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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"time"
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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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func messages(cs *ClientState) error {
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
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
}
type ClientState struct {
App *tview.Application
Client proto.GameWorldClient
SessionInfo *proto.SessionInfo
MaxMessages int
messagesView *tview.TextView
messages []*proto.ClientMessage
}
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]
}
cs.App.QueueUpdateDraw(func() {
cs.messagesView.SetText("")
for _, msg := range cs.messages {
fmt.Fprintf(cs.messagesView, "%#v\n", msg)
}
})
}
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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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// TODO registration and login stuff
app := tview.NewApplication()
// TODO make a NewClientState
cs := &ClientState{
App: app,
SessionInfo: &proto.SessionInfo{},
Client: client,
MaxMessages: 15, // TODO for testing
messages: []*proto.ClientMessage{},
}
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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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//stream, err := messageStream(client, sessionInfo)
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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)
mainPage := tview.NewList().
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AddItem("jack in", "connect using an existing account", '1', func() {
pages.SwitchToPage("game")
}).
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AddItem("rez a toon", "create a new account", '2', nil).
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)
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msgView := tview.NewTextView()
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(
tview.NewTextView().SetText("TODO detail window"),
1, 1, 1, 1, 10, 10, false).
AddItem(
tview.NewTextView().SetText("TODO input"),
2, 0, 1, 2, 1, 30, false)
pages.AddPage("game", gamePage, true, false)
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go messages(cs)
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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())
}
}