. t("Here you can find a short overview of your site's parameters as well as any problems detected with your installation. It may be useful to copy and paste this information into support requests filed on drupal.org's support forums and project issue queues.") .'</p>';

   104   }

   105 }

   106 

   107 /**

   108  * Implementation of hook_theme().

   109  */

   110 function system_theme() {

   111   return array_merge(drupal_common_theme(), array(

   112     'system_theme_select_form' => array(

   113       'arguments' => array('form' => NULL),

   114       'file' => 'system.admin.inc',

   115     ),

   116     'system_themes_form' => array(

   117       'arguments' => array('form' => NULL),

   118       'file' => 'system.admin.inc',

   119     ),

   120     'system_modules' => array(

   121       'arguments' => array('form' => NULL),

   122       'file' => 'system.admin.inc',

   123     ),

   124     'system_modules_uninstall' => array(

   125       'arguments' => array('form' => NULL),

   126       'file' => 'system.admin.inc',

   127     ),

   128     'status_report' => array(

   129       'arguments' => array('requirements' => NULL),

   130       'file' => 'system.admin.inc',

   131     ),

   132     'admin_page' => array(

   133       'arguments' => array('blocks' => NULL),

   134       'file' => 'system.admin.inc',

   135     ),

   136     'admin_block' => array(

   137       'arguments' => array('block' => NULL),

   138       'file' => 'system.admin.inc',

   139     ),

   140     'admin_block_content' => array(

   141       'arguments' => array('content' => NULL),

   142       'file' => 'system.admin.inc',

   143     ),

   144     'system_admin_by_module' => array(

   145       'arguments' => array('menu_items' => NULL),

   146       'file' => 'system.admin.inc',

   147     ),

   148     'system_powered_by' => array(

   149       'arguments' => array('image_path' => NULL),

   150     ),

   151   ));

   152 }

   153 

   154 /**

   155  * Implementation of hook_perm().

   156  */

   157 function system_perm() {

   158   return array('administer site configuration', 'access administration pages', 'administer actions', 'access site reports', 'select different theme', 'administer files');

   159 }

   160 

   161 /**

   162  * Implementation of hook_elements().

   163  */

   164 function system_elements() {

   165   // Top level form

   166   $type['form'] = array('#method' => 'post', '#action' => request_uri());

   167 

   168   // Inputs

   169   $type['submit'] = array('#input' => TRUE, '#name' => 'op', '#button_type' => 'submit', '#executes_submit_callback' => TRUE, '#process' => array('form_expand_ahah'));

   170   $type['button'] = array('#input' => TRUE, '#name' => 'op', '#button_type' => 'submit', '#executes_submit_callback' => FALSE, '#process' => array('form_expand_ahah'));

   171   $type['image_button'] = array('#input' => TRUE, '#button_type' => 'submit', '#executes_submit_callback' => TRUE, '#process' => array('form_expand_ahah'), '#return_value' => TRUE, '#has_garbage_value' => TRUE, '#src' => NULL);

   172   $type['textfield'] = array('#input' => TRUE, '#size' => 60, '#maxlength' => 128, '#autocomplete_path' => FALSE, '#process' => array('form_expand_ahah'));

   173   $type['password'] = array('#input' => TRUE, '#size' => 60, '#maxlength' => 128, '#process' => array('form_expand_ahah'));

   174   $type['password_confirm'] = array('#input' => TRUE, '#process' => array('expand_password_confirm'));

   175   $type['textarea'] = array('#input' => TRUE, '#cols' => 60, '#rows' => 5, '#resizable' => TRUE, '#process' => array('form_expand_ahah'));

   176   $type['radios'] = array('#input' => TRUE, '#process' => array('expand_radios'));

   177   $type['radio'] = array('#input' => TRUE, '#default_value' => NULL, '#process' => array('form_expand_ahah'));

   178   $type['checkboxes'] = array('#input' => TRUE, '#process' => array('expand_checkboxes'), '#tree' => TRUE);

   179   $type['checkbox'] = array('#input' => TRUE, '#return_value' => 1, '#process' => array('form_expand_ahah'));

   180   $type['select'] = array('#input' => TRUE, '#size' => 0, '#multiple' => FALSE, '#process' => array('form_expand_ahah'));

   181   $type['weight'] = array('#input' => TRUE, '#delta' => 10, '#default_value' => 0, '#process' => array('process_weight', 'form_expand_ahah'));

   182   $type['date'] = array('#input' => TRUE, '#process' => array('expand_date'), '#element_validate' => array('date_validate'));

   183   $type['file'] = array('#input' => TRUE, '#size' => 60);

   184 

   185   // Form structure

   186   $type['item'] = array('#value' => '');

   187   $type['hidden'] = array('#input' => TRUE, '#process' => array('form_expand_ahah'));

   188   $type['value'] = array('#input' => TRUE);

   189   $type['markup'] = array('#prefix' => '', '#suffix' => '');

   190   $type['fieldset'] = array('#collapsible' => FALSE, '#collapsed' => FALSE, '#value' => NULL, '#process' => array('form_expand_ahah'));

   191   $type['token'] = array('#input' => TRUE);

   192   return $type;

   193 }

   194 

   195 /**

   196  * Implementation of hook_menu().

