BaseEnum.php

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<?php
namespace Ajax\common;

abstract class BaseEnum {

    private static $constCacheArray = NULL;

    private static $picked = [];

    public 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 getConstantValues($postFix = "", $prefixBefore = false) {
        if ($postFix == "")
            return \array_values(self::getConstants());
        else {
            if ($prefixBefore === false) {
                return \array_map(function ($elem) use ($postFix) {
                    return $elem . " " . $postFix;
                }, \array_values(self::getConstants()));
            } else {
                return \array_map(function ($elem) use ($postFix) {
                    return $postFix . " " . $elem;
                }, \array_values(self::getConstants()));
            }
        }
    }

    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) {
        $values = \array_values(self::getConstants());
        return \in_array($value, $values, true);
    }

    public static function getRandomValue(bool $unique = false) {
        $values = self::getConstantValues();
        $count = \count($values);
        $calledClass = \get_called_class();
        if ($unique && $count > count(self::$picked[$calledClass] ?? [])) {
            do {
                $newVal = $values[\rand(0, $count - 1)];
            } while (isset(self::$picked[$calledClass][$newVal]));
            self::$picked[$calledClass][$newVal] = true;
            return $newVal;
        }
        return $values[\rand(0, $count - 1)];
    }
}