Provider.php

<?php

namespace SocialiteProviders\Spotify;

use Illuminate\Support\Arr;
use SocialiteProviders\Manager\OAuth2\AbstractProvider;
use SocialiteProviders\Manager\OAuth2\User;

class Provider extends AbstractProvider
{
    /**
     * Unique Provider Identifier.
     */
    const IDENTIFIER = 'SPOTIFY';

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

    /**
     * {@inheritdoc}
     */
    protected function getAuthUrl($state)
    {
        return $this->buildAuthUrlFromBase(
            'https://accounts.spotify.com/authorize', $state
        );
    }

    /**
     * {@inheritdoc}
     */
    protected function getTokenUrl()
    {
        return 'https://accounts.spotify.com/api/token';
    }

    /**
     * {@inheritdoc}
     */
    protected function getUserByToken($token)
    {
        $response = $this->getHttpClient()->get(
            'https://api.spotify.com/v1/me', [
            'headers' => [
                'Accept'        => 'application/json',
                'Authorization' => 'Bearer '.$token,
            ],
        ]);

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

    /**
     * {@inheritdoc}
     */
    protected function mapUserToObject(array $user)
    {
        return (new User())->setRaw($user)->map([
            'id'         => $user['id'],
            'nickname'   => null,
            'name'       => $user['display_name'],
            'email'      => isset($user['email']) ? $user['email'] : null,
            'avatar'     => Arr::get($user, 'images.0.url'),
            'profileUrl' => isset($user['href']) ? $user['href'] : null,
        ]);
    }

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