add graphql

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

graphql/goreference.go

@@ -0,0 +1,30 @@
+package generator
+
+import (
+	"google.golang.org/protobuf/compiler/protogen"
+)
+
+type GoRef interface {
+	FindGoField(field string) *protogen.Field
+}
+
+func NewGoRef(p *protogen.Plugin) (GoRef, error) {
+	return goRef{p}, nil
+}
+
+type goRef struct {
+	*protogen.Plugin
+}
+
+func (g goRef) FindGoField(field string) *protogen.Field {
+	for _, file := range g.Files {
+		for _, msg := range file.Messages {
+			for _, f := range msg.Fields {
+				if string(f.Desc.FullName()) == field {
+					return f
+				}
+			}
+		}
+	}
+	return nil
+}