public function open_conversation(Conversation $conversation) {
/*
(Conversation) -> Bool
*/
if ($this->user_id) {
if ($conversation->action_allowed($this, __METHOD__)) {
$conversation->open_self();
}
else {
throw new OutOfBoundsException('OutOfBoundsException occured on method call close_conversation becauase the current user does not have permission to perform this action');
}
}
else {
throw new UnexpectedValueException('UnexpectedValueException occured on method call ' . __METHOD__ . ' because the user id is invalid');
}
}