<?php

/**

 * @file

 * Administrative page callbacks for menu module.

 */

/**

 * Menu callback which shows an overview page of all the custom menus and their descriptions.

 */

function menu_overview_page() {

  $result = db_query("SELECT * FROM {menu_custom} ORDER BY title", array(), array('fetch' => PDO::FETCH_ASSOC));

  $header = array(t('Title'), array('data' => t('Operations'), 'colspan' => '3'));

  $rows = array();

  foreach ($result as $menu) {

    $row = array(theme('menu_admin_overview', array('title' => $menu['title'], 'name' => $menu['menu_name'], 'description' => $menu['description'])));

    $row[] = array('data' => l(t('list links'), 'admin/structure/menu/manage/' . $menu['menu_name']));

    $row[] = array('data' => l(t('edit menu'), 'admin/structure/menu/manage/' . $menu['menu_name'] . '/edit'));

    $row[] = array('data' => l(t('add link'), 'admin/structure/menu/manage/' . $menu['menu_name'] . '/add'));

    $rows[] = $row;

  }

  return theme('table', array('header' => $header, 'rows' => $rows));

}

/**

 * Returns HTML for a menu title and description for the menu overview page.

 *

 * @param $variables

 *   An associative array containing:

 *   - title: The menu's title.

 *   - description: The menu's description.

 *

 * @ingroup themeable

 */

function theme_menu_admin_overview($variables) {

  $output = check_plain($variables['title']);

  $output .= '<div class="description">' . filter_xss_admin($variables['description']) . '</div>';

  return $output;

}

/**

 * Form for editing an entire menu tree at once.

 *

 * Shows for one menu the menu links accessible to the current user and

 * relevant operations.

 */

function menu_overview_form($form, &$form_state, $menu) {

  global $menu_admin;

  $form['#attached']['css'] = array(drupal_get_path('module', 'menu') . '/menu.css');

  $sql = "

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

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

    WHERE ml.menu_name = :menu

    ORDER BY p1 ASC, p2 ASC, p3 ASC, p4 ASC, p5 ASC, p6 ASC, p7 ASC, p8 ASC, p9 ASC";

  $result = db_query($sql, array(':menu' => $menu['menu_name']), array('fetch' => PDO::FETCH_ASSOC));

  $links = array();

  foreach ($result as $item) {

    $links[] = $item;

  }

  $tree = menu_tree_data($links);

  $node_links = array();

  menu_tree_collect_node_links($tree, $node_links);

  // We indicate that a menu administrator is running the menu access check.

  $menu_admin = TRUE;

  menu_tree_check_access($tree, $node_links);

  $menu_admin = FALSE;

  $form = array_merge($form, _menu_overview_tree_form($tree));

  $form['#menu'] =  $menu;

  if (element_children($form)) {

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

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

      '#type' => 'submit',

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

    );

  }

  else {

    $form['#empty_text'] = t('There are no menu links yet. <a href="@link">Add link</a>.', array('@link' => url('admin/structure/menu/manage/'. $form['#menu']['menu_name'] .'/add')));

  }

  return $form;

}

/**

 * Recursive helper function for menu_overview_form().

 *

 * @param $tree

 *   The menu_tree retrieved by menu_tree_data.

 */

function _menu_overview_tree_form($tree) {

  $form = &drupal_static(__FUNCTION__, array('#tree' => TRUE));

  foreach ($tree as $data) {

    $title = '';

    $item = $data['link'];

    // Don't show callbacks; these have $item['hidden'] < 0.

    if ($item && $item['hidden'] >= 0) {

      $mlid = 'mlid:' . $item['mlid'];

      $form[$mlid]['#item'] = $item;

      $form[$mlid]['#attributes'] = $item['hidden'] ? array('class' => array('menu-disabled')) : array('class' => array('menu-enabled'));

      $form[$mlid]['title']['#markup'] = l($item['title'], $item['href'], $item['localized_options']);

      if ($item['hidden']) {

        $form[$mlid]['title']['#markup'] .= ' (' . t('disabled') . ')';

      }

      elseif ($item['link_path'] == 'user' && $item['module'] == 'system') {

        $form[$mlid]['title']['#markup'] .= ' (' . t('logged in users only') . ')';

      }

      $form[$mlid]['hidden'] = array(

        '#type' => 'checkbox',

        '#title' => t('Enable @title menu link', array('@title' => $item['title'])),

        '#title_display' => 'invisible',

        '#default_value' => !$item['hidden'],

      );

      $form[$mlid]['weight'] = array(

        '#type' => 'weight',

        '#delta' => 50,

        '#default_value' => $item['weight'],

        '#title_display' => 'invisible',

        '#title' => t('Weight for @title', array('@title' => $item['title'])),

      );

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

        '#type' => 'hidden',

        '#value' => $item['mlid'],

      );

      $form[$mlid]['plid'] = array(

        '#type' => 'hidden',

        '#default_value' => $item['plid'],

      );

      // Build a list of operations.

