Merge pull request 'new server' (#2) from feauture into main

Reviewed-on: #2

controllers/connection.go

@@ -1,69 +0,0 @@
-package controllers
-
-import (
-	"log"
-	"server/models"
-
-	"github.com/gorilla/websocket"
-)
-
-func (h *Hub) readLoop(conn *websocket.Conn) {
-	var id uint32
-	log.Println("client ws connected")
-
-	defer func() {
-		conn.Close()
-		if id != 0 {
-			h.removeEntity(id)
-			log.Println("entity [player] removed:", id)
-		}
-
-		log.Println("client ws disconnected")
-	}()
-
-	for {
-		_, bytes, err := conn.ReadMessage()
-		if err != nil {
-			return
-		}
-
-		msg, err := models.Decode(bytes)
-		if err != nil {
-			log.Println(err)
-			continue
-		}
-
-		switch msg.Type {
-
-		case MSG_WELCOME:
-			reader := models.NewReader(msg.Payload)
-			log.Println("MSG_WELCOME received", &msg.Payload)
-			id = reader.ReadU32()
-			name := reader.ReadString()
-
-			if h.Entities[id] != nil {
-				h.ErrorMsg("Entity already exists", conn)
-			}
-
-			player := &models.Player{
-				BaseEntity: models.BaseEntity{ID: id},
-				Name:       name,
-			}
-
-			h.addEntity(id, player)
-			h.Clients[id] = conn
-			log.Println("entity [player] added:", id)
-			confimMessage := models.Message{Type: MSG_WELCOME, Payload: []byte{}}
-			conn.WriteMessage(websocket.BinaryMessage, confimMessage.Encode())
-
-		case MSG_INPUT:
-			reader := models.NewReader(msg.Payload)
-			id := reader.ReadU32()
-			x := reader.ReadF32()
-			y := reader.ReadF32()
-			z := reader.ReadF32()
-			h.updateEntityPosition(x, y, z, id)
-			log.Println(h.Entities)
-		}
-	}
-}

controllers/entities.go

@@ -1,31 +0,0 @@
-package controllers
-
-import "server/models"
-
-func (h *Hub) addEntity(id uint32, entity models.Entity) {
-	h.Mu.Lock()
-	defer h.Mu.Unlock()
-
-	h.Entities[id] = entity
-}
-
-func (h *Hub) updateEntityPosition(x, y, z float32, entity_id uint32) {
-	h.Mu.Lock()
-	defer h.Mu.Unlock()
-
-	h.Entities[entity_id].SetPosition(x, y, z)
-}
-
-func (h *Hub) updateEntityRotation(yaw float32, entity_id uint32) {
-	h.Mu.Lock()
-	defer h.Mu.Unlock()
-
-	h.Entities[entity_id].SetYaw(yaw)
-}
-
-func (h *Hub) removeEntity(id uint32) {
-	h.Mu.Lock()
-	defer h.Mu.Unlock()
-
-	delete(h.Entities, id)
-}

controllers/hub.go

@@ -1,30 +0,0 @@
-package controllers
-
-import (
-	"log"
-	"net/http"
-	"server/models"
-	"sync"
-
-	"github.com/gorilla/websocket"
-)
-
-type Hub struct {
-	Entities map[uint32]models.Entity
-	Clients  map[uint32]*websocket.Conn
-	Mu       sync.RWMutex
-}
-
-func NewHub() *Hub {
-	return &Hub{
-		Entities: make(map[uint32]models.Entity),
-		Clients:  make(map[uint32]*websocket.Conn),
-	}
-}
-
-func (h *Hub) Start() {
-	go h.updateWorld()
-	http.HandleFunc("/ws", h.ws)
-	log.Println("Server listen port 8080")
-	log.Fatal(http.ListenAndServe(":8080", nil))
-}

controllers/msg.go

@@ -1,14 +0,0 @@
-package controllers
-
-import (
-	"server/models"
-
-	"github.com/gorilla/websocket"
-)
-
-func (h *Hub) ErrorMsg(msg string, conn *websocket.Conn) {
-	wr := models.Writer{}
-	wr.WriteString(msg)
-	errMsg := &models.Message{Type: 9, Version: 1, Payload: wr.Bytes()}
-	conn.WriteMessage(websocket.BinaryMessage, errMsg.Encode())
-}

controllers/protocol.go

@@ -1,8 +0,0 @@
-package controllers
-
-const (
-	MSG_WELCOME  = 0
-	MSG_INPUT    = 1
-	MSG_SNAPSHOT = 2
-	MSG_EVENT    = 3
-)

