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<?php |
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/** |
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* Allows input of credit card numbers via four separate form fields, |
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* including generic validation of its numeric values. |
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* |
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* @todo Validate |
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* |
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* @package forms |
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* @subpackage fields-formattedinput |
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*/ |
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class CreditCardField extends TextField { |
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/** |
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* Add default attributes for use on all inputs. |
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* |
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* @return array List of attributes |
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*/ |
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public function getAttributes() { |
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return array_merge( |
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parent::getAttributes(), |
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array( |
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'autocomplete' => 'off', |
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'maxlength' => 4, |
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'size' => 4 |
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) |
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); |
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} |
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public function Field($properties = array()) { |
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$parts = $this->arrayValue(); |
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$properties['ValueOne'] = $parts[0]; |
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$properties['ValueTwo'] = $parts[1]; |
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$properties['ValueThree'] = $parts[2]; |
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$properties['ValueFour'] = $parts[3]; |
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return parent::Field($properties); |
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} |
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/** |
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* Get tabindex HTML string |
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* |
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* @param int $increment Increase current tabindex by this value |
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* @return string |
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*/ |
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public function getTabIndexHTML($increment = 0) { |
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// we can't add a tabindex if there hasn't been one set yet. |
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if($this->getAttribute('tabindex') === null) return false; |
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$tabIndex = (int)$this->getAttribute('tabindex') + (int)$increment; |
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return (is_numeric($tabIndex)) ? ' tabindex = "' . $tabIndex . '"' : ''; |
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} |
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public function dataValue() { |
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if(is_array($this->value)) { |
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return implode("", $this->value); |
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} else { |
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return $this->value; |
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} |
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} |
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/** |
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* Get either list of values, or null |
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* |
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* @return array |
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*/ |
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public function arrayValue() { |
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if (is_array($this->value)) { |
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return $this->value; |
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} |
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$value = $this->dataValue(); |
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return $this->parseCreditCard($value); |
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} |
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/** |
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* Parse credit card value into list of four four-digit values |
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* |
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* @param string $value |
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* @return array|null |
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*/ |
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protected function parseCreditCard($value) { |
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if(preg_match("/([0-9]{4})([0-9]{4})([0-9]{4})([0-9]{4})/", $value, $parts)) { |
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return [ $parts[1], $parts[2], $parts[3], $parts[4] ]; |
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} |
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return null; |
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} |
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public function validate($validator){ |
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$value = $this->dataValue(); |
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if(empty($value)) { |
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return true; |
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} |
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// Check if format is valid |
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if ($this->parseCreditCard($value)) { |
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return true; |
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} |
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// Format is invalid |
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$validator->validationError( |
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$this->name, |
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_t( |
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'Form.VALIDATIONCREDIT', |
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"Please ensure you have entered the credit card number correctly" |
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), |
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"validation" |
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); |
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return false; |
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} |
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} |
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silverstripe /
silverstripe-framework
