Enumerator

BasicEnum.php

<?php
/**
 * SageOne Library
 *
 * @category Library
 * @package  SageOne
 * @author   Brian Cline https://stackoverflow.com/a/254543/536434 / Brian Maiyo kiproping@github.com
 * @license  MIT <https://github.com/darrynten/sage-one-php/blob/master/LICENSE>
 * @link     https://github.com/darrynten/sage-one-php
 */

namespace DarrynTen\SageOne;

abstract class BasicEnum {
    private static $constCacheArray = NULL;

    private static function getConstants() {
        if (self::$constCacheArray == NULL) {
            self::$constCacheArray = [];
        }
        $calledClass = get_called_class();
        if (!array_key_exists($calledClass, self::$constCacheArray)) {
            $reflect = new ReflectionClass($calledClass);
            self::$constCacheArray[$calledClass] = $reflect->getConstants();
        }
        return self::$constCacheArray[$calledClass];
    }

    public static function isValidName($name, $strict = false) {
        $constants = self::getConstants();
        if ($strict) {
            return array_key_exists($name, $constants);
        }
        $keys = array_map('strtolower', array_keys($constants));
        return in_array(strtolower($name), $keys);
    }

    public static function isValidValue($value, $strict = true) {
        $values = array_values(self::getConstants());
        return in_array($value, $values, $strict);
    }

    public static function toString($value){
        $constants = self::getConstants();
        $flippedConstants = array_flip($constants);
        return $flippedConstants[$value];
    }
}