<?php defined("SYSPATH") or die("No direct script access.");
/**
 * Gallery - a web based photo album viewer and editor
 * Copyright (C) 2000-2008 Bharat Mediratta
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or (at
 * your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA  02110-1301, USA.
 */
class Theme_Core {
  private $theme_name = null;
  private $template = null;

  public function __construct($theme_name, $template) {
    $this->theme_name = $theme_name;
    $this->template = $template;
  }

  public function url($path) {
    return url::base() . "themes/{$this->theme_name}/$path";
  }

  public function item() {
    return $this->template->item;
  }

  public function display($page_name, $view_class="View") {
    return new $view_class($page_name);
  }

  public function pager() {
    $this->pagination = new Pagination();
    $this->pagination->initialize(
      array('query_string' => 'page',
            'total_items' => $this->template->item->children_count(),
            'items_per_page' => $this->template->page_size,
            'style' => 'classic'));
    return $this->pagination->render();
  }

  public function module($module_name) {
    $module = module::get($module_name);
    return $module->loaded ? $module : null;
  }

  public function in_place_edit() {
    return new View("in_place_edit.html");
  }

  /**
   * Handle all theme functions that insert module content.
   */
  public function __call($function, $args) {
    switch ($function) {
    case "admin":
    case "head":
    case "page_top":
    case "page_bottom":
    case "header_top":
    case "header_bottom":
    case "sidebar_top":
    case "sidebar_blocks":
    case "sidebar_bottom":
    case "album_top":
    case "album_blocks":
    case "album_bottom":
    case "thumbnail_top":
    case "thumbnail_bottom":
    case "thumbnail_info":
    case "photo_top":
    case "photo_blocks":
    case "photo_bottom":
      if (empty($this->block_helpers[$function])) {
        foreach (module::get_list() as $module) {
          $helper_class = "{$module->name}_block";
          if (method_exists($helper_class, $function)) {
            $this->block_helpers[$function][] = $helper_class;
          }
        }
      }

      $blocks = array();
      if (!empty($this->block_helpers[$function])) {
        foreach ($this->block_helpers[$function] as $helper_class) {
          $blocks[] = call_user_func_array(
            array($helper_class, $function),
            array_merge(array($this), $args));
        }
      }
      return implode("\n", $blocks);

    default:
      throw new Exception("@todo UNKNOWN_THEME_FUNCTION: $function");
    }
  }
}