[development] Rules action to impersonate a user

[Lluís Forns]

Some of my scheduled task needs to run as the user who triggered them (not
anonymous neither admin); so I thought of writing two actions:
- One to impersonate a user, which will receive uid as an argument.
- Another to undo the impersonate.
All the called actions should be between them.

Anybody see any fault in this idea or the actions code?

Thanks.

function wu_action_impersonate($uid) {
  global $user;
  if (!array_key_exists('wu_action_impersonate', $_SESSION)) {
    $_SESSION['wu_action_impersonate'] = array();
  }
  array_push($_SESSION['wu_action_impersonate'], $user);
  session_save_session(FALSE);
  $user = user_load($uid);
  user_load($uid);
}

function wu_action_unimpersonate() {
  global $user;
  if (array_key_exists('wu_action_impersonate', $_SESSION)) {
    if (!empty($_SESSION['wu_action_impersonate'])) {
      $user = array_pop($_SESSION['wu_action_impersonate']);
    }
    if (empty($_SESSION['wu_action_impersonate'])) {
      unset($_SESSION['wu_action_impersonate']);
    }
  }
  session_save_session(TRUE);
}

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