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<?php |
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/** |
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* This file contains an abstract bzion event class |
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* |
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* @license https://github.com/allejo/bzion/blob/master/LICENSE.md GNU General Public License Version 3 |
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*/ |
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namespace BZIon\Event; |
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use BZIon\Debug\Debug; |
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use Symfony\Component\EventDispatcher\Event as SymfonyEvent; |
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/** |
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* A general BZiON event |
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* |
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* Events can be serialized using PHP's `serialize()` and `unserialize()` |
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* functions. Class properties present as parameters to the constructor are |
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* serialized and unserialized - if you provide type hinting for a model, only |
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* its ID (and type, if necessary) is stored. This means that you shouldn't |
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* change the parameter names or non-abstract model type hints without writing |
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* the appropriate database migrations first. |
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*/ |
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abstract class Event extends SymfonyEvent implements \Serializable |
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{ |
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/** |
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* Serialize an event so that it can be stored in the database |
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*/ |
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public function serialize() |
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{ |
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$class = new \ReflectionObject($this); |
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$params = $class->getConstructor()->getParameters(); |
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$data = array(); |
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// Iterate through all the parameters of the constructor |
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foreach ($params as $param) { |
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// Find the related class property |
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$property = $class->getProperty($param->getName()); |
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$property->setAccessible(true); |
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$value = $property->getValue($this); |
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// We just need to store IDs and types for models |
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if ($value !== null && $this->isModel($param)) { |
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if (!$param->getClass()->isAbstract()) { |
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// The parameter is a non-abstract model, we can just |
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// store its ID since the type will be known when |
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// unserializing |
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$value = $value->getId(); |
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} else { |
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// The parameter is an abstract model class, we need to |
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// store the model's type as well |
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$value = array( |
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'id' => $value->getId(), |
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'type' => get_class($value) |
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); |
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} |
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} |
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$data[$property->getName()] = $value; |
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} |
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return serialize($data); |
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} |
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/** |
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* Call the event's constructor using serialized data |
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* |
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* @param string $data |
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*/ |
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public function unserialize($data) |
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{ |
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$data = unserialize($data); |
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$class = new \ReflectionObject($this); |
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$params = $class->getConstructor()->getParameters(); |
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$pass = array(); |
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// Iterate through all the parameters of the constructor and try to |
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// locate the value for each one in the serialized data |
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foreach ($params as $param) { |
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if (isset($data[$param->getName()])) { |
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$value = $data[$param->getName()]; |
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// If the serialized data contained a model's ID (and type), |
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// pass a new instance of it |
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if ($this->isModel($param)) { |
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if (!$param->getClass()->isAbstract()) { |
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$value = $param->getClass() |
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->getMethod('get') |
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->invoke(null, $value); |
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} else { |
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$id = $value['id']; |
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$type = $value['type']; |
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$value = call_user_func(array($type, 'get'), $id); |
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} |
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} |
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} else { |
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$value = null; |
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} |
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$pass[$param->getName()] = $value; |
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} |
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$class->getConstructor()->invokeArgs($this, $pass); |
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} |
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/** |
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* Find out if the specified parameter of the Event's constructor needs a |
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* Model |
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* |
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* @param \ReflectionParameter $param The constructor's parameter |
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* @return bool |
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*/ |
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private static function isModel($param) |
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{ |
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$class = $param->getClass(); |
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if ($class === null) { |
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return false; |
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} |
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if ($class->isSubclassOf('\Model')) { |
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return true; |
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} |
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if ($class->getName() === 'Model') { |
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return true; |
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} |
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return false; |
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} |
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/** |
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* Send a notification to the players affected by this event |
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* |
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* @param string $type The type of the event |
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*/ |
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public function notify($type) |
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{ |
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} |
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/** |
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* Sends a notification to some players |
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* |
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* @param mixed $players A single player/ID or a player/ID list |
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* @param string $type The type of the event |
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* @param null|\Player|int $except A player who should not receive a notification |
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* @param \Player $except |
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*/ |
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protected function doNotify($players, $type, $except = null) |
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{ |
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Debug::log("Notifying about $type", array( |
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'players' => $players, |
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'except' => $except |
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)); |
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if ($except instanceof \Player) { |
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$except = $except->getId(); |
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} |
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if (!is_array($players)) { |
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$players = array($players); |
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} |
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foreach ($players as $player) { |
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if ($player instanceof \Player) { |
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$player = $player->getId(); |
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} |
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if ($player != $except) { |
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$notification = \Notification::newNotification($player, $type, $this); |
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\Service::getContainer()->get('event_dispatcher')->dispatch( |
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Events::NOTIFICATION_NEW, |
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new NewNotificationEvent($notification) |
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); |
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} |
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} |
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} |
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} |
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