func run() error {
engine := qml.NewEngine()
component, err := engine.LoadFile("chat.qml")
if err != nil {
fmt.Println("no file to load for ui")
fmt.Println(err.Error())
os.Exit(0)
}
context := engine.Context()
context.SetVar("ctrl", &ctrl)
win := component.CreateWindow(nil)
win.Show() //show window
ctrl.Root = win.Root()
go ctrl.StartControlLoop()
ctrl.UpdatedTextToUI <- "Hello " + peer.MyName + ".\nFor private messages, type the message followed by * and the name of the receiver.\n To leave the conversation type disconnect"
go peer.RunServer(ctrl.UpdatedTextToUI, ctrl.UpdateUserList)
if os.Args[1] != utils.GetMyIP() {
go peer.IntroduceMyself(os.Args[1])
} //connect to the first peer
win.Wait()
closing := peer.Message{"DISCONNECT", peer.MyName, utils.GetMyIP(), "", make([]string, 0), make([]string, 0)}
closing.Send()
return nil
}
// IntroduceMyself introduces peer to the chat
func IntroduceMyself(IP string) {
log.Println("introduceMyself")
conn := createConnection(IP)
enc := json.NewEncoder(conn)
intromessage := Message{"CONNECT", MyName, utils.GetMyIP(), "", make([]string, 0), make([]string, 0)}
// log.Println("sending message: ", intromessage)
err := enc.Encode(intromessage)
if err != nil {
log.Printf("Could not encode msg : %s", err)
}
go receive(conn)
}
// connects with everyone in the chat.
// The Message passed in contains a list of users and ips
func connectToPeers(msg Message) {
for index, ip := range msg.IPs {
conn := createConnection(ip)
mutex.Lock()
usersIPsMap[msg.Usernames[index]] = ip
usersConnectionsMap[msg.Usernames[index]] = conn
mutex.Unlock()
}
users, _ := utils.GetFromMap(usersIPsMap)
updateUserListChan <- users
addMessage := Message{"ADD", MyName, utils.GetMyIP(), "", make([]string, 0), make([]string, 0)}
addMessage.Send()
}
// handle a connection with a new peer
func handleConnect(msg Message, conn net.Conn) bool {
log.Println("handleConnect")
Users, IPs := utils.GetFromMap(usersIPsMap)
Users = append(Users, MyName) //add my name to the list
IPs = append(IPs, utils.GetMyIP()) //add my ip to the list
response := Message{"LIST", "", "", "", Users, IPs}
if _, usernameTaken := usersIPsMap[msg.Username]; usernameTaken {
response.MSG = "Username already taken, choose another one that is not in the list"
response.Send()
return false
}
mutex.Lock()
usersIPsMap[msg.Username] = msg.IP
usersConnectionsMap[msg.Username] = conn
mutex.Unlock()
log.Println(usersConnectionsMap)
response.SendPrivToUser(msg.Username, updateTextChan)
return true
}