   197  */

   198 function system_menu() {

   199   $items['system/files'] = array(

   200     'title' => 'File download',

   201     'page callback' => 'file_download',

   202     'access callback' => TRUE,

   203     'type' => MENU_CALLBACK,

   204   );

   205   $items['admin'] = array(

   206     'title' => 'Administer',

   207     'access arguments' => array('access administration pages'),

   208     'page callback' => 'system_main_admin_page',

   209     'weight' => 9,

   210     'file' => 'system.admin.inc',

   211   );

   212   $items['admin/compact'] = array(

   213     'title' => 'Compact mode',

   214     'page callback' => 'system_admin_compact_page',

   215     'access arguments' => array('access administration pages'),

   216     'type' => MENU_CALLBACK,

   217     'file' => 'system.admin.inc',

   218   );

   219   $items['admin/by-task'] = array(

   220     'title' => 'By task',

   221     'page callback' => 'system_main_admin_page',

   222     'access arguments' => array('access administration pages'),

   223     'file' => 'system.admin.inc',

   224     'type' => MENU_DEFAULT_LOCAL_TASK,

   225   );

   226   $items['admin/by-module'] = array(

   227     'title' => 'By module',

   228     'page callback' => 'system_admin_by_module',

   229     'access arguments' => array('access administration pages'),

   230     'file' => 'system.admin.inc',

   231     'type' => MENU_LOCAL_TASK,

   232     'weight' => 2,

   233   );

   234   $items['admin/content'] = array(

   235     'title' => 'Content management',

   236     'description' => "Manage your site's content.",

   237     'position' => 'left',

   238     'weight' => -10,

   239     'page callback' => 'system_admin_menu_block_page',

   240     'access arguments' => array('access administration pages'),

   241     'file' => 'system.admin.inc',

   242   );

   243 

   244   // menu items that are basically just menu blocks

   245   $items['admin/settings'] = array(

   246     'title' => 'Site configuration',

   247     'description' => 'Adjust basic site configuration options.',

   248     'position' => 'right',

   249     'weight' => -5,

   250     'page callback' => 'system_settings_overview',

   251     'access arguments' => array('access administration pages'),

   252     'file' => 'system.admin.inc',

   253   );

   254   $items['admin/build'] = array(

   255     'title' => 'Site building',

   256     'description' => 'Control how your site looks and feels.',

   257     'position' => 'right',

   258     'weight' => -10,

   259     'page callback' => 'system_admin_menu_block_page',

   260     'access arguments' => array('access administration pages'),

   261     'file' => 'system.admin.inc',

   262   );

   263   $items['admin/settings/admin'] = array(

   264     'title' => 'Administration theme',

   265     'description' => 'Settings for how your administrative pages should look.',

   266     'position' => 'left',

   267     'page callback' => 'drupal_get_form',

   268     'page arguments' => array('system_admin_theme_settings'),

   269     'access arguments' => array('administer site configuration'),

   270     'block callback' => 'system_admin_theme_settings',

   271     'file' => 'system.admin.inc',

   272   );

   273   // Themes:

   274   $items['admin/build/themes'] = array(

   275     'title' => 'Themes',

   276     'description' => 'Change which theme your site uses or allows users to set.',

   277     'page callback' => 'drupal_get_form',

   278     'page arguments' => array('system_themes_form', NULL),

   279     'access arguments' => array('administer site configuration'),

   280     'file' => 'system.admin.inc',

   281   );

   282   $items['admin/build/themes/select'] = array(

   283     'title' => 'List',

   284     'description' => 'Select the default theme.',

   285     'type' => MENU_DEFAULT_LOCAL_TASK,

   286     'weight' => -1,

   287   );

   288   $items['admin/build/themes/settings'] = array(

   289     'title' => 'Configure',

   290     'page arguments' => array('system_theme_settings'),

   291     'access arguments' => array('administer site configuration'),

   292     'type' => MENU_LOCAL_TASK,

   293   );

   294   // Theme configuration subtabs

   295   $items['admin/build/themes/settings/global'] = array(

   296     'title' => 'Global settings',

   297     'type' => MENU_DEFAULT_LOCAL_TASK,

   298     'weight' => -1,

   299   );

   300 

   301   foreach (list_themes() as $theme) {

   302     $items['admin/build/themes/settings/'. $theme->name] = array(

   303       'title' => $theme->info['name'],

   304       'page arguments' => array('system_theme_settings', $theme->name),

   305       'type' => MENU_LOCAL_TASK,

   306       'access callback' => '_system_themes_access',

   307       'access arguments' => array($theme),

   308     );

   309   }

   310 

   311   // Modules:

   312   $items['admin/build/modules'] = array(

   313     'title' => 'Modules',

   314     'description' => 'Enable or disable add-on modules for your site.',

   315     'page callback' => 'drupal_get_form',

   316     'page arguments' => array('system_modules'),

   317     'access arguments' => array('administer site configuration'),

   318     'file' => 'system.admin.inc',

   319   );

   320   $items['admin/build/modules/list'] = array(

   321     'title' => 'List',

   322     'type' => MENU_DEFAULT_LOCAL_TASK,

   323   );

   324   $items['admin/build/modules/list/confirm'] = array(

   325     'title' => 'List',

   326     'access arguments' => array('administer site configuration'),

   327     'type' => MENU_CALLBACK,

   328   );

   329   $items['admin/build/modules/uninstall'] = array(

   330     'title' => 'Uninstall',

   331     'page arguments' => array('system_modules_uninstall'),

   332     'access arguments' => array('administer site configuration'),

   333     'type' => MENU_LOCAL_TASK,

   334   );

   335   $items['admin/build/modules/uninstall/confirm'] = array(

   336     'title' => 'Uninstall',

   337     'access arguments' => array('administer site configuration'),

   338     'type' => MENU_CALLBACK,

   339   );

   340 

   341   // Actions:

