<?php

/**

 * @file

 * Admin page callbacks for the system module.

 */

/**

 * Menu callback; Provide the administration overview page.

 */

function system_admin_config_page() {

  // Check for status report errors.

  if (system_status(TRUE) && user_access('administer site configuration')) {

    drupal_set_message(t('One or more problems were detected with your Drupal installation. Check the <a href="@status">status report</a> for more information.', array('@status' => url('admin/reports/status'))), 'error');

  }

  $blocks = array();

  if ($admin = db_query("SELECT menu_name, mlid FROM {menu_links} WHERE link_path = 'admin/config' AND module = 'system'")->fetchAssoc()) {

    $result = db_query("

      SELECT m.*, ml.*

      FROM {menu_links} ml

      INNER JOIN {menu_router} m ON ml.router_path = m.path

      WHERE ml.link_path <> 'admin/help' AND menu_name = :menu_name AND ml.plid = :mlid AND hidden = 0", $admin, array('fetch' => PDO::FETCH_ASSOC));

    foreach ($result as $item) {

      _menu_link_translate($item);

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

        continue;

      }

      // The link description, either derived from 'description' in hook_menu()

      // or customized via menu module is used as title attribute.

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

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

        unset($item['localized_options']['attributes']['title']);

      }

      $block = $item;

      $block['content'] = '';

      $block['content'] .= theme('admin_block_content', array('content' => system_admin_menu_block($item)));

      if (!empty($block['content'])) {

        $block['show'] = TRUE;

      }

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

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

      $blocks[(50000 + $item['weight']) . ' ' . $item['title'] . ' ' . $item['mlid']] = $block;

    }

  }

  if ($blocks) {

    ksort($blocks);

    return theme('admin_page', array('blocks' => $blocks));

  }

  else {

    return t('You do not have any administrative items.');

  }

}

/**

 * Provide a single block from the administration menu as a page.

 *

 * This function is often a destination for these blocks.

 * For example, 'admin/structure/types' needs to have a destination to be valid

 * in the Drupal menu system, but too much information there might be

 * hidden, so we supply the contents of the block.

 *

 * @return

 *   The output HTML.

 */

function system_admin_menu_block_page() {

  $item = menu_get_item();

  if ($content = system_admin_menu_block($item)) {

    $output = theme('admin_block_content', array('content' => $content));

  }

  else {

    $output = t('You do not have any administrative items.');

  }

  return $output;

}

/**

 * Menu callback; prints a listing of admin tasks, organized by module.

 */

function system_admin_index() {

  $module_info = system_get_info('module');

  foreach ($module_info as $module => $info) {

    $module_info[$module] = new stdClass();

    $module_info[$module]->info = $info;

  }

  uasort($module_info, 'system_sort_modules_by_info_name');

  $menu_items = array();

  foreach ($module_info as $module => $info) {

    // Only display a section if there are any available tasks.

    if ($admin_tasks = system_get_module_admin_tasks($module, $info->info)) {

      // Sort links by title.

      uasort($admin_tasks, 'drupal_sort_title');

      // Move 'Configure permissions' links to the bottom of each section.

      $permission_key = "admin/people/permissions#module-$module";

      if (isset($admin_tasks[$permission_key])) {

        $permission_task = $admin_tasks[$permission_key];

        unset($admin_tasks[$permission_key]);

        $admin_tasks[$permission_key] = $permission_task;

      }

      $menu_items[$info->info['name']] = array($info->info['description'], $admin_tasks);

    }

  }

  return theme('system_admin_index', array('menu_items' => $menu_items));

}

/**

 * Displays the configuration overview page.

 *

 * This menu callback implementation is a legacy function that used to display

 * the configuration overview page at admin/config. It is currently unused and

 * will be removed in Drupal 8. The page at admin/config is now generated by

 * system_admin_config_page().

