function fb_canvas_fix_url in Drupal for Facebook 6.3

Same name and namespace in other branches

1. 5.2 fb_canvas.module \fb_canvas_fix_url()
2. 5 fb_canvas.module \fb_canvas_fix_url()
3. 6.2 fb_canvas.module \fb_canvas_fix_url()

Convert a local fully qualified path to a facebook app path. This needs to be used internally, to fix drupal_gotos upon form submission. Third party modules should not need to call this.

2 calls to fb_canvas_fix_url()

fb_canvas_fb in ./fb_canvas.module

Implementation of hook_fb().

fb_canvas_goto in ./fb_canvas.module

Uses javascript on iframe canvas pages change top frame, otherwise drupal_goto().

File

./fb_canvas.module, line 287

This module provides support for Canvas page applications. Use Drupal to power traditional Facebook Apps.

Code

function fb_canvas_fix_url($url, $fb_app) {

  //dpm(debug_backtrace(), "fb_canvas_fix_url($url)");
  global $base_url;

  // Url rewrites still used for iframe canvas pages.
  $patterns[] = "|{$base_url}/" . FB_SETTINGS_CB . "/{$fb_app->apikey}/|";

  // Here we hard-wire apps.facebook.com.  Is there an API to get that?
  // base_root is from Drupal's conf_init().
  $replacements[] = fb_protocol() . "://apps.facebook.com/{$fb_app->canvas}/";

  // Fully qualified paths.
  $patterns[] = "|" . url('', array(
    'absolute' => TRUE,
  )) . "|";
  $replacements[] = fb_protocol() . "://apps.facebook.com/{$fb_app->canvas}/";

  // Facebook will prepend "appNNN_" all our ids
  $patterns[] = "|#([^\\?]*)|";
  $replacements[] = "#app{$fb_app->id}_\$1";
  $url = preg_replace($patterns, $replacements, $url);
  return $url;
}