   342   $items['admin/settings/actions'] = array(

   343     'title' => 'Actions',

   344     'description' => 'Manage the actions defined for your site.',

   345     'access arguments' => array('administer actions'),

   346     'page callback' => 'system_actions_manage'

   347   );

   348   $items['admin/settings/actions/manage'] = array(

   349     'title' => 'Manage actions',

   350     'description' => 'Manage the actions defined for your site.',

   351     'page callback' => 'system_actions_manage',

   352     'type' => MENU_DEFAULT_LOCAL_TASK,

   353     'weight' => -2,

   354   );

   355   $items['admin/settings/actions/configure'] = array(

   356     'title' => 'Configure an advanced action',

   357     'page callback' => 'drupal_get_form',

   358     'page arguments' => array('system_actions_configure'),

   359     'access arguments' => array('administer actions'),

   360     'type' => MENU_CALLBACK,

   361   );

   362   $items['admin/settings/actions/delete/%actions'] = array(

   363     'title' => 'Delete action',

   364     'description' => 'Delete an action.',

   365     'page callback' => 'drupal_get_form',

   366     'page arguments' => array('system_actions_delete_form', 4),

   367     'access arguments' => array('administer actions'),

   368     'type' => MENU_CALLBACK,

   369   );

   370   $items['admin/settings/actions/orphan'] = array(

   371     'title' => 'Remove orphans',

   372     'page callback' => 'system_actions_remove_orphans',

   373     'access arguments' => array('administer actions'),

   374     'type' => MENU_CALLBACK,

   375   );

   376 

   377   // Settings:

   378   $items['admin/settings/site-information'] = array(

   379     'title' => 'Site information',

   380     'description' => 'Change basic site information, such as the site name, slogan, e-mail address, mission, front page and more.',

   381     'page callback' => 'drupal_get_form',

   382     'page arguments' => array('system_site_information_settings'),

   383     'access arguments' => array('administer site configuration'),

   384     'file' => 'system.admin.inc',

   385   );

   386   $items['admin/settings/error-reporting'] = array(

   387     'title' => 'Error reporting',

   388     'description' => 'Control how Drupal deals with errors including 403/404 errors as well as PHP error reporting.',

   389     'page callback' => 'drupal_get_form',

   390     'page arguments' => array('system_error_reporting_settings'),

   391     'access arguments' => array('administer site configuration'),

   392     'file' => 'system.admin.inc',

   393   );

   394   $items['admin/settings/logging'] = array(

   395     'title' => 'Logging and alerts',

   396     'description' => "Settings for logging and alerts modules. Various modules can route Drupal's system events to different destination, such as syslog, database, email, ...etc.",

   397     'page callback' => 'system_logging_overview',

   398     'access arguments' => array('administer site configuration'),

   399     'file' => 'system.admin.inc',

   400   );

   401   $items['admin/settings/performance'] = array(

   402     'title' => 'Performance',

   403     'description' => 'Enable or disable page caching for anonymous users and set CSS and JS bandwidth optimization options.',

   404     'page callback' => 'drupal_get_form',

   405     'page arguments' => array('system_performance_settings'),

   406     'access arguments' => array('administer site configuration'),

   407     'file' => 'system.admin.inc',

   408   );

   409   $items['admin/settings/file-system'] = array(

   410     'title' => 'File system',

   411     'description' => 'Tell Drupal where to store uploaded files and how they are accessed.',

   412     'page callback' => 'drupal_get_form',

   413     'page arguments' => array('system_file_system_settings'),

   414     'access arguments' => array('administer site configuration'),

   415     'file' => 'system.admin.inc',

   416   );

   417   $items['admin/settings/image-toolkit'] = array(

   418     'title' => 'Image toolkit',

   419     'description' => 'Choose which image toolkit to use if you have installed optional toolkits.',

   420     'page callback' => 'drupal_get_form',

   421     'page arguments' => array('system_image_toolkit_settings'),

   422     'access arguments' => array('administer site configuration'),

   423     'file' => 'system.admin.inc',

   424   );

   425   $items['admin/content/rss-publishing'] = array(

   426     'title' => 'RSS publishing',

   427     'description' => 'Configure the number of items per feed and whether feeds should be titles/teasers/full-text.',

   428     'page callback' => 'drupal_get_form',

   429     'page arguments' => array('system_rss_feeds_settings'),

   430     'access arguments' => array('administer site configuration'),

   431     'file' => 'system.admin.inc',

   432   );

   433   $items['admin/settings/date-time'] = array(

   434     'title' => 'Date and time',

   435     'description' => "Settings for how Drupal displays date and time, as well as the system's default timezone.",

   436     'page callback' => 'drupal_get_form',

   437     'page arguments' => array('system_date_time_settings'),

   438     'access arguments' => array('administer site configuration'),

   439     'file' => 'system.admin.inc',

   440   );

   441   $items['admin/settings/date-time/lookup'] = array(

   442     'title' => 'Date and time lookup',

   443     'type' => MENU_CALLBACK,

   444     'page callback' => 'system_date_time_lookup',

   445     'access arguments' => array('administer site configuration'),

   446     'file' => 'system.admin.inc',

   447   );

   448   $items['admin/settings/site-maintenance'] = array(

   449     'title' => 'Site maintenance',

   450     'description' => 'Take the site off-line for maintenance or bring it back online.',

   451     'page callback' => 'drupal_get_form',

   452     'page arguments' => array('system_site_maintenance_settings'),

   453     'access arguments' => array('administer site configuration'),

   454     'file' => 'system.admin.inc',

   455   );

