implementing storing chest data into Manager.Screens in bot/screen (#279)

bot/msg/chat.go

@@ -175,6 +175,30 @@ func (m *Manager) SendMessage(msg string) error {
 	return err
 }
 
+// SendMessage send chat message to server.
+// Doesn't support sending message with signature currently.
+func (m *Manager) SendCommand(command string) error {
+	if len(command) > 256 {
+		return errors.New("message length greater than 256")
+	}
+	var salt int64
+	if err := binary.Read(rand.Reader, binary.BigEndian, &salt); err != nil {
+		return err
+	}
+
+	err := m.c.Conn.WritePacket(pk.Marshal(
+		packetid.ServerboundChatCommand,
+		pk.String(command),
+		pk.Long(time.Now().UnixMilli()),
+		pk.Long(salt),
+		pk.Ary[pk.VarInt]{Ary: []pk.Tuple{}},
+		sign.HistoryUpdate{
+			Acknowledged: pk.NewFixedBitSet(20),
+		},
+	))
+	return err
+}
+
 var (
 	InvalidChatPacket       = errors.New("invalid chat packet")
 	ValidationFailed  error = bot.DisconnectErr(chat.TranslateMsg("multiplayer.disconnect.chat_validation_failed"))

bot/screen/chest.go

@@ -0,0 +1,39 @@
+package screen
+
+import (
+	"errors"
+
+	"github.com/Tnze/go-mc/chat"
+	"github.com/Tnze/go-mc/data/inventory"
+)
+
+type Chest struct {
+	Type  inventory.InventoryID
+	Title chat.Message
+	Slots []Slot
+	Rows  int
+}
+
+func (c *Chest) onSetSlot(i int, slot Slot) error {
+	if i < 0 || i >= len(c.Slots) {
+		return errors.New("slot index out of bounds")
+	}
+	c.Slots[i] = slot
+	return nil
+}
+
+func (c *Chest) onClose() error {
+	return nil
+}
+
+func (c *Chest) Container() []Slot {
+	return c.Slots[0 : c.Rows*9]
+}
+
+func (c *Chest) Main() []Slot {
+	return c.Slots[c.Rows*9 : c.Rows*9+27]
+}
+
+func (c *Chest) Hotbar() []Slot {
+	return c.Slots[c.Rows*9+27 : (c.Rows+4)*9]
+}

bot/screen/events.go

@@ -1,7 +1,9 @@
 package screen
 
+import "github.com/Tnze/go-mc/chat"
+
 type EventsListener struct {
-	Open    func(id int) error
+	Open    func(id int, container_type int32, title chat.Message) error
 	SetSlot func(id, index int) error
 	Close   func(id int) error
 }

bot/screen/screen.go

@@ -81,11 +81,23 @@ func (m *Manager) onOpenScreen(p pk.Packet) error {
 	if err := p.Scan(&ContainerID, &Type, &Title); err != nil {
 		return Error{err}
 	}
-	//if c, ok := m.Screens[byte(ContainerID)]; ok {
+	if _, ok := m.Screens[int(ContainerID)]; !ok {
-	// TODO: Create the specified container
+		TypeInt32 := int32(Type)
-	//}
+		if TypeInt32 < 6 {
+			Rows := TypeInt32 + 1
+			chest := Chest{
+				Type:  TypeInt32,
+				Slots: make([]Slot, 9*Rows),
+				Rows:  int(Rows),
+				Title: Title,
+			}
+			m.Screens[int(ContainerID)] = &chest
+		}
+	} else {
+		return errors.New("container id already exists in screens")
+	}
 	if m.events.Open != nil {
-		if err := m.events.Open(int(ContainerID)); err != nil {
+		if err := m.events.Open(int(ContainerID), int32(Type), Title); err != nil {
 			return Error{err}
 		}
 	}

data/inventory/inventory.go

@@ -0,0 +1,143 @@
+package inventory
+
+type InventoryID = int32
+
+const (
+	Generic9x1 InventoryID = iota
+	Generic9x2
+	Generic9x3
+	Generic9x4
+	Generic9x5
+	Generic9x6
+	Generic3x3
+	Crafter3x3
+	Anvil
+	Beacon
+	BlastFurnace
+	BrewingStand
+	Crafting
+	Enchantment
+	Furnace
+	Grindstone
+	Hopper
+	Lectern
+	Loom
+	Merchant
+	ShulkerBox
+	Smithing
+	Smoker
+	Cartography
+	Stonecutter
+)
+
+func IDToName(t InventoryID) string {
+	switch t {
+	case Generic9x1:
+		return "generic_9x1"
+	case Generic9x2:
+		return "generic_9x2"
+	case Generic9x3:
+		return "generic_9x3"
+	case Generic9x4:
+		return "generic_9x4"
+	case Generic9x5:
+		return "generic_9x5"
+	case Generic9x6:
+		return "generic_9x6"
+	case Generic3x3:
+		return "generic_3x3"
+	case Crafter3x3:
+		return "crafter_3x3"
+	case Anvil:
+		return "anvil"
+	case Beacon:
+		return "beacon"
+	case BlastFurnace:
+		return "blast_furnace"
+	case BrewingStand:
+		return "brewing_stand"
+	case Crafting:
+		return "crafting"
+	case Enchantment:
+		return "enchantment"
+	case Furnace:
+		return "furnace"
+	case Grindstone:
+		return "grindstone"
+	case Hopper:
+		return "hopper"
+	case Lectern:
+		return "lectern"
+	case Loom:
+		return "loom"
+	case Merchant:
+		return "merchant"
+	case ShulkerBox:
+		return "shulker_box"
+	case Smithing:
+		return "smithing"
+	case Smoker:
+		return "smoker"
+	case Cartography:
+		return "cartography"
+	case Stonecutter:
+		return "stonecutter"
+	}
+	return ""
+}
+
+func NameToID(name string) InventoryID {
+	switch name {
+	case "generic_9x1":
+		return Generic9x1
+	case "generic_9x2":
+		return Generic9x2
+	case "generic_9x3":
+		return Generic9x3
+	case "generic_9x4":
+		return Generic9x4
+	case "generic_9x5":
+		return Generic9x5
+	case "generic_9x6":
+		return Generic9x6
+	case "generic_3x3":
+		return Generic3x3
+	case "crafter_3x3":
+		return Crafter3x3
+	case "anvil":
+		return Anvil
+	case "beacon":
+		return Beacon
+	case "blast_furnace":
+		return BlastFurnace
+	case "brewing_stand":
+		return BrewingStand
+	case "crafting":
+		return Crafting
+	case "enchantment":
+		return Enchantment
+	case "furnace":
+		return Furnace
+	case "grindstone":
+		return Grindstone
+	case "hopper":
+		return Hopper
+	case "lectern":
+		return Lectern
+	case "loom":
+		return Loom
+	case "merchant":
+		return Merchant
+	case "shulker_box":
+		return ShulkerBox
+	case "smithing":
+		return Smithing
+	case "smoker":
+		return Smoker
+	case "cartography":
+		return Cartography
+	case "stonecutter":
+		return Stonecutter
+	}
+	return -1
+}