first commit

common/Settings/Validators/FacebookLoginValidator.php

@@ -0,0 +1,84 @@
+<?php
+
+namespace Common\Settings\Validators;
+
+use Common\Auth\Oauth;
+use Common\Core\HttpClient;
+use Config;
+use GuzzleHttp\Exception\ClientException;
+use GuzzleHttp\Exception\ServerException;
+use Illuminate\Support\Arr;
+use Socialite;
+
+class FacebookLoginValidator implements SettingsValidator
+{
+    const KEYS = ['facebook_id', 'facebook_secret'];
+
+    /**
+     * @var Oauth
+     */
+    private $oauth;
+
+    /**
+     * @var HttpClient
+     */
+    private $httpClient;
+
+    public function __construct(Oauth $oauth)
+    {
+        $this->oauth = $oauth;
+        $this->httpClient = new HttpClient([
+            'exceptions' => true,
+        ]);
+    }
+
+    public function fails($values)
+    {
+        $this->setConfigDynamically($values);
+
+        try {
+            Socialite::driver('facebook')->getAccessTokenResponse('foo-bar');
+        } catch (ClientException $e) {
+            return $this->getErrorMessage($e);
+        } catch (ServerException $e) {
+            return $this->getDefaultError();
+        }
+    }
+
+    private function setConfigDynamically($settings)
+    {
+        if ($facebookId = Arr::get($settings, 'facebook_id')) {
+            Config::set('services.facebook.client_id', $facebookId);
+        }
+
+        if ($facebookSecret = Arr::get($settings, 'facebook_secret')) {
+            Config::set('services.facebook.client_secret', $facebookSecret);
+        }
+    }
+
+    /**
+     * @param ClientException $e
+     * @return array
+     */
+    private function getErrorMessage(ClientException $e)
+    {
+        $errResponse = json_decode($e->getResponse()->getBody()->getContents(), true);
+        $code = Arr::get($errResponse, 'error.code');
+
+        // there were no credentials related errors, we can assume validation was successful
+        if ($code === 100) {
+            return null;
+        }
+
+        if ($code === 191) {
+            return ['facebook_group' => 'Site url is not present in "Valid OAuth Redirect URIs" field on your facebook app.'];
+        }
+
+        return $this->getDefaultError();
+    }
+
+    private function getDefaultError()
+    {
+        return ['facebook_group' => 'These facebook credentials are not valid.'];
+    }
+}