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path: root/modules/search/helpers/search_task.php
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<?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 search_task_Core {
  static function available_tasks() {
    // Delete extra search_records
    Database::instance()->query(
      "DELETE FROM {search_records} " .
      "WHERE {search_records}.`item_id` NOT IN " .
      "(SELECT `id` FROM {items})");

    // Insert missing search_records
    Database::instance()->query(
      "INSERT INTO {search_records}(`item_id`) (" .
      " SELECT {items}.`id` FROM {items} " .
      " LEFT JOIN {search_records} ON ({search_records}.`item_id` = {items}.`id`) " .
      " WHERE {search_records}.`id` IS NULL)");

    list ($remaining, $total, $percent) = self::_get_stats();
    return array(Task_Definition::factory()
                 ->callback("search_task::update_index")
                 ->name(t("Update Search Index"))
                 ->description($remaining ?
                               t("Search index is %percent% up-to-date",
                                 array("percent" => $percent))
                               : t("Search index is up to date"))
                 ->severity($remaining ? log::WARNING : log::SUCCESS));
  }

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

    $start = microtime(true);
    while (!$task->done && microtime(true) - $start < 1) {
      foreach (ORM::factory("search_record")->where("dirty", 1)->limit(5)->find_all() as $record) {
        search::update_record($record);
        $completed++;
      }

      list ($remaining, $total, $percent) = self::_get_stats();
      if ($remaining + $completed) {
        $task->percent_complete = round(100 * $completed / ($remaining + $completed));
        $task->status = t("%done records updated, index is %percent% up-to-date",
                          array("done" => $completed, "percent" => $percent));
      } else {
        $task->percent_complete = 100;
      }
    }

    $task->set("completed", $completed);
    if ($remaining == 0) {
      $task->done = true;
      $task->state = "success";
      site_status::clear("search_index_out_of_date");
    }
  }

  private static function _get_stats() {
    $remaining = ORM::factory("search_record")->where("dirty", 1)->count_all();
    $total = ORM::factory("search_record")->count_all();
    $percent = round(100 * ($total - $remaining) / $total);
    return array($remaining, $total, $percent);
  }
}