      $operations = array();

      $operations['edit'] = array('#type' => 'link', '#title' => t('edit'), '#href' => 'admin/structure/menu/item/' . $item['mlid'] . '/edit');

      // Only items created by the menu module can be deleted.

      if ($item['module'] == 'menu' || $item['updated'] == 1) {

        $operations['delete'] = array('#type' => 'link', '#title' => t('delete'), '#href' => 'admin/structure/menu/item/' . $item['mlid'] . '/delete');

      }

      // Set the reset column.

      elseif ($item['module'] == 'system' && $item['customized']) {

        $operations['reset'] = array('#type' => 'link', '#title' => t('reset'), '#href' => 'admin/structure/menu/item/' . $item['mlid'] . '/reset');

      }

      $form[$mlid]['operations'] = $operations;

    }

    if ($data['below']) {

      _menu_overview_tree_form($data['below']);

    }

  }

  return $form;

}

/**

 * Submit handler for the menu overview form.

 *

 * This function takes great care in saving parent items first, then items

 * underneath them. Saving items in the incorrect order can break the menu tree.

 *

 * @see menu_overview_form()

 */

function menu_overview_form_submit($form, &$form_state) {

  // When dealing with saving menu items, the order in which these items are

  // saved is critical. If a changed child item is saved before its parent,

  // the child item could be saved with an invalid path past its immediate

  // parent. To prevent this, save items in the form in the same order they

  // are sent by $_POST, ensuring parents are saved first, then their children.

  // See http://drupal.org/node/181126#comment-632270

  $order = array_flip(array_keys($form_state['input'])); // Get the $_POST order.

  $form = array_merge($order, $form); // Update our original form with the new order.

  $updated_items = array();

  $fields = array('weight', 'plid');

  foreach (element_children($form) as $mlid) {

    if (isset($form[$mlid]['#item'])) {

      $element = $form[$mlid];

      // Update any fields that have changed in this menu item.

      foreach ($fields as $field) {

        if ($element[$field]['#value'] != $element[$field]['#default_value']) {

          $element['#item'][$field] = $element[$field]['#value'];

          $updated_items[$mlid] = $element['#item'];

        }

      }

      // Hidden is a special case, the value needs to be reversed.

      if ($element['hidden']['#value'] != $element['hidden']['#default_value']) {

        // Convert to integer rather than boolean due to PDO cast to string.

        $element['#item']['hidden'] = $element['hidden']['#value'] ? 0 : 1;

        $updated_items[$mlid] = $element['#item'];

      }

    }

  }

  // Save all our changed items to the database.

  foreach ($updated_items as $item) {

    $item['customized'] = 1;

    menu_link_save($item);

  }

  drupal_set_message(t('Your configuration has been saved.'));

}

/**

 * Returns HTML for the menu overview form into a table.

 *

 * @param $variables

 *   An associative array containing:

 *   - form: A render element representing the form.

 *

 * @ingroup themeable

 */

function theme_menu_overview_form($variables) {

  $form = $variables['form'];

  drupal_add_tabledrag('menu-overview', 'match', 'parent', 'menu-plid', 'menu-plid', 'menu-mlid', TRUE, MENU_MAX_DEPTH - 1);

  drupal_add_tabledrag('menu-overview', 'order', 'sibling', 'menu-weight');

  $header = array(

    t('Menu link'),

    array('data' => t('Enabled'), 'class' => array('checkbox')),

    t('Weight'),

    array('data' => t('Operations'), 'colspan' => '3'),

  );

  $rows = array();

  foreach (element_children($form) as $mlid) {

    if (isset($form[$mlid]['hidden'])) {

      $element = &$form[$mlid];

      // Build a list of operations.

      $operations = array();

      foreach (element_children($element['operations']) as $op) {

        $operations[] = array('data' => drupal_render($element['operations'][$op]), 'class' => array('menu-operations'));

      }

      while (count($operations) < 2) {

        $operations[] = '';

      }

      // Add special classes to be used for tabledrag.js.

      $element['plid']['#attributes']['class'] = array('menu-plid');

      $element['mlid']['#attributes']['class'] = array('menu-mlid');

      $element['weight']['#attributes']['class'] = array('menu-weight');

      // Change the parent field to a hidden. This allows any value but hides the field.

      $element['plid']['#type'] = 'hidden';

      $row = array();

      $row[] = theme('indentation', array('size' => $element['#item']['depth'] - 1)) . drupal_render($element['title']);

      $row[] = array('data' => drupal_render($element['hidden']), 'class' => array('checkbox', 'menu-enabled'));

      $row[] = drupal_render($element['weight']) . drupal_render($element['plid']) . drupal_render($element['mlid']);

      $row = array_merge($row, $operations);

      $row = array_merge(array('data' => $row), $element['#attributes']);

      $row['class'][] = 'draggable';

      $rows[] = $row;

    }

  }

  $output = '';

  if (empty($rows)) {

    $rows[] = array(array('data' => $form['#empty_text'], 'colspan' => '7'));

  }

  $output .= theme('table', array('header' => $header, 'rows' => $rows, 'attributes' => array('id' => 'menu-overview')));

  $output .= drupal_render_children($form);

  return $output;

}

/**

 * Menu callback; Build the menu link editing form.

