StringToTParser.php

<?php
 
/*
 *
 *  ____            _        _   __  __ _                  __  __ ____
 * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
 * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
 * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
 * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * @author PocketMine Team
 * @link http://www.pocketmine.net/
 *
 *
 */
 
declare(strict_types=1);
 
namespace pocketmine\utils;
 
use function array_keys;
use function str_replace;
use function strtolower;
use function trim;
 
abstract class StringToTParser{
 
    private array $callbackMap = [];
 
    public function register(string $alias, \Closure $callback) : void{
        $key = $this->reprocess($alias);
        if(isset($this->callbackMap[$key])){
            throw new \InvalidArgumentException("Alias \"$key\" is already registered");
        }
        $this->callbackMap[$key] = $callback;
    }
 
    public function override(string $alias, \Closure $callback) : void{
        $this->callbackMap[$this->reprocess($alias)] = $callback;
    }
 
    public function registerAlias(string $existing, string $alias) : void{
        $existingKey = $this->reprocess($existing);
        if(!isset($this->callbackMap[$existingKey])){
            throw new \InvalidArgumentException("Cannot register new alias for unknown existing alias \"$existing\"");
        }
        $newKey = $this->reprocess($alias);
        if(isset($this->callbackMap[$newKey])){
            throw new \InvalidArgumentException("Alias \"$newKey\" is already registered");
        }
        $this->callbackMap[$newKey] = $this->callbackMap[$existingKey];
    }
 
    public function parse(string $input){
        $key = $this->reprocess($input);
        if(isset($this->callbackMap[$key])){
            return ($this->callbackMap[$key])($input);
        }
 
        return null;
    }
 
    protected function reprocess(string $input) : string{
        return strtolower(str_replace([" ", "minecraft:"], ["_", ""], trim($input)));
    }
 
    public function getKnownAliases() : array{
        return array_keys($this->callbackMap);
    }
}