<?php defined("SYSPATH") or die("No direct script access.");
/**
 * Gallery - a web based photo album viewer and editor
 * Copyright (C) 2000-2009 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 Albums_Controller extends Items_Controller {
  public function index() {
    $this->show(ORM::factory("item", 1));
  }

  public function show($album) {
    if (!is_object($album)) {
      // show() must be public because we route to it in url::parse_url(), so make
      // sure that we're actually receiving an object
      Kohana::show_404();
    }
    $page_size = module::get_var("gallery", "page_size", 9);
    if (!access::can("view", $album)) {
      if ($album->id == 1) {
        $view = new Theme_View("page.html", "other", "login");
        $view->page_title = t("Log in to Gallery");
        $view->content = new View("login_ajax.html");
        $view->content->form = auth::get_login_form("login/auth_html");
        print $view;
        return;
      } else {
        access::forbidden();
      }
    }

    $show = $this->input->get("show");

    if ($show) {
      $child = ORM::factory("item", $show);
      $index = $album->get_position($child);
      if ($index) {
        $page = ceil($index / $page_size);
        if ($page == 1) {
          url::redirect($album->abs_url());
        } else {
          url::redirect($album->abs_url("page=$page"));
        }
      }
    }

    $page = $this->input->get("page", "1");
    $children_count = $album->viewable()->children_count();
    $offset = ($page - 1) * $page_size;
    $max_pages = max(ceil($children_count / $page_size), 1);

    // Make sure that the page references a valid offset
    if ($page < 1) {
      url::redirect($album->abs_url());
    } else if ($page > $max_pages) {
      url::redirect($album->abs_url("page=$max_pages"));
    }

    $template = new Theme_View("page.html", "collection", "album");
    $template->set_global("page", $page);
    $template->set_global("max_pages", $max_pages);
    $template->set_global("page_size", $page_size);
    $template->set_global("item", $album);
    $template->set_global("children", $album->viewable()->children($page_size, $offset));
    $template->set_global("children_count", $children_count);
    $template->set_global("parents", $album->parents());
    $template->content = new View("album.html");

    // We can't use math in ORM or the query builder, so do this by hand.  It's important
    // that we do this with math, otherwise concurrent accesses will damage accuracy.
    Database::instance()->query(
      "UPDATE {items} SET `view_count` = `view_count` + 1 WHERE `id` = $album->id");

    print $template;
  }

  public function create($parent_id) {
    access::verify_csrf();
    $album = ORM::factory("item", $parent_id);
    access::required("view", $album);
    access::required("add", $album);

    $form = album::get_add_form($album);
    if ($form->validate()) {
      $new_album = album::create(
        $album,
        $this->input->post("name"),
        $this->input->post("title", $this->input->post("name")),
        $this->input->post("description"),
        identity::active_user()->id,
        $this->input->post("slug"));

      log::success("content", "Created an album",
                   html::anchor("albums/$new_album->id", "view album"));
      message::success(t("Created album %album_title",
                         array("album_title" => html::purify($new_album->title))));

      print json_encode(
        array("result" => "success",
              "location" => $new_album->url()));
    } else {
      print json_encode(
        array(
          "result" => "error",
          "form" => $form->__toString()));
    }
  }

  public function update($album_id) {
    access::verify_csrf();
    $album = ORM::factory("item", $album_id);
    access::required("view", $album);
    access::required("edit", $album);

    $form = album::get_edit_form($album);
    if ($valid = $form->validate()) {
      if ($album->id != 1 &&
          $form->edit_item->dirname->value != $album->name ||
          $form->edit_item->slug->value != $album->slug) {
        // Make sure that there's not a conflict
        $errors = item::check_for_conflicts(
          $album, $form->edit_item->dirname->value, $form->edit_item->slug->value);

        if (!empty($errors["name_conflict"])) {
          $form->edit_item->dirname->add_error("name_conflict", 1);
        }
        if (!empty($errors["slug_conflict"])) {
          $form->edit_item->slug->add_error("slug_conflict", 1);
        }
        $valid = empty($errors);
      }
    }

    if ($valid) {
      $watching_album = $album->url() != ($location = parse_url(request::referrer(), PHP_URL_PATH));

      $new_values = array("title" => $form->edit_item->title->value,
                          "description" => $form->edit_item->description->value,
                          "sort_column" => $form->edit_item->sort_order->column->value,
                          "sort_order" => $form->edit_item->sort_order->direction->value,
                          "slug" => $form->edit_item->slug->value);
      if ($album->id != 1) {
        $new_values["name"] = $form->edit_item->dirname->value;
      }
      item::update($album, $new_values);

      module::event("item_edit_form_completed", $album, $form);

      log::success("content", "Updated album", "<a href=\"albums/$album->id\">view</a>");
      message::success(t("Saved album %album_title",
                         array("album_title" => html::purify($album->title))));

      print json_encode(
        array("result" => "success",
              "location" => $watching_album ? $location : $album->url()));
    } else {
      print json_encode(
        array("result" => "error",
              "form" => $form->__toString()));
    }
  }

  public function form_add($album_id) {
    $album = ORM::factory("item", $album_id);
    access::required("view", $album);
    access::required("add", $album);

    print album::get_add_form($album);
  }

  public function form_edit($album_id) {
    $album = ORM::factory("item", $album_id);
    access::required("view", $album);
    access::required("edit", $album);

    print album::get_edit_form($album);
  }
}