Webform module and config export

web/modules/contrib/webform/src/Element/WebformCreditCardNumber.php

@@ -0,0 +1,122 @@
+<?php
+
+namespace Drupal\webform\Element;
+
+use Drupal\Core\Render\Element;
+use Drupal\Core\Render\Element\FormElement;
+use Drupal\Core\Form\FormStateInterface;
+
+/**
+ * Provides a webform element for entering a credit card number.
+ *
+ * @FormElement("webform_creditcard_number")
+ */
+class WebformCreditCardNumber extends FormElement {
+
+  /**
+   * Defines the max length for an credit card number.
+   */
+  const CREDITCARD_MAX_LENGTH = 16;
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getInfo() {
+    $class = get_class($this);
+    return [
+      '#input' => TRUE,
+      '#size' => self::CREDITCARD_MAX_LENGTH,
+      '#maxlength' => self::CREDITCARD_MAX_LENGTH,
+      '#autocomplete_route_name' => FALSE,
+      '#process' => [
+        [$class, 'processAutocomplete'],
+        [$class, 'processAjaxForm'],
+        [$class, 'processPattern'],
+      ],
+      '#element_validate' => [
+        [$class, 'validateWebformCreditCardNumber'],
+      ],
+      '#pre_render' => [
+        [$class, 'preRenderWebformCreditCardNumber'],
+      ],
+      '#theme' => 'input__creditcard_number',
+      '#theme_wrappers' => ['form_element'],
+    ];
+  }
+
+  /**
+   * Webform element validation handler for #type 'creditcard_number'.
+   */
+  public static function validateWebformCreditCardNumber(&$element, FormStateInterface $form_state, &$complete_form) {
+    $value = trim($element['#value']);
+    $form_state->setValueForElement($element, $value);
+
+    if ($value !== '' && !self::validCreditCardNumber($value)) {
+      $form_state->setError($element, t('The credit card number is not valid.'));
+    }
+  }
+
+  /**
+   * Validation rule for credit card number.
+   *
+   * Luhn algorithm number checker - (c) 2005-2008 shaman - www.planzero.org
+   * This code has been released into the public domain, however please
+   * give credit to the original author where possible.
+   *
+   * @param string $number
+   *   A credit card number.
+   *
+   * @return bool
+   *   TRUE is credit card number is valid.
+   *
+   * @see: http://stackoverflow.com/questions/174730/what-is-the-best-way-to-validate-a-credit-card-in-php
+   */
+  public static function validCreditCardNumber($number) {
+    // If number is not 15 or 16 digits return FALSE.
+    if (!preg_match('/^\d{15,16}$/', $number)) {
+      return FALSE;
+    }
+
+    // Set the string length and parity.
+    $number_length = strlen($number);
+    $parity = $number_length % 2;
+
+    // Loop through each digit and do the maths.
+    $total = 0;
+    for ($i = 0; $i < $number_length; $i++) {
+      $digit = $number[$i];
+      // Multiply alternate digits by two.
+      if ($i % 2 == $parity) {
+        $digit *= 2;
+        // If the sum is two digits, add them together (in effect).
+        if ($digit > 9) {
+          $digit -= 9;
+        }
+      }
+      // Total up the digits.
+      $total += $digit;
+    }
+
+    // If the total mod 10 equals 0, the number is valid.
+    return ($total % 10 == 0) ? TRUE : FALSE;
+  }
+
+  /**
+   * Prepares a #type 'creditcard_number' render element for theme_element().
+   *
+   * @param array $element
+   *   An associative array containing the properties of the element.
+   *   Properties used: #title, #value, #description, #size, #maxlength,
+   *   #placeholder, #required, #attributes.
+   *
+   * @return array
+   *   The $element with prepared variables ready for theme_element().
+   */
+  public static function preRenderWebformCreditCardNumber(array $element) {
+    $element['#attributes']['type'] = 'text';
+    Element::setAttributes($element, ['id', 'name', 'value', 'size', 'maxlength', 'placeholder']);
+    static::setAttributes($element, ['form-textfield', 'form-creditcard-number']);
+    return $element;
+  }
+
+}