function date_combo_validate

Validate and update a combo element.

Don't try this if there were errors before reaching this point.

File

core/modules/date/date.elements.inc, line 1584

Date forms and form themes and validation.

Code

function date_combo_validate($element, &$form_state) {
  // Disabled and hidden elements won't have any input and don't need validation,
  // we just need to re-save the original values, from before they were processed into
  // widget arrays and timezone-adjusted.
  if (date_hidden_element($element) || !empty($element['#disabled'])) {
    form_set_value($element, $element['#date_items'], $form_state);
    return;
  }

  $field_name = $element['#field_name'];
  $delta = $element['#delta'];

  // Related issue: https://drupal.org/node/2279831.
  if (!is_array($element['#field_parents'])) {
    $element['#field_parents'] = array();
  }
  $form_input = backdrop_array_get_nested_value($form_state['input'], $element['#field_parents']);

  // If the whole field is empty and that's OK, stop now.
  if (empty($form_input[$field_name]) && !$element['#required']) {
    return;
  }

  $item = backdrop_array_get_nested_value($form_state['values'], $element['#parents']);
  $posted = backdrop_array_get_nested_value($form_state['input'], $element['#parents']);

  $field = field_widget_field($element, $form_state);
  $instance = field_widget_instance($element, $form_state);

  $context = array(
    'field' => $field,
    'instance' => $instance,
    'item' => $item,
  );

  backdrop_alter('date_combo_pre_validate', $element, $form_state, $context);

  $from_field = 'value';
  $to_field = 'value2';
  $tz_field = 'timezone';
  $offset_field = 'offset';
  $offset_field2 = 'offset2';

  $errors = array();

  // Check for empty 'Start date', which could either be an empty
  // value or an array of empty values, depending on the widget.
  $empty = TRUE;
  if (!empty($item[$from_field])) {
    if (!is_array($item[$from_field])) {
      $empty = FALSE;
    }
    else {
      foreach ($item[$from_field] as $key => $value) {
        if (!empty($value)) {
          $empty = FALSE;
          break;
        }
      }
    }
  }

  // An 'End' date without a 'Start' date is a validation error.
  if ($empty && !empty($item[$to_field])) {
    if (!is_array($item[$to_field])) {
      $errors[] = t("A start date is required if an end date is supplied.", array(
        '%field' => $instance['label'],
      ));
      $empty = FALSE;
    }
    else {
      foreach ($item[$to_field] as $key => $value) {
        if (!empty($value)) {
          $errors[] = t("A start date is required if an end date is supplied for field %field #@delta.", array(
            '@delta' => $field['cardinality'] ? intval($delta + 1) : '',
            '%field' => $instance['label'],
          ));
          $empty = FALSE;
          break;
        }
      }
    }
  }

  // If the user chose the option to not show the end date, just swap in the
  // start date as that value so the start and end dates are the same.
  if ($field['settings']['todate'] == 'optional' && empty($item['show_todate'])) {
    $item[$to_field] = $item[$from_field];
    $posted[$to_field] = $posted[$from_field];
  }

  if ($empty) {
    date_element_empty($element, $form_state);
    if (!$element['#required']) {
      return;
    }
  }
  else {
    $timezone = !empty($item[$tz_field]) ? $item[$tz_field] : $element['#date_timezone'];
    $timezone_db = date_get_timezone_db($field['settings']['tz_handling']);
    $element[$from_field]['#date_timezone'] = $timezone;
    $from_date = date_input_date($field, $instance, $element[$from_field], $posted[$from_field]);

    if (!empty($field['settings']['todate'])) {
      $element[$to_field]['#date_timezone'] = $timezone;
      $to_date = date_input_date($field, $instance, $element[$to_field], $posted[$to_field]);
    }
    else {
      $to_date = $from_date;
    }

    if (!$instance['required'] && (!date_is_date($from_date) || !date_is_date($to_date))) {
      $errors[] = t('The dates are invalid.');
    }
    elseif (!empty($field['settings']['todate']) && $from_date > $to_date) {
      form_set_value($element[$to_field], $to_date, $form_state);
      $errors[] = t('The end date must be greater than the start date.');
    }

    if (empty($errors) && !empty($from_date)) {
      // Convert input dates back to their UTC values and re-format to ISO
      // or UNIX instead of the DATETIME format used in element processing.
      $item[$tz_field] = $timezone;

      // Update the context for changes in the $item, and allow other modules
      // to alter the computed local dates.
      $context['item'] = $item;
      // We can only pass two additional values to backdrop_alter, so $element
      // needs to be included in $context.
      $context['element'] = $element;
      backdrop_alter('date_combo_validate_date_start', $from_date, $form_state, $context);
      backdrop_alter('date_combo_validate_date_end', $to_date, $form_state, $context);

      $item[$offset_field] = date_offset_get($from_date);

      $test_from = date_format($from_date, 'r');
      $test_to = date_format($to_date, 'r');

      $item[$offset_field2] = date_offset_get($to_date);
      date_timezone_set($from_date, timezone_open($timezone_db));
      date_timezone_set($to_date, timezone_open($timezone_db));
      $item[$from_field] = date_format($from_date, date_type_format($field['type']));
      $item[$to_field] = date_format($to_date, date_type_format($field['type']));

      // If the db timezone is not the same as the display timezone
      // and we are using a date with time granularity,
      // test a roundtrip back to the original timezone to catch
      // invalid dates, like 2AM on the day that spring daylight savings
      // time begins in the US.
      $granularity = date_format_order($element[$from_field]['#date_format']);
      if ($timezone != $timezone_db && date_has_time($granularity)) {
        date_timezone_set($from_date, timezone_open($timezone));
        date_timezone_set($to_date, timezone_open($timezone));

        if ($test_from != date_format($from_date, 'r')) {
          $errors[] = t('The start date is invalid.');
        }
        if ($test_to != date_format($to_date, 'r')) {
          $errors[] = t('The end date is invalid.');
        }
      }
      if (empty($errors)) {
        form_set_value($element, $item, $form_state);
      }
    }
  }
  // Don't show further errors if errors are already flagged
  // because otherwise we'll show errors on the nested elements
  // more than once.
  if (!empty($errors)) {
    if (count($errors) === 1) {
      $error_list = ' ' . reset($errors);
    }
    else {
      $error_list = theme('item_list', array('items' => $errors));
    }
    if ($field['cardinality'] != 1) {
      form_error($element, t('There are errors in %field_name value #@delta:', array(
        '%field_name' => $instance['label'],
        '@delta' => $delta + 1,
      )) . $error_list);
    }
    else {
      form_error($element, t('There are errors in %field_name:', array(
        '%field_name' => $instance['label'],
      )) . $error_list);
    }
  }
}