Added network skill usage

server/game/Game.go

@@ -32,6 +32,7 @@ func NewRouter(game *Game) *Router {
 	router.Get(Login, game.Login)
 	router.Get(PlayerMove, game.Move)
 	router.Get(PlayerJump, game.Jump)
+	router.Get(PlayerUseSkill, game.UseSkill)
 	router.Get(Chat, game.Chat)
 	return router
 }

server/game/Packet.go

@@ -6,15 +6,15 @@ import (
 
 // Byte prefixes to indicate the packet type.
 const (
-	Ping         = 1
-	Login        = 2
-	Logout       = 3
-	PlayerAdd    = 10
-	PlayerRemove = 11
-	PlayerMove   = 12
-	PlayerJump   = 13
-	PlayerAttack = 14
-	Chat         = 20
+	Ping           = 1
+	Login          = 2
+	Logout         = 3
+	PlayerAdd      = 10
+	PlayerRemove   = 11
+	PlayerMove     = 12
+	PlayerJump     = 13
+	PlayerUseSkill = 14
+	Chat           = 20
 )
 
 // Packet represents a single UDP datagram.

server/game/UseSkill.go

@@ -0,0 +1,30 @@
+package game
+
+import (
+	"errors"
+	"net"
+)
+
+var (
+	ErrInvalidPacketLength = errors.New("invalid packet length")
+)
+
+// UseSkill tries to use a player skill.
+func (game *Game) UseSkill(data []byte, address *net.UDPAddr) error {
+	player := game.players.ByAddress(address)
+
+	if player == nil {
+		return ErrUnknownAddress
+	}
+
+	if len(data) != 1 {
+		return ErrInvalidPacketLength
+	}
+
+	slot := data[0]
+	broadcast := []byte(player.ID)
+	broadcast = append(broadcast, slot)
+
+	game.BroadcastOthers(PlayerUseSkill, broadcast, player)
+	return nil
+}