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 #309

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 $fields = [
-        'id', 'first-name', 'last-name', 'formatted-name',
-        'email-address', 'headline', 'location', 'industry',
-        'public-profile-url', 'picture-url', 'picture-urls::(original)',
-    ];
-
     /**
      * {@inheritdoc}
      */
@@ -63,45 +52,73 @@ protected function getTokenFields($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',
             ],
         ]);
 
         return json_decode($response->getBody(), true);
     }
 
     /**
-     * {@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'),
+        ]);
     }
 }