hermeticum/client/cmd/main.go

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package main
import (
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"context"
"errors"
"flag"
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"fmt"
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"io"
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"log"
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"strings"
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"time"
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"github.com/gdamore/tcell/v2"
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"github.com/rivo/tview"
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"github.com/vilmibm/hermeticum/proto"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials/insecure"
)
var (
tls = flag.Bool("tls", false, "Connection uses TLS if true, else plain TCP")
caFile = flag.String("ca_file", "", "The file containing the CA root cert file")
serverAddr = flag.String("addr", "localhost:6666", "The server address in the format of host:port")
serverHostOverride = flag.String("server_host_override", "x.test.example.com", "The server name used to verify the hostname returned by the TLS handshake")
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)
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type ClientState struct {
App *tview.Application
Client proto.GameWorldClient
SessionInfo *proto.SessionInfo
MaxMessages int
messagesView *tview.TextView
messages []*proto.ClientMessage
cmdStream proto.GameWorld_CommandsClient
}
func (cs *ClientState) Messages() error {
ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
stream, err := cs.Client.Messages(ctx, cs.SessionInfo)
if err != nil {
return err
}
for {
msg, err := stream.Recv()
if err == io.EOF {
break
}
if err != nil {
return err
}
cs.AddMessage(msg)
}
return nil
}
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func (cs *ClientState) HandleInput(input string) error {
var verb string
rest := input
if strings.HasPrefix(input, "/") {
input = input[1:]
parts := strings.SplitN(input, " ", 1)
verb = parts[0]
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if len(parts) > 1 {
rest = parts[1]
}
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} else {
verb = "say"
}
cmd := &proto.Command{
SessionInfo: cs.SessionInfo,
Verb: verb,
Rest: rest,
}
// TODO I'm punting on handling CommandAcks for now but it will be a nice UX thing later for showing connectivity problems
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err := cs.cmdStream.Send(cmd)
if err != nil {
return err
}
if verb == "quit" || verb == "q" {
cs.App.Stop()
}
return nil
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}
func (cs *ClientState) InitCommandStream() error {
ctx := context.Background()
stream, err := cs.Client.Commands(ctx)
if err != nil {
return err
}
cs.cmdStream = stream
return nil
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}
func (cs *ClientState) AddMessage(msg *proto.ClientMessage) {
// TODO i don't like this function
cs.messages = append(cs.messages, msg)
if len(cs.messages) > cs.MaxMessages {
cs.messages = cs.messages[1 : len(cs.messages)-1]
}
// TODO look into using the SetChangedFunc thing.
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cs.App.QueueUpdateDraw(func() {
// TODO trim content of messagesView /or/ see if tview has a buffer size that does it for me. use cs.messages to re-constitute.
fmt.Fprintf(cs.messagesView, "%s: %s\n", msg.GetSpeaker(), msg.GetText())
cs.messagesView.ScrollToEnd()
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})
}
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func _main() error {
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var opts []grpc.DialOption
if *tls {
return errors.New("TODO tls unsupported")
/*
if *caFile == "" {
*caFile = data.Path("x509/ca_cert.pem")
}
creds, err := credentials.NewClientTLSFromFile(*caFile, *serverHostOverride)
if err != nil {
log.Fatalf("Failed to create TLS credentials %v", err)
}
opts = append(opts, grpc.WithTransportCredentials(creds))
*/
} else {
opts = append(opts, grpc.WithTransportCredentials(insecure.NewCredentials()))
}
conn, err := grpc.Dial(*serverAddr, opts...)
if err != nil {
return fmt.Errorf("fail to dial: %w", err)
}
defer conn.Close()
client := proto.NewGameWorldClient(conn)
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app := tview.NewApplication()
// TODO make a NewClientState
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// TODO rename this, like, UI
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cs := &ClientState{
App: app,
SessionInfo: &proto.SessionInfo{},
Client: client,
MaxMessages: 15, // TODO for testing
messages: []*proto.ClientMessage{},
}
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err = cs.InitCommandStream()
if err != nil {
return fmt.Errorf("could not create command stream: %w", err)
}
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ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
defer cancel()
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pong, err := cs.Client.Ping(ctx, cs.SessionInfo)
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if err != nil {
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log.Fatalf("%v.Ping -> %v", cs.Client, err)
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}
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log.Printf("%#v", pong)
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pages := tview.NewPages()
pages.AddPage("splash",
tview.NewModal().
