enum

gistfile1.php

<?php

namespace Rj\CoreBundle\Enum;

abstract class Enum
{
    /**
     *
     * @var array
     */
    protected static $titles = array();

    /**
     *
     * @var Closure
     */
    protected static $translator;

    public static function all()
    {
        static::checkIntegrity();

        return static::getRC()->getConstants();
    }

    /**
     *
     * @return array
     */
    public static function values()
    {
        static::checkIntegrity();

        return array_values(static::all());
    }

    public static function keys()
    {
        static::checkIntegrity();

        return array_keys(static::all());
    }

    /**
     *
     * @return array
     */
    public static function titles()
    {
        static::checkIntegrity();

        $titles = static::$titles;

        return array_map(static::$titles, self::getTranslator());
    }

    /**
     *
     * @param string|int $value
     *
     * @return bool
     */
    public static function isValid($value)
    {
        static::checkIntegrity();

        return \in_array($value, static::all(), false);
    }

    /**
     *
     * @param mixed $value
     *
     * @throws Exception if the value does not valid for the enum type
     *
     * @return void
     */
    public static function throwsInvalid($value)
    {
        if (!static::isValid($value)) {
            throw new \Exception('The enum type `' . get_called_class() . '` does not contains value `' . var_export($value, true) . '`. Possible values are `' . static::implode('`, `') . '`');
        }
    }

    /**
     *
     * @param string $separator
     *
     * @return string
     */
    public static function implode($separator = ', ')
    {
        return implode($separator, static::values());
    }

    public static function setTranslator(\Closure $tranlator)
    {
        self::$translator = $translator;
    }

    public static function getTranslator()
    {
        if (false == self::$translator) {
            self::$translator = function($title) {
                return $title;
            };
        }

        return self::$translator;
    }

    /**
     *
     * @return \ReflectionClass
     */
    protected static function getRC() {
        return new \ReflectionClass(get_called_class());
    }

    protected static function checkIntegrity()
    {
        static $checked = false;
        if (true == $checked) return;
        
        $diff = \array_diff_key(static::getRC()->getConstants(), static::$titles);
        if (false == empty($diff)) {
            throw new \LengthException('The enum `'.\get_called_class().'` is not configured correctly. There is a diff between titles and                 defenitino `'.\json_encode($diff).'`');
        }

        $checked = true;
    }
}