function date_range_years in Date 7.2

Same name and namespace in other branches

1. 6.2 date_api.module \date_range_years()
2. 7.3 date_api/date_api.module \date_range_years()
3. 7 date_api/date_api.module \date_range_years()

Splits a string like -3:+3 or 2001:2010 into an array of start and end years.

Center the range around the current year, if any, but expand it far enough so it will pick up the year value in the field in case the value in the field is outside the initial range.

Parameters

string $string: A min and max year string like '-3:+1'.

object $date: (optional) A date object. Defaults to NULL.

Return value

array A numerically indexed array, containing a start and end year.

4 calls to date_range_years()

date_parts_element in date_api/date_api_elements.inc

Creates form elements for one or more date parts.

date_popup_process_date_part in date_popup/date_popup.module

Process the date portion of the element.

date_views_argument_handler_simple::date_forbid in date_views/includes/date_views_argument_handler_simple.inc

Add a callback.

date_views_plugin_pager::date_forbid in date_views/includes/date_views_plugin_pager.inc

Determine if we have moved outside the valid date range for this argument.

File

date_api/date_api.module, line 2767

This module will make the date API available to other modules.

Code

function date_range_years($string, $date = NULL) {
  $this_year = date_format(date_now(), 'Y');
  list($start_year, $end_year) = explode(':', $string);

  // Valid patterns would be -5:+5, 0:+1, 2008:2010.
  $plus_pattern = '@[\\+\\-][0-9]{1,4}@';
  $year_pattern = '@^[0-9]{4}@';
  if (!preg_match($year_pattern, $start_year, $matches)) {
    if (preg_match($plus_pattern, $start_year, $matches)) {
      $start_year = $this_year + $matches[0];
    }
    else {
      $start_year = $this_year;
    }
  }
  if (!preg_match($year_pattern, $end_year, $matches)) {
    if (preg_match($plus_pattern, $end_year, $matches)) {
      $end_year = $this_year + $matches[0];
    }
    else {
      $end_year = $this_year;
    }
  }

  // If there is a current value, stretch the range to include it.
  $value_year = is_object($date) ? $date
    ->format('Y') : '';
  if (!empty($value_year)) {
    if ($start_year <= $end_year) {
      $start_year = min($value_year, $start_year);
      $end_year = max($value_year, $end_year);
    }
    else {
      $start_year = max($value_year, $start_year);
      $end_year = min($value_year, $end_year);
    }
  }
  return array(
    $start_year,
    $end_year,
  );
}