193 lines
5.9 KiB
GDScript
193 lines
5.9 KiB
GDScript
extends Node
|
|
|
|
"""
|
|
This module is responsible for making a WebSocket connection to the signaller
|
|
in order to enable establishish WebRTC P2P connections. Another module is
|
|
expected to fully setup the peer connections.
|
|
"""
|
|
|
|
const DISPLAY_NAME_FILE = "user://display_name.txt"
|
|
const DEFAULT_DISPLAY_NAME = "UnnamedPlayer"
|
|
|
|
# lobby data
|
|
signal lobby_data_received(lobbies)
|
|
signal lobby_joined(lobby_and_peer)
|
|
signal lobby_left(id)
|
|
signal lobby_delete(id)
|
|
|
|
# peer data
|
|
signal peer_data_received(peers)
|
|
signal peer_left(id)
|
|
|
|
# WebRTC negotiations
|
|
signal candidate_received(cand)
|
|
signal offer_received(data)
|
|
signal answer_received(data)
|
|
|
|
# underlying websocket
|
|
signal received_message
|
|
signal connected
|
|
signal connection_failure
|
|
signal disconnected
|
|
|
|
onready var websocket: WebSocketClient = WebSocketClient.new()
|
|
# TODO: setget these?
|
|
onready var client_id = null
|
|
onready var display_name = DEFAULT_DISPLAY_NAME setget set_display_name
|
|
onready var peer_id = null
|
|
|
|
var websocket_url = null
|
|
|
|
func _init(url):
|
|
websocket_url = url
|
|
|
|
func _ready():
|
|
display_name = _load_display_name()
|
|
websocket.connect("data_received", self, "_handle_data")
|
|
websocket.connect("connection_established", self, "_connected")
|
|
# websocket.connect("connection_succeeded", self, "_connection_succeeded")
|
|
websocket.connect("connection_closed", self, "_closed")
|
|
websocket.connect("connection_error", self, "_connection_error", [false])
|
|
websocket.connect("connection_failed", self, "_connection_error", [false])
|
|
websocket.connect("server_close_request", self, "_close_request")
|
|
|
|
func connect_websocket():
|
|
close()
|
|
print("Attempting to connect to WebSocket signalling server at %s" % websocket_url)
|
|
var result = websocket.connect_to_url(websocket_url)
|
|
if result != OK:
|
|
print("Failed to connect to WebSocket signalling server at %s: %s" % [websocket_url, result])
|
|
|
|
func close():
|
|
websocket.disconnect_from_host()
|
|
|
|
func set_display_name(new_display_name: String):
|
|
display_name = new_display_name
|
|
_send("update_display_name:%s" % display_name)
|
|
|
|
func request_lobby_list():
|
|
return _send("request_lobby_list")
|
|
|
|
func join_lobby(id: String):
|
|
return _send("lobby_join:%s" % id)
|
|
|
|
func create_lobby():
|
|
return _send("lobby_create")
|
|
|
|
func is_host(): return peer_id == 1
|
|
|
|
func set_lobby_name(s: String):
|
|
if is_host(): _send_json({"name": s}, "update_lobby")
|
|
|
|
func lock_lobby():
|
|
if is_host(): _send_json({"locked": true}, "update_lobby")
|
|
|
|
func set_lobby_max_players(n: int):
|
|
if is_host(): _send_json({"maxPlayers": n}, "update_lobby")
|
|
|
|
func request_peer_list(): _send("request_peer_list")
|
|
|
|
func send_candidate(peerId, mid, index, sdp) -> int:
|
|
return _send_json({"peerId": peerId, "mid": mid, "index": index, "sdp": sdp}, "candidate")
|
|
|
|
func send_offer(peerId, offer) -> int:
|
|
return _send_json({"peerId": peerId, "offer": offer }, "offer")
|
|
|
|
func send_answer(peerId, answer) -> int:
|
|
return _send_json({"peerId": peerId, "answer": answer }, "answer")
|
|
|
|
func _closed(code):
|
|
print("WebSocket closed: %s: " % code)
|
|
emit_signal("disconnected")
|
|
|
|
func _close_request(code: int, reason: String):
|
|
print("Received WebSocket close request from signalling server - Code: %s, Reason: %s" % [code, reason])
|
|
# TODO: does this fire _closed?
|
|
|
|
func _connected(protocol = ""):
|
|
print("Signaller connected via WebSocket using protocol %s" % protocol)
|
|
websocket.get_peer(1).set_write_mode(WebSocketPeer.WRITE_MODE_TEXT)
|
|
emit_signal("connected")
|
|
_send_json({name = display_name}, "init")
|
|
|
|
func _process(_delta: float):
|
|
var status: int = websocket.get_connection_status()
|
|
if status == WebSocketClient.CONNECTION_CONNECTED or status == WebSocketClient.CONNECTION_CONNECTING:
|
|
websocket.poll()
|
|
|
|
func _handle_data():
|
|
var msg: String = websocket.get_peer(1).get_packet().get_string_from_utf8()
|
|
if msg.begins_with("json:"):
|
|
var data = JSON.parse(msg.substr(5))
|
|
if data.error == OK:
|
|
_process_message(data.result)
|
|
var _result = websocket.get_peer(1).put_packet("".to_utf8())
|
|
else:
|
|
print("Unhandled message: %s" % msg)
|
|
|
|
func _process_message(data: Dictionary):
|
|
match data["type"]:
|
|
"init":
|
|
client_id = data.id
|
|
print("Signaller Received init response: %s" % data)
|
|
"your_peer_id":
|
|
peer_id = int(data.peerId)
|
|
emit_signal("peer_id_set", peer_id)
|
|
|
|
"lobby_data": emit_signal("lobby_data_received", data.data)
|
|
"lobby_delete": emit_signal("lobby_delete", data.id)
|
|
|
|
"lobby_joined":
|
|
peer_id = data.peerId
|
|
emit_signal("lobby_joined", data)
|
|
"lobby_left":
|
|
peer_id = null
|
|
emit_signal("lobby_left", data["id"])
|
|
|
|
"peer_data":
|
|
print(typeof(data), data)
|
|
if data.get("id") != null: emit_signal("peer_joined", [data])
|
|
else: emit_signal("peer_joined", data["data"])
|
|
"peer_left":
|
|
print("Peer Left: %s" % data)
|
|
emit_signal("peer_left", data)
|
|
|
|
"candidate":
|
|
print("Candidate received - Data: %s" % JSON.print(data["data"]))
|
|
emit_signal("candidate_received", data["data"])
|
|
"offer":
|
|
print("Offer received - Data: %s" % JSON.print(data["data"]))
|
|
emit_signal("offer_received", data["data"])
|
|
"answer":
|
|
print("Answer received - Data: %s" % JSON.print(data["data"]))
|
|
emit_signal("answer_received", data["data"])
|
|
"ping":
|
|
_send("pong")
|
|
_: print("Unhandled Message - Data: %s" % JSON.print(data))
|
|
|
|
func _load_display_name():
|
|
var _display_name = DEFAULT_DISPLAY_NAME
|
|
var display_name_file = File.new()
|
|
if display_name_file.open(DISPLAY_NAME_FILE, File.READ) == OK:
|
|
_display_name = display_name_file.get_as_text()
|
|
else:
|
|
print("Failed to open %s for reading display_name, creating default" % DISPLAY_NAME_FILE)
|
|
_store_display_name()
|
|
display_name_file.close()
|
|
return _display_name
|
|
|
|
func _store_display_name():
|
|
var display_name_file = File.new()
|
|
if display_name_file.open(DISPLAY_NAME_FILE, File.WRITE) == OK:
|
|
display_name_file.store_string(display_name)
|
|
else:
|
|
print("Failed to open %s for writing display_name" % DISPLAY_NAME_FILE)
|
|
display_name_file.close()
|
|
|
|
func _send(s: String):
|
|
return websocket.get_peer(1).put_packet(s.to_utf8())
|
|
|
|
func _send_json(data: Dictionary, type=null):
|
|
if type != null: data["type"] = type
|
|
_send("json:%s" % JSON.print(data))
|