NumericRangeArgumentValidator.php in Views Contextual Range Filter 8

Namespace

Drupal\contextual_range_filter\Plugin\views\argument_validator

File

src/Plugin/views/argument_validator/NumericRangeArgumentValidator.php

<?php

namespace Drupal\contextual_range_filter\Plugin\views\argument_validator;

use Drupal\views\Plugin\views\argument_validator\NumericArgumentValidator;

/**
 * Validate whether an argument is a numeric range.
 *
 * A valid range is either a valid single number or a range of the form:
 *  xfrom--xto  or  xfrom--  or  --xto
 * Instead of the double-hyphen a colon may be used.
 *
 * @Plugin(
 *   id = "numeric_range",
 *   title = @Translation("Numeric Range")
 * )
 */
class NumericRangeArgumentValidator extends NumericArgumentValidator {

  /**
   * Validate our argument.
   */
  public function validateArgument($argument) {

    // Plus sign may arrive as a space, so cover both.
    $ranges = preg_split('/[+ ]/', $argument);
    foreach ($ranges as $range) {
      $minmax = explode(CONTEXTUAL_RANGE_FILTER_SEPARATOR1, $range);
      if (count($minmax) < 2) {
        $minmax = explode(CONTEXTUAL_RANGE_FILTER_SEPARATOR2, $range);
      }
      if (count($minmax) < 2) {

        // Not a range but single value. Delegate to parent class.
        if (!parent::validateArgument($argument)) {
          return FALSE;
        }
      }
      elseif (!(parent::validateArgument($minmax[0]) && parent::validateArgument($minmax[1]) && $minmax[0] <= $minmax[1] || empty($minmax[0]) && parent::validateArgument($minmax[1]) || empty($minmax[1]) && parent::validateArgument($minmax[0]))) {
        return FALSE;
      }
    }
    return TRUE;
  }

}

Classes

Name	Description
NumericRangeArgumentValidator	Validate whether an argument is a numeric range.