1 | <?php |
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13 | abstract class CheckDigitValidator implements Validator |
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14 | { |
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15 | /** |
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16 | * @var Calculator Checksum calculator |
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17 | */ |
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18 | private $checksum; |
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19 | |||
20 | /** |
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21 | * Load checksum calculator |
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22 | * |
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23 | * @param Calculator $checksum |
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24 | */ |
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25 | public function __construct(Calculator $checksum) |
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26 | { |
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27 | $this->checksum = $checksum; |
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28 | } |
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29 | |||
30 | /** |
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31 | * Validate check digit |
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32 | * |
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33 | * @param AccountNumber $number |
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34 | * @return null |
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35 | * @throws InvalidCheckDigitException If check digit is not valid |
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36 | */ |
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37 | public function validate(AccountNumber $number) |
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38 | { |
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39 | if (!$this->checksum->isValid($this->processNumber($number))) { |
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40 | throw new InvalidCheckDigitException("Invalid check digit in $number"); |
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41 | } |
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42 | } |
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43 | |||
44 | /** |
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45 | * Get number to validate |
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46 | * |
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47 | * @param AccountNumber $number |
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48 | * @return string |
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49 | */ |
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50 | abstract protected function processNumber(AccountNumber $number); |
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51 | } |
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52 |