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<?php
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namespace Laravel\SerializableClosure\Serializers;
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use Laravel\SerializableClosure\Contracts\Serializable;
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use Laravel\SerializableClosure\Exceptions\InvalidSignatureException;
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use Laravel\SerializableClosure\Exceptions\MissingSecretKeyException;
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class Signed implements Serializable
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{
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    /**
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     * The signer that will sign and verify the closure's signature.
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     *
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     * @var \Laravel\SerializableClosure\Contracts\Signer|null
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     */
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    public static $signer;
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    /**
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     * The closure to be serialized/unserialized.
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     *
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     * @var \Closure
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     */
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    protected $closure;
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    /**
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     * Creates a new serializable closure instance.
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     *
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     * @param  \Closure  $closure
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     * @return void
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     */
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    public function __construct($closure)
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    {
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        $this->closure = $closure;
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    }
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    /**
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     * Resolve the closure with the given arguments.
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     *
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     * @return mixed
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     */
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    public function __invoke()
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    {
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        return call_user_func_array($this->closure, func_get_args());
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    }
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    /**
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     * Gets the closure.
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     *
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     * @return \Closure
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     */
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    public function getClosure()
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    {
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        return $this->closure;
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    }
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    /**
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     * Get the serializable representation of the closure.
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     *
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     * @return array
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     */
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    public function __serialize()
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    {
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        if (! static::$signer) {
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            throw new MissingSecretKeyException();
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        }
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        return static::$signer->sign(
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            serialize(new Native($this->closure))
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        );
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    }
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    /**
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     * Restore the closure after serialization.
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     *
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     * @param  array  $signature
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     * @return void
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     *
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     * @throws \Laravel\SerializableClosure\Exceptions\InvalidSignatureException
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     */
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    public function __unserialize($signature)
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    {
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        if (static::$signer && ! static::$signer->verify($signature)) {
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            throw new InvalidSignatureException();
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        }
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        /** @var \Laravel\SerializableClosure\Contracts\Serializable $serializable */
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        $serializable = unserialize($signature['serializable']);
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        $this->closure = $serializable->getClosure();
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    }
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}