Opcodes.gd

extends Node

#TREES
const OAK_TREE = "O"

#ORES
const GOLD_ORE = "G"
const SILVER_ORE = "S"
const TIN_ORE = "T"

const TYPE = "T"
const HITS_HP = "H"
const CURRENT_HITS = "C"
const RESPAWN = "R"
const ACTIVE = "A"

#ENEMIES
const ENEMY_TYPE = "T"
const ENEMY_LOCATION = "L"
const ENEMY_CURRENT_HEALTH = "H"
const ENEMY_MAX_HEALTH = "M"
const ENEMY_STATE = "S"
const ENEMY_TIME_OUT = "O"

#WORLD STATE
const TIMESTAMP = "T"
const ENEMIES = "E"
const ORES = "O"

#PLAYER
const PLAYER_ANIMATION_VECTOR = "A"
const PLAYER_POSITION = "P"
const PLAYER_TIMESTAMP = "T"


# Operation codes used to bundle packets from server to client
enum Opcodes {
	TAKE_DAMAGE = 0,
	INVENTORY_OK,
	INVENTORY_NOK,
	REMOVE_ITEM,
	ATTACK_SWING,
	PLAYER_SPAWN,
	PLAYER_DESPAWN,
	PLAYER_DEAD,
	PLAYER_INITIAL_INVENTORY,
	PLAYER_INVENTORY_UPDATE,
	CHAT,
	ENEMY_SPAWN,
	ENEMY_DIED,
	ENEMY_DESPAWN,
	ITEM_CRAFT_OK,
	ITEM_CRAFT_NOK,
	SMELTER_STARTED,
	SMELTER_STOPPED,
	INVENTORY_SLOT_UPDATE,
}
	
enum EnemyState {
	ALIVE,
	DEAD,
}

enum EnemyType {
	SLIME,
	MINO,
	BATSQUITO,
	DEER,
}

# Player chat
static func create_player_chat_packet(player_id, chatstring):
	return { "op_code": Opcodes.CHAT, "content" : chatstring, "player_id": player_id}	

# Confirms inventory operation
static func create_inventory_ok_packet():
	return { "op_code" : Opcodes.INVENTORY_OK }

# Rejects inventory operation
static func create_inventory_nok_packet():
	return { "op_code" : Opcodes.INVENTORY_NOK }

# Despawn an item
static func create_remove_item_packet(item_id : int):
	return { "op_code" : Opcodes.REMOVE_ITEM, "item_id" : item_id }

# PlayerIds are unsinged 31-bit integers. We can differentiate from enemy_id by sign
# Damage done to an entity
static func create_take_damage_packet(attacker : int, victim : int, damage : int):
	return { "op_code" : Opcodes.TAKE_DAMAGE, "attacker" : attacker, "victim" : victim, "damage" : damage }

static func create_enemy_take_damage_packet(attacker : int, victim : int, damage : int):
	return create_take_damage_packet(attacker, -victim, damage)
	
static func create_player_take_damage_packet(attacker : int, victim : int, damage : int):
	return create_take_damage_packet(-attacker, victim, damage)

static func create_player_died_packet(player_id : int, player_position : Vector2):
	return { "op_code" : Opcodes.PLAYER_DEAD, "player_id" : player_id, "player_position" : player_position}

# Attack swing started by an entity
static func create_attack_swing_packet(attacker : int, victim : int):
	return { "op_code" : Opcodes.ATTACK_SWING, "attacker" : attacker, "victim" : victim }

static func create_enemy_attack_swing_packet(attacker: int, victim : int):
	return create_attack_swing_packet(-attacker, victim)

static func create_player_attack_swing_packet(attacker : int, victim : int):
	return create_attack_swing_packet(attacker, -victim)

static func create_player_spawn_packet(player_id : int, position: Vector2, username : String):
	return {"op_code" : Opcodes.PLAYER_SPAWN, "player_id" : player_id, "position" : position, "username" : username}
			
static func create_player_despawn_packet(player_id : int):
	return { "op_code" : Opcodes.PLAYER_DESPAWN, "player_id" : player_id }

static func create_initial_inventory_packet(
	player_id : int,
	head_item_id : int,
	chest_item_id : int,
	legs_item_id : int,
	feet_item_id : int,
	hands_item_id : int):
	return { "op_code" : Opcodes.PLAYER_INITIAL_INVENTORY,
			"player_id" : player_id,
			"head" : head_item_id, 
			"chest" : chest_item_id,
			"legs" : legs_item_id,
			"feet" : feet_item_id, 
			"hands" : hands_item_id }

static func create_inventory_update_packet(player_id : int, slot : int, item_id : int):
	return { "op_code" : Opcodes.PLAYER_INVENTORY_UPDATE, "player_id" : player_id, 
			"slot" : slot, "item_id" : item_id }

static func create_enemy_spawn_packet(enemy_id : int, enemy_state : int, enemy_type : int, health : int, position : Vector2):
	return { "op_code" : Opcodes.ENEMY_SPAWN,
			"enemy_id" : enemy_id,
			"enemy_state" : enemy_state,
			"enemy_type" : enemy_type,
			"health" : health,
			"position" : position }

static func create_enemy_died_packet(enemy_id : int):
	return { "op_code" : Opcodes.ENEMY_DIED, "enemy_id" : enemy_id }

static func create_enemy_despawn_packet(enemy_id):
	return { "op_code" : Opcodes.ENEMY_DESPAWN, "enemy_id" : enemy_id }

static func create_item_craft_ok_packet(slot : int, item_id : int):
	return { "op_code" : Opcodes.ITEM_CRAFT_OK, "slot" : slot, "item_id" : item_id}

static func create_item_craft_nok_packet():
	return { "op_code" : Opcodes.ITEM_CRAFT_NOK }

static func create_smelter_started_packet():
	return { "op_code" : Opcodes.SMELTER_STARTED}
	
static func create_smelter_stopped_packet():
	return { "op_code" : Opcodes.SMELTER_STOPPED}

static func create_inventory_slot_update_packet(slot : int, item_id : int, amount : int):
	return {
		"op_code" : Opcodes.INVENTORY_SLOT_UPDATE,
		"slot" : slot, "item_id" : item_id, "amount" : amount}