ErrorToExceptionHandler.php

<?php
 
/*
 * PocketMine Standard PHP Library
 * Copyright (C) 2019 PocketMine Team <https://github.com/pmmp/PocketMine-SPL>
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
*/
 
declare(strict_types=1);
 
namespace pocketmine\errorhandler;
 
use function error_reporting;
use function restore_error_handler;
use function set_error_handler;
use const E_NOTICE;
use const E_WARNING;
 
final class ErrorToExceptionHandler{
    private function __construct(){
 
    }
 
    private static $lastSilencedError = null;
 
    public static function handle(int $severity, string $message, string $file, int $line) : bool{
        if((error_reporting() & $severity) !== 0){
            throw new \ErrorException($message, 0, $severity, $file, $line);
        }
 
        self::$lastSilencedError = new ErrorRecord($severity, $message, $file, $line);
        return true; //stfu operator
    }
 
    public static function getLastSilencedError() : ErrorRecord{
        if(self::$lastSilencedError === null){
            throw new \LogicException("No error has been generated");
        }
        return self::$lastSilencedError;
    }
 
    public static function clearLastSilencedError() : void{
        self::$lastSilencedError = null;
    }
 
    public static function getAndClearLastSilencedError() : ErrorRecord{
        $result = self::getLastSilencedError();
        self::clearLastSilencedError();
        return $result;
    }
 
    public static function set(int $levels = E_WARNING | E_NOTICE) : void{
        set_error_handler([self::class, 'handle'], $levels);
    }
 
    private static function throwAll() : \Closure{
        return function(int $severity, string $message, string $file, int $line): bool{
            throw new \ErrorException($message, 0, $severity, $file, $line);
        };
    }
 
    public static function trap(\Closure $closure, int $levels = E_WARNING | E_NOTICE){
        set_error_handler(self::throwAll(), $levels);
        try{
            return $closure();
        }finally{
            restore_error_handler();
        }
    }
 
    public static function trapAndRemoveFalse(\Closure $closure, int $levels = E_WARNING | E_NOTICE){
        set_error_handler(self::throwAll(), $levels);
        try{
            $result = $closure();
            if($result === false){
                throw new \LogicException("Block must not return false when no error occurred. Use trap() if the block may return false.");
            }
            return $result;
        }finally{
            restore_error_handler();
        }
    }
}