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lobby.go
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lobby.go
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package examples
import (
"fmt"
"github.com/fsnotify/fsnotify"
tnetwork "github.com/notassigned/tweb/network"
x "github.com/notassigned/tweb/xmlnode"
)
const LOBBY_FILE = "./lobby.xml"
var view []byte
type nameCheck struct {
name string
available chan bool
}
type Lobby struct {
peers map[string]tnetwork.Peer
all chan string
joined chan *user
left chan *user
getName chan nameCheck
}
type user struct {
name string
peer tnetwork.Peer
}
func NewLobby() *Lobby {
l := &Lobby{
peers: make(map[string]tnetwork.Peer),
all: make(chan string, 1),
joined: make(chan *user),
left: make(chan *user),
getName: make(chan nameCheck),
}
go func() {
for {
select {
case msg, ok := <-l.all:
if !ok {
return
}
addText := x.New("update").SetAttr("id", "chat").SetAttr("write", msg+"\n").Marshal()
for _, p := range l.peers {
p.Stream.MessageStream().Write(addText)
}
case u := <-l.joined:
delete(l.peers, u.name)
l.sendAddPeer(u.name)
l.peers[u.name] = u.peer
l.messageAll(fmt.Sprintf("[green]%s [blue]joined.[white]", u.name))
l.sendPeerList(&u.peer)
l.updateCount(len(l.peers))
fmt.Println("joined")
case u := <-l.left:
delete(l.peers, u.name)
l.messageAll(fmt.Sprintf("[green]%s [red]left.[white]", u.name))
l.sendRemovePeer(u.name)
l.updateCount(len(l.peers))
case x := <-l.getName:
_, exists := l.peers[x.name]
if !exists {
l.peers[x.name] = tnetwork.Peer{}
}
x.available <- !exists
}
}
}()
return l
}
func (l *Lobby) OnJoin(p tnetwork.Peer) {
getLobbyView()
name, e := getName(l, p.Stream)
if e != nil {
fmt.Println(e)
return
}
p.Stream.MessageStream().Write(view)
p.Stream.Write(x.Node("update", map[string]string{"id": "input", "label": name + ">"}))
u := &user{name: name, peer: p}
l.joined <- u
for {
n, e := p.Stream.Read()
if e != nil {
l.left <- u
return
}
if n.Attributes["text"] != "" {
p.Stream.Write(x.New("update").SetAttr("id", "input").SetAttr("text", ""))
l.messageAll(fmt.Sprintf("[green]%s:[white] %s", name, n.Attributes["text"]))
}
}
}
func getName(l *Lobby, ms tnetwork.NodeStream) (name string, e error) {
getName := x.New("rows").AddChild(x.Node("text", map[string]string{
"text": "Lobby",
"color": "lightgreen",
"align": "center",
"size": "1",
})).AddChild(x.Node("input", map[string]string{
"id": "name",
"label": "Enter name: ",
"labelcolor": "lightgreen",
"focus": "true",
"size": "3",
"border": "true",
"bordercolor": "red",
}))
ms.Write(x.New("newpage").AddChild(getName))
for {
resp, e := ms.Read()
if e != nil {
return "", e
}
if name = resp.Attributes["text"]; name != "" {
available := make(chan bool)
l.getName <- nameCheck{name: name, available: available}
if <-available {
return resp.Attributes["text"], nil
}
ms.Write(x.Node("update", map[string]string{
"id": "name",
"text": "",
"placeholder": fmt.Sprintf("Name %s is taken", name),
}))
}
}
}
func getLobbyView() {
getLobby := func() {
node, err := x.CreateNodeFromFile(LOBBY_FILE)
if err != nil {
fmt.Println("Error reading lobby view file:\n", err)
return
} else {
fmt.Println("lobby updated")
view = x.New("newpage").AddChild(node).Marshal()
}
}
getLobby()
go func() {
watcher, err := fsnotify.NewWatcher()
if err != nil {
fmt.Println("NewWatcher failed: ", err)
return
}
defer watcher.Close()
done := make(chan bool)
go func() {
defer close(done)
for {
select {
case _, ok := <-watcher.Events:
if !ok {
return
}
getLobby()
case err, ok := <-watcher.Errors:
if !ok {
return
}
fmt.Println("error:", err)
}
}
}()
}()
}
func (l *Lobby) sendPeerList(p *tnetwork.Peer) {
update := x.Update("peers", nil)
for name := range l.peers {
update.AddChild(x.Node("item", map[string]string{
"text": name,
}))
}
p.Stream.Write(update)
}
func (l *Lobby) sendAddPeer(name string) {
bytes := x.Update("peers", nil).AddChild(x.Node("item", map[string]string{
"text": name,
})).Marshal()
for _, p := range l.peers {
p.Stream.MessageStream().Write(bytes)
}
}
func (l *Lobby) sendRemovePeer(name string) {
bytes := x.Update("peers", map[string]string{
"remove": name,
}).Marshal()
for _, p := range l.peers {
p.Stream.MessageStream().Write(bytes)
}
}
func (l *Lobby) messageAll(msg string) {
fmt.Println(msg)
l.all <- msg
}
func (l *Lobby) updateCount(count int) {
update := x.Node("update", map[string]string{"id": "count", "text": fmt.Sprintf("%d", count)}).Marshal()
for _, p := range l.peers {
p.Stream.MessageStream().Write(update)
}
fmt.Println("count", count)
}