   456   $items['admin/settings/clean-urls'] = array(

   457     'title' => 'Clean URLs',

   458     'description' => 'Enable or disable clean URLs for your site.',

   459     'page callback' => 'drupal_get_form',

   460     'page arguments' => array('system_clean_url_settings'),

   461     'access arguments' => array('administer site configuration'),

   462     'file' => 'system.admin.inc',

   463   );

   464   $items['admin/settings/clean-urls/check'] = array(

   465     'title' => 'Clean URL check',

   466     'page callback' => 'drupal_json',

   467     'page arguments' => array(array('status' => TRUE)),

   468     'access callback' => TRUE,

   469     'type' => MENU_CALLBACK,

   470   );

   471 

   472   // Reports:

   473   $items['admin/reports'] = array(

   474     'title' => 'Reports',

   475     'description' => 'View reports from system logs and other status information.',

   476     'page callback' => 'system_admin_menu_block_page',

   477     'access arguments' => array('access site reports'),

   478     'weight' => 5,

   479     'position' => 'left',

   480     'file' => 'system.admin.inc',

   481   );

   482   $items['admin/reports/status'] = array(

   483     'title' => 'Status report',

   484     'description' => "Get a status report about your site's operation and any detected problems.",

   485     'page callback' => 'system_status',

   486     'weight' => 10,

   487     'access arguments' => array('administer site configuration'),

   488     'file' => 'system.admin.inc',

   489   );

   490   $items['admin/reports/status/run-cron'] = array(

   491     'title' => 'Run cron',

   492     'page callback' => 'system_run_cron',

   493     'access arguments' => array('administer site configuration'),

   494     'type' => MENU_CALLBACK,

   495     'file' => 'system.admin.inc',

   496   );

   497   $items['admin/reports/status/php'] = array(

   498     'title' => 'PHP',

   499     'page callback' => 'system_php',

   500     'access arguments' => array('administer site configuration'),

   501     'type' => MENU_CALLBACK,

   502     'file' => 'system.admin.inc',

   503   );

   504   $items['admin/reports/status/sql'] = array(

   505     'title' => 'SQL',

   506     'page callback' => 'system_sql',

   507     'access arguments' => array('administer site configuration'),

   508     'type' => MENU_CALLBACK,

   509     'file' => 'system.admin.inc',

   510   );

   511   // Default page for batch operations

   512   $items['batch'] = array(

   513     'page callback' => 'system_batch_page',

   514     'access callback' => TRUE,

   515     'type' => MENU_CALLBACK,

   516     'file' => 'system.admin.inc',

   517   );

   518   return $items;

   519 }

   520 

   521 /**

   522  * Menu item access callback - only admin or enabled themes can be accessed.

   523  */

   524 function _system_themes_access($theme) {

   525   return user_access('administer site configuration') && ($theme->status || $theme->name == variable_get('admin_theme', '0'));

   526 }

   527 

   528 /**

   529  * Implementation of hook_init().

   530  */

   531 function system_init() {

   532   // Use the administrative theme if the user is looking at a page in the admin/* path.

   533   if (arg(0) == 'admin' || (variable_get('node_admin_theme', '0') && arg(0) == 'node' && (arg(1) == 'add' || arg(2) == 'edit'))) {

   534     global $custom_theme;

   535     $custom_theme = variable_get('admin_theme', '0');

   536     drupal_add_css(drupal_get_path('module', 'system') .'/admin.css', 'module');

   537   }

   538 

   539   // Add the CSS for this module.

   540   drupal_add_css(drupal_get_path('module', 'system') .'/defaults.css', 'module');

   541   drupal_add_css(drupal_get_path('module', 'system') .'/system.css', 'module');

   542   drupal_add_css(drupal_get_path('module', 'system') .'/system-menus.css', 'module');

   543 }

   544 

   545 /**

   546  * Implementation of hook_user().

   547  *

   548  * Allows users to individually set their theme and time zone.

   549  */

   550 function system_user($type, $edit, &$user, $category = NULL) {

   551   if ($type == 'form' && $category == 'account') {

   552     $form['theme_select'] = system_theme_select_form(t('Selecting a different theme will change the look and feel of the site.'), isset($edit['theme']) ? $edit['theme'] : NULL, 2);

   553 

   554     if (variable_get('configurable_timezones', 1)) {

   555       $zones = _system_zonelist();

   556       $form['timezone'] = array(

   557         '#type' => 'fieldset',

   558         '#title' => t('Locale settings'),

   559         '#weight' => 6,

   560         '#collapsible' => TRUE,

   561       );

   562       $form['timezone']['timezone'] = array(

   563         '#type' => 'select',

   564         '#title' => t('Time zone'),

   565         '#default_value' => strlen($edit['timezone']) ? $edit['timezone'] : variable_get('date_default_timezone', 0),

   566         '#options' => $zones,

   567         '#description' => t('Select your current local time. Dates and times throughout this site will be displayed using this time zone.'),

   568       );

   569     }

   570 

   571     return $form;

   572   }

   573 }

   574 

   575 /**

   576  * Implementation of hook_block().

   577  *

   578  * Generate a block with a promotional link to Drupal.org.

   579  */

   580 function system_block($op = 'list', $delta = 0, $edit = NULL) {

   581   switch ($op) {

   582     case 'list':

   583       $blocks[0] = array(

   584         'info' => t('Powered by Drupal'),

   585         'weight' => '10',

   586          // Not worth caching.