controllers/world.go

@@ -1,47 +0,0 @@
-package controllers
-
-import (
-	"server/models"
-	"time"
-
-	"github.com/gorilla/websocket"
-)
-
-func (h *Hub) broadcastSnapshot() {
-	h.Mu.RLock()
-	defer h.Mu.RUnlock()
-
-	w := models.Writer{}
-	w.WriteU16(uint16(len(h.Entities)))
-
-	for _, e := range h.Entities {
-		w.WriteU32(e.GetID())
-		w.WriteU8(uint8(e.GetType()))
-		x, y, z := e.GetPosition()
-		w.WriteF32(x)
-		w.WriteF32(y)
-		w.WriteF32(z)
-		w.WriteF32(e.GetYaw())
-	}
-
-	msg := models.Message{
-		Type:    MSG_SNAPSHOT,
-		Version: 1,
-		Payload: w.Bytes(),
-	}
-
-	for _, conn := range h.Clients {
-		if conn != nil {
-			_ = conn.WriteMessage(websocket.BinaryMessage, msg.Encode())
-		}
-	}
-}
-
-func (h *Hub) updateWorld() {
-	ticker := time.NewTicker(50 * time.Millisecond)
-	defer ticker.Stop()
-
-	for range ticker.C {
-		h.broadcastSnapshot()
-	}
-}

controllers/ws.go

@@ -1,22 +0,0 @@
-package controllers
-
-import (
-	"log"
-	"net/http"
-
-	"github.com/gorilla/websocket"
-)
-
-func (h *Hub) ws(w http.ResponseWriter, r *http.Request) {
-	upgrader := websocket.Upgrader{
-		CheckOrigin: func(r *http.Request) bool { return true },
-	}
-
-	conn, err := upgrader.Upgrade(w, r, nil)
-	if err != nil {
-		log.Println(err)
-		return
-	}
-
-	go h.readLoop(conn)
-}

go.mod

@@ -2,4 +2,7 @@ module server
 
 go 1.25.0
 
-require github.com/gorilla/websocket v1.5.3
+require (
+	github.com/google/uuid v1.6.0
+	github.com/gorilla/websocket v1.5.3
+)

go.sum

@@ -1,2 +1,4 @@
+github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
+github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/gorilla/websocket v1.5.3 h1:saDtZ6Pbx/0u+bgYQ3q96pZgCzfhKXGPqt7kZ72aNNg=
 github.com/gorilla/websocket v1.5.3/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=

main.go

@@ -1,10 +1,63 @@
 package main
 
 import (
-	"server/controllers"
+	"log"
+	"net/http"
+
+	"github.com/google/uuid"
+	"github.com/gorilla/websocket"
 )
 
-func main() {
-	hub := controllers.NewHub()
-	hub.Start()
+var upgrader = websocket.Upgrader{
+	CheckOrigin: func(r *http.Request) bool { return true },
+}
+
+func ServeWS(room *Room, w http.ResponseWriter, r *http.Request) {
+	conn, _ := upgrader.Upgrade(w, r, nil)
+
+	id := uuid.New().String()
+	player := &Player{
+		ID:   id,
+		Conn: conn,
+		X:    180,
+		Y:    320,
+	}
+
+	room.Players[id] = player
+
+	player.Conn.WriteJSON(map[string]any{
+		"type": "init",
+		"payload": map[string]string{
+			"id": id,
+		},
+	})
+
+	go readLoop(room, player)
+}
+
+func readLoop(room *Room, player *Player) {
+	for {
+		var msg InputMessage
+		err := player.Conn.ReadJSON(&msg)
+		if err != nil {
+			delete(room.Players, player.ID)
+			return
+		}
+
+		msg.PlayerID = player.ID
+		room.Input <- msg
+	}
+}
+
+func main() {
+	room := NewRoom()
+
+	go room.Run()
+
+	http.HandleFunc("/ws", func(w http.ResponseWriter, r *http.Request) {
+		ServeWS(room, w, r)
+	})
+
+	log.Println("Server started on :8080")
+	log.Fatal(http.ListenAndServe(":8080", nil))
 }

models/client.go

@@ -1,8 +0,0 @@
-package models
-
-import "github.com/gorilla/websocket"
-
-type Client struct {
-	ID   uint32
-	Conn *websocket.Conn
-}

models/entity.go

@@ -1,51 +0,0 @@
-package models
-
-type EntityType uint8
-
-const (
-	EntityPlayer EntityType = 1
-	EntityNPC    EntityType = 2
-	EntityBullet EntityType = 3
-)
-
-type Entity interface {
-	GetID() uint32
-	GetType() EntityType
-	GetPosition() (float32, float32, float32)
-	SetPosition(float32, float32, float32)
-	GetYaw() float32
-	SetYaw(float32)
-}
-
-type BaseEntity struct {
-	ID      uint32
-	Type    EntityType
-	X, Y, Z float32
-	Yaw     float32
-}
-
-func (e *BaseEntity) GetID() uint32 {
-	return e.ID
-}
-
-func (e *BaseEntity) GetType() EntityType {
-	return e.Type
-}
-
-func (e *BaseEntity) GetPosition() (float32, float32, float32) {
-	return e.X, e.Y, e.Z
-}
-
-func (e *BaseEntity) SetPosition(x, y, z float32) {
-	e.X = x
-	e.Y = y
-	e.Z = z
-}
-
-func (e *BaseEntity) GetYaw() float32 {
-	return e.Yaw
-}
-
-func (e *BaseEntity) SetYaw(yaw float32) {
-	e.Yaw = yaw
-}

