/
service.go
111 lines (97 loc) · 2.72 KB
/
service.go
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package websocket
import (
"sync"
"log"
"github.com/gorilla/websocket"
)
type WebSocketService struct {
clients map[*Client]bool
users map[int]*Client
register chan *Client
unregister chan *Client
broadcast chan *BroadcastInfo
}
var (
service *WebSocketService
once sync.Once
)
func NewWebSocketService() IWebSocketService {
once.Do(func () {
service = &WebSocketService{
clients: make(map[*Client]bool),
users: make(map[int]*Client),
register: make(chan *Client),
unregister: make(chan *Client),
broadcast: make(chan *BroadcastInfo),
}
go service.run()
})
return service
}
func (service *WebSocketService) unregisterClient(client *Client) {
if _, ok := service.users[client.UserId]; ok {
delete(service.users, client.UserId)
}
if _, ok := service.clients[client]; ok {
delete(service.clients, client)
}
}
func (service *WebSocketService) registerClient(client *Client) {
service.clients[client] = true
service.users[client.UserId] = client
}
func (service *WebSocketService) broadcastClients(broadcastInfo *BroadcastInfo) {
if len(broadcastInfo.userIds) > 0 {
for userId := range broadcastInfo.userIds {
client := service.users[userId]
select {
case client.Send <- broadcastInfo.message:
default:
service.unregisterClient(client)
}
}
} else {
for client := range service.clients {
select {
case client.Send <- broadcastInfo.message:
default:
service.unregisterClient(client)
}
}
}
}
func (service *WebSocketService) run() {
for {
select {
case client := <- service.register:
service.registerClient(client)
case client := <- service.unregister:
service.unregisterClient(client)
case broadcastInfo := <- service.broadcast:
service.broadcastClients(broadcastInfo)
}
}
}
func (service *WebSocketService) InitConnection(
connection *websocket.Conn,
userData interface{},
) {
data, ok := userData.(map[string]interface{});
if !ok {
connection.Close()
return
}
userId, ok := data["user_id"].(float64)
if !ok {
connection.Close()
return
}
log.Println("User ", userId, " has been connected")
client := NewClient(service, connection, int(userId))
service.register <- client
go client.InitWriteHandler()
go client.InitReadHandler()
}
func (service *WebSocketService) Broadcast(broadcastInfo *BroadcastInfo) {
service.broadcast <- broadcastInfo
}