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<?php
namespace Drupal\Core\Render\Element;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Render\Element;
/**
* Provides a form element for date selection.
*
* Properties:
* - #default_value: An array with the keys: 'year', 'month', and 'day'.
* Defaults to the current date if no value is supplied.
* - #size: The size of the input element in characters.
*
* @code
* $form['expiration'] = array(
* '#type' => 'date',
* '#title' => $this->t('Content expiration'),
* '#default_value' => array('year' => 2020, 'month' => 2, 'day' => 15,)
* );
* @endcode
*
* @FormElement("date")
*/
class Date extends FormElement {
/**
* {@inheritdoc}
*/
public function getInfo() {
$class = get_class($this);
return [
'#input' => TRUE,
'#theme' => 'input__date',
'#process' => [[$class, 'processDate']],
'#pre_render' => [[$class, 'preRenderDate']],
'#theme_wrappers' => ['form_element'],
'#attributes' => ['type' => 'date'],
'#date_date_format' => 'Y-m-d',
];
}
/**
* Processes a date form element.
*
* @param array $element
* The form element to process. Properties used:
* - #attributes: An associative array containing:
* - type: The type of date field rendered.
* - #date_date_format: The date format used in PHP formats.
* @param \Drupal\Core\Form\FormStateInterface $form_state
* The current state of the form.
* @param array $complete_form
* The complete form structure.
*
* @return array
* The processed element.
*/
public static function processDate(&$element, FormStateInterface $form_state, &$complete_form) {
// Attach JS support for the date field, if we can determine which date
// format should be used.
if ($element['#attributes']['type'] == 'date' && !empty($element['#date_date_format'])) {
$element['#attached']['library'][] = 'core/drupal.date';
$element['#attributes']['data-drupal-date-format'] = [$element['#date_date_format']];
}
return $element;
}
/**
* Adds form-specific attributes to a 'date' #type element.
*
* Supports HTML5 types of 'date', 'datetime', 'datetime-local', and 'time'.
* Falls back to a plain textfield with JS datepicker support. Used as a
* sub-element by the datetime element type.
*
* @param array $element
* An associative array containing the properties of the element.
* Properties used: #title, #value, #options, #description, #required,
* #attributes, #id, #name, #type, #min, #max, #step, #value, #size. The
* #name property will be sanitized before output. This is currently done by
* initializing Drupal\Core\Template\Attribute with all the attributes.
*
* @return array
* The $element with prepared variables ready for #theme 'input__date'.
*/
public static function preRenderDate($element) {
if (empty($element['#attributes']['type'])) {
$element['#attributes']['type'] = 'date';
}
Element::setAttributes($element, ['id', 'name', 'type', 'min', 'max', 'step', 'value', 'size']);
static::setAttributes($element, ['form-' . $element['#attributes']['type']]);
return $element;
}
}