astro-domu/internal/app/game_view.go

package app

import (
	"github.com/gdamore/tcell/v2"
	"github.com/jordanorelli/astro-domu/internal/math"
	"github.com/jordanorelli/astro-domu/internal/server/sim"
	"github.com/jordanorelli/astro-domu/internal/wire"
	"github.com/jordanorelli/blammo"
)

type gameView struct {
	*blammo.Log
	room *wire.Room
	me   *wire.Entity
}

func (v *gameView) handleEvent(ui *UI, e tcell.Event) bool {
	switch t := e.(type) {
	case *tcell.EventKey:
		key := t.Key()
		if key == tcell.KeyRune {
			switch t.Rune() {
			case 'w':
				v.move(ui, 0, -1)
			case 'a':
				v.move(ui, -1, 0)
			case 's':
				v.move(ui, 0, 1)
			case 'd':
				v.move(ui, 1, 0)
			}
		}
	default:
		// ui.Debug("screen saw unhandled event of type %T", e)
	}
	return true
}

func (v *gameView) move(ui *UI, dx, dy int) {
	reply, err := ui.client.Send(sim.Move{dx, dy})
	if err != nil {
		return
	}

	e := reply.Body.(*wire.Entity)
	v.room.Entities[e.ID] = e
	v.me = e
}

func (v *gameView) draw(ui *UI) {
	offset := point{1, 1}

	// fill in background dots first
	for x := 0; x < v.room.Width; x++ {
		for y := 0; y < v.room.Height; y++ {
			ui.screen.SetContent(x+offset.x, y+offset.y, '·', nil, tcell.StyleDefault)
		}
	}

	// frame it
	ui.screen.SetContent(offset.x-1, offset.y-1, '┌', nil, tcell.StyleDefault)
	ui.screen.SetContent(offset.x+v.room.Width, offset.y-1, '┐', nil, tcell.StyleDefault)
	ui.screen.SetContent(offset.x-1, offset.y+v.room.Height, '└', nil, tcell.StyleDefault)
	ui.screen.SetContent(offset.x+v.room.Width, offset.y+v.room.Height, '┘', nil, tcell.StyleDefault)
	for x := 0; x < v.room.Width; x++ {
		ui.screen.SetContent(x+offset.x, offset.y-1, '─', nil, tcell.StyleDefault)
		ui.screen.SetContent(x+offset.x, offset.y+v.room.Height, '─', nil, tcell.StyleDefault)
	}
	for y := 0; y < v.room.Height; y++ {
		ui.screen.SetContent(offset.x-1, y+offset.y, '│', nil, tcell.StyleDefault)
		ui.screen.SetContent(offset.x+v.room.Width, y+offset.y, '│', nil, tcell.StyleDefault)
	}

	for _, e := range v.room.Entities {
		pos := e.Position.Add(math.Vec{1, 1})
		ui.screen.SetContent(pos.X, pos.Y, e.Glyph, nil, tcell.StyleDefault)
	}
}