   587         'cache' => BLOCK_NO_CACHE,

   588       );

   589       return $blocks;

   590     case 'configure':

   591       // Compile a list of fields to show

   592       $form['wrapper']['color'] = array(

   593         '#type' => 'select',

   594         '#title' => t('Badge color'),

   595         '#default_value' => variable_get('drupal_badge_color', 'powered-blue'),

   596         '#options' => array('powered-black' => t('Black'), 'powered-blue' => t('Blue'), 'powered-gray' => t('Gray')),

   597       );

   598       $form['wrapper']['size'] = array(

   599         '#type' => 'select',

   600         '#title' => t('Badge size'),

   601         '#default_value' => variable_get('drupal_badge_size', '80x15'),

   602         '#options' => array('80x15' => t('Small'), '88x31' => t('Medium'), '135x42' => t('Large')),

   603       );

   604       return $form;

   605     case 'save':

   606       variable_set('drupal_badge_color', $edit['color']);

   607       variable_set('drupal_badge_size', $edit['size']);

   608       break;

   609     case 'view':

   610       $image_path = 'misc/'. variable_get('drupal_badge_color', 'powered-blue') .'-'. variable_get('drupal_badge_size', '80x15') .'.png';

   611       $block['subject'] = NULL; // Don't display a title

   612       $block['content'] = theme('system_powered_by', $image_path);

   613       return $block;

   614   }

   615 }

   616 

   617 /**

   618  * Provide a single block on the administration overview page.

   619  *

   620  * @param $item

   621  *   The menu item to be displayed.

   622  */

   623 function system_admin_menu_block($item) {

   624   $content = array();

   625   if (!isset($item['mlid'])) {

   626     $item += db_fetch_array(db_query("SELECT mlid, menu_name FROM {menu_links} ml WHERE ml.router_path = '%s' AND module = 'system'", $item['path']));

   627   }

   628   $result = db_query("

   629     SELECT m.load_functions, m.to_arg_functions, m.access_callback, m.access_arguments, m.page_callback, m.page_arguments, m.title, m.title_callback, m.title_arguments, m.type, m.description, ml.*

   630     FROM {menu_links} ml

   631     LEFT JOIN {menu_router} m ON ml.router_path = m.path

   632     WHERE ml.plid = %d AND ml.menu_name = '%s' AND hidden = 0", $item['mlid'], $item['menu_name']);

   633   while ($item = db_fetch_array($result)) {

   634     _menu_link_translate($item);

   635     if (!$item['access']) {

   636       continue;

   637     }

   638     // The link 'description' either derived from the hook_menu 'description' or

   639     // entered by the user via menu module is saved as the title attribute.

   640     if (!empty($item['localized_options']['attributes']['title'])) {

   641       $item['description'] = $item['localized_options']['attributes']['title'];

   642     }

   643     // Prepare for sorting as in function _menu_tree_check_access().

   644     // The weight is offset so it is always positive, with a uniform 5-digits.

   645     $content[(50000 + $item['weight']) .' '. $item['title'] .' '. $item['mlid']] = $item;

   646   }

   647   ksort($content);

   648   return $content;

   649 }

   650 

   651 /**

   652  * Process admin theme form submissions.

   653  */

   654 function system_admin_theme_submit($form, &$form_state) {

   655   // If we're changing themes, make sure the theme has its blocks initialized.

   656   if ($form_state['values']['admin_theme'] && $form_state['values']['admin_theme'] != variable_get('admin_theme', '0')) {

   657     $result = db_result(db_query("SELECT COUNT(*) FROM {blocks} WHERE theme = '%s'", $form_state['values']['admin_theme']));

   658     if (!$result) {

   659       system_initialize_theme_blocks($form_state['values']['admin_theme']);

   660     }

   661   }

   662 }

   663 

   664 /**

   665  * Returns a fieldset containing the theme select form.

   666  *

   667  * @param $description

   668  *    description of the fieldset

   669  * @param $default_value

   670  *    default value of theme radios

   671  * @param $weight

   672  *    weight of the fieldset

   673  * @return

   674  *    a form array

   675  */

   676 function system_theme_select_form($description = '', $default_value = '', $weight = 0) {

   677   if (user_access('select different theme')) {

   678     $enabled = array();

   679     $themes = list_themes();

   680 

   681     foreach ($themes as $theme) {

   682       if ($theme->status) {

   683         $enabled[] = $theme;

   684       }

   685     }

   686 

   687     if (count($enabled) > 1) {

   688       ksort($enabled);

   689 

   690       $form['themes'] = array(

   691         '#type' => 'fieldset',

   692         '#title' => t('Theme configuration'),

   693         '#description' => $description,

   694         '#collapsible' => TRUE,

   695         '#theme' => 'system_theme_select_form'

   696       );

   697 

   698       foreach ($enabled as $info) {

   699         // For the default theme, revert to an empty string so the user's theme updates when the site theme is changed.

   700         $info->key = $info->name == variable_get('theme_default', 'garland') ? '' : $info->name;

   701 

   702         $screenshot = NULL;

   703         $theme_key = $info->name;

   704         while ($theme_key) {

   705           if (file_exists($themes[$theme_key]->info['screenshot'])) {

   706             $screenshot = $themes[$theme_key]->info['screenshot'];

   707             break;

   708           }

   709           $theme_key = isset($themes[$theme_key]->info['base theme']) ? $themes[$theme_key]->info['base theme'] : NULL;

   710         }

   711 

   712         $screenshot = $screenshot ? theme('image', $screenshot, t('Screenshot for %theme theme', array('%theme' => $info->name)), '', array('class' => 'screenshot'), FALSE) : t('no screenshot');

   713 

   714         $form['themes'][$info->key]['screenshot'] = array('#value' => $screenshot);

   715         $form['themes'][$info->key]['description'] = array('#type' => 'item', '#title' => $info->name, '#value' => dirname($info->filename) . ($info->name == variable_get('theme_default', 'garland') ? '<br /> <em>'. t('(site default theme)') .'</em>' : ''));

   716         $options[$info->key] = '';

   717       }

   718 

   719       $form['themes']['theme'] = array('#type' => 'radios', '#options' => $options, '#default_value' => $default_value ? $default_value : '');

   720       $form['#weight'] = $weight;

   721       return $form;

   722     }

   723   }

   724 }

   725 

   726 /**

   727  * Checks the existence of the directory specified in $form_element. This

   728  * function is called from the system_settings form to check both the

   729  * file_directory_path and file_directory_temp directories. If validation

   730  * fails, the form element is flagged with an error from within the

   731  * file_check_directory function.

