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<?php
namespace Drupal\datetime_range\Plugin\Field\FieldWidget;
use Drupal\Core\Datetime\DrupalDateTime;
use Drupal\Core\Field\FieldItemListInterface;
use Drupal\Core\Form\FormStateInterface;
use Drupal\datetime\Plugin\Field\FieldType\DateTimeItem;
use Drupal\datetime\Plugin\Field\FieldWidget\DateTimeWidgetBase;
use Drupal\datetime_range\Plugin\Field\FieldType\DateRangeItem;
/**
* Base class for the 'daterange_*' widgets.
*/
class DateRangeWidgetBase extends DateTimeWidgetBase {
/**
* {@inheritdoc}
*/
public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
$element = parent::formElement($items, $delta, $element, $form, $form_state);
$element['#element_validate'][] = [$this, 'validateStartEnd'];
$element['value']['#title'] = $this->t('Start date');
$element['end_value'] = [
'#title' => $this->t('End date'),
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] + $element['value'];
if ($items[$delta]->start_date) {
/** @var \Drupal\Core\Datetime\DrupalDateTime $start_date */
$start_date = $items[$delta]->start_date;
$element['value']['#default_value'] = $this->createDefaultValue($start_date, $element['value']['#date_timezone']);
}
if ($items[$delta]->end_date) {
/** @var \Drupal\Core\Datetime\DrupalDateTime $end_date */
$end_date = $items[$delta]->end_date;
$element['end_value']['#default_value'] = $this->createDefaultValue($end_date, $element['end_value']['#date_timezone']);
}
return $element;
}
/**
* {@inheritdoc}
*/
public function massageFormValues(array $values, array $form, FormStateInterface $form_state) {
// The widget form element type has transformed the value to a
// DrupalDateTime object at this point. We need to convert it back to the
// storage timezone and format.
foreach ($values as &$item) {
if (!empty($item['value']) && $item['value'] instanceof DrupalDateTime) {
/** @var \Drupal\Core\Datetime\DrupalDateTime $start_date */
$start_date = $item['value'];
switch ($this->getFieldSetting('datetime_type')) {
case DateRangeItem::DATETIME_TYPE_DATE:
// If this is a date-only field, set it to the default time so the
// timezone conversion can be reversed.
datetime_date_default_time($start_date);
$format = DATETIME_DATE_STORAGE_FORMAT;
break;
case DateRangeItem::DATETIME_TYPE_ALLDAY:
// All day fields start at midnight on the starting date, but are
// stored like datetime fields, so we need to adjust the time.
// This function is called twice, so to prevent a double conversion
// we need to explicitly set the timezone.
$start_date->setTimeZone(timezone_open(drupal_get_user_timezone()));
$start_date->setTime(0, 0, 0);
$format = DATETIME_DATETIME_STORAGE_FORMAT;
break;
default:
$format = DATETIME_DATETIME_STORAGE_FORMAT;
break;
}
// Adjust the date for storage.
$start_date->setTimezone(new \DateTimezone(DATETIME_STORAGE_TIMEZONE));
$item['value'] = $start_date->format($format);
}
if (!empty($item['end_value']) && $item['end_value'] instanceof DrupalDateTime) {
/** @var \Drupal\Core\Datetime\DrupalDateTime $end_date */
$end_date = $item['end_value'];
switch ($this->getFieldSetting('datetime_type')) {
case DateRangeItem::DATETIME_TYPE_DATE:
// If this is a date-only field, set it to the default time so the
// timezone conversion can be reversed.
datetime_date_default_time($end_date);
$format = DATETIME_DATE_STORAGE_FORMAT;
break;
case DateRangeItem::DATETIME_TYPE_ALLDAY:
// All day fields end at midnight on the end date, but are
// stored like datetime fields, so we need to adjust the time.
// This function is called twice, so to prevent a double conversion
// we need to explicitly set the timezone.
$end_date->setTimeZone(timezone_open(drupal_get_user_timezone()));
$end_date->setTime(23, 59, 59);
$format = DATETIME_DATETIME_STORAGE_FORMAT;
break;
default:
$format = DATETIME_DATETIME_STORAGE_FORMAT;
break;
}
// Adjust the date for storage.
$end_date->setTimezone(new \DateTimezone(DATETIME_STORAGE_TIMEZONE));
$item['end_value'] = $end_date->format($format);
}
}
return $values;
}
/**
* #element_validate callback to ensure that the start date <= the end date.
*
* @param array $element
* An associative array containing the properties and children of the
* generic form element.
* @param \Drupal\Core\Form\FormStateInterface $form_state
* The current state of the form.
* @param array $complete_form
* The complete form structure.
*/
public function validateStartEnd(array &$element, FormStateInterface $form_state, array &$complete_form) {
$start_date = $element['value']['#value']['object'];
$end_date = $element['end_value']['#value']['object'];
if ($start_date instanceof DrupalDateTime && $end_date instanceof DrupalDateTime) {
if ($start_date->getTimestamp() !== $end_date->getTimestamp()) {
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$interval = $start_date->diff($end_date);
if ($interval->invert === 1) {
$form_state->setError($element, $this->t('The @title end date cannot be before the start date', ['@title' => $element['#title']]));
}
}
}
}
/**
* Creates a date object for use as a default value.
*
* This will take a default value, apply the proper timezone for display in
* a widget, and set the default time for date-only fields.
*
* @param \Drupal\Core\Datetime\DrupalDateTime $date
* The UTC default date.
* @param string $timezone
* The timezone to apply.
*
* @return \Drupal\Core\Datetime\DrupalDateTime
* A date object for use as a default value in a field widget.
*/
protected function createDefaultValue($date, $timezone) {
// The date was created and verified during field_load(), so it is safe to
// use without further inspection.
if ($this->getFieldSetting('datetime_type') == DateTimeItem::DATETIME_TYPE_DATE) {
// A date without time will pick up the current time, use the default
// time.
datetime_date_default_time($date);
}
$date->setTimezone(new \DateTimeZone($timezone));
return $date;
}
}