 *

 * @deprecated

 * @see system_admin_config_page()

 */

function system_settings_overview() {

  // Check database setup if necessary

  if (function_exists('db_check_setup') && empty($_POST)) {

    db_check_setup();

  }

  $item = menu_get_item('admin/config');

  $content = system_admin_menu_block($item);

  $output = theme('admin_block_content', array('content' => $content));

  return $output;

}

/**

 * Menu callback; displays a listing of all themes.

 */

function system_themes_page() {

  // Get current list of themes.

  $themes = system_rebuild_theme_data();

  uasort($themes, 'system_sort_modules_by_info_name');

  $theme_default = variable_get('theme_default', 'bartik');

  $theme_groups  = array();

  foreach ($themes as &$theme) {

    if (!empty($theme->info['hidden'])) {

      continue;

    }

    $admin_theme_options[$theme->name] = $theme->info['name'];

    $theme->is_default = ($theme->name == $theme_default);

    // Identify theme screenshot.

    $theme->screenshot = NULL;

    // Create a list which includes the current theme and all its base themes.

    if (isset($themes[$theme->name]->base_themes)) {

      $theme_keys = array_keys($themes[$theme->name]->base_themes);

      $theme_keys[] = $theme->name;

    }

    else {

      $theme_keys = array($theme->name);

    }

    // Look for a screenshot in the current theme or in its closest ancestor.

    foreach (array_reverse($theme_keys) as $theme_key) {

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

        $theme->screenshot = array(

          'path' => $themes[$theme_key]->info['screenshot'],

          'alt' => t('Screenshot for !theme theme', array('!theme' => $theme->info['name'])),

          'title' => t('Screenshot for !theme theme', array('!theme' => $theme->info['name'])),

          'attributes' => array('class' => array('screenshot')),

        );

        break;

      }

    }

    if (empty($theme->status)) {

     // Ensure this theme is compatible with this version of core.

     // Require the 'content' region to make sure the main page

     // content has a common place in all themes.

      $theme->incompatible_core = !isset($theme->info['core']) || ($theme->info['core'] != DRUPAL_CORE_COMPATIBILITY) || (!isset($theme->info['regions']['content']));

      $theme->incompatible_php = version_compare(phpversion(), $theme->info['php']) < 0;

    }

    $query['token'] = drupal_get_token('system-theme-operation-link');

    $theme->operations = array();

    if (!empty($theme->status) || !$theme->incompatible_core && !$theme->incompatible_php) {

      // Create the operations links.

      $query['theme'] = $theme->name;

      if (drupal_theme_access($theme)) {

        $theme->operations[] = array(

          'title' => t('Settings'),

          'href' => 'admin/appearance/settings/' . $theme->name,

          'attributes' => array('title' => t('Settings for !theme theme', array('!theme' => $theme->info['name']))),

        );

      }

      if (!empty($theme->status)) {

        if (!$theme->is_default) {

          $theme->operations[] = array(

            'title' => t('Disable'),

            'href' => 'admin/appearance/disable',

            'query' => $query,

            'attributes' => array('title' => t('Disable !theme theme', array('!theme' => $theme->info['name']))),

          );

          $theme->operations[] = array(

            'title' => t('Set default'),

            'href' => 'admin/appearance/default',

            'query' => $query,

            'attributes' => array('title' => t('Set !theme as default theme', array('!theme' => $theme->info['name']))),

          );

        }

      }

      else {

        $theme->operations[] = array(

          'title' => t('Enable'),

          'href' => 'admin/appearance/enable',

          'query' => $query,

          'attributes' => array('title' => t('Enable !theme theme', array('!theme' => $theme->info['name']))),

        );

        $theme->operations[] = array(

          'title' => t('Enable and set default'),

          'href' => 'admin/appearance/default',

          'query' => $query,

          'attributes' => array('title' => t('Enable !theme as default theme', array('!theme' => $theme->info['name']))),

        );

      }

    }

    // Add notes to default and administration theme.

