From 001fcfabdd99540ed1d09d477762af3a485d0cd3 Mon Sep 17 00:00:00 2001
From: Dries Vints <dries.vints@gmail.com>
Date: Tue, 18 Dec 2018 12:21:53 +0100
Subject: [PATCH] Fix LinkedInProvider for new API

LinkedIn has suddenly stopped supported the previous endpoint we used to retrieve user profile information so we need to use the new API for authenticating users.

Fixes https://github.com/laravel/socialite/issues/309
---
 src/Two/LinkedInProvider.php | 79 ++++++++++++++++++++++--------------
 1 file changed, 48 insertions(+), 31 deletions(-)

diff --git a/src/Two/LinkedInProvider.php b/src/Two/LinkedInProvider.php
index f8ac6cd4..83231193 100644
--- a/src/Two/LinkedInProvider.php
+++ b/src/Two/LinkedInProvider.php
@@ -11,7 +11,7 @@ class LinkedInProvider extends AbstractProvider implements ProviderInterface
      *
      * @var array
      */
-    protected $scopes = ['r_basicprofile', 'r_emailaddress'];
+    protected $scopes = ['r_liteprofile', 'r_emailaddress'];
 
     /**
      * The separating character for the requested scopes.
@@ -20,17 +20,6 @@ class LinkedInProvider extends AbstractProvider implements ProviderInterface
      */
     protected $scopeSeparator = ' ';
 
-    /**
-     * The fields that are included in the profile.
-     *
-     * @var array
-     */
-    protected $fields = [
-        'id', 'first-name', 'last-name', 'formatted-name',
-        'email-address', 'headline', 'location', 'industry',
-        'public-profile-url', 'picture-url', 'picture-urls::(original)',
-    ];
-
     /**
      * {@inheritdoc}
      */
@@ -63,14 +52,26 @@ protected function getTokenFields($code)
      */
     protected function getUserByToken($token)
     {
-        $fields = implode(',', $this->fields);
+        $basicProfile = $this->getBasicProfile($token);
+        $emailAddress = $this->getEmailAddress($token);
 
-        $url = 'https://api.linkedin.com/v1/people/~:('.$fields.')';
+        return array_merge($basicProfile, $emailAddress);
+    }
+
+    /**
+     * Get the basic profile fields for the user.
+     *
+     * @param  string  $token
+     * @return array
+     */
+    protected function getBasicProfile($token)
+    {
+        $url = 'https://api.linkedin.com/v2/me?projection=(id,firstName,lastName,profilePicture(displayImage~:playableStreams))';
 
         $response = $this->getHttpClient()->get($url, [
             'headers' => [
-                'x-li-format' => 'json',
                 'Authorization' => 'Bearer '.$token,
+                'X-RestLi-Protocol-Version' => '2.0.0',
             ],
         ]);
 
@@ -78,30 +79,46 @@ protected function getUserByToken($token)
     }
 
     /**
-     * {@inheritdoc}
+     * Get the email address for the user.
+     *
+     * @param  string  $token
+     * @return array
      */
-    protected function mapUserToObject(array $user)
+    protected function getEmailAddress($token)
     {
-        return (new User)->setRaw($user)->map([
-            'id' => $user['id'],
-            'nickname' => null,
-            'name' => Arr::get($user, 'formattedName'),
-            'email' => Arr::get($user, 'emailAddress'),
-            'avatar' => Arr::get($user, 'pictureUrl'),
-            'avatar_original' => Arr::get($user, 'pictureUrls.values.0'),
+        $url = 'https://api.linkedin.com/v2/emailAddress?q=members&projection=(elements*(handle~))';
+
+        $response = $this->getHttpClient()->get($url, [
+            'headers' => [
+                'Authorization' => 'Bearer '.$token,
+                'X-RestLi-Protocol-Version' => '2.0.0',
+            ],
         ]);
+
+        return json_decode($response->getBody(), true)['elements'][0]['handle~'];
     }
 
     /**
-     * Set the user fields to request from LinkedIn.
-     *
-     * @param  array  $fields
-     * @return $this
+     * {@inheritdoc}
      */
-    public function fields(array $fields)
+    protected function mapUserToObject(array $user)
     {
-        $this->fields = $fields;
+        $name = Arr::get($user, 'firstName.localized.en_US').' '.Arr::get($user, 'lastName.localized.en_US');
+        $images = Arr::get($user, 'profilePicture.displayImage~.elements');
+        $avatar = Arr::first(Arr::where($images, function ($image) {
+            return $image['data']['com.linkedin.digitalmedia.mediaartifact.StillImage']['storageSize']['width'] === 100;
+        }));
+        $originalAvatar = Arr::first(Arr::where($images, function ($image) {
+            return $image['data']['com.linkedin.digitalmedia.mediaartifact.StillImage']['storageSize']['width'] === 800;
+        }));
 
-        return $this;
+        return (new User)->setRaw($user)->map([
+            'id' => $user['id'],
+            'nickname' => null,
+            'name' => $name,
+            'email' => Arr::get($user, 'emailAddress'),
+            'avatar' => Arr::get($avatar, 'identifiers.0.identifier'),
+            'avatar_original' => Arr::get($originalAvatar, 'identifiers.0.identifier'),
+        ]);
     }
 }