<?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 exif_task_Core {
  static function available_tasks() {
    // Delete extra exif_records
    Database::instance()->query(
      "DELETE FROM {exif_records} " .
      "WHERE {exif_records}.`item_id` NOT IN " .
      "(SELECT `id` FROM {items} WHERE {items}.`type` = 'photo')");

    list ($remaining, $total, $percent) = exif::stats();
    return array(Task_Definition::factory()
                 ->callback("exif_task::update_index")
                 ->name(t("Extract Exif data"))
                 ->description($remaining
                               ? t2("1 photo needs to be scanned",
                                    "%count (%percent%) of your photos need to be scanned",
                                    $remaining, array("percent" => (100 - $percent)))
                               : t("Exif data is up-to-date"))
                 ->severity($remaining ? log::WARNING : log::SUCCESS));
  }

  static function update_index($task) {
    try {
      $completed = $task->get("completed", 0);

      $start = microtime(true);
      $message = array();
      foreach (ORM::factory("item")
               ->join("exif_records", "items.id", "exif_records.item_id", "left")
               ->where("type", "photo")
               ->open_paren()
               ->where("exif_records.item_id", null)
               ->orwhere("exif_records.dirty", 1)
               ->close_paren()
               ->find_all() as $item) {
        if (microtime(true) - $start > 1.5) {
          break;
        }

        $completed++;
        exif::extract($item);
        $message[] = t("Updated Exif meta data for '%title'",
                       array("title" => p::purify($item->title)));
      }

      $task->log($message);
      list ($remaining, $total, $percent) = exif::stats();
      $task->set("completed", $completed);
      if ($remaining == 0 || !($remaining + $completed)) {
        $task->done = true;
        $task->state = "success";
        site_status::clear("exif_index_out_of_date");
        $task->percent_complete = 100;
      } else {
        $task->percent_complete = round(100 * $completed / ($remaining + $completed));
      }
      $task->status = t2("one record updated, index is %percent% up-to-date",
                         "%count records updated, index is %percent% up-to-date",
                         $completed, array("percent" => $percent));
    } catch (Exception $e) {
      $task->done = true;
      $task->state = "error";
      $task->status = $e->getMessage();
      $task->log($e->__toString());
    }
  }
}