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<?php |
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namespace CfdiUtils\Utils; |
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class Rfc |
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{ |
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public const RFC_GENERIC = 'XAXX010101000'; |
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public const RFC_FOREIGN = 'XEXX010101000'; |
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public const DISALLOW_GENERIC = 1; |
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public const DISALLOW_FOREIGN = 2; |
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/** @var string */ |
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private $rfc; |
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/** @var int */ |
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private $length; |
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/** @var string contains calculated checksum */ |
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private $checkSum; |
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/** @var bool */ |
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private $checkSumMatch; |
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public function __construct(string $rfc, int $flags = 0) |
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{ |
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$this->checkIsValid($rfc, $flags); |
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$this->rfc = $rfc; |
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$this->length = mb_strlen($rfc); |
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$this->checkSum = static::obtainCheckSum($rfc); |
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$this->checkSumMatch = ($this->checkSum === strval(substr($rfc, -1))); |
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} |
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public function rfc(): string |
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{ |
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return $this->rfc; |
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} |
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public function isPerson(): bool |
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{ |
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return (13 === $this->length); |
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} |
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public function isMoral(): bool |
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{ |
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return (12 === $this->length); |
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} |
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public function isGeneric(): bool |
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{ |
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return (static::RFC_GENERIC === $this->rfc); |
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} |
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public function isForeign(): bool |
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{ |
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return (static::RFC_FOREIGN === $this->rfc); |
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} |
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public function checkSum(): string |
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{ |
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return $this->checkSum; |
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} |
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public function checkSumMatch(): bool |
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{ |
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return $this->checkSumMatch; |
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} |
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public function __toString(): string |
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{ |
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return $this->rfc(); |
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} |
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public static function isValid(string $value): bool |
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{ |
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try { |
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static::checkIsValid($value); |
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return true; |
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} catch (\UnexpectedValueException $exception) { |
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return false; |
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} |
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} |
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/** |
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* @param string $value |
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* @param int $flags |
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* @throws \UnexpectedValueException when the value is generic and is not allowed by flags |
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* @throws \UnexpectedValueException when the value is foreign and is not allowed by flags |
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* @throws \UnexpectedValueException when the value does not match with the RFC format |
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* @throws \UnexpectedValueException when the date inside the value is not valid |
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* @throws \UnexpectedValueException when the last digit does not match the checksum |
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*/ |
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public static function checkIsValid(string $value, int $flags = 0) |
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{ |
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if ($flags & static::DISALLOW_GENERIC && $value === static::RFC_GENERIC) { |
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throw new \UnexpectedValueException('No se permite el RFC genérico para público en general'); |
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} |
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if ($flags & static::DISALLOW_FOREIGN && $value === static::RFC_FOREIGN) { |
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throw new \UnexpectedValueException('No se permite el RFC genérico para operaciones con extranjeros'); |
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} |
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// validate agains a regular expression (values and length) |
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$regex = '/^' // desde el inicio |
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. '[A-ZÑ&]{3,4}' // letras y números para el nombre (3 para morales, 4 para físicas) |
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. '([0-9]{6})' // año mes y día, la validez de la fecha se comprueba después |
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. '[A-Z0-9]{2}[A0-9]{1}' // homoclave (letra o dígito 2 veces + A o dígito 1 vez) |
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. '$/u'; // hasta el final, considerar la cadena unicode |
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if (1 !== preg_match($regex, $value)) { |
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throw new \UnexpectedValueException('No coincide el formato de un RFC'); |
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} |
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if (0 === static::obtainDate($value)) { |
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throw new \UnexpectedValueException('La fecha obtenida no es lógica'); |
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} |
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} |
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public static function obtainCheckSum(string $rfc): string |
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{ |
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// 'Ñ' translated to '#' due it is multibyte 0xC3 0xB1 |
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$dictionary = array_flip(str_split('0123456789ABCDEFGHIJKLMN&OPQRSTUVWXYZ #', 1)); |
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$chars = str_split(str_replace('Ñ', '#', $rfc), 1); |
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array_pop($chars); // remove predefined checksum |
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$length = count($chars); |
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$sum = (11 === $length) ? 481 : 0; // 481 para morales, 0 para físicas |
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$j = $length + 1; |
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foreach ($chars as $i => $char) { |
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$sum += ($dictionary[$char] ?? 0) * ($j - $i); |
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} |
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$digit = strval(11 - $sum % 11); |
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if ('11' === $digit) { |
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$digit = '0'; |
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} elseif ('10' === $digit) { |
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$digit = 'A'; |
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} |
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return $digit; |
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} |
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/** |
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* The date is always from the year 2000 since RFC does not provide century and 000229 is valid. |
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* Please, change this function on year 2100! |
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* |
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* @param string $rfc |
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* @return int |
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*/ |
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public static function obtainDate(string $rfc): int |
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{ |
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// rfc is multibyte |
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$begin = (12 === mb_strlen($rfc)) ? 3 : 4; |
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// strdate is not multibyte |
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$strdate = strval(mb_substr($rfc, $begin, 6)); |
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if (6 !== strlen($strdate)) { |
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return 0; |
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} |
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$parts = str_split($strdate, 2); |
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// year 2000 is leap year (%4 & %100 & %400) |
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$date = mktime(0, 0, 0, (int) $parts[1], (int) $parts[2], (int) ('20' . $parts[0])); |
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if (false === $date) { |
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/** @codeCoverageIgnore it is unlikely to enter this block */ |
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return 0; |
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} |
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if (date('ymd', $date) !== $strdate) { |
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return 0; |
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} |
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return $date; |
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} |
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} |
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eclipxe13 /
CfdiUtils
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