   732  *

   733  * @param $form_element

   734  *   The form element containing the name of the directory to check.

   735  */

   736 function system_check_directory($form_element) {

   737   file_check_directory($form_element['#value'], FILE_CREATE_DIRECTORY, $form_element['#parents'][0]);

   738   return $form_element;

   739 }

   740 

   741 /**

   742  * Retrieves the current status of an array of files in the system table.

   743  *

   744  * @param $files

   745  *   An array of files to check.

   746  * @param $type

   747  *   The type of the files.

   748  */

   749 function system_get_files_database(&$files, $type) {

   750   // Extract current files from database.

   751   $result = db_query("SELECT filename, name, type, status, throttle, schema_version FROM {system} WHERE type = '%s'", $type);

   752   while ($file = db_fetch_object($result)) {

   753     if (isset($files[$file->name]) && is_object($files[$file->name])) {

   754       $file->old_filename = $file->filename;

   755       foreach ($file as $key => $value) {

   756         if (!isset($files[$file->name]) || !isset($files[$file->name]->$key)) {

   757           $files[$file->name]->$key = $value;

   758         }

   759       }

   760     }

   761   }

   762 }

   763 

   764 /**

   765  * Prepare defaults for themes.

   766  *

   767  * @return

   768  *   An array of default themes settings.

   769  */

   770 function system_theme_default() {

   771   return array(

   772     'regions' => array(

   773       'left' => 'Left sidebar',

   774       'right' => 'Right sidebar',

   775       'content' => 'Content',

   776       'header' => 'Header',

   777       'footer' => 'Footer',

   778     ),

   779     'description' => '',

   780     'features' => array(

   781       'comment_user_picture',

   782       'favicon',

   783       'mission',

   784       'logo',

   785       'name',

   786       'node_user_picture',

   787       'search',

   788       'slogan',

   789       'primary_links',

   790       'secondary_links',

   791     ),

   792     'stylesheets' => array(

   793       'all' => array('style.css')

   794     ),

   795     'scripts' => array('script.js'),

   796     'screenshot' => 'screenshot.png',

   797     'php' => DRUPAL_MINIMUM_PHP,

   798   );

   799 }

   800 

   801 /**

   802  * Collect data about all currently available themes.

   803  *

   804  * @return

   805  *   Array of all available themes and their data.

   806  */

   807 function system_theme_data() {

   808   // Scan the installation theme .info files and their engines.

   809   $themes = _system_theme_data();

   810 

   811   // Extract current files from database.

   812   system_get_files_database($themes, 'theme');

   813 

   814   db_query("DELETE FROM {system} WHERE type = 'theme'");

   815 

   816   foreach ($themes as $theme) {

   817     if (!isset($theme->owner)) {

   818       $theme->owner = '';

   819     }

   820 

   821     db_query("INSERT INTO {system} (name, owner, info, type, filename, status, throttle, bootstrap) VALUES ('%s', '%s', '%s', '%s', '%s', %d, %d, %d)", $theme->name, $theme->owner, serialize($theme->info), 'theme', $theme->filename, isset($theme->status) ? $theme->status : 0, 0, 0);

   822   }

   823 

   824   return $themes;

   825 }

   826 

   827 /**

   828  * Helper function to scan and collect theme .info data and their engines.

   829  *

   830  * @return

   831  *   An associative array of themes information.

   832  */

   833 function _system_theme_data() {

   834   static $themes_info = array();

   835 

   836   if (empty($themes_info)) {

   837     // Find themes

   838     $themes = drupal_system_listing('\.info$', 'themes');

   839     // Find theme engines

   840     $engines = drupal_system_listing('\.engine$', 'themes/engines');

   841 

   842     $defaults = system_theme_default();

   843 

   844     $sub_themes = array();

   845     // Read info files for each theme

   846     foreach ($themes as $key => $theme) {

   847       $themes[$key]->info = drupal_parse_info_file($theme->filename) + $defaults;

   848 

   849       // Invoke hook_system_info_alter() to give installed modules a chance to

   850       // modify the data in the .info files if necessary.

   851       drupal_alter('system_info', $themes[$key]->info, $themes[$key]);

   852 

   853       if (!empty($themes[$key]->info['base theme'])) {

   854         $sub_themes[] = $key;

   855       }

   856       if (empty($themes[$key]->info['engine'])) {

   857         $filename = dirname($themes[$key]->filename) .'/'. $themes[$key]->name .'.theme';

   858         if (file_exists($filename)) {

   859           $themes[$key]->owner = $filename;

   860           $themes[$key]->prefix = $key;

   861         }

   862       }

   863       else {

   864         $engine = $themes[$key]->info['engine'];

   865         if (isset($engines[$engine])) {

   866           $themes[$key]->owner = $engines[$engine]->filename;

   867           $themes[$key]->prefix = $engines[$engine]->name;

   868           $themes[$key]->template = TRUE;

   869         }

   870       }

   871 

   872       // Give the stylesheets proper path information.

