function Datelist::valueCallback

Validates the date type to adjust 12 hour time and prevent invalid dates. If the date is valid, the date is set in the form.

Overrides FormElement::valueCallback

File

core/lib/Drupal/Core/Datetime/Element/Datelist.php, line 46

Class

Datelist

Provides a datelist element.

Namespace

Code

public static function valueCallback(&$element, $input, FormStateInterface $form_state) {
    $parts = $element['#date_part_order'];
    $increment = $element['#date_increment'];
    $date = NULL;
    if ($input !== FALSE) {
        $return = $input;
        if (empty(static::checkEmptyInputs($input, $parts))) {
            if (isset($input['ampm'])) {
                if ($input['ampm'] == 'pm' && $input['hour'] < 12) {
                    $input['hour'] += 12;
                }
                elseif ($input['ampm'] == 'am' && $input['hour'] == 12) {
                    $input['hour'] -= 12;
                }
                unset($input['ampm']);
            }
            try {
                $date = DrupalDateTime::createFromArray($input, $element['#date_timezone']);
            } catch (\Exception $e) {
                $form_state->setError($element, t('Selected combination of day and month is not valid.'));
            }
            if ($date instanceof DrupalDateTime && !$date->hasErrors()) {
                static::incrementRound($date, $increment);
            }
        }
    }
    else {
        $return = array_fill_keys($parts, '');
        if (!empty($element['#default_value'])) {
            $date = $element['#default_value'];
            if ($date instanceof DrupalDateTime && !$date->hasErrors()) {
                $date->setTimezone(new \DateTimeZone($element['#date_timezone']));
                static::incrementRound($date, $increment);
                foreach ($parts as $part) {
                    switch ($part) {
                        case 'day':
                            $format = 'j';
                            break;
                        case 'month':
                            $format = 'n';
                            break;
                        case 'year':
                            $format = 'Y';
                            break;
                        case 'hour':
                            $format = in_array('ampm', $element['#date_part_order']) ? 'g' : 'G';
                            break;
                        case 'minute':
                            $format = 'i';
                            break;
                        case 'second':
                            $format = 's';
                            break;
                        case 'ampm':
                            $format = 'a';
                            break;
                        default:
                            $format = '';
                    }
                    $return[$part] = $date->format($format);
                }
            }
        }
    }
    $return['object'] = $date;
    return $return;
}