<?php

/*
 * This file is part of Phraseanet
 *
 * (c) 2005-2010 Alchemy
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

/**
 *
 * @package     searchEngine
 * @license     http://opensource.org/licenses/gpl-3.0 GPLv3
 * @link        www.phraseanet.com
 */
class searchEngine_adapter
{

  /**
   *
   * @var searchEngine_adapter_interface
   */
  protected $search_engine;
  /**
   *
   * @var searchEngine_adapter_options
   */
  protected $search_options;
  /**
   *
   * @var boolean
   */
  protected $first_page = false;

  /**
   *
   * @param registryInterface $registry
   * @return searchEngine_adapter
   */
  public function __construct(registryInterface $registry)
  {
    if ($registry->get('GV_sphinx'))
    {
      $this->search_engine = new searchEngine_adapter_sphinx_engine();
    }
    elseif (function_exists('phrasea_query2'))
    {
      $this->search_engine = new searchEngine_adapter_phrasea_engine();
    }
    else
    {
      throw new Exception('No search engine available, try phrasea2 or sphinx');
    }

    return $this;
  }

  /**
   *
   * @param searchEngine_options $options
   * @return searchEngine_adapter
   */
  public function set_options(searchEngine_options $options)
  {
    $this->search_options = $options;
    $this->search_engine->set_options($options);

    return $this;
  }

  /**
   *
   * @param boolean $boolean
   * @return searchEngine_adapter
   */
  public function set_is_first_page($boolean)
  {
    $this->first_page = !!$boolean;

    return $this;
  }

  /**
   *
   * @return boolean
   */
  public function is_first_page()
  {
    return $this->first_page;
  }

  /**
   *
   * @return string
   */
  public function get_query()
  {
    return $this->search_engine->get_parsed_query();
  }

  /**
   *
   * @return searchEngine_adapter
   */
  public function reset_cache()
  {
    $this->search_engine->reset_cache();

    return $this;
  }

  /**
   *
   * @param string $query
   * @param int $page
   * @param int $perPage
   * @return searchEngine_results
   */
  public function query_per_page($query, $page, $perPage)
  {
    assert(is_int($page));
    assert($page > 0);
    assert(is_int($perPage));
    assert($perPage > 0);
    $offset = ($page - 1) * $perPage;

    return $this->search_engine->results($query, $offset, $perPage);
  }

  /**
   *
   * @param string $query
   * @param int $offset
   * @param int $perPage
   * @return searchEngine_results
   */
  public function query_per_offset($query, $offset, $perPage)
  {
    assert(is_int($offset));
    assert($offset >= 0);
    assert(is_int($perPage));
    assert($perPage > 0);

    return $this->search_engine->results($query, $offset, $perPage);
  }

  /**
   *
   * @return array
   */
  public function get_status()
  {
    return $this->search_engine->get_status();
  }

  public function build_excerpt($query, array $fields, record_adapter $record)
  {
    return $this->search_engine->build_excerpt($query, $fields, $record);
  }

}