   873       $pathed_stylesheets = array();

   874       foreach ($themes[$key]->info['stylesheets'] as $media => $stylesheets) {

   875         foreach ($stylesheets as $stylesheet) {

   876           $pathed_stylesheets[$media][$stylesheet] = dirname($themes[$key]->filename) .'/'. $stylesheet;

   877         }

   878       }

   879       $themes[$key]->info['stylesheets'] = $pathed_stylesheets;

   880 

   881       // Give the scripts proper path information.

   882       $scripts = array();

   883       foreach ($themes[$key]->info['scripts'] as $script) {

   884         $scripts[$script] = dirname($themes[$key]->filename) .'/'. $script;

   885       }

   886       $themes[$key]->info['scripts'] = $scripts;

   887       // Give the screenshot proper path information.

   888       if (!empty($themes[$key]->info['screenshot'])) {

   889         $themes[$key]->info['screenshot'] = dirname($themes[$key]->filename) .'/'. $themes[$key]->info['screenshot'];

   890       }

   891     }

   892 

   893     // Now that we've established all our master themes, go back and fill in

   894     // data for subthemes.

   895     foreach ($sub_themes as $key) {

   896       $base_key = system_find_base_theme($themes, $key);

   897       if (!$base_key) {

   898         continue;

   899       }

   900       // Copy the 'owner' and 'engine' over if the top level theme uses a

   901       // theme engine.

   902       if (isset($themes[$base_key]->owner)) {

   903         if (isset($themes[$base_key]->info['engine'])) {

   904           $themes[$key]->info['engine'] = $themes[$base_key]->info['engine'];

   905           $themes[$key]->owner = $themes[$base_key]->owner;

   906           $themes[$key]->prefix = $themes[$base_key]->prefix;

   907         }

   908         else {

   909           $themes[$key]->prefix = $key;

   910         }

   911       }

   912     }

   913 

   914     $themes_info = $themes;

   915   }

   916 

   917   return $themes_info;

   918 }

   919 

   920 /**

   921  * Recursive function to find the top level base theme. Themes can inherit

   922  * templates and function implementations from earlier themes.

   923  *

   924  * @param $themes

   925  *   An array of available themes.

   926  * @param $key

   927  *   The name of the theme whose base we are looking for.

   928  * @param $used_keys

   929  *   A recursion parameter preventing endless loops.

   930  * @return

   931  *   Returns the top level parent that has no ancestor or returns NULL if there isn't a valid parent.

   932  */

   933 function system_find_base_theme($themes, $key, $used_keys = array()) {

   934   $base_key = $themes[$key]->info['base theme'];

   935   // Does the base theme exist?

   936   if (!isset($themes[$base_key])) {

   937     return NULL;

   938   }

   939 

   940   // Is the base theme itself a child of another theme?

   941   if (isset($themes[$base_key]->info['base theme'])) {

   942     // Prevent loops.

   943     if (!empty($used_keys[$base_key])) {

   944       return NULL;

   945     }

   946     $used_keys[$base_key] = TRUE;

   947     return system_find_base_theme($themes, $base_key, $used_keys);

   948   }

   949   // If we get here, then this is our parent theme.

   950   return $base_key;

   951 }

   952 

   953 /**

   954  * Get a list of available regions from a specified theme.

   955  *

   956  * @param $theme_key

   957  *   The name of a theme.

   958  * @return

   959  *   An array of regions in the form $region['name'] = 'description'.

   960  */

   961 function system_region_list($theme_key) {

   962   static $list = array();

   963 

   964   if (!array_key_exists($theme_key, $list)) {

   965     $info = unserialize(db_result(db_query("SELECT info FROM {system} WHERE type = 'theme' AND name = '%s'", $theme_key)));

   966     $list[$theme_key] = array_map('t', $info['regions']);

   967   }

   968 

   969   return $list[$theme_key];

   970 }

   971 

   972 /**

   973  * Get the name of the default region for a given theme.

   974  *

   975  * @param $theme

   976  *   The name of a theme.

   977  * @return

   978  *   A string that is the region name.

   979  */

   980 function system_default_region($theme) {

   981   $regions = array_keys(system_region_list($theme));

   982   return isset($regions[0]) ? $regions[0] : '';

   983 }

   984 

   985 /**

   986  * Assign an initial, default set of blocks for a theme.

   987  *

   988  * This function is called the first time a new theme is enabled. The new theme

   989  * gets a copy of the default theme's blocks, with the difference that if a

   990  * particular region isn't available in the new theme, the block is assigned

   991  * to the new theme's default region.

   992  *

   993  * @param $theme

   994  *   The name of a theme.

   995  */

   996 function system_initialize_theme_blocks($theme) {

   997   // Initialize theme's blocks if none already registered.

   998   if (!(db_result(db_query("SELECT COUNT(*) FROM {blocks} WHERE theme = '%s'", $theme)))) {

   999     $default_theme = variable_get('theme_default', 'garland');

  1000     $regions = system_region_list($theme);

  1001     $result = db_query("SELECT * FROM {blocks} WHERE theme = '%s'", $default_theme);

  1002     while ($block = db_fetch_array($result)) {

  1003       // If the region isn't supported by the theme, assign the block to the theme's default region.

