go_study/bilibili/aceld/IM-System/user.go

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package main
import "net"
type User struct {
Name string
Addr string
C chan string
conn net.Conn
server *Server // 当前客户端所属的Server
}
// 创建一个User的API
func NewUser(conn net.Conn, server *Server) *User {
userAddr := conn.RemoteAddr().String()
user := &User{
Name: userAddr,
Addr: userAddr,
C: make(chan string),
conn: conn,
server: server,
}
// 启动监听当前user channel的goroutine
go user.ListenMessage()
return user
}
// User类的成员方法用户上线处理
func (user *User) Online() {
// 用户上线将用户加入到server的OnlineMap中
user.server.mapLock.Lock()
user.server.OnlineMap[user.Name] = user
user.server.mapLock.Unlock()
// 广播当前用户上线消息
user.server.BroadCast(user, "已上线")
}
// User类的成员方法用户下线处理
func (user *User) Offline() {
// 用户下线将用户从server的OnlineMap中删除
user.server.mapLock.Lock()
delete(user.server.OnlineMap, user.Name)
user.server.mapLock.Unlock()
// 广播当前用户下线消息
user.server.BroadCast(user, "下线了")
}
// User类的成员方法处理用户消息
func (user *User) DoMessage(msg string) {
user.server.BroadCast(user, msg)
}
// User类的成员方法: 监听消息
func (user *User) ListenMessage() {
for {
msg := <-user.C
user.conn.Write([]byte(msg + "\n"))
}
}