ConsumerNonce.php

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<?php

namespace ceLTIc\LTI;

class ConsumerNonce
{

    const MAX_NONCE_AGE = 30;  // in minutes

    public static $maximumLength = 50;

    public $expires = null;

    private $consumer = null;

    private $value = null;

    public function __construct($consumer, $value = null)
    {
        $this->consumer = $consumer;
        $this->value = substr($value, -self::$maximumLength);
        $this->expires = time() + (self::MAX_NONCE_AGE * 60);
    }

    public function load()
    {
        return $this->consumer->getDataConnector()->loadConsumerNonce($this);
    }

    public function save()
    {
        return $this->consumer->getDataConnector()->saveConsumerNonce($this);
    }

    public function getConsumer()
    {
        return $this->consumer;
    }

    public function getValue()
    {
        return $this->value;
    }

}