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chat.go
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chat.go
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package transport
import (
"encoding/json"
"fmt"
"log"
"github.com/adrian-lin-1-0-0/scaling-websocket-demo/domain"
"golang.org/x/net/websocket"
)
type chatService struct {
userUsecase domain.UserUsecase
}
func NewChatService(userUsecase domain.UserUsecase) *chatService {
return &chatService{
userUsecase: userUsecase,
}
}
func (s chatService) Handler(ws *websocket.Conn) {
userId := ws.Request().URL.Query().Get("userId")
log.Default().Println("New connection userId : ", userId)
receiver, err := s.userUsecase.Register(domain.UserId(userId))
if err != nil {
fmt.Println("Can't register", err)
panic(err)
}
go func() {
for {
msg := <-receiver
fmt.Println("Reciver message", msg)
bytes, err := json.Marshal(msg)
if err != nil {
fmt.Println("Can't marshal", err)
break
}
if err = websocket.Message.Send(ws, bytes); err != nil {
fmt.Println("Can't send :", err)
break
}
}
}()
for {
var request domain.Message
data := make([]byte, 1024)
n, err := ws.Read(data)
if err != nil {
log.Println("Can't receive", err)
break
}
err = json.Unmarshal(data[:n], &request)
if err != nil {
log.Println("Can't unmarshal", err)
break
}
request.UserId = domain.UserId(userId)
s.userUsecase.Send(request)
}
}