<?php
// $Id: gallery_menu.module,v 1.1.2.23 2008-07-17 21:21:44 profix898 Exp $

/**
 * gallery_menu.module
 */

/**
 * Implementation of hook_enable().
 */
function gallery_menu_enable() {
  cache_clear_all('gallery:menu', 'cache', TRUE);
}

/**
 * Implementation of hook_menu().
 */
function gallery_menu_menu($may_cache) {
  $items = array();
  if (variable_get('gallery_valid', 0)) {
    if ($may_cache) {
      $items[] = array(
        'path' => 'admin/settings/gallery/menu',
        'title' => t('Menu'),
        'callback' => 'drupal_get_form',
        'callback arguments' => '_gallery_menu_settings',
        'access' => user_access('administer gallery settings'),
        'type' => MENU_LOCAL_TASK,
        'weight' => 6
      );
    }
    else {
      // Rebuild the menu if the G2 album structure changed
      $timestamp = variable_get('gallery_menu_timestamp', 0);
      $query = 'SELECT COUNT([GalleryEntity::id]) FROM [GalleryEntity], [GalleryAlbumItem] WHERE
                [GalleryAlbumItem::id] = [GalleryEntity::id] AND [GalleryEntity::modificationTimeStamp] > ?';
    	if (($results = gallery_db_query($query, array($timestamp))) && $results[0]) {
        cache_clear_all('gallery:menu', 'cache', TRUE);
        variable_set('gallery_menu_timestamp', time());
      }
      // Insert the menu items
      if (user_access('access gallery')) {
        $items = gallery_menu_build_menu();
      }
    }
  }

  return $items;
}

/**
 * Function gallery_menu_page().
 */
function gallery_menu_page($result) {
  // Generate the path to set the active menu item
  if (isset($result['themeData']['item'])) {
    switch ($result['themeData']['item']['entityType']) {
      case 'GalleryAlbumItem':
        $id = $result['themeData']['item']['id'];
        break;
      case 'GalleryDynamicAlbum':
        $id = $result['themeData']['pageUrl']['albumId'];
        break;
      default:
        $id = $result['themeData']['item']['parentId'];
    }
    if (!empty($id)) {
      $url_generator =& $GLOBALS['gallery']->getUrlGenerator();
      if (isset($url_generator->_shortUrls) && variable_get('gallery_menu_rewrite', 0)) {
        $path = _gallery_menu_album_path($id);
      }
      else {
        list($ret, $parents) = GalleryCoreApi::fetchParentSequence($id);
        if ($ret) {
          gallery_error(t('Error fetching item parents'), $ret);
        }
        else {
          array_shift($parents);
          $path = 'gallery/'. (count($parents) ? implode('/', $parents) .'/' : '') . $id;
        }
      }
    }
    list($ret, $root) = GalleryCoreApi::getDefaultAlbumId();
    if ($ret) {
      gallery_error(t('Error calling getDefaultAlbumId()'), $ret);
    }
    menu_set_active_item(($id == $root) ? 'gallery' : $path);
  }
}

/**
 * Function gallery_menu_album().
 */
function gallery_menu_album($id) {
  // Redirect to true album url (from the virtual menu path)
  $url = gallery_generate_url(array('itemId' => $id), FALSE);
  drupal_goto($url);
}

/**
 * Function gallery_menu_build_menu().
 */
function gallery_menu_build_menu() {
  global $user;
  $items = array();
  
  $cid = 'gallery:menu:'. $user->uid;
  if ($cache = cache_get($cid)) {
    $items = unserialize($cache->data);
  }
  else {
    $depth = variable_get('gallery_menu_depth', 5);
    $tree = gallery_album_tree(NULL, $depth ? $depth : NULL);
    if (count($tree)) {
      _gallery_menu_traverse($tree, $items);
      // My Album link
      $items[] = array(
        'path' => gallery_user_useralbum(),
        'title' => t('My Album'),
        'description' => t('Go to your Gallery2 useralbum.'),
        'callback' => 'gallery_page',
        'access' => user_access('access gallery')
      );
      cache_set($cid, 'cache', serialize($items), CACHE_TEMPORARY);
    }
  }
  
  return $items;
}

/**
 * Function _gallery_menu_traverse().
 */
function _gallery_menu_traverse(&$tree, &$items) {
  static $parents = array();
  foreach (array_keys($tree) as $id) {
    if (variable_get('gallery_menu_show_'. $id, 1)) {
      $item = array();
      // Check for URL Rewrite being available
      $url_generator =& $GLOBALS['gallery']->getUrlGenerator();
      if (isset($url_generator->_shortUrls) && variable_get('gallery_menu_rewrite', 0)) {
        $item['path'] = _gallery_menu_album_path($id);
      }
      else {
        $item['path'] = 'gallery/'. (count($parents) ? implode('/', $parents) .'/' : '') . $id;
        $item['callback'] = 'gallery_menu_album';
        $item['callback arguments'] = array($id);
      }
      $album = gallery_item_details($id);
      $item['title'] = $album['title'];
      $item['access'] = user_access('access gallery');
      $item['type'] = MENU_DYNAMIC_ITEM;
      $items[] = $item;
      if (count($tree[$id])) {
        array_push($parents, $id);
        _gallery_menu_traverse($tree[$id], $items);
        array_pop($parents);
      }
    }
  }
}

