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<?php
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namespace Aws\Token;
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use Aws\Token\TokenInterface;
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/**
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 * Basic implementation of the AWS Token interface that allows callers to
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 * pass in an AWS token in the constructor.
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 */
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class Token implements TokenInterface, \Serializable
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{
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    protected $token;
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    protected $expires;
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    /**
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     * Constructs a new basic token object, with the specified AWS
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     * token
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     *
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     * @param string $token   Security token to use
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     * @param int    $expires UNIX timestamp for when the token expires
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     */
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    public function __construct($token, $expires = null)
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    {
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        $this->token = $token;
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        $this->expires = $expires;
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    }
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    /**
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     * Sets the state of a token object
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     *
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     * @param array $state   array containing 'token' and 'expires'
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     */
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    public static function __set_state(array $state)
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    {
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        return new self(
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            $state['token'],
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            $state['expires']
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        );
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    }
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    /**
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     * @return string
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     */
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    public function getToken()
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    {
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        return $this->token;
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    }
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    /**
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     * @return int
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     */
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    public function getExpiration()
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    {
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        return $this->expires;
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    }
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    /**
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     * @return bool
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     */
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    public function isExpired()
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    {
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        return $this->expires !== null && time() >= $this->expires;
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    }
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    /**
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     * @return array
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     */
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    public function toArray()
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    {
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        return [
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            'token'   => $this->token,
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            'expires' => $this->expires
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        ];
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    }
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    /**
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     * @return string
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     */
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    public function serialize()
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    {
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        return json_encode($this->__serialize());
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    }
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    /**
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     * Sets the state of the object from serialized json data
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     */
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    public function unserialize($serialized)
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    {
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        $data = json_decode($serialized, true);
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        $this->__unserialize($data);
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    }
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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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        return $this->toArray();
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    }
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    /**
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     *  Sets the state of this object from an array
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     */
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    public function __unserialize($data)
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    {
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        $this->token = $data['token'];
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        $this->expires = $data['expires'];
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    }
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}