<?php
// $Id: site_verify.module,v 1.10.2.1 2011-02-20 22:38:43 davereid Exp $

/**
 * Implements hook_menu().
 */
function site_verify_menu() {
  $items['admin/build/site-verify'] = array(
    'title' => 'Site verifications',
    'description' => 'Add, change or remove verifications for your site.',
    'page callback' => 'site_verify_list',
    'access arguments' => array('administer site configuration'),
    'file' => 'site_verify.admin.inc',
  );
  $items['admin/build/site-verify/list'] = array(
    'title' => 'List',
    'type' => MENU_DEFAULT_LOCAL_TASK,
    'weight' => -10,
  );
  $items['admin/build/site-verify/add'] = array(
    'title' => 'Add verification',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('site_verify_edit_form'),
    'access arguments' => array('administer site configuration'),
    'file' => 'site_verify.admin.inc',
    'type' => MENU_LOCAL_TASK,
  );
  $items['admin/build/site-verify/add/%site_verify_engine'] = array(
    'title' => 'Add',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('site_verify_edit_form', array(), 4),
    'access arguments' => array('administer site configuration'),
    'file' => 'site_verify.admin.inc',
    'type' => MENU_CALLBACK,
  );
  $items['admin/build/site-verify/%site_verify/edit'] = array(
    'page callback' => 'drupal_get_form',
    'page arguments' => array('site_verify_edit_form', 3),
    'access arguments' => array('administer site configuration'),
    'file' => 'site_verify.admin.inc',
    'type' => MENU_CALLBACK,
  );
  $items['admin/build/site-verify/%site_verify/delete'] = array(
    'page callback' => 'drupal_get_form',
    'page arguments' => array('site_verify_delete_form', 3),
    'access arguments' => array('administer site configuration'),
    'file' => 'site_verify.admin.inc',
    'type' => MENU_CALLBACK,
  );

  // Add the verification paths.
  $query = db_query("SELECT svid, file FROM {site_verify} WHERE file <> ''");
  while ($engine = db_fetch_object($query)) {
    $items[$engine->file] = array(
      'page callback' => 'site_verify_output',
      'page arguments' => array((string) $engine->svid),
      'access callback' => TRUE,
      'type' => MENU_CALLBACK,
    );
  }

  return $items;
}

/**
 * Implements hook_init().
 */
function site_verify_init() {
  // Add the verification meta tags to the front page.
  if (drupal_is_front_page()) {
    $query = db_query("SELECT meta FROM {site_verify} WHERE meta <> ''");
    while ($meta = db_result($query)) {
      drupal_set_html_head($meta);
    }
  }
}

/**
 * Menu load callback; loads a site verification record.
 *
 * This also loads the engine details if the record was found.
 *
 * @param $svid
 *   A site verification ID.
 * @return
 *   An array of the site verification record, or FALSE if not found.
 */
function site_verify_load($svid) {
  $record = db_fetch_array(db_query("SELECT svid, engine, file, file_contents, meta FROM {site_verify} WHERE svid = %d", $svid));
  if ($record) {
    $record['engine'] = site_verify_engine_load($record['engine']);
  }
  return $record;
}

/**
 * Menu load callback; loads engine details.
 *
 * @param $engine
 *   A string with the engine shortname.
 * @return
 *   An arary of the engine details, or FALSE if not found.
 */
function site_verify_engine_load($engine) {
  $engines = site_verify_get_engines();
  return isset($engines[$engine]) ? $engines[$engine] : FALSE;
}

/**
 * Implements hook_site_verify_engine_info().
 */
function site_verify_site_verify_engine_info() {
  $engines['google'] = array(
    'name' => t('Google'),
    'file' => TRUE,
    'file_contents' => TRUE,
    'file_example' => 'google1234567890abcdef.html',
    'meta' => TRUE,
    'meta_example' => '<meta name="google-site-verification" content="NbwaW3WIDp_SPsSsfl78Ive7F34-znm9lxLJXjuWNGE" />',
  );
  $engines['yahoo'] = array(
    'name' => t('Yahoo!'),
    'file' => TRUE,
    'file_contents' => TRUE,
    'meta' => TRUE,
  );
  $engines['bing'] = array(
    'name' => t('Bing'),
    'file' => TRUE,
    'file_contents' => TRUE,
    'meta' => TRUE,
  );
  $engines['yandex'] = array(
    'name' => t('Yandex'),
    'file' => TRUE,
    'file_example' => 'yandex_b5741169901f6c20.txt',
    'meta' => TRUE,
    'meta_example' => '<meta name="yandex-verification" content="b5741169901f6c20" />',
  );
  $engines['custom'] = array(
    'name' => t('Custom verification'),
    'file' => TRUE,
    'file_contents' => TRUE,
    'meta' => TRUE,
  );
  return $engines;
}

/**
 * Fetch an array of supported search engines.
 */
function site_verify_get_engines() {
  static $engines;

  if (!isset($engines)) {
    // Fetch the list of engines and allow other modules to alter it.
    $engines = module_invoke_all('site_verify_engine_info');
    drupal_alter('site_verify_engine', $engines);

    // Merge the default values for each engine entry.
    foreach ($engines as $key => $engine) {
      $engines[$key] += array(
        'key' => $key,
        //'name' => drupal_ucfirst($engine),
        'file' => FALSE,
        'file_example' => FALSE,
        'file_validate' => array(),
        'file_contents' => FALSE,
        'file_contents_example' => FALSE,
        'file_contents_validate' => array(),
        'meta' => FALSE,
        'meta_example' => FALSE,
        'meta_validate' => array(),
      );
    }
  }

  return $engines;
}

function site_verify_output($svid) {
  $verification = site_verify_load($svid);
  if ($verification['file_contents'] && $verification['engine']['file_contents']) {
    echo $verification['file_contents'];
  }
  else {
    drupal_set_title(t('Verification page'));
    return t('This is a verification page for the !title search engine.', array('!title' => $verification['engine']['name']));
  }
}