<?php

/**
 * @file
 * Drupal hooks
 */

/**
 * Implements hook_menu().
 */
function search_api_attachments_menu() {
  $items['admin/config/search/search_api/attachments'] = array(
    'title' => 'Search API attachments',
    'description' => 'Search through file content',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('search_api_attachments_settings_form'),
    'access arguments' => array('administer search_api'),
    'file' => 'search_api_attachments.admin.inc',
    'type' => MENU_LOCAL_TASK,
  );
  return $items;
}

/**
 * Implements hook_views_api().
 */
function search_api_attachments_views_api() {
  return array(
    'api' => '3.0',
  );
}

/**
 * Implements hook_search_api_alter_callback_info().
 */
function search_api_attachments_search_api_alter_callback_info() {
  $callbacks['search_api_attachments_alter_settings'] = array(
    'name' => t('File attachments'),
    'description' => t('Extract the content out of attached files and index it.'),
    'class' => 'SearchApiAttachmentsAlterSettings',
  );
  return $callbacks;
}

/**
 * Default excluded file extensions.
 */
function search_api_attachments_default_excluded() {
  $default = array(
    'aif',
    'art',
    'avi',
    'bmp',
    'gif',
    'ico',
    'mov',
    'oga',
    'ogv',
    'png',
    'psd',
    'ra',
    'ram',
    'rgb',
    'flv',
  );
  return $default;
}

/**
 * Implements hook_file_update().
 */
function search_api_attachments_file_update($file) {
  // If there is cached extracted data for this file, delete it so it can be
  // re-extracted.
  $file = (array) $file;
  $cid = 'cached_extraction_:' . $file['fid'];
  cache_clear_all($cid, 'cache_search_api_attachments');
}

/**
 * Implements hook_file_delete().
 */
function search_api_attachments_file_delete($file) {
  // If there is cached extracted data for this file, delete it.
  // We don't need it anymore.
  $file = (array) $file;
  $cid = 'cached_extraction_:' . $file['fid'];
  cache_clear_all($cid, 'cache_search_api_attachments');
}

/**
 * Implements hook_flush_caches().
 */
function search_api_attachments_flush_caches() {
  if (!variable_get('search_api_attachments_preserve_cache', FALSE)) {
    return array('cache_search_api_attachments');
  }
}