new server

room.go

@@ -0,0 +1,69 @@
+package main
+
+import (
+	"time"
+)
+
+type Room struct {
+	Players map[string]*Player
+	Input   chan InputMessage
+}
+
+func NewRoom() *Room {
+	return &Room{
+		Players: make(map[string]*Player),
+		Input:   make(chan InputMessage, 128),
+	}
+}
+
+func (r *Room) update() {
+	for {
+		select {
+		case input := <-r.Input:
+			p := r.Players[input.PlayerID]
+			if p != nil {
+				p.DX = input.DX
+				p.DY = input.DY
+			}
+		default:
+			goto DONE
+		}
+	}
+DONE:
+
+	for _, p := range r.Players {
+		p.X += p.DX * 4
+		p.Y += p.DY * 4
+	}
+}
+
+func (r *Room) broadcast() {
+	state := map[string]map[string]float64{}
+
+	for id, p := range r.Players {
+		state[id] = map[string]float64{
+			"x": p.X,
+			"y": p.Y,
+		}
+	}
+
+	msg := StateMessage{
+		Type: "state",
+		Payload: map[string]any{
+			"players": state,
+		},
+	}
+
+	for _, p := range r.Players {
+		p.Conn.WriteJSON(msg)
+	}
+}
+
+func (r *Room) Run() {
+	ticker := time.NewTicker(time.Second / 30)
+
+	for range ticker.C {
+		r.update()
+		r.broadcast()
+	}
+}