[5.x] Add Slack OpenID provider

src/SocialiteManager.php

@@ -14,6 +14,7 @@
 use Laravel\Socialite\Two\GoogleProvider;
 use Laravel\Socialite\Two\LinkedInOpenIdProvider;
 use Laravel\Socialite\Two\LinkedInProvider;
+use Laravel\Socialite\Two\SlackOpenIdProvider;
 use Laravel\Socialite\Two\SlackProvider;
 use Laravel\Socialite\Two\TwitterProvider as TwitterOAuth2Provider;
 use League\OAuth1\Client\Server\Twitter as TwitterServer;
@@ -184,6 +185,20 @@ protected function createSlackDriver()
         );
     }
 
+    /**
+     * Create an instance of the specified driver.
+     *
+     * @return \Laravel\Socialite\Two\AbstractProvider
+     */
+    protected function createSlackOpenidDriver()
+    {
+        $config = $this->config->get('services.slack-openid');
+
+        return $this->buildProvider(
+            SlackOpenIdProvider::class, $config
+        );
+    }
+
     /**
      * Build an OAuth 2 provider instance.
      *

src/Two/SlackOpenIdProvider.php

@@ -0,0 +1,44 @@
+<?php
+
+namespace Laravel\Socialite\Two;
+
+use GuzzleHttp\RequestOptions;
+use Illuminate\Support\Arr;
+
+class SlackOpenIdProvider extends AbstractProvider implements ProviderInterface
+{
+    protected $scopes = ['openid', 'email', 'profile'];
+
+    protected $scopeSeparator = ' ';
+
+    protected function getAuthUrl($state)
+    {
+        return $this->buildAuthUrlFromBase('https://slack.com/openid/connect/authorize', $state);
+    }
+
+    protected function getTokenUrl()
+    {
+        return 'https://slack.com/api/openid.connect.token';
+    }
+
+    protected function getUserByToken($token)
+    {
+        $response = $this->getHttpClient()->get('https://slack.com/api/openid.connect.userInfo', [
+            RequestOptions::HEADERS => ['Authorization' => 'Bearer '.$token],
+        ]);
+
+        return json_decode($response->getBody(), true);
+    }
+
+    protected function mapUserToObject(array $user)
+    {
+        return (new User)->setRaw($user)->map([
+            'id' => Arr::get($user, 'sub'),
+            'nickname' => null,
+            'name' => Arr::get($user, 'name'),
+            'email' => Arr::get($user, 'email'),
+            'avatar' => Arr::get($user, 'picture'),
+            'organization_id' => Arr::get($user, 'https://slack.com/team_id'),
+        ]);
+    }
+}