Add missing GRPC data field (#412)

* feat(grpc): add support for data field in request body

* docs: update Readme with embedmd

rpc/example/go/send/main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"context"
+	structpb "github.com/golang/protobuf/ptypes/struct"
 	"log"
 
 	"github.com/appleboy/gorush/rpc/proto"
@@ -36,6 +37,16 @@ func main() {
 			LocKey:   "Test loc key",
 			LocArgs:  []string{"test", "test"},
 		},
+		Data: &structpb.Struct{
+			Fields: map[string]*structpb.Value{
+				"key1": {
+					Kind: &structpb.Value_StringValue{StringValue: "welcome"},
+				},
+				"key2": {
+					Kind: &structpb.Value_NumberValue{NumberValue: 2},
+				},
+			},
+		},
 	})
 	if err != nil {
 		log.Fatalf("could not greet: %v", err)

rpc/proto/gorush.proto

@@ -1,4 +1,5 @@
 syntax = "proto3";
+import "google/protobuf/struct.proto";
 
 package proto;
 
@@ -29,6 +30,7 @@ message NotificationRequest {
   bool contentAvailable = 11;
   string threadID = 12;
   bool mutableContent = 13;
+  google.protobuf.Struct data = 14;
 }
 
 message NotificationReply {

rpc/server.go

@@ -82,6 +82,13 @@ func (s *Server) Send(ctx context.Context, in *proto.NotificationRequest) (*prot
 		}
 	}
 
+	if in.Data != nil {
+		notification.Data = map[string]interface{}{}
+		for k, v := range in.Data.Fields {
+			notification.Data[k] = v
+		}
+	}
+
 	go gorush.SendNotification(notification)
 
 	return &proto.NotificationReply{