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<?php
namespace Drupal\Core\Datetime;
use Drupal\Core\StringTranslation\StringTranslationTrait;
use Drupal\Core\Template\Attribute;
/**
* Preprocess for common/core theme templates.
*
* @internal
*/
class DatePreprocess {
use StringTranslationTrait;
public function __construct(
protected DateFormatterInterface $dateFormatter,
) {
}
/**
* Prepares variables for time templates.
*
* Default template: time.html.twig.
*
* @param array $variables
* An associative array possibly containing:
* - "attributes['timestamp']:".
* - "timestamp:".
* - "text:".
*/
public function preprocessTime(array &$variables): void {
// Format the 'datetime' attribute based on the timestamp.
// @see https://www.w3.org/TR/html5-author/the-time-element.html#attr-time-datetime
if (!isset($variables['attributes']['datetime']) && isset($variables['timestamp'])) {
$variables['attributes']['datetime'] = $this->dateFormatter->format($variables['timestamp'], 'html_datetime', '', 'UTC');
}
// If no text was provided, try to auto-generate it.
if (!isset($variables['text'])) {
// Format and use a human-readable version of the timestamp, if any.
if (isset($variables['timestamp'])) {
$variables['text'] = $this->dateFormatter->format($variables['timestamp']);
}
// Otherwise, use the literal datetime attribute.
elseif (isset($variables['attributes']['datetime'])) {
$variables['text'] = $variables['attributes']['datetime'];
}
}
}
/**
* Prepares variables for datetime form element templates.
*
* The datetime form element serves as a wrapper around the date element type,
* which creates a date and a time component for a date.
*
* Default template: datetime-form.html.twig.
*
* @param array $variables
* An associative array containing:
* - element: An associative array containing the properties of the element.
* Properties used: #title, #value, #options, #description, #required,
* #attributes.
*
* @see form_process_datetime()
*/
public function preprocessDatetimeForm(array &$variables): void {
$element = $variables['element'];
$variables['attributes'] = [];
if (isset($element['#id'])) {
$variables['attributes']['id'] = $element['#id'];
}
if (!empty($element['#attributes']['class'])) {
$variables['attributes']['class'] = (array) $element['#attributes']['class'];
}
$variables['content'] = $element;
}
/**
* Prepares variables for datetime form wrapper templates.
*
* Default template: datetime-wrapper.html.twig.
*
* @param array $variables
* An associative array containing:
* - element: An associative array containing the properties of the element.
* Properties used: #title, #children, #required, #attributes.
*/
public function preprocessDatetimeWrapper(array &$variables): void {
$element = $variables['element'];
if (!empty($element['#title'])) {
$variables['title'] = $element['#title'];
// If the element title is a string, wrap it a render array so that markup
// will not be escaped (but XSS-filtered).
if (is_string($variables['title']) && $variables['title'] !== '') {
$variables['title'] = ['#markup' => $variables['title']];
}
}
// Suppress error messages.
$variables['errors'] = NULL;
$variables['description'] = NULL;
if (!empty($element['#description'])) {
$description_attributes = [];
if (!empty($element['#id'])) {
$description_attributes['id'] = $element['#id'] . '--description';
}
$description_attributes['data-drupal-field-elements'] = 'description';
$variables['description'] = $element['#description'];
$variables['description_attributes'] = new Attribute($description_attributes);
}
$variables['required'] = FALSE;
// For required datetime fields 'form-required' & 'js-form-required' classes
// are appended to the label attributes.
if (!empty($element['#required'])) {
$variables['required'] = TRUE;
}
$variables['content'] = $element['#children'];
}
}
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