<?php

namespace core;

/**
 * Requires utils.php to be loaded before
 */

/**
 * Autoloading function
 *
 * @param \string $class_name Name of the class (with namespace)
 *
 * @throws \Exception
 */
function load_class(string $class_name) : void
{
	$path = 'class' . \DIRECTORY_SEPARATOR . # WARNING: hard-coded path
		\str_replace('\\', \DIRECTORY_SEPARATOR, $class_name) .
		'.class.php';

	if (\is_file($path))
	{
		require_once($path);
	}
	else
	{
		throw new \Exception(\core\substitute(
			'the class {class} cannot be found in the path {path}',
			array('class' => $class_name, 'path' => $path),
		));
	}
}

/**
 * Check if the given string is a class name
 *
 * Use definition here: https://www.php.net/manual/en/language.oop5.basic.php
 * I don't use regex because they don't seems to work well
 *
 * @param \string $value
 *
 * @return \bool
 */
function is_class_name(string $value) : bool
{
	$parts = \explode('\\', $value);
	foreach ($parts as $part)
	{
		if (\in_array(
			$part, 
			array(
				'__halt_compiler', # defined here: https://www.php.net/manual/en/reserved.keywords.php
				'abstract',
				'and',
				'array',
				'as',
				'break',
				'callable',
				'case',
				'catch',
				'class',
				'clone',
				'const',
				'continue',
				'declare',
				'default',
				'die',
				'do',
				'echo',
				'else',
				'elseif',
				'empty',
				'enddeclare',
				'endfor',
				'endforeach',
				'endif',
				'endswitch',
				'endwhile',
				'eval',
				'exit',
				'extends',
				'final',
				'finally',
				'fn',
				'for',
				'foreach',
				'function',
				'global',
				'goto',
				'if',
				'implements',
				'include',
				'include_once',
				'instanceof',
				'insteadof',
				'interface',
				'isset',
				'list',
				'match',
				'namespace',
				'new',
				'or',
				'print',
				'private',
				'protected',
				'public',
				'readonly',
				'require',
				'require_once',
				'return',
				'static',
				'switch',
				'throw',
				'trait',
				'try',
				'unset',
				'use',
				'var',
				'while',
				'xor',
				'yield',
				'yield from', # contains a space so will not work even if not here, but still here because why not
				'__CLASS__',
				'__DIR__',
				'__FILE__',
				'__FUNCTION__',
				'__LINE__',
				'__METHOD__',
				'__NAMESPACE__',
				'__TRAIT__',
				'Directory', # defined here: https://www.php.net/manual/en/reserved.classes.php
				'stdClass',
				'__PHP_incomplete_Class',
				'Exception',
				'ErrorException',
				'php_user_filter',
				'Closure',
				'Generator',
				'ArithmeticError',
				'AssertionError',
				'DivisionByZeroError',
				'Error',
				'Throwable',
				'ParseError',
				'TypeError',
				'self',
				'parent',
				'int', # defined here: https://www.php.net/manual/en/reserved.other-reserved-words.php
				'float',
				'bool',
				'string',
				'true',
				'false',
				'null',
				'void',
				'iterable',
				'object',
				'mixed',
				'never',
			),
		))
		{
			return False;
		}
		if (\in_array($part[0], array(
			'1', '2', '3', '4', '5', '6', '7', '8', '9',
		)))
		{
			return False;
		}
		foreach (\str_split($part) as $char)
		{
			if (\in_array(
				$char,
				array(
					'$', # misc
					'#',
					'@',
					',',
					'.',
					':',
					';',
					'`', # string
					'\'',
					'"',
					'&', # operator
					'|',
					'+',
					'-',
					'*',
					'.',
					'/',
					'%',
					'^',
					'=',
					'~',
					'?',
					'!',
					'{', # delimiter
					'(',
					'[',
					']',
					')',
					'}',
					'	', # whitespace
					' ',
					'',
					'',
					'',
					' ',
					'',
					' ',
					' ',
					'᠎',
					' ',
					' ',
					' ',
					' ',
					' ',
					' ',
					' ',
					' ',
					' ',
					' ',
					' ',
					'​',
					'‌',
					'‍',
					' ',
					' ',
					' ',
					' ',
					'⁠',
					'　',
					'﻿',
				)
			))
			{
				return False;
			}
		}
	}
	return True;
}

?>