protected static function PersianDateList::datetimeRangeYears in Persian Date for Drupal 8 8.4

Specifies the start and end year to use as a date range.

Handles a string like -3:+3 or 2001:2010 to describe a dynamic range of minimum and maximum years to use in a date selector.

Centers the range around the current year, if any, but expands 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' or '2000:2010' or '2000:+3'.

object $date: (optional) A date object to test as a default value. Defaults to NULL.

Return value

array A numerically indexed array, containing the minimum and maximum year described by this pattern.

Overrides DateElementBase::datetimeRangeYears

1 call to PersianDateList::datetimeRangeYears()

PersianDateList::processDatelist in src/Element/PersianDateList.php

Expands a date element into an array of individual elements.

File

src/Element/PersianDateList.php, line 220

Class

PersianDateList

Class PersianDateList

Namespace

Drupal\persian_date\Element

Code

protected static function datetimeRangeYears($string, $date = NULL) {
  $datetime = new PersianDrupalDateTime();
  $this_year = $datetime
    ->format('Y');
  list($min_year, $max_year) = explode(':', $string);
  $min_year -= 621;
  $max_year -= 621;

  // 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, $min_year, $matches)) {
    if (preg_match($plus_pattern, $min_year, $matches)) {
      $min_year = $this_year + $matches[0];
    }
    else {
      $min_year = $this_year;
    }
  }
  if (!preg_match($year_pattern, $max_year, $matches)) {
    if (preg_match($plus_pattern, $max_year, $matches)) {
      $max_year = $this_year + $matches[0];
    }
    else {
      $max_year = $this_year;
    }
  }

  // We expect the $min year to be less than the $max year. Some custom values
  // for -99:+99 might not obey that.
  if ($min_year > $max_year) {
    $temp = $max_year;
    $max_year = $min_year;
    $min_year = $temp;
  }

  // If there is a current value, stretch the range to include it.
  $value_year = $date instanceof DrupalDateTime ? $date
    ->format('Y') : '';
  if (!empty($value_year)) {
    $min_year = min($value_year, $min_year);
    $max_year = max($value_year, $max_year);
  }
  return [
    $min_year,
    $max_year,
  ];
}