AddButtons([]string{"hey. let's go"}).
SetDoneFunc(func(_ int, _ string) {
pages.SwitchToPage("main")
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app.ResizeToFullScreen(pages)
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}).SetText("h e r m e t i c u m"),
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true,
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true)
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commandInput := tview.NewInputField().SetLabel("> ")
handleInput := func(_ tcell.Key) {
input := commandInput.GetText()
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// TODO command history
commandInput.SetText("")
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// TODO do i need to clear the input's text?
go cs.HandleInput(input)
}
commandInput.SetDoneFunc(handleInput)
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mainPage := tview.NewList().
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AddItem("jack in", "connect using an existing account", '1', func() {
pages.SwitchToPage("login")
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}).
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AddItem("rez a toon", "create a new account", '2', func() {
pages.SwitchToPage("register")
}).
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AddItem("open the hood", "client configuration", '3', nil).
AddItem("get outta here", "quit the client", '4', func() {
app.Stop()
})
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pages.AddPage("main", mainPage, true, false)
lunfi := tview.NewInputField().SetLabel("account name")
lpwfi := tview.NewInputField().SetLabel("password").SetMaskCharacter('~')
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loginPage := tview.NewForm().AddFormItem(lunfi).AddFormItem(lpwfi).
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SetCancelFunc(func() {
pages.SwitchToPage("main")
})
loginSubmitFn := func() {
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
defer cancel()
si, err := cs.Client.Login(ctx, &proto.AuthInfo{
Username: lunfi.GetText(),
Password: lpwfi.GetText(),
})
if err != nil {
panic(err.Error())
}
cs.SessionInfo = si
pages.SwitchToPage("game")
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app.SetFocus(commandInput)
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// TODO error handle
go cs.Messages()
}
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// TODO login and register pages should refuse blank entries
// TODO password should have rules
loginPage.AddButton("gimme that shit", loginSubmitFn)
loginPage.AddButton("nah get outta here", func() {
pages.SwitchToPage("main")
})
pages.AddPage("login", loginPage, true, false)
runfi := tview.NewInputField().SetLabel("account name")
rpwfi := tview.NewInputField().SetLabel("password").SetMaskCharacter('~')
registerPage := tview.NewForm().AddFormItem(runfi).AddFormItem(rpwfi).
SetCancelFunc(func() {
pages.SwitchToPage("main")
})
registerSubmitFn := func() {
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ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
defer cancel()
si, err := cs.Client.Register(ctx, &proto.AuthInfo{
Username: runfi.GetText(),
Password: rpwfi.GetText(),
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})
if err != nil {
panic(err.Error())
}
cs.SessionInfo = si
pages.SwitchToPage("game")
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app.SetFocus(commandInput)
// TODO error handle
go cs.Messages()
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}
registerPage.AddButton("gimme that shit", registerSubmitFn)
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registerPage.AddButton("nah get outta here", func() {
pages.SwitchToPage("main")
})
pages.AddPage("register", registerPage, true, false)
msgView := tview.NewTextView().SetScrollable(true).SetWrap(true).SetWordWrap(true)
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cs.messagesView = msgView
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gamePage := tview.NewGrid().
SetRows(1, 40, 3).
SetColumns(-1, -1).
SetBorders(true).
AddItem(
tview.NewTextView().SetTextAlign(tview.AlignLeft).SetText("h e r m e t i c u m"),
0, 0, 1, 1, 1, 1, false).
AddItem(
tview.NewTextView().SetTextAlign(tview.AlignRight).SetText("TODO server status"),
0, 1, 1, 1, 1, 1, false).
AddItem(
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msgView,
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1, 0, 1, 1, 10, 20, false).
AddItem(
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tview.NewTextView().SetText("TODO details"),
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1, 1, 1, 1, 10, 10, false).
AddItem(
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commandInput,
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2, 0, 1, 2, 1, 30, false)
pages.AddPage("game", gamePage, true, false)
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return app.SetRoot(pages, true).SetFocus(pages).Run()
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}
func main() {
err := _main()
if err != nil {
log.Fatal(err.Error())
}
}