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<?php |
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declare(strict_types=1); |
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namespace Application\Service; |
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use Exception; |
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/** |
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* Class to generate BVR reference number and encoding lines. |
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* |
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* Typically usage would one of the following: |
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* |
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* ```php |
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* <?php |
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* |
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* // Provided by your bank |
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* $bankAccount = '800876'; |
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* $postAccount = '01-3456-0'; |
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* |
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* // Your own custom ID to uniquely identify the payment |
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* $myId = (string) $user->getId(); |
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* |
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* $referenceNumberToCopyPasteInEBanking = Bvr::getReferenceNumber($bankAccount, $myId); |
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* |
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* // OR get encoding line |
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* $amount = '19.95'; |
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* $encodingLineToCopyPasteInEBanking = Bvr::getEncodingLine($bankAccount, $myId, $postAccount, $amount); |
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* ``` |
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* |
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* @see https://www.postfinance.ch/content/dam/pfch/doc/cust/download/inpayslip_isr_man_fr.pdf |
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*/ |
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class Bvr |
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{ |
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private const TABLE = [ |
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[0, 9, 4, 6, 8, 2, 7, 1, 3, 5], |
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[9, 4, 6, 8, 2, 7, 1, 3, 5, 0], |
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[4, 6, 8, 2, 7, 1, 3, 5, 0, 9], |
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[6, 8, 2, 7, 1, 3, 5, 0, 9, 4], |
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[8, 2, 7, 1, 3, 5, 0, 9, 4, 6], |
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[2, 7, 1, 3, 5, 0, 9, 4, 6, 8], |
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[7, 1, 3, 5, 0, 9, 4, 6, 8, 2], |
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[1, 3, 5, 0, 9, 4, 6, 8, 2, 7], |
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[3, 5, 0, 9, 4, 6, 8, 2, 7, 1], |
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[5, 0, 9, 4, 6, 8, 2, 7, 1, 3], |
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]; |
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/** |
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* Get the reference number, including the verification digit |
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* |
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* @param string $bankAccount |
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* @param string $customId |
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* |
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* @return string |
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*/ |
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public static function getReferenceNumber(string $bankAccount, string $customId): string |
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{ |
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if (!preg_match('~^\d{0,20}$~', $customId)) { |
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throw new Exception('Invalid custom ID. It must be 20 or less digits, but got: `' . $customId . '`'); |
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} |
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if (!preg_match('~^\d{6}$~', $bankAccount)) { |
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1 |
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throw new Exception('Invalid bank account. It must be exactly 6 digits, but got: `' . $bankAccount . '`'); |
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} |
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$value = $bankAccount . self::pad($customId, 20); |
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return $value . self::modulo10($value); |
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} |
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/** |
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* Get the full encoding line |
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* |
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* @param string $bankAccount |
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* @param string $customId |
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* @param string $postAccount |
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* @param null|string $amount |
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* |
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* @return string |
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*/ |
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public static function getEncodingLine(string $bankAccount, string $customId, string $postAccount, ?string $amount = null): string |
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{ |
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$type = self::getType($amount); |
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$referenceNumber = self::getReferenceNumber($bankAccount, $customId); |
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$formattedPostAccount = self::getPostAccount($postAccount); |
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$result = |
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3 |
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$type . '>' |
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. $referenceNumber . '+ ' |
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. $formattedPostAccount . '>'; |
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return $result; |
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} |
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private static function pad(string $string, int $length): string |
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{ |
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return str_pad($string, $length, '0', STR_PAD_LEFT); |
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} |
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public static function modulo10(string $number): int |
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{ |
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$report = 0; |
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if ($number === '') { |
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1 |
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return $report; |
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} |
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foreach (str_split($number) as $value) { |
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$report = self::TABLE[$report][$value]; |
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} |
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return (10 - $report) % 10; |
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} |
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private static function getPostAccount(string $postAccount): string |
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{ |
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5 |
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if (!preg_match('~^(\d+)-(\d+)-(\d)$~', $postAccount, $m)) { |
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1 |
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throw new Exception('Invalid post account number, got `' . $postAccount . '`'); |
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} |
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$participantNumber = self::pad($m[1], 2) . self::pad($m[2], 6) . $m[3]; |
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4 |
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if (mb_strlen($participantNumber) !== 9) { |
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throw new Exception('The post account number is too long, got `' . $postAccount . '`'); |
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} |
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return $participantNumber; |
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} |
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/** |
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* Get type of document and amount |
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* |
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* @param null|string $amount |
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* |
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* @return string |
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*/ |
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private static function getType(?string $amount): string |
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{ |
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if ($amount === null) { |
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$type = '04'; |
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} elseif (is_numeric($amount)) { |
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$cents = bcmul($amount, '100', 0); |
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$type = '01' . self::pad($cents, 10); |
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} else { |
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throw new Exception('Invalid amount. Must be numeric, but got: `' . $amount . '`'); |
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} |
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return $type . self::modulo10($type); |
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} |
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} |
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Ecodev /
my-ichtus
