112 lines
2.3 KiB
PHP
112 lines
2.3 KiB
PHP
<?php
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namespace SilverStripe\Forms;
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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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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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