function _fb_canvas_make_form_action_local in Drupal for Facebook 6.2

Same name and namespace in other branches

1. 5.2 fb_canvas.module \_fb_canvas_make_form_action_local()
2. 5 fb_canvas.module \_fb_canvas_make_form_action_local()

1 call to _fb_canvas_make_form_action_local()

fb_canvas_form_alter in ./fb_canvas.module

Implementation of hook_form_alter.

File

./fb_canvas.module, line 544

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

Code

function _fb_canvas_make_form_action_local($action = NULL) {
  global $base_path;
  if (!isset($action)) {

    // Is this ever reached?
    if (function_exists('dpm')) {
      dpm("_fb_canvas_make_form_action_local({$action})");
    }

    // XXX
    $action = $_GET['q'];
  }

  // If action is fully qualified, do not change it
  if (strpos($action, ':')) {
    if (function_exists('dpm')) {
      dpm($action, "leaving form action untouched");
    }

    // XXX
    return $action;
  }

  // I'm not sure where the problem is, but sometimes actions have two question marks.  I.e.
  // /htdocs/?app=foo&q=user/login?destination=comment/reply/1%2523comment-form
  // Here we replace 3rd (or more) '?' with '&'.
  $parts = explode('?', $action);
  if (count($parts) > 2) {
    if (fb_verbose()) {
      watchdog('fb_canvas', "fixing badly formed action: " . $action);
    }
    $action = array_shift($parts) . '?' . array_shift($parts);
    $action .= '&' . implode('&', $parts);
  }
  $relative = url('');
  $absolute = url('', array(
    'absolute' => TRUE,
  ));
  $base_path = base_path();

  // By default, '#action' will be request_uri(), which starts with base_path();
  global $_fb_app;
  if (strpos($action, FB_SETTINGS_CB)) {

    // XXX old way.  Will go away.
    $action = $absolute . substr($action, strlen($relative));
  }
  elseif (strpos($action, $relative) === 0 && function_exists('fb_url_inbound_alter')) {

    // XXX another old way.
    // Replace relative action with absolute.
    // Include fb settings
    // TODO: FB_SETTINGS_CB_TYPE
    $action = $absolute . FB_SETTINGS_CB . '/' . $_fb_app->label . '/' . substr($action, strlen($relative));
  }
  else {

    // New way...
    if (strpos($action, $relative) === 0) {

      // If here, the action was made by call to url() and we prepended
      // canvas_name.  Now remove the canvas name for a proper absolute url.
      // (Comment forms reach this clause but node forms do not.)
      $action = substr($action, strlen($relative));
    }
    elseif ($base_path && strpos($action, $base_path) === 0) {
      $action = substr($action, strlen($base_path));
    }
    $action = url(ltrim($action, '/'), array(
      'absolute' => TRUE,
    ));
  }

  // Changed code to work when $base_path set.  Need to test on server where base_path is ''.

  //dpm($action, "_fb_canvas_make_form_action_local returning<br/>");
  return $action;
}