function date_is_all_day

Determine if a start/end date combination qualify as 'All day'.

Parameters

string $string1: A string date in datetime format for the 'start' date.

string $string2: A string date in datetime format for the 'end' date.

string $granularity: (optional) The granularity of the date. Defaults to 'second'.

int $increment: (optional) The increment of the date. Defaults to 1.

Return value

bool: TRUE if the date is all day, FALSE otherwise.

File

core/includes/date.inc, line 1530

Date API functions.

Code

function date_is_all_day($string1, $string2, $granularity = 'second', $increment = 1) {
  if (empty($string1) || empty($string2)) {
    return FALSE;
  }
  elseif (!in_array($granularity, array('hour', 'minute', 'second'))) {
    return FALSE;
  }

  preg_match('/([0-9]{4}-[0-9]{2}-[0-9]{2}) (([0-9]{2}):([0-9]{2}):([0-9]{2}))/', $string1, $matches);
  $count = count($matches);
  $date1 = $count > 1 ? $matches[1] : '';
  $time1 = $count > 2 ? $matches[2] : '';
  $hour1 = $count > 3 ? intval($matches[3]) : 0;
  $min1 = $count > 4 ? intval($matches[4]) : 0;
  $sec1 = $count > 5 ? intval($matches[5]) : 0;
  preg_match('/([0-9]{4}-[0-9]{2}-[0-9]{2}) (([0-9]{2}):([0-9]{2}):([0-9]{2}))/', $string2, $matches);
  $count = count($matches);
  $date2 = $count > 1 ? $matches[1] : '';
  $time2 = $count > 2 ? $matches[2] : '';
  $hour2 = $count > 3 ? intval($matches[3]) : 0;
  $min2 = $count > 4 ? intval($matches[4]) : 0;
  $sec2 = $count > 5 ? intval($matches[5]) : 0;
  if (empty($date1) || empty($date2)) {
    return FALSE;
  }
  if (empty($time1) || empty($time2)) {
    return FALSE;
  }

  $tmp = date_seconds('s', TRUE, $increment);
  $max_seconds = intval(array_pop($tmp));
  $tmp = date_minutes('i', TRUE, $increment);
  $max_minutes = intval(array_pop($tmp));

  // See if minutes and seconds are the maximum allowed for an increment or the
  // maximum possible (59), or 0.
  switch ($granularity) {
    case 'second':
      $min_match = $time1 == '00:00:00'
        || ($hour1 == 0 && $min1 == 0 && $sec1 == 0);
      $max_match = $time2 == '00:00:00'
        || ($hour2 == 23 && in_array($min2, array($max_minutes, 59)) && in_array($sec2, array($max_seconds, 59)))
        || ($hour1 == 0 && $hour2 == 0 && $min1 == 0 && $min2 == 0 && $sec1 == 0 && $sec2 == 0);
      break;

    case 'minute':
      $min_match = $time1 == '00:00:00'
        || ($hour1 == 0 && $min1 == 0);
      $max_match = $time2 == '00:00:00'
        || ($hour2 == 23 && in_array($min2, array($max_minutes, 59)))
        || ($hour1 == 0 && $hour2 == 0 && $min1 == 0 && $min2 == 0);
      break;

    case 'hour':
      $min_match = $time1 == '00:00:00'
        || ($hour1 == 0);
      $max_match = $time2 == '00:00:00'
        || ($hour2 == 23)
        || ($hour1 == 0 && $hour2 == 0);
      break;

    default:
      $min_match = TRUE;
      $max_match = FALSE;
  }

  if ($min_match && $max_match) {
    return TRUE;
  }

  return FALSE;
}