OAuthDataStore.php

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<?php

namespace IMSGlobal\LTI\ToolProvider;

use IMSGlobal\LTI\OAuth;

class OAuthDataStore extends OAuth\OAuthDataStore
{

    private $toolProvider = null;

    public function __construct($toolProvider)
    {

        $this->toolProvider = $toolProvider;

    }

    function lookup_consumer($consumerKey)
    {

        return new OAuth\OAuthConsumer($this->toolProvider->consumer->getKey(),
           $this->toolProvider->consumer->secret);

    }

    function lookup_token($consumer, $tokenType, $token)
    {

        return new OAuth\OAuthToken($consumer, '');

    }

    function lookup_nonce($consumer, $token, $value, $timestamp)
    {

        $nonce = new ConsumerNonce($this->toolProvider->consumer, $value);
        $ok = !$nonce->load();
        if ($ok) {
            $ok = $nonce->save();
        }
        if (!$ok) {
            $this->toolProvider->reason = 'Invalid nonce.';
        }

        return !$ok;

    }

    function new_request_token($consumer, $callback = null)
    {

        return null;

    }

    function new_access_token($token, $consumer, $verifier = null)
    {

        return null;

    }

}