/**
 * Function _gallery_menu_album_path().
 */
function _gallery_menu_album_path($id) {
  $path = urldecode(gallery_generate_url(array('itemId' => $id), FALSE, FALSE));
  // Strip off the base path ...
  $path = substr($path, strlen(base_path()));
  // ... and additional parameter (e.g. session id, etc.)
  if (($pos = strrpos($path, '/')) !== FALSE) {
    $path = substr($path, 0, $pos + 1);
  }
  // Remove the language-prefix
  if (module_exists('i18n')) {
    i18n_get_lang_prefix($path, TRUE);
  }
  
  return rtrim($path, '/');
}

/**
 * Function _gallery_menu_settings().
 */
function _gallery_menu_settings() {
  $form['menu'] = array(
    '#type' => 'fieldset',
    '#title' => t('Gallery menu settings'),
    '#collapsible' => FALSE,
    '#collapsed' => FALSE,
  );
  $url_generator =& $GLOBALS['gallery']->getUrlGenerator();
  $form['menu']['gallery_menu_rewrite'] = array(
    '#type' => 'checkbox',
    '#title' => t('Enable URL Rewrite mode'),
    '#default_value' => variable_get('gallery_menu_rewrite', 0),
    '#description' => t('By default gallery menu paths look like \'gallery/album_id/subalbum_id\'. However if URL Rewrite
                         plugin is enabled in G2 you can force the module to use the same paths as generated by G2 internally
                         (i.e. \'gallery/v/album/subalbum\').'),
    '#disabled' => !isset($url_generator->_shortUrls)
  );
  $form['menu']['gallery_menu_depth'] = array(
    '#type' => 'textfield',
    '#title' => t('Depth of Gallery albums'),
    '#size' => 10,
    '#default_value' => variable_get('gallery_menu_depth', 5),
    '#description' => 'Depth of album hierarchy to include (\'0\' for infinite).'
  );

  // Item visibility settings
  $form['menu']['items'] = array(
    '#type' => 'fieldset',
    '#title' => t('Menu Items'),
    '#collapsible' => TRUE,
    '#collapsed' => TRUE
  );
  $form['menu']['items'][] = _gallery_menu_settings_table();
  
  $form['#submit']['_gallery_menu_settings_submit'] = array();
  $form['#submit']['system_settings_form_submit'] = array();
  return system_settings_form($form);
}

/**
 * Function _gallery_menu_settings_submit().
 */
function _gallery_menu_settings_submit($form_id, $form_values) {
  cache_clear_all('gallery:menu', 'cache', TRUE);
}

/**
 * Function _gallery_menu_settings_table().
 */
function _gallery_menu_settings_table() {
  $depth = variable_get('gallery_menu_depth', 5);
  $tree = gallery_album_tree(NULL, $depth ? $depth : NULL);
  
  $form = _gallery_menu_settings_traverse($tree);
  $form['#theme'] = 'gallery_menu_settings_table';
  
  GalleryEmbed::done();
  return $form;
}

/**
 * Function _gallery_menu_album_traverse().
 */
function _gallery_menu_settings_traverse(&$tree) {
  static $parents = array();
  foreach (array_keys($tree) as $id) {
    $album = gallery_item_details($id);
    $enabled = variable_get('gallery_menu_show_'. $id, 1);
    $form[$id]['title'] = array('#value' => implode('', $parents) .' '. $album['title']);
    $form[$id]['checkbox']['gallery_menu_show_'. $id] = array(
      '#type' => 'checkbox',
      '#title' => '',
      '#default_value' => $enabled
    );
    if (count($tree[$id]) && $enabled) {
      array_push($parents, '-');
      $form[$id]['children'] = _gallery_menu_settings_traverse($tree[$id]);
      array_pop($parents);
    }
  }
  
  return $form;
}

/**
 * Theme function : theme_gallery_menu_settings_table().
 */
function theme_gallery_menu_settings_table($form, $rows = array()) {
  static $depth = 0;
  foreach (element_children($form) as $key) {
    if (isset($form[$key]['title'])) {
      $row = array();
      $row[] = drupal_render($form[$key]['title']);
      $row[] = drupal_render($form[$key]['checkbox']);
      $rows[] = $row;
    }
    if (isset($form[$key]['children'])) {
      $depth++;
      $rows = theme_gallery_menu_settings_table($form[$key]['children'], $rows);
    }
  }

  $depth--;
  return ($depth < 0) ? theme('table', array(t('Album'), t('Show')), $rows) : $rows;
}