    $theme->notes = array();

    $theme->classes = array();

    if ($theme->is_default) {

      $theme->classes[] = 'theme-default';

      $theme->notes[] = t('default theme');

    }

    // Sort enabled and disabled themes into their own groups.

    $theme_groups[$theme->status ? 'enabled' : 'disabled'][] = $theme;

  }

  // There are two possible theme groups.

  $theme_group_titles = array(

    'enabled' => format_plural(count($theme_groups['enabled']), 'Enabled theme', 'Enabled themes'),

  );

  if (!empty($theme_groups['disabled'])) {

    $theme_group_titles['disabled'] = format_plural(count($theme_groups['disabled']), 'Disabled theme', 'Disabled themes');

  }

  uasort($theme_groups['enabled'], 'system_sort_themes');

  drupal_alter('system_themes_page', $theme_groups);

  $admin_form = drupal_get_form('system_themes_admin_form', $admin_theme_options);

  return theme('system_themes_page', array('theme_groups' => $theme_groups, 'theme_group_titles' => $theme_group_titles)) . drupal_render($admin_form);

}

/**

 * Form to select the administration theme.

 *

 * @ingroup forms

 * @see system_themes_admin_form_submit()

 */

function system_themes_admin_form($form, &$form_state, $theme_options) {

  // Administration theme settings.

  $form['admin_theme'] = array(

    '#type' => 'fieldset',

    '#title' => t('Administration theme'),

  );

  $form['admin_theme']['admin_theme'] = array(

    '#type' => 'select',

    '#options' => array(0 => t('Default theme')) + $theme_options,

    '#title' => t('Administration theme'),

    '#description' => t('Choose "Default theme" to always use the same theme as the rest of the site.'),

    '#default_value' => variable_get('admin_theme', 0),

  );

  $form['admin_theme']['node_admin_theme'] = array(

    '#type' => 'checkbox',

    '#title' => t('Use the administration theme when editing or creating content'),

    '#default_value' => variable_get('node_admin_theme', '0'),

  );

  $form['admin_theme']['actions'] = array('#type' => 'actions');

  $form['admin_theme']['actions']['submit'] = array(

    '#type' => 'submit',

    '#value' => t('Save configuration'),

  );

  return $form;

}

/**

 * Process system_themes_admin_form form submissions.

 */

function system_themes_admin_form_submit($form, &$form_state) {

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

  variable_set('admin_theme', $form_state['values']['admin_theme']);

  variable_set('node_admin_theme', $form_state['values']['node_admin_theme']);

}

/**

 * Menu callback; Enables a theme.

 */

function system_theme_enable() {

  if (isset($_REQUEST['theme']) && isset($_REQUEST['token']) && drupal_valid_token($_REQUEST['token'], 'system-theme-operation-link')) {

    $theme = $_REQUEST['theme'];

    // Get current list of themes.

    $themes = list_themes();

    // Check if the specified theme is one recognized by the system.

    if (!empty($themes[$theme])) {

      theme_enable(array($theme));

      drupal_set_message(t('The %theme theme has been enabled.', array('%theme' => $themes[$theme]->info['name'])));

    }

    else {

      drupal_set_message(t('The %theme theme was not found.', array('%theme' => $theme)), 'error');

    }

    drupal_goto('admin/appearance');

  }

  return MENU_ACCESS_DENIED;

}

/**

 * Menu callback; Disables a theme.

 */

function system_theme_disable() {

  if (isset($_REQUEST['theme']) && isset($_REQUEST['token']) && drupal_valid_token($_REQUEST['token'], 'system-theme-operation-link')) {

    $theme = $_REQUEST['theme'];

    // Get current list of themes.

