Add additional scopes option

authentication/google/http/google_auth.go

@@ -50,13 +50,34 @@ type Environment struct {
 	IsLocal      bool
 }
 
-func NewGoogleAuth(db Database, server *http.ServeMux, environment Environment, sessionStore *sessions.CookieStore) *GoogleAuth {
+type GoogleAuthParams struct {
+	AdditionalScopes []string
+}
+
+type GoogleAuthOption func(p *GoogleAuthParams)
+
+func WithAdditionalScopes(scopes []string) GoogleAuthOption {
+	return func(p *GoogleAuthParams) {
+		p.AdditionalScopes = scopes
+	}
+}
+
+func NewGoogleAuth(db Database, server *http.ServeMux, environment Environment, sessionStore *sessions.CookieStore,
+	options ...GoogleAuthOption) *GoogleAuth {
+
+	params := GoogleAuthParams{}
+	for _, option := range options {
+		option(&params)
+	}
+	scopes := []string{"https://www.googleapis.com/auth/userinfo.email"}
+	scopes = append(scopes, params.AdditionalScopes...)
+
 	config := oauth2.Config{
 		ClientID:     environment.ClientId,
 		ClientSecret: environment.ClientSecret,
 		Endpoint:     google.Endpoint,
 		RedirectURL:  environment.BaseUrl + GoogleLoginCallback,
-		Scopes:       []string{"https://www.googleapis.com/auth/userinfo.email"},
+		Scopes:       scopes,
 	}
 	return &GoogleAuth{
 		db:           db,