<?php
// $Id: gallery_menu.module,v 1.3 2007-11-23 11:20:33 profix898 Exp $

/**
 * gallery_menu.module
 */
 
/**
 * Implementation of hook_theme().
 */
function gallery_menu_theme() {
  return array(
    'gallery_menu_settings_table' => array(
      'arguments' => array('form' => NULL, 'rows' => NULL),
    )
  );
}

/**
 * Implementation of hook_init().
 */
function gallery_menu_init() {
  // Initialize G2
  if (!_gallery_init(FALSE)) {
    return;
  }
  // 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]) {
    menu_rebuild();
    variable_set('gallery_menu_timestamp', time());
  }
}

/**
 * Implementation of hook_menu().
 */
function gallery_menu_menu() {
  $items = array();
  if (variable_get('gallery_valid', 0)) {
    $items['admin/settings/gallery/menu'] = array(
      'title' => 'Menu',
      'access callback' => 'user_access',
      'access arguments' => array('administer gallery settings'),
      'page callback' => 'drupal_get_form',
      'page arguments' => array('_gallery_menu_settings'),
      'type' => MENU_LOCAL_TASK,
      'weight' => 5
    );
    $items = array_merge($items, gallery_menu_build_menu());
  }

  return $items;
}

/**
 * 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);
}

/**
 * Implementation of hook_gallery_page_alter().
 */
function gallery_menu_gallery_page_alter(&$result) {
  if (isset($result['themeData']['pageUrl']['itemId'])) {
    $id = $result['themeData']['pageUrl']['itemId'];
    $item = gallery_item_details($id);
    if ($item['g2type'] != 'GalleryAlbumItem') {
      $id = $item['g2parent'];
    }
    list($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) .'/' : '') . $id;
      menu_set_active_item($path);
    }
  }
}

/**
 * Function gallery_menu_build_menu().
 */
function gallery_menu_build_menu() {
  $items = array();
  // Load any user from the G2 admin group
  list($ret, $g2_admin_gid) = GalleryCoreApi::getPluginParameter('module', 'core', 'id.adminGroup');
  if ($ret) {
    gallery_error(t('Error getting \'adminGroup\' id'), $ret);
    return $items;
  }
  list($ret, $user) = GalleryCoreApi::fetchUsersForGroup($g2_admin_gid, 1);
  if ($ret) {
    gallery_error(t('Error fetching users for \'adminGroup\' id'), $ret);
    return $items;
  }
  $user = array_keys($user);
  // Fetch the album tree and generate the menu items
  $depth = variable_get('gallery_menu_depth', 0);
  $tree = gallery_album_tree(NULL, $depth ? $depth : NULL, $user[0]);
  _gallery_menu_traverse($tree, $items);
  
  return $items;
}

/**
 * Function _gallery_menu_traverse().
 */
function _gallery_menu_traverse(&$tree, &$items) {
  static $parents = array();
  foreach (array_keys($tree) as $id) {
    $album = gallery_item_details($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)) {
        $path = gallery_generate_url(array('itemId' => $id), FALSE, FALSE);
        $item['path'] = substr($path, strlen(base_path()));
      }
      else {
        $item['path'] = 'gallery/'. (count($parents) ? implode('/', $parents) .'/' : '') . $id;
        $item['page callback'] = 'gallery_menu_album';
        $item['page arguments'] = array((string)$id);
      }
      $item['title'] = $album['title'];
      $item['access callback'] = 'gallery_item_access';
      $item['access arguments'] = array((string)$id);
      $items[] = $item;
      if (count($tree[$id])) {
        array_push($parents, $id);
        _gallery_menu_traverse($tree[$id], $items);
        array_pop($parents);
      }
    }
    $tree[$id] += $album;
  }
}

/**
 * Function _gallery_menu_settings().
 */
function _gallery_menu_settings() {
  $form['menu'] = array(
    '#type' => 'fieldset',
    '#title' => t('Gallery menu settings'),
    '#collapsible' => FALSE,
    '#collapsed' => FALSE,
  );
  $form['menu']['gallery_menu_depth'] = array(
    '#type' => 'textfield',
    '#title' => t('Depth of Gallery albums'),
    '#default_value' => variable_get('gallery_menu_depth', 0),
    '#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();
  
  return system_settings_form($form);
}

/**
 * Function _gallery_menu_settings_table().
 */
function _gallery_menu_settings_table() {
  if (!_gallery_init(TRUE)) {
    return array();
  }
  
  $depth = variable_get('gallery_menu_depth', 0);
  $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);
    }
    $tree[$id] += $album;
  }
  
  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;
}