Added basic chat

server/game/Chat.go

@@ -0,0 +1,19 @@
+package game
+
+import (
+	"fmt"
+	"net"
+	"server/game/packet"
+)
+
+// Chat is used for chat messages.
+func (game *Game) Chat(data []byte, address *net.UDPAddr, server *Server) error {
+	player := game.players.Get(address)
+	fmt.Printf("[%s] %s\n", player.Name, string(data))
+
+	newData := []byte{}
+	newData = AppendString(newData, player.ID)
+	newData = AppendStringBytes(newData, data)
+	game.Broadcast(packet.Chat, newData)
+	return nil
+}

server/game/Game.go

@@ -30,7 +30,15 @@ func (game *Game) Run() {
 	<-close
 }
 
-// BroadcastOthers sends the packet to all other players.
+// Broadcast sends the packet to all players.
+func (game *Game) Broadcast(code byte, data []byte) {
+	game.players.Each(func(other *Player) bool {
+		game.server.Send(code, data, other.address)
+		return true
+	})
+}
+
+// BroadcastOthers sends the packet to all other players except the original sender.
 func (game *Game) BroadcastOthers(code byte, data []byte, exclude *Player) {
 	game.players.Each(func(other *Player) bool {
 		if other == exclude {
@@ -55,6 +63,7 @@ func (game *Game) network() {
 	game.server.SetHandler(packet.Login, game.Login)
 	game.server.SetHandler(packet.PlayerMove, game.Move)
 	game.server.SetHandler(packet.PlayerJump, game.Jump)
+	game.server.SetHandler(packet.Chat, game.Chat)
 	game.server.Run(4242)
 }
 

server/game/String.go

@@ -8,3 +8,10 @@ func AppendString(data []byte, str string) []byte {
 	data = append(data, []byte(str)...)
 	return data
 }
+
+// AppendStringBytes appends the length of the string followed by its contents.
+func AppendStringBytes(data []byte, str []byte) []byte {
+	data = binary.LittleEndian.AppendUint32(data, uint32(len(str)))
+	data = append(data, str...)
+	return data
+}

server/game/packet/packet.go

@@ -9,4 +9,5 @@ const (
 	PlayerMove   = 12
 	PlayerJump   = 13
 	PlayerAttack = 14
+	Chat         = 20
 )