  1004       if (!array_key_exists($block['region'], $regions)) {

  1005         $block['region'] = system_default_region($theme);

  1006       }

  1007       db_query("INSERT INTO {blocks} (module, delta, theme, status, weight, region, visibility, pages, custom, throttle, cache) VALUES ('%s', '%s', '%s', %d, %d, '%s', %d, '%s', %d, %d, %d)",

  1008           $block['module'], $block['delta'], $theme, $block['status'], $block['weight'], $block['region'], $block['visibility'], $block['pages'], $block['custom'], $block['throttle'], $block['cache']);

  1009     }

  1010   }

  1011 }

  1012 

  1013 /**

  1014  * Add default buttons to a form and set its prefix.

  1015  *

  1016  * @ingroup forms

  1017  * @see system_settings_form_submit()

  1018  * @param $form

  1019  *   An associative array containing the structure of the form.

  1020  * @return

  1021  *   The form structure.

  1022  */

  1023 function system_settings_form($form) {

  1024   $form['buttons']['submit'] = array('#type' => 'submit', '#value' => t('Save configuration') );

  1025   $form['buttons']['reset'] = array('#type' => 'submit', '#value' => t('Reset to defaults') );

  1026 

  1027   if (!empty($_POST) && form_get_errors()) {

  1028     drupal_set_message(t('The settings have not been saved because of the errors.'), 'error');

  1029   }

  1030   $form['#submit'][] = 'system_settings_form_submit';

  1031   $form['#theme'] = 'system_settings_form';

  1032   return $form;

  1033 }

  1034 

  1035 /**

  1036  * Execute the system_settings_form.

  1037  *

  1038  * If you want node type configure style handling of your checkboxes,

  1039  * add an array_filter value to your form.

  1040  */

  1041 function system_settings_form_submit($form, &$form_state) {

  1042   $op = isset($form_state['values']['op']) ? $form_state['values']['op'] : '';

  1043 

  1044   // Exclude unnecessary elements.

  1045   unset($form_state['values']['submit'], $form_state['values']['reset'], $form_state['values']['form_id'], $form_state['values']['op'], $form_state['values']['form_token'], $form_state['values']['form_build_id']);

  1046 

  1047   foreach ($form_state['values'] as $key => $value) {

  1048     if ($op == t('Reset to defaults')) {

  1049       variable_del($key);

  1050     }

  1051     else {

  1052       if (is_array($value) && isset($form_state['values']['array_filter'])) {

  1053         $value = array_keys(array_filter($value));

  1054       }

  1055       variable_set($key, $value);

  1056     }

  1057   }

  1058   if ($op == t('Reset to defaults')) {

  1059     drupal_set_message(t('The configuration options have been reset to their default values.'));

  1060   }

  1061   else {

  1062     drupal_set_message(t('The configuration options have been saved.'));

  1063   }

  1064 

  1065   cache_clear_all();

  1066   drupal_rebuild_theme_registry();

  1067 }

  1068 

  1069 /**

  1070  * Helper function to sort requirements.

  1071  */

  1072 function _system_sort_requirements($a, $b) {

  1073   if (!isset($a['weight'])) {

  1074     if (!isset($b['weight'])) {

  1075       return strcmp($a['title'], $b['title']);

  1076     }

  1077     return -$b['weight'];

  1078   }

  1079   return isset($b['weight']) ? $a['weight'] - $b['weight'] : $a['weight'];

  1080 }

  1081 

  1082 /**

  1083  * Implementation of hook_node_type().

  1084  *

  1085  * Updates theme settings after a node type change.

  1086  */

  1087 function system_node_type($op, $info) {

  1088   if ($op == 'update' && !empty($info->old_type) && $info->type != $info->old_type) {

  1089     $old = 'toggle_node_info_'. $info->old_type;

  1090     $new = 'toggle_node_info_'. $info->type;

  1091 

  1092     $theme_settings = variable_get('theme_settings', array());

  1093     if (isset($theme_settings[$old])) {

  1094       $theme_settings[$new] = $theme_settings[$old];

  1095       unset($theme_settings[$old]);

  1096       variable_set('theme_settings', $theme_settings);

  1097     }

  1098   }

  1099 }

  1100 

  1101 /**

  1102  * Output a confirmation form

  1103  *

  1104  * This function returns a complete form for confirming an action. A link is

  1105  * offered to go back to the item that is being changed in case the user changes

  1106  * his/her mind.

  1107  *

  1108  * If the submit handler for this form is invoked, the user successfully

  1109  * confirmed the action. You should never directly inspect $_POST to see if an

  1110  * action was confirmed.

  1111  *

  1112  * @ingroup forms

  1113  * @param $form

  1114  *   Additional elements to inject into the form, for example hidden elements.

  1115  * @param $question

  1116  *   The question to ask the user (e.g. "Are you sure you want to delete the

  1117  *   block <em>foo</em>?").

  1118  * @param $path

  1119  *   The page to go to if the user denies the action.

  1120  *   Can be either a drupal path, or an array with the keys 'path', 'query', 'fragment'.

  1121  * @param $description

  1122  *   Additional text to display (defaults to "This action cannot be undone.").

  1123  * @param $yes

  1124  *   A caption for the button which confirms the action (e.g. "Delete",

  1125  *   "Replace", ...).

  1126  * @param $no

  1127  *   A caption for the link which denies the action (e.g. "Cancel").

  1128  * @param $name

  1129  *   The internal name used to refer to the confirmation item.

  1130  * @return

  1131  *   The form.

  1132  */

  1133 function confirm_form($form, $question, $path, $description = NULL, $yes = NULL, $no = NULL, $name = 'confirm') {

  1134   $description = isset($description) ? $description : t('This action cannot be undone.');

  1135