    $themes = list_themes();

    // Check if the specified theme is one recognized by the system.

    if (!empty($themes[$theme])) {

      if ($theme == variable_get('theme_default', 'bartik')) {

        // Don't disable the default theme.

        drupal_set_message(t('%theme is the default theme and cannot be disabled.', array('%theme' => $themes[$theme]->info['name'])), 'error');

      }

      else {

        theme_disable(array($theme));

        drupal_set_message(t('The %theme theme has been disabled.', array('%theme' => $themes[$theme]->info['name'])));

      }

    }

    else {

      drupal_set_message(t('The %theme theme was not found.', array('%theme' => $theme)), 'error');

    }

    drupal_goto('admin/appearance');

  }

  return MENU_ACCESS_DENIED;

}

/**

 * Menu callback; Set the default theme.

 */

function system_theme_default() {

  if (isset($_REQUEST['theme']) && isset($_REQUEST['token']) && drupal_valid_token($_REQUEST['token'], 'system-theme-operation-link')) {

    $theme = $_REQUEST['theme'];

    // Get current list of themes.

    $themes = list_themes();

    // Check if the specified theme is one recognized by the system.

    if (!empty($themes[$theme])) {

      // Enable the theme if it is currently disabled.

      if (empty($themes[$theme]->status)) {

       theme_enable(array($theme));

      }

      // Set the default theme.

      variable_set('theme_default', $theme);

      // Rebuild the menu. This duplicates the menu_rebuild() in theme_enable().

      // However, modules must know the current default theme in order to use

      // this information in hook_menu() or hook_menu_alter() implementations,

      // and doing the variable_set() before the theme_enable() could result

      // in a race condition where the theme is default but not enabled.

      menu_rebuild();

      // The status message depends on whether an admin theme is currently in use:

      // a value of 0 means the admin theme is set to be the default theme.

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

      if ($admin_theme != 0 && $admin_theme != $theme) {

        drupal_set_message(t('Please note that the administration theme is still set to the %admin_theme theme; consequently, the theme on this page remains unchanged. All non-administrative sections of the site, however, will show the selected %selected_theme theme by default.', array(

          '%admin_theme' => $themes[$admin_theme]->info['name'],

          '%selected_theme' => $themes[$theme]->info['name'],

        )));

      }

      else {

        drupal_set_message(t('%theme is now the default theme.', array('%theme' => $themes[$theme]->info['name'])));

      }

    }

    else {

      drupal_set_message(t('The %theme theme was not found.', array('%theme' => $theme)), 'error');

    }

    drupal_goto('admin/appearance');

  }

  return MENU_ACCESS_DENIED;

}

/**

 * Form builder; display theme configuration for entire site and individual themes.

 *

 * @param $key

 *   A theme name.

 * @return

 *   The form structure.

 * @ingroup forms

 * @see system_theme_settings_submit()

 */

function system_theme_settings($form, &$form_state, $key = '') {

  // Default settings are defined in theme_get_setting() in includes/theme.inc

  if ($key) {

    $var = 'theme_' . $key . '_settings';

    $themes = list_themes();

    $features = $themes[$key]->info['features'];

  }

  else {

    $var = 'theme_settings';

  }

  $form['var'] = array('#type' => 'hidden', '#value' => $var);

  // Toggle settings

  $toggles = array(

    'logo'                      => t('Logo'),

    'name'                      => t('Site name'),

    'slogan'                    => t('Site slogan'),

    'node_user_picture'         => t('User pictures in posts'),

    'comment_user_picture'      => t('User pictures in comments'),

    'comment_user_verification' => t('User verification status in comments'),

    'favicon'                   => t('Shortcut icon'),

    'main_menu'                 => t('Main menu'),

    'secondary_menu'            => t('Secondary menu'),

  );

  // Some features are not always available

  $disabled = array();

  if (!variable_get('user_pictures', 0)) {

    $disabled['toggle_node_user_picture'] = TRUE;

    $disabled['toggle_comment_user_picture'] = TRUE;

  }

  if (!module_exists('comment')) {

    $disabled['toggle_comment_user_picture'] = TRUE;

