Import user image from Twitter upon login

In my own twitter login implementation I have it set up in such a way that once the user has been authenticated and (saved and) loaded, it retrieves the picture from Twitter, resizes it, saves it and updates the user picture path in the database. it depends on imageAPI, but this is only out of laziness :)

You could add the following to the end of twitter_signin_oauth_callback_submit()

$sourceUrl = $response['profile_image_url'];
$goalPathOriginal = file_directory_path()."/user_pictures/picture-".$response->screen_name."-original.jpg";
$goalPathResized = file_directory_path()."/user_pictures/picture-".$response->screen_name.".jpg";
$USER_PICTURE_WIDTH = 73;
$USER_PICTURE_HEIGHT = 73;

if ($account) {
  try {
    //if imageapi module exists
    if (module_exists("imageapi")) {
      //copy user picture from twitter
      file_save_data(file_get_contents($sourceUrl), $goalPathOriginal, FILE_EXISTS_REPLACE);
			
      //resize picture to 73x73 and save
      $image = imageapi_image_open($goalPathOriginal);
      imageapi_image_resize($image, $USER_PICTURE_WIDTH, $USER_PICTURE_HEIGHT);
      imageapi_image_close($image, $goalPathResized);
      $edit = array (
        'picture' => $goalPathResized
      );
      user_save($account, $edit);
    }			
  } catch (Exception $e) {
    watchdog('oauth_login', "Error saving/handling user picture: ".$e->getMessage(),'',WATCHDOG_WARNING);
  }
}

Some issues:
- It assumes a directory user_pictures exists in the files directory
- It assumes the picture is jpeg (probably not valid)

Sorry, I have no experiences with patches, so I don't know how to wrap it up properly. Hope this helps though.
Eelke