 */

function menu_edit_item($form, &$form_state, $type, $item, $menu) {

  if ($type == 'add' || empty($item)) {

    // This is an add form, initialize the menu link.

    $item = array('link_title' => '', 'mlid' => 0, 'plid' => 0, 'menu_name' => $menu['menu_name'], 'weight' => 0, 'link_path' => '', 'options' => array(), 'module' => 'menu', 'expanded' => 0, 'hidden' => 0, 'has_children' => 0);

  }

  else {

    // Get the human-readable menu title from the given menu name.

    $titles = menu_get_menus();

    $current_title = $titles[$item['menu_name']];

    // Get the current breadcrumb and add a link to that menu's overview page.

    $breadcrumb = menu_get_active_breadcrumb();

    $breadcrumb[] = l($current_title, 'admin/structure/menu/manage/' . $item['menu_name']);

    drupal_set_breadcrumb($breadcrumb);

  }

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

  $form['link_title'] = array(

    '#type' => 'textfield',

    '#title' => t('Menu link title'),

    '#maxlength' => 255,

    '#default_value' => $item['link_title'],

    '#description' => t('The text to be used for this link in the menu.'),

    '#required' => TRUE,

  );

  foreach (array('link_path', 'mlid', 'module', 'has_children', 'options') as $key) {

    $form[$key] = array('#type' => 'value', '#value' => $item[$key]);

  }

  // Any item created or edited via this interface is considered "customized".

  $form['customized'] = array('#type' => 'value', '#value' => 1);

  $form['original_item'] = array('#type' => 'value', '#value' => $item);

  $path = $item['link_path'];

  if (isset($item['options']['query'])) {

    $path .= '?' . drupal_http_build_query($item['options']['query']);

  }

  if (isset($item['options']['fragment'])) {

    $path .= '#' . $item['options']['fragment'];

  }

  if ($item['module'] == 'menu') {

    $form['link_path'] = array(

      '#type' => 'textfield',

      '#title' => t('Path'),

      '#maxlength' => 255,

      '#default_value' => $path,

      '#description' => t('The path for this menu link. This can be an internal path such as %add-node or an external URL such as %example. Enter %front to link to the front page.', array('%front' => '<front>', '%add-node' => 'node/add', '%example' => 'http://example.com')),

      '#required' => TRUE,

    );

    $form['actions']['delete'] = array(

      '#type' => 'submit',

      '#value' => t('Delete'),

      '#access' => $item['mlid'],

      '#submit' => array('menu_item_delete_submit'),

      '#weight' => 10,

    );

  }

  else {

    $form['_path'] = array(

      '#type' => 'item',

      '#title' => t('Path'),

      '#description' => l($item['link_title'], $item['href'], $item['options']),

    );

  }

  $form['description'] = array(

    '#type' => 'textarea',

    '#title' => t('Description'),

    '#default_value' => isset($item['options']['attributes']['title']) ? $item['options']['attributes']['title'] : '',

    '#rows' => 1,

    '#description' => t('Shown when hovering over the menu link.'),

  );

  $form['enabled'] = array(

    '#type' => 'checkbox',

    '#title' => t('Enabled'),

    '#default_value' => !$item['hidden'],

    '#description' => t('Menu links that are not enabled will not be listed in any menu.'),

  );

  $form['expanded'] = array(

    '#type' => 'checkbox',

    '#title' => t('Show as expanded'),

    '#default_value' => $item['expanded'],

    '#description' => t('If selected and this menu link has children, the menu will always appear expanded.'),

  );

  // Generate a list of possible parents (not including this link or descendants).

  $options = menu_parent_options(menu_get_menus(), $item);

  $default = $item['menu_name'] . ':' . $item['plid'];

  if (!isset($options[$default])) {

    $default = 'navigation:0';

  }

  $form['parent'] = array(

    '#type' => 'select',

    '#title' => t('Parent link'),

    '#default_value' => $default,

    '#options' => $options,

    '#description' => t('The maximum depth for a link and all its children is fixed at !maxdepth. Some menu links may not be available as parents if selecting them would exceed this limit.', array('!maxdepth' => MENU_MAX_DEPTH)),

    '#attributes' => array('class' => array('menu-title-select')),

  );

  $form['weight'] = array(

    '#type' => 'weight',

    '#title' => t('Weight'),

    '#delta' => 50,

    '#default_value' => $item['weight'],

    '#description' => t('Optional. In the menu, the heavier links will sink and the lighter links will be positioned nearer the top.'),

  );

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

  return $form;

}

/**

 * Validate form values for a menu link being added or edited.

 */

function menu_edit_item_validate($form, &$form_state) {

  $item = &$form_state['values'];

  $normal_path = drupal_get_normal_path($item['link_path']);

  if ($item['link_path'] != $normal_path) {

    drupal_set_message(t('The menu system stores system paths only, but will use the URL alias for display. %link_path has been stored as %normal_path', array('%link_path' => $item['link_path'], '%normal_path' => $normal_path)));

    $item['link_path'] = $normal_path;