<?php
// $Id: google.module,v 1.1.2.7 2008/07/02 01:25:34 mfb Exp $

/**
 * @file
 * Integrates Google Custom Search Engine with the Drupal core search API.
 */

/**
 * Implementation of hook_search().
 */
function google_search($op = 'search', $keys = NULL) {
  if (user_access('search Google CSE')) {
    switch ($op) {
      case 'name':
        return google_cse_results_tab();
      case 'search':
        google_cse_results_set_title();
        return array(0);
    }
  }
}

/**
 * Implementation of hook_search_page().
 */
function google_search_page($results) {
  return theme('google_cse_results', FALSE);
}

/**
 * Implementation of hook_init().
 */
function google_init() {
  if (arg(0) == 'search' && arg(1) == 'google' && (is_null(arg(2)) || !isset($_GET['query']))) {
    if ($_SERVER['REQUEST_METHOD'] != 'POST' && $keys = isset($_GET['query']) ? $_GET['query'] : arg(2)) {
      drupal_goto('search/google/'. $keys, google_build_query($keys));
    }
  }
}

/**
 * Implementation of hook_form_alter().
 */
function google_form_alter(&$form, $form_state, $form_id) {
  if ($form_id == 'search_form' && $form['module']['#value'] == 'google') {
    drupal_add_js(array('googleCSE' => array('searchForm' => TRUE)), 'setting', 'footer');
    google_cse_sitesearch_form($form);
    if (variable_get('google_cse_results_gadget', 1)) {
      $form['basic']['inline']['submit']['#suffix'] = theme('google_cse_results_gadget');
    }
    $form['#submit'][] = 'google_submit_redirect';
  }
}

/**
 * Redirect form submission to URL with query parameters.
 */
function google_submit_redirect($form, &$form_state) {
  $keys = $form_state['values']['processed_keys'];
  $sitesearch = isset($form_state['values']['sitesearch']) ? $form_state['values']['sitesearch'] : NULL;
  $form_state['redirect'] = array('search/google/'. $keys, google_build_query($keys, $sitesearch));
}

/**
 * Build a query array based on Google CSE settings.
 */
function google_build_query($keys, $sitesearch = NULL) {
  return array(
    'query' => $keys,
    'cx' => variable_get('google_cse_cx', ''),
    'cof' => variable_get('google_cse_cof_here', 'FORID:11'),
    'sitesearch' => isset($sitesearch) ? $sitesearch : google_cse_sitesearch_default(),
  ) + google_cse_advanced_settings();
}