    $disabled['toggle_comment_user_verification'] = TRUE;

  }

  $form['theme_settings'] = array(

    '#type' => 'fieldset',

    '#title' => t('Toggle display'),

    '#description' => t('Enable or disable the display of certain page elements.'),

  );

  foreach ($toggles as $name => $title) {

    if ((!$key) || in_array($name, $features)) {

      $form['theme_settings']['toggle_' . $name] = array('#type' => 'checkbox', '#title' => $title, '#default_value' => theme_get_setting('toggle_' . $name, $key));

      // Disable checkboxes for features not supported in the current configuration.

      if (isset($disabled['toggle_' . $name])) {

        $form['theme_settings']['toggle_' . $name]['#disabled'] = TRUE;

      }

    }

  }

  if (!element_children($form['theme_settings'])) {

    // If there is no element in the theme settings fieldset then do not show

    // it -- but keep it in the form if another module wants to alter.

    $form['theme_settings']['#access'] = FALSE;

  }

  // Logo settings

  if ((!$key) || in_array('logo', $features)) {

    $form['logo'] = array(

      '#type' => 'fieldset',

      '#title' => t('Logo image settings'),

      '#description' => t('If toggled on, the following logo will be displayed.'),

      '#attributes' => array('class' => array('theme-settings-bottom')),

    );

    $form['logo']['default_logo'] = array(

      '#type' => 'checkbox',

      '#title' => t('Use the default logo'),

      '#default_value' => theme_get_setting('default_logo', $key),

      '#tree' => FALSE,

      '#description' => t('Check here if you want the theme to use the logo supplied with it.')

    );

    $form['logo']['settings'] = array(

      '#type' => 'container',

      '#states' => array(

        // Hide the logo settings when using the default logo.

        'invisible' => array(

          'input[name="default_logo"]' => array('checked' => TRUE),

        ),

      ),

    );

    $form['logo']['settings']['logo_path'] = array(

      '#type' => 'textfield',

      '#title' => t('Path to custom logo'),

      '#description' => t('The path to the file you would like to use as your logo file instead of the default logo.'),

      '#default_value' => theme_get_setting('logo_path', $key),

    );

    $form['logo']['settings']['logo_upload'] = array(

      '#type' => 'file',

      '#title' => t('Upload logo image'),

      '#maxlength' => 40,

      '#description' => t("If you don't have direct file access to the server, use this field to upload your logo.")

    );

  }

  if ((!$key) || in_array('favicon', $features)) {

    $form['favicon'] = array(

      '#type' => 'fieldset',

      '#title' => t('Shortcut icon settings'),

      '#description' => t("Your shortcut icon, or 'favicon', is displayed in the address bar and bookmarks of most browsers."),

    );

    $form['favicon']['default_favicon'] = array(

      '#type' => 'checkbox',

      '#title' => t('Use the default shortcut icon.'),

      '#default_value' => theme_get_setting('default_favicon', $key),

      '#description' => t('Check here if you want the theme to use the default shortcut icon.')

    );

    $form['favicon']['settings'] = array(

      '#type' => 'container',

      '#states' => array(

        // Hide the favicon settings when using the default favicon.

        'invisible' => array(

          'input[name="default_favicon"]' => array('checked' => TRUE),

        ),

      ),

    );

    $form['favicon']['settings']['favicon_path'] = array(

      '#type' => 'textfield',

      '#title' => t('Path to custom icon'),

      '#description' => t('The path to the image file you would like to use as your custom shortcut icon.'),

      '#default_value' => theme_get_setting('favicon_path', $key),

    );

    $form['favicon']['settings']['favicon_upload'] = array(

      '#type' => 'file',

      '#title' => t('Upload icon image'),

      '#description' => t("If you don't have direct file access to the server, use this field to upload your shortcut icon.")

    );

  }

  // Inject human-friendly values for logo and favicon.