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230 lines
4.8 KiB
Go

package app
import (
"fmt"
"github.com/gdamore/tcell/v2"
"github.com/jordanorelli/astro-domu/internal/exit"
"github.com/jordanorelli/astro-domu/internal/math"
"github.com/jordanorelli/astro-domu/internal/sim"
"github.com/jordanorelli/astro-domu/internal/wire"
"github.com/jordanorelli/blammo"
)
type UI struct {
*blammo.Log
PlayerName string
screen tcell.Screen
room *wire.Room
client *wire.Client
gameView *gameView
chatView *chatView
focussed view
}
func (ui *UI) Run() {
ui.setupTerminal()
defer ui.clearTerminal()
ui.room = new(wire.Room)
if err := ui.connect(); err != nil {
return
}
res, err := ui.client.Send(wire.Login{Name: ui.PlayerName})
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if err != nil {
ui.Error("login error: %v", err)
return
}
welcome, ok := res.Body.(*wire.Welcome)
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if !ok {
ui.Error("unexpected initial message of type %t", res.Body)
return
}
ui.Info("welcome: %v", welcome)
meta := welcome.Players[ui.PlayerName]
room := welcome.Rooms[meta.Room]
ui.room = &room
ui.gameView = &gameView{
Log: ui.Child("game-view"),
room: &room,
me: &wire.Entity{
ID: meta.Avatar,
Glyph: room.Entities[meta.Avatar].Glyph,
Position: room.Entities[meta.Avatar].Position,
},
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}
ui.chatView = &chatView{
Log: ui.Child("chat-view"),
history: make([]sim.ChatMessage, 0, 32),
}
ui.focussed = ui.gameView
ui.Info("running ui")
if ui.handleUserInput() {
ui.Info("user requested close")
ui.Info("closing client")
ui.client.Close()
ui.Info("client closed")
ui.Info("finalizing screen")
}
ui.Info("run loop done, shutting down")
}
func (ui *UI) connect() error {
ui.client = &wire.Client{
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Log: ui.Child("client"),
Host: "127.0.0.1",
Port: 12805,
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}
c, err := ui.client.Dial()
if err != nil {
return fmt.Errorf("unable to dial server: %v", err)
}
go ui.handleNotifications(c)
return nil
}
func (ui *UI) setupTerminal() {
screen, err := tcell.NewScreen()
if err != nil {
exit.WithMessage(1, "unable to create a screen: %v", err)
}
ui.screen = screen
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ui.Debug("sceen created")
if err := screen.Init(); err != nil {
exit.WithMessage(1, "unable to initialize screen: %v", err)
}
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ui.Debug("screen initialized")
width, height := screen.Size()
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ui.Debug("screen width: %d", width)
ui.Debug("screen height: %d", height)
ui.Debug("screen colors: %v", screen.Colors())
ui.Debug("screen has mouse: %v", screen.HasMouse())
}
func (ui *UI) clearTerminal() {
ui.screen.Clear()
ui.screen.Fini()
}
func (ui *UI) handleNotifications(c <-chan wire.Response) {
for n := range c {
if ui.handleNotification(n.Body) {
if ui.gameView != nil {
ui.render()
}
}
}
ui.Info("notifications channel is closed so we must be done")
ui.Info("clearing and finalizing screen from notifications goroutine")
ui.screen.Clear()
ui.screen.Fini()
ui.Info("screen finalized")
}
func (ui *UI) handleNotification(v wire.Value) bool {
switch n := v.(type) {
case *wire.Entity:
ui.room.Entities[n.ID] = *n
return true
case *wire.Frame:
if ui.room == nil {
ui.room = new(wire.Room)
}
ui.room.Entities = n.Entities
return true
case *sim.ChatMessage:
ui.chatView.history = append(ui.chatView.history, *n)
return true
default:
ui.Info("ignoring notification: %v", n)
return false
}
}
// writeString writes a string in the given style from left to right beginning
// at the location (x, y). Writing of the screen just fails silently so don't
// do that.
func (ui *UI) writeString(x, y int, s string, style tcell.Style) {
width, height := ui.screen.Size()
if y > height {
return
}
for i, r := range []rune(s) {
x := x + i
if x > width {
return
}
ui.screen.SetContent(x, y, r, nil, style)
}
}
func (ui *UI) handleUserInput() bool {
ui.screen.Clear()
ui.render()
for {
e := ui.screen.PollEvent()
if e == nil {
ui.Info("run loop sees nil event, breaking out")
// someone else shut us down, so return false
return false
}
switch v := e.(type) {
case *tcell.EventKey:
key := v.Key()
if key == tcell.KeyCtrlC {
ui.Info("saw ctrl+c keyboard input, shutting down")
// we want to shut things down
return true
}
if key == tcell.KeyTab {
ui.Info("saw tab from keyboard input, switching focussed view")
ui.focussed.setFocus(false)
if ui.focussed == ui.gameView {
ui.focussed = ui.chatView
} else {
ui.focussed = ui.gameView
}
ui.focussed.setFocus(true)
goto HANDLED
}
}
ui.focussed.handleEvent(ui, e)
ui.screen.Clear()
ui.render()
ui.screen.Show()
HANDLED:
}
}
func (ui *UI) render() {
width, height := ui.screen.Size()
{
b := newBuffer(width/2, height/2)
ui.gameView.draw(b)
b.blit(ui.screen, math.Vec{0, 0})
}
{
b := newBuffer(width, height/2)
ui.chatView.draw(b)
b.blit(ui.screen, math.Vec{0, height / 2})
}
ui.screen.Show()
}