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<?php
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namespace Laravel\SerializableClosure;
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use Closure;
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use Laravel\SerializableClosure\Exceptions\InvalidSignatureException;
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use Laravel\SerializableClosure\Serializers\Signed;
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use Laravel\SerializableClosure\Signers\Hmac;
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class SerializableClosure
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{
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    /**
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     * The closure's serializable.
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     *
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     * @var \Laravel\SerializableClosure\Contracts\Serializable
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     */
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    protected $serializable;
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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 $closure)
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    {
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        $this->serializable = Serializers\Signed::$signer
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            ? new Serializers\Signed($closure)
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            : new Serializers\Native($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->serializable, 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->serializable->getClosure();
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    }
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    /**
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     * Create a new unsigned serializable closure instance.
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     *
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     * @param  Closure  $closure
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     * @return \Laravel\SerializableClosure\UnsignedSerializableClosure
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     */
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    public static function unsigned(Closure $closure)
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    {
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        return new UnsignedSerializableClosure($closure);
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    }
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    /**
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     * Sets the serializable closure secret key.
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     *
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     * @param  string|null  $secret
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     * @return void
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     */
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    public static function setSecretKey($secret)
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    {
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        Serializers\Signed::$signer = $secret
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            ? new Hmac($secret)
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            : null;
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    }
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    /**
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     * Sets the serializable closure secret key.
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     *
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     * @param  \Closure|null  $transformer
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     * @return void
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     */
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    public static function transformUseVariablesUsing($transformer)
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    {
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        Serializers\Native::$transformUseVariables = $transformer;
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    }
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    /**
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     * Sets the serializable closure secret key.
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     *
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     * @param  \Closure|null  $resolver
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     * @return void
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     */
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    public static function resolveUseVariablesUsing($resolver)
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    {
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        Serializers\Native::$resolveUseVariables = $resolver;
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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{serializable: \Laravel\SerializableClosure\Serializers\Signed|\Laravel\SerializableClosure\Contracts\Serializable}
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     */
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    public function __serialize()
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    {
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        return [
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            'serializable' => $this->serializable,
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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{serializable: \Laravel\SerializableClosure\Serializers\Signed|\Laravel\SerializableClosure\Contracts\Serializable}  $data
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     * @return void
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     *
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     * @throws \Laravel\SerializableClosure\Exceptions\InvalidSignatureException
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     */
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    public function __unserialize($data)
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    {
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        if (Signed::$signer && ! $data['serializable'] instanceof Signed) {
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            throw new InvalidSignatureException();
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        }
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        $this->serializable = $data['serializable'];
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    }
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}