Provider.php

<?php

namespace App\OAuth;

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

class Provider extends AbstractProvider implements ProviderInterface
{
    /**
     * {@inheritdoc}
     */
    protected function getAuthUrl($state)
    {
        return $this->buildAuthUrlFromBase(config('services.provider.auth_url'), $state);
    }

    /**
     * {@inheritdoc}
     */
    protected function getTokenUrl()
    {
        return config('services.provider.token_url');
    }

    /**
     * {@inheritdoc}
     */
    protected function getUserByToken($token)
    {
        $userUrl = config('services.provider.user_url');

        $response = $this->getHttpClient()->get(
            $userUrl,
            $this->getRequestOptions($token)
        );

        $user = json_decode($response->getBody(), true);

        return $user;
    }

    /**
     * Get the email for the given access token.
     *
     * @param  string  $token
     * @return string|null
     */
    protected function getEmailByToken($token)
    {
        $emailsUrl = config('services.provider.email_url');

        try {
            $response = $this->getHttpClient()->get(
                $emailsUrl,
                $this->getRequestOptions($token)
            );
        } catch (Exception $e) {
            return;
        }

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

    /**
     * {@inheritdoc}
     */
    protected function mapUserToObject($user)
    {
        return (new User)->setRaw($user)->map(
            [
                'id' => $user['id'],
                'name' => Arr::get($user, 'name'),
                'nickname' => Arr::get($user, 'nickname'),
                'email' => Arr::get($user, 'email'),
            ]
        );
    }

    /**
     * Get the default options for an HTTP request.
     *
     * @return array
     */
    protected function getRequestOptions($token)
    {
        return [
            'headers' => [
                'Accept' => 'application/json',
                'Authorization' => 'Bearer ' . $token
            ],
        ];
    }

    /**
     * Get the POST fields for the token request.
     *
     * @param  string  $code
     * @return array
     */
    protected function getTokenFields($code)
    {
        return [
            'grant_type' => 'authorization_code',
            'client_id' => $this->clientId,
            'client_secret' => $this->clientSecret,
            'code' => $code,
            'redirect_uri' => $this->redirectUrl,
        ];
    }
}