AbstractMapper.php
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AbstractMapper.php
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	<?php

	namespace MediaWiki\Extension\Notifications\Mapper;

	use InvalidArgumentException;
	use MediaWiki\Extension\Notifications\DbFactory;

	/**
	* Abstract mapper for model
	*/
	abstract class AbstractMapper {

	/**
	* Echo database factory
	* @var DbFactory
	*/
	protected $dbFactory;

	/**
	* Event listeners for method like insert/delete
	* @var array[]
	*/
	protected $listeners;

	public function __construct( ?DbFactory $dbFactory = null ) {
	$this->dbFactory = $dbFactory ?? DbFactory::newFromDefault();
	}

	/**
	* Attach a listener
	*
	* @param string $method Method name
	* @param string $key Identification of the callable
	* @param callable $callable
	*/
	public function attachListener( $method, $key, $callable ) {
	if ( !method_exists( $this, $method ) ) {
	throw new InvalidArgumentException( $method . ' does not exist in ' . get_class( $this ) );
	}
	if ( !isset( $this->listeners[$method] ) ) {
	$this->listeners[$method] = [];
	}

	$this->listeners[$method][$key] = $callable;
	}

	/**
	* Detach a listener
	*
	* @param string $method Method name
	* @param string $key identification of the callable
	*/
	public function detachListener( $method, $key ) {
	if ( isset( $this->listeners[$method] ) ) {
	unset( $this->listeners[$method][$key] );
	}
	}

	/**
	* Get the listener for a method
	*
	* @param string $method
	* @return callable[]
	*/
	public function getMethodListeners( $method ) {
	if ( !method_exists( $this, $method ) ) {
	throw new InvalidArgumentException( $method . ' does not exist in ' . get_class( $this ) );
	}

	return $this->listeners[$method] ?? [];
	}

	}