<?php defined("SYSPATH") or die("No direct script access.");
/**
 * Gallery - a web based photo album viewer and editor
 * Copyright (C) 2000-2012 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 date_tag_task_Core {

	static function available_tasks() {
		$tasks[] = Task_Definition::factory()
			->callback("date_tag_task::date_tag_all")
			->name(t("Add tags for dates"))
			->description(t("Add tags for dates of all images that have already been uploaded"))
			->severity(log::SUCCESS);
		return $tasks;
	}

	/**
	 * @param Task_Model the task
	 */
	static function date_tag_all($task) {
		$errors = array();
		try {
			$start = microtime(true);
			$last_item_id= $task->get("last_item_id", null);
			$current = 0;
			$total = 0;

			switch ($task->get("mode", "init")) {
			case "init":
				$task->set("total", ORM::factory("item")->where("type", "=", "photo")->count_all());
				$task->set("mode", "date_tag_all");
				$task->set("completed", 0);
				$task->set("last_item_id", 0);

			case "date_tag_all":
				$completed = $task->get("completed");
				$total = $task->get("total");
				$last_item_id= $task->get("last_item_id");
				$items = ORM::factory("item")
					->where("id", ">", $last_item_id)
					->and_where("type", "=", "photo")
					->find_all(5); /* TODO: should we fetch more at a time? Less? */
				while ($current < $total && microtime(true) - $start < 1 && $item = $items->current()) {
					$last_tem_id = $item->id;
					$task->log("Looking at item {$item->name} (id: {$item->id})");
					date_tag::tag_item($item);

					$completed++;
					$items->next();
					$task->percent_complete = $completed / $total * 100;
					$task->set("completed", $completed);
					$task->set("last_item_id", $item->id);


					$task->status = t2("Examined %count items", "Examined %count items", $completed);

					if ($completed == $total) {
						$task->done = true;
						$task->state = "success";
						$task->percent_complete = 100;
					}
				}
			}
		} catch (Exception $e) {
			Kohana_Log::add("error",(string)$e);
			$task->done = true;
			$task->state = "error";
			$task->status = $e->getMessage();
			$errors[] = (string)$e;
		}
		if ($errors) {
			$task->log($errors);
		}
	}
}