added implementation in GO lang

internal/app/app.go

@@ -0,0 +1,119 @@
+package app
+
+import (
+	"math/rand"
+	"time"
+
+	"github.com/hajimehoshi/ebiten/v2"
+	"github.com/hajimehoshi/ebiten/v2/inpututil"
+
+	"kidskeyboard/internal/assets"
+	kbaudio "kidskeyboard/internal/audio"
+	"kidskeyboard/internal/modes"
+)
+
+type Game struct {
+	cfg     Config
+	audio   *kbaudio.Manager
+	assets  *assets.Manager
+	rng     *rand.Rand
+	modes   []modes.Mode
+	current int
+}
+
+func New(cfg Config) *Game {
+	audio := kbaudio.NewManager()
+	assets := assets.NewManager()
+	rng := rand.New(rand.NewSource(time.Now().UnixNano()))
+
+	ctx := modes.Context{
+		Audio:  audio,
+		Assets: assets,
+		RNG:    rng,
+	}
+
+	game := &Game{
+		cfg:    cfg,
+		audio:  audio,
+		assets: assets,
+		rng:    rng,
+		modes: []modes.Mode{
+			modes.NewKeyboardMode(ctx),
+			modes.NewGeometryMode(ctx),
+			modes.NewAnimalMode(ctx),
+			modes.NewCalculatorMode(ctx),
+			modes.NewFindKeyMode(ctx),
+			modes.NewNotImplementedMode("CTRL+F6"),
+			modes.NewNotImplementedMode("CTRL+F7"),
+			modes.NewNotImplementedMode("CTRL+F8"),
+			modes.NewNotImplementedMode("CTRL+F9"),
+			modes.NewNotImplementedMode("CTRL+F10"),
+			modes.NewNotImplementedMode("CTRL+F11"),
+			modes.NewNotImplementedMode("CTRL+F12"),
+		},
+		current: 0,
+	}
+	game.modes[game.current].OnEnter()
+	return game
+}
+
+func (g *Game) Update() error {
+	g.audio.Update()
+
+	if /*ctrlPressed() && */ shiftPressed() && inpututil.IsKeyJustPressed(ebiten.KeyEscape) {
+		return ebiten.Termination
+	}
+
+	if ctrlPressed() {
+		for i, key := range modeKeys() {
+			if inpututil.IsKeyJustPressed(key) {
+				g.switchMode(i)
+				return nil
+			}
+		}
+	}
+
+	g.modes[g.current].HandleInput()
+	g.modes[g.current].Update()
+	return nil
+}
+
+func (g *Game) Draw(screen *ebiten.Image) {
+	g.modes[g.current].Draw(screen)
+}
+
+func (g *Game) Layout(outsideWidth, outsideHeight int) (int, int) {
+	if outsideWidth <= 0 || outsideHeight <= 0 {
+		return g.cfg.WindowWidth, g.cfg.WindowHeight
+	}
+	return outsideWidth, outsideHeight
+}
+
+func (g *Game) switchMode(next int) {
+	if next < 0 || next >= len(g.modes) || next == g.current {
+		return
+	}
+	g.modes[g.current].OnLeave()
+	g.current = next
+	g.modes[g.current].OnEnter()
+}
+
+func ctrlPressed() bool {
+	return ebiten.IsKeyPressed(ebiten.KeyControlLeft) ||
+		ebiten.IsKeyPressed(ebiten.KeyControlRight) ||
+		ebiten.IsKeyPressed(ebiten.KeyControl)
+}
+
+func shiftPressed() bool {
+	return ebiten.IsKeyPressed(ebiten.KeyShiftLeft) ||
+		ebiten.IsKeyPressed(ebiten.KeyShiftRight) ||
+		ebiten.IsKeyPressed(ebiten.KeyShift)
+}
+
+func modeKeys() []ebiten.Key {
+	return []ebiten.Key{
+		ebiten.KeyF1, ebiten.KeyF2, ebiten.KeyF3, ebiten.KeyF4,
+		ebiten.KeyF5, ebiten.KeyF6, ebiten.KeyF7, ebiten.KeyF8,
+		ebiten.KeyF9, ebiten.KeyF10, ebiten.KeyF11, ebiten.KeyF12,
+	}
+}