<?php
// $Id:
// MultiLink SecurePages module for Drupal 6.
// Provides integration between MultiLink and SecurePages module.
// License: http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
// Support: Commercial support and customization is available from www.netgenius.co.uk
// Contact: www.netgenius.co.uk/contact or email drupal at netgenius.co.uk


/*
 * Get a url, including correct protocol.
 * Returned url will be absolute if securepages is enabled, otherwise depending on passed $options.
 */
function multilink_securepages_url($path, $options = array()) {
  // We do not use securepages_url as it does not seem to handle languages.
  if (multilink_securepages_enable()) {
    $https = securepages_match($path) || (securepages_is_secure() && !variable_get('securepages_switch', FALSE));
    $options['base_url'] = securepages_baseurl($https);
    $options['absolute'] = 1;
  }
  $url = url($path, $options);
  //drupal_set_message(sprintf('https: %d, path: %s, url: %s', $https, $path, $url));
  return $url;
}

// We do not use securepages_url as it does not seem to handle languages.
/*
function multilink_securepages_url($path, $options) {
  if (multilink_securepages_enable()) {
    $options['secure'] = securepages_match($path);
    $url = securepages_url($path, $options);
    drupal_set_message(sprintf('path: %s, url: %s, $path, $url), 'warning');
  }
  else {
    $url = url($path, $options);
  }

  drupal_set_message(sprintf('path: %s, url: %s', $path, $url), 'error');
  return $url;
}
*/

/**
 * Implementation of hook_link_alter().
 */
// SecurePages does not seem to generate links correctly in a multi-language site.
// Here we try to fix that.
function multilink_securepages_link_alter(&$links, $node) {
  if (multilink_securepages_enable()) {
    foreach ($links as $module => &$link) {
      if ($link['href'] && securepages_can_alter_url($link['href'])) {
        //drupal_set_message(print_r($link, 1));
        $url = multilink_securepages_url($link['href']);
        //drupal_set_message('multilink securepages_link_alter:' . $link['href'] . '->' . $url, 'warning');
        $links[$module]['href'] = $url;
      }
    }
  }
}

// Utility function for MultiLink Redirect to fix interference with Secure Pages redirects.
function multilink_securepages_redirect_fix($rpath) {

  if (multilink_securepages_enable()) {
    // If destination is set but the same as current requested path, remove destination.
    // This fixes a loop condition with Secure Pages due to having a secure page in destination:
    // Drupal redirects to http://[destination] and we then redirect to https://[destination], repeatedly.
    // Example: http[s]://example.org/en/node/1?destination=node/1 where node/1 is set for https would loop.
    if (isset($_REQUEST['destination'])) {
      $destination = multilink_securepages_url($_REQUEST['destination']);
      if ($rpath == $destination) {
        unset($_REQUEST['destination']);
        //drupal_set_message('Removed destination: ' . $destination, 'error');
      }
    }
  }
}

// Utility function to check if Secure Pages is enabled and disable it prevent conflicts.
// This with the form_alter hook below allow us to take over from Secure Pages for redirects and link processing.
function multilink_securepages_enable() {
  if (variable_get('securepages_enable', 0)) {
    variable_del('securepages_enable');
    variable_set('multilink_securepages_enable', TRUE);
    return TRUE;
  }
  else {
    return variable_get('multilink_securepages_enable', FALSE);
  }
}

/*
 * Hook form_FORM_ID_modify
 */
function multilink_securepages_form_securepages_settings_alter(&$form, $form_state)
{
  $old_element = $form['securepages_enable'];
  $element = array(
    '#title' => t($old_element['#title']) . ' ' . t('(via %module)', array('%module' => 'MultiLink')),
    '#default_value' => multilink_securepages_enable(),
    '#disabled' => $old_element['#disabled'] && !multilink_securepages_enable(),
  );
  $new_form['multilink_securepages_enable'] = array_merge($old_element, $element);
  unset($form['securepages_enable']);
  $form = array_merge($new_form, $form);
}
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