Provider.php

<?php

namespace SocialiteProviders\WordPressSelfHosted;

use SocialiteProviders\Manager\OAuth2\User;
use SocialiteProviders\Manager\OAuth2\AbstractProvider;

use Laravel\Socialite\Two\ProviderInterface;
use GuzzleHttp\ClientInterface;

class Provider extends AbstractProvider implements ProviderInterface
{
    /**
     * Unique Provider Identifier.
     */
    const IDENTIFIER = 'WORDPRESS_SELF_HOSTED';

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

    /**
     * {@inheritdoc}
     */
    protected function getAuthUrl($state)
    {
        return $this->buildAuthUrlFromBase(config('services.wordpress_self_hosted.endpoints.authorize'), $state);
    }
    

    /**
     * {@inheritdoc}
     */
    protected function getTokenUrl()
    {
        return config('services.wordpress_self_hosted.endpoints.token');
    }
    
    /**
     * {@inheritdoc}
     */
    public function getAccessTokenResponse($code)
    {
        $postKey = (version_compare(ClientInterface::VERSION, '6') === 1) ? 'form_params' : 'body';

        $response = $this->getHttpClient()->post($this->getTokenUrl(), [
            'auth' => [$this->clientId, $this->clientSecret],
            'headers' => ['Accept' => 'application/json'],
            $postKey => $this->getTokenFields($code),
        ]);

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

    /**
     * {@inheritdoc}
     */
    protected function getUserByToken($token)
    {
        $response = $this->getHttpClient()->get(config('services.wordpress_self_hosted.endpoints.me').'?access_token='.$token);
        return json_decode($response->getBody()->getContents(), true);
    }

    /**
     * {@inheritdoc}
     */
    protected function mapUserToObject(array $user)
    {
        return (new User())->setRaw($user)->map(
            [
                'id' => $user['ID'],
                'nickname' => $user['display_name'],
                'name' => $user['display_name'],
                'email' => $user['user_email'],
                'avatar' => null,
            ]
        );
    }

    /**
     * {@inheritdoc}
     */
    protected function getTokenFields($code)
    {
        return array_merge(parent::getTokenFields($code), [
            'grant_type' => 'authorization_code',
        ]);
    }
}