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<?php
/**
 * Copyright (c) 2016, Mollie B.V.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 *
 * @license     Berkeley Software Distribution License (BSD-License 2) http://www.opensource.org/licenses/bsd-license.php
 * @author      Mollie B.V. <info@mollie.com>
 * @copyright   Mollie B.V.
 * @link        https://www.mollie.com
 */
namespace Mollie\Laravel;

use Illuminate\Support\Arr;
use Laravel\Socialite\Two\AbstractProvider;
use Laravel\Socialite\Two\ProviderInterface;
use Laravel\Socialite\Two\User;

/**
 * Class MollieConnectProvider.
 */
class MollieConnectProvider extends AbstractProvider implements ProviderInterface
{
    /**
     * The base url to the Mollie API.
     *
     * @const string
     */
    const MOLLIE_API_URL = 'https://api.mollie.com';

    /**
     * The base url to the Mollie web application.
     *
     * @const string
     */
    const MOLLIE_WEB_URL = 'https://www.mollie.com';

    /**
     * The scopes being requested.
     *
     * @var array
     */
    protected $scopes = ['organizations.read'];

    /**
     * The separating character for the requested scopes.
     *
     * @var string
     */
    protected $scopeSeparator = ' ';

    /**
     * Get the authentication URL for the provider.
     *
     * @param string $state
     *
     * @return string
     */
    protected function getAuthUrl($state)
    {
        return $this->buildAuthUrlFromBase(static::MOLLIE_WEB_URL.'/oauth2/authorize', $state);
    }

    /**
     * Get the token URL for the provider.
     *
     * @return string
     */
    protected function getTokenUrl()
    {
        return static::MOLLIE_API_URL.'/oauth2/tokens';
    }

    /**
     * Get the access token for the given code.
     *
     * @param string $code
     *
     * @return string
     */
    public function getAccessToken($code)
    {
        $response = $this->getHttpClient()->post($this->getTokenUrl(), [
            'headers' => ['Authorization' => 'Basic '.base64_encode($this->clientId.':'.$this->clientSecret)],
            'form_params' => $this->getTokenFields($code),
        ]);

        return $this->parseAccessToken($response->getBody());
    }

    /**
     * Get the access token with a refresh token.
     *
     * @param string $refresh_token
     *
     * @return array
     */
    public function getRefreshTokenResponse($refresh_token)
    {
        $response = $this->getHttpClient()->post($this->getTokenUrl(), [
            'headers' => ['Accept' => 'application/json'],
            'form_params' => $this->getRefreshTokenFields($refresh_token),
        ]);

        return json_decode($response->getBody(), true);
    }

    /**
     * Get the refresh tokenfields with a refresh token.
     *
     * @param string $refresh_token
     *
     * @return array
     */
    protected function getRefreshTokenFields($refresh_token)
    {
        return [
            'client_id' => $this->clientId,
            'client_secret' => $this->clientSecret,
            'grant_type' => 'refresh_token',
            'refresh_token' => $refresh_token,
        ];
    }

    /**
     * Get the POST fields for the token request.
     *
     * @param string $code
     *
     * @return array
     */
    public function getTokenFields($code)
    {
        return Arr::add(parent::getTokenFields($code), 'grant_type', 'authorization_code');
    }

    /**
     * Get the raw user for the given access token.
     *
     * @param string $token
     *
     * @return array
     */
    protected function getUserByToken($token)
    {
        $response = $this->getHttpClient()->get(static::MOLLIE_API_URL.'/v2/organizations/me', [
            'headers' => ['Authorization' => 'Bearer '.$token],
        ]);

        return json_decode($response->getBody(), true);
    }

    /**
     * Map the raw user array to a Socialite User instance.
     *
     * @param array $user
     *
     * @return \Laravel\Socialite\AbstractUser
     */
    protected function mapUserToObject(array $user)
    {
        return (new User())->setRaw($user)->map([
            'id' => $user['id'],
            'nickname' => $user['name'],
            'name' => $user['name'],
            'email' => $user['email'],
            'avatar' => null,
        ]);
    }
}