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EventManager.php
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EventManager.php
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<?php
// @todo Should be a code template, not a service
/** @todo implement priority groups
* 'first' - special phrase to set hook before all
* 0 - 100 ('crutch') - crutches and reserve
* 100 - 199 ('security') - security
* 200 - 299 ('regular') - base logic (default)
* 'last' - special phrase to set hook after all
*/
namespace Safronik\CodePatterns\Behavioral;
use Safronik\CodePatterns\Exceptions\EventManagerException;
use Safronik\CodePatterns\Generative\Singleton;
/**
* Event manager
*
*
*
* @author Roman safronov
* @version 1.0.0
*/
class EventManager
{
use Singleton;
private array $events = [];
private array $allowed_types = [
'before',
'after',
'filter_input',
'filter_output',
];
public static function hook( string $class, string $event, $type, callable $callback ): void
{
self::getInstance()->create( $type, $event, $callback );
}
public static function filterInput( string $class, string $event, callable $callback ): void
{
self::getInstance()->create( 'filter_input', "$class:$event", $callback );
}
public static function before( string $class, string $event, callable $callback ): void
{
self::getInstance()->create( 'before', "$class:$event", $callback );
}
public static function after( string $class, string $event, callable $callback ): void
{
self::getInstance()->create( 'after', "$class:$event", $callback );
}
public static function filterOutput( string $class, string $event, callable $callback ): void
{
self::getInstance()->create( 'filter_output', "$class:$event", $callback );
}
private function create( string $type, string $event, callable $callback, int $priority = 200 )
{
! in_array( $type, $this->allowed_types, true)
&& throw new EventManagerException( 'EventManager type is not valid: ' . $type );
$this->events[ $event ][ $type ][ $priority ] = $callback;
}
public static function triggerFilterInput( string $event, array $arguments ): mixed
{
return self::getInstance()->exists( 'filter_input', $event )
? self::getInstance()->trigger( 'filter_input', $event, ...$arguments )
: $arguments;
}
public static function triggerBefore( string $event ): void
{
if( self::getInstance()->exists( 'before', $event ) ){
self::getInstance()->trigger( 'before', $event );
}
}
public static function triggerAfter( string $event ): void
{
if( self::getInstance()->exists( 'after', $event ) ){
self::getInstance()->trigger( 'after', $event );
}
}
public static function triggerFilterOutput( string $event, mixed $return_value ): mixed
{
return self::getInstance()->exists( 'filter_output', $event )
? self::getInstance()->trigger( 'filter_output', $event, $return_value )
: $return_value;
}
public static function triggerCustom( string $event ): void
{
if( self::getInstance()->exists( 'custom', $event ) ){
self::getInstance()->trigger( 'custom', $event );
}
}
private function exists( string $type, string $event ): bool
{
return isset( $this->events[ $event ][ $type ] );
}
private function trigger( string $type, string $event, ...$params ): mixed
{
return $this->events[ $event ][ $type ]( ...$params );
}
}