Fetch user first name and last name from Apple Sign-In

Author: Erol

providers/apple/apple.go

@@ -140,6 +140,8 @@ func (p Provider) FetchUser(session goth.Session) (goth.User, error) {
 		AccessToken:  s.AccessToken,
 		RefreshToken: s.RefreshToken,
 		ExpiresAt:    s.ExpiresAt,
+		FirstName:    s.FirstName,
+		LastName:     s.LastName,
 	}, nil
 }
 

providers/apple/apple_test.go

@@ -93,6 +93,7 @@ func TestAuthorize(t *testing.T) {
 
 	_, err := session.Authorize(p, url.Values{
 		"code": []string{"<authorization code from successful authentication>"},
+		"user": []string{"{\"first_name\":\"John\",\"last_name\":\"Doe\"}"},
 	})
 	if err != nil {
 		errStr := err.Error()

providers/apple/session.go

@@ -32,6 +32,8 @@ type Session struct {
 	AccessToken  string
 	RefreshToken string
 	ExpiresAt    time.Time
+	FirstName    string
+	LastName     string
 	ID
 }
 
@@ -119,6 +121,20 @@ func (s *Session) Authorize(provider goth.Provider, params goth.Params) (string,
 			IsPrivateEmail: idToken.Claims.(*IDTokenClaims).IsPrivateEmail.Value(),
 			EmailVerified:  idToken.Claims.(*IDTokenClaims).EmailVerified.Value(),
 		}
+
+		if user := params.Get("user"); user != "" {
+			var userData struct {
+				Name struct {
+					FirstName string `json:"firstName"`
+					LastName  string `json:"lastName"`
+				} `json:"name"`
+				Email string `json:"email"`
+			}
+			if err := json.Unmarshal([]byte(user), &userData); err == nil {
+				s.FirstName = userData.Name.FirstName
+				s.LastName = userData.Name.LastName
+			}
+		}
 	}
 
 	return token.AccessToken, err