models/message.go

@@ -1,48 +0,0 @@
-package models
-
-import (
-	"encoding/binary"
-	"errors"
-)
-
-type Message struct {
-	Type    uint16
-	Version uint16
-	Payload []byte
-}
-
-func (m *Message) Encode() []byte {
-	payloadLen := len(m.Payload)
-	if payloadLen > 0xFFFF {
-		return nil
-	}
-
-	buf := make([]byte, 8+payloadLen)
-
-	binary.LittleEndian.PutUint16(buf[0:2], m.Type)
-	binary.LittleEndian.PutUint16(buf[2:4], m.Version)
-	binary.LittleEndian.PutUint16(buf[4:6], uint16(payloadLen))
-
-	copy(buf[8:], m.Payload)
-	return buf
-}
-
-func Decode(data []byte) (*Message, error) {
-	if len(data) < 8 {
-		return nil, errors.New("message too short")
-	}
-
-	payloadLen := binary.LittleEndian.Uint16(data[4:6])
-	if len(data) != int(8+payloadLen) {
-		return nil, errors.New("invalid payload length")
-	}
-
-	msg := &Message{
-		Type:    binary.LittleEndian.Uint16(data[0:2]),
-		Version: binary.LittleEndian.Uint16(data[2:4]),
-		Payload: make([]byte, payloadLen),
-	}
-
-	copy(msg.Payload, data[8:])
-	return msg, nil
-}

models/player.go

@@ -1,20 +0,0 @@
-package models
-
-type Player struct {
-	BaseEntity
-	Name string
-}
-
-func NewPlayer(id uint32, name string) *Player {
-	return &Player{
-		BaseEntity: BaseEntity{
-			ID:   id,
-			Type: EntityPlayer,
-			X:    0,
-			Y:    0,
-			Z:    0,
-			Yaw:  0,
-		},
-		Name: name,
-	}
-}

models/reader.go

@@ -1,50 +0,0 @@
-package models
-
-import (
-	"encoding/binary"
-	"math"
-)
-
-type Reader struct {
-	buf []byte
-	off int
-}
-
-func NewReader(b []byte) *Reader {
-	return &Reader{buf: b}
-}
-
-func (r *Reader) ReadU8() uint8 {
-	v := r.buf[r.off]
-	r.off++
-	return v
-}
-
-func (r *Reader) ReadU16() uint16 {
-	v := binary.LittleEndian.Uint16(r.buf[r.off:])
-	r.off += 2
-	return v
-}
-
-func (r *Reader) ReadU32() uint32 {
-	v := binary.LittleEndian.Uint32(r.buf[r.off:])
-	r.off += 4
-	return v
-}
-
-func (r *Reader) ReadF32() float32 {
-	v := math.Float32frombits(binary.LittleEndian.Uint32(r.buf[r.off:]))
-	r.off += 4
-	return v
-}
-
-func (r *Reader) ReadBool() bool {
-	return r.ReadU8() == 1
-}
-
-func (r *Reader) ReadString() string {
-	l := r.ReadU16()
-	s := string(r.buf[r.off : r.off+int(l)])
-	r.off += int(l)
-	return s
-}

models/writer.go

@@ -1,49 +0,0 @@
-package models
-
-import (
-	"encoding/binary"
-	"math"
-)
-
-type Writer struct {
-	buf []byte
-}
-
-func (w *Writer) Bytes() []byte {
-	return w.buf
-}
-
-func (w *Writer) WriteU8(v uint8) {
-	w.buf = append(w.buf, v)
-}
-
-func (w *Writer) WriteU16(v uint16) {
-	tmp := make([]byte, 2)
-	binary.LittleEndian.PutUint16(tmp, v)
-	w.buf = append(w.buf, tmp...)
-}
-
-func (w *Writer) WriteU32(v uint32) {
-	tmp := make([]byte, 4)
-	binary.LittleEndian.PutUint32(tmp, v)
-	w.buf = append(w.buf, tmp...)
-}
-
-func (w *Writer) WriteF32(v float32) {
-	tmp := make([]byte, 4)
-	binary.LittleEndian.PutUint32(tmp, math.Float32bits(v))
-	w.buf = append(w.buf, tmp...)
-}
-
-func (w *Writer) WriteBool(v bool) {
-	if v {
-		w.WriteU8(1)
-	} else {
-		w.WriteU8(0)
-	}
-}
-
-func (w *Writer) WriteString(s string) {
-	w.WriteU16(uint16(len(s)))
-	w.buf = append(w.buf, []byte(s)...)
-}

player.go

@@ -0,0 +1,13 @@
+package main
+
+import (
+	"github.com/gorilla/websocket"
+)
+
+type Player struct {
+	ID   string
+	Conn *websocket.Conn
+
+	X, Y   float64
+	DX, DY float64
+}

protocol.go

@@ -0,0 +1,12 @@
+package main
+
+type InputMessage struct {
+	PlayerID string
+	DX       float64 `json:"dx"`
+	DY       float64 `json:"dy"`
+}
+
+type StateMessage struct {
+	Type    string `json:"type"`
+	Payload any    `json:"payload"`
+}

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()
+	}
+}