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<?php

namespace OAuth\OAuth2\Service;

use OAuth\OAuth2\Token\StdOAuth2Token;
use OAuth\Common\Http\Exception\TokenResponseException;
use OAuth\Common\Http\Uri\Uri;
use OAuth\Common\Consumer\CredentialsInterface;
use OAuth\Common\Http\Client\ClientInterface;
use OAuth\Common\Storage\TokenStorageInterface;
use OAuth\Common\Http\Uri\UriInterface;

/**
 * Linkedin service.
 *
 * @author Antoine Corcy <contact@sbin.dk>
 * @link http://developer.linkedin.com/documents/authentication
 */
class Linkedin extends AbstractService
{
    /**
     * Defined scopes
     * @link http://developer.linkedin.com/documents/authentication#granting
     */
    const SCOPE_R_BASICPROFILE      = 'r_basicprofile';
    const SCOPE_R_FULLPROFILE       = 'r_fullprofile';
    const SCOPE_R_EMAILADDRESS      = 'r_emailaddress';
    const SCOPE_R_NETWORK           = 'r_network';
    const SCOPE_R_CONTACTINFO       = 'r_contactinfo';
    const SCOPE_RW_NUS              = 'rw_nus';
    const SCOPE_RW_COMPANY_ADMIN    = 'rw_company_admin';
    const SCOPE_RW_GROUPS           = 'rw_groups';
    const SCOPE_W_MESSAGES          = 'w_messages';
    const SCOPE_W_SHARE             = 'w_share';

    public function __construct(
        CredentialsInterface $credentials,
        ClientInterface $httpClient,
        TokenStorageInterface $storage,
        $scopes = array(),
        UriInterface $baseApiUri = null
    ) {
        parent::__construct($credentials, $httpClient, $storage, $scopes, $baseApiUri, true);

        if (null === $baseApiUri) {
            $this->baseApiUri = new Uri('https://api.linkedin.com/v1/');
        }
    }

    /**
     * {@inheritdoc}
     */
    public function getAuthorizationEndpoint()
    {
        return new Uri('https://www.linkedin.com/uas/oauth2/authorization');
    }

    /**
     * {@inheritdoc}
     */
    public function getAccessTokenEndpoint()
    {
        return new Uri('https://www.linkedin.com/uas/oauth2/accessToken');
    }

    /**
     * {@inheritdoc}
     */
    protected function getAuthorizationMethod()
    {
        return static::AUTHORIZATION_METHOD_QUERY_STRING_V2;
    }

    /**
     * {@inheritdoc}
     */
    protected function parseAccessTokenResponse($responseBody)
    {
        $data = json_decode($responseBody, true);

        if (null === $data || !is_array($data)) {
            throw new TokenResponseException('Unable to parse response.');
        } elseif (isset($data['error'])) {
            throw new TokenResponseException('Error in retrieving token: "' . $data['error'] . '"');
        }

        $token = new StdOAuth2Token();
        $token->setAccessToken($data['access_token']);
        $token->setLifeTime($data['expires_in']);

        if (isset($data['refresh_token'])) {
            $token->setRefreshToken($data['refresh_token']);
            unset($data['refresh_token']);
        }

        unset($data['access_token']);
        unset($data['expires_in']);

        $token->setExtraParams($data);

        return $token;
    }
}