152 lines
4.5 KiB
GDScript
152 lines
4.5 KiB
GDScript
extends Node
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"""
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This module is responsible for making a WebSocket connection to the signaller
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in order to enable establishish WebRTC P2P connections. Another module is
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expected