/** * Validates a plugin's event callbacks. * * @param \Phergie\Irc\Bot\React\PluginInterface $plugin * @throws \RuntimeException if any event callback is invalid */ protected function validatePluginEvents(PluginInterface $plugin) { $events = $plugin->getSubscribedEvents(); if (!is_array($events)) { throw new \RuntimeException('Plugin of class ' . get_class($plugin) . ' has getSubscribedEvents() implementation' . ' that does not return an array'); } foreach ($events as $event => $callback) { if (!is_string($event) || !is_callable([$plugin, $callback]) && !is_callable($callback)) { throw new \RuntimeException('Plugin of class ' . get_class($plugin) . ' returns non-string event name or invalid callback' . ' for event "' . $event . '"'); } } }