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<?php |
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namespace Z38\SwissPayment; |
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use DOMDocument; |
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use InvalidArgumentException; |
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/** |
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* PostalAccount holds details about a PostFinance account |
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*/ |
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class PostalAccount implements AccountInterface |
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{ |
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const PATTERN = '/^[0-9]{2}-[1-9][0-9]{0,5}-[0-9]$/'; |
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/** |
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* @var int |
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*/ |
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protected $prefix; |
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/** |
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* @var int |
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*/ |
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protected $number; |
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/** |
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* @var int |
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*/ |
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protected $checkDigit; |
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/** |
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* Constructor |
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* |
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* @param string $postalAccount |
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* |
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* @throws InvalidArgumentException When the account number is not valid. |
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*/ |
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public function __construct($postalAccount) |
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{ |
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if (!preg_match(self::PATTERN, $postalAccount)) { |
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throw new InvalidArgumentException('Postal account number is not properly formatted.'); |
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} |
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$parts = explode('-', $postalAccount); |
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if (!self::validateCheckDigit(sprintf('%02s%06s%s', $parts[0], $parts[1], $parts[2]))) { |
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throw new InvalidArgumentException('Postal account number has an invalid check digit.'); |
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} |
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$this->prefix = (int) $parts[0]; |
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$this->number = (int) $parts[1]; |
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$this->checkDigit = (int) $parts[2]; |
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} |
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/** |
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* Format the postal account number |
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* |
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* @return string The formatted account number |
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*/ |
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public function format() |
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{ |
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return sprintf('%02d-%d-%d', $this->prefix, $this->number, $this->checkDigit); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function asDom(DOMDocument $doc) |
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{ |
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$root = $doc->createElement('Id'); |
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$other = $doc->createElement('Othr'); |
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$other->appendChild($doc->createElement('Id', $this->format())); |
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$root->appendChild($other); |
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return $root; |
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} |
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/** |
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* @internal |
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*/ |
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public static function validateCheckDigit($number) |
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{ |
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$lookup = [0, 9, 4, 6, 8, 2, 7, 1, 3, 5]; |
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$carry = 0; |
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for ($i = 0; $i < strlen($number) - 1; $i++) { |
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$carry = $lookup[($carry + $number[$i]) % 10]; |
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} |
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return (10 - $carry) % 10 === (int) $number[strlen($number) - 1]; |
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} |
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} |
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If you have a function call in the test part of a
for
loop, this function is executed on each iteration. Often such a function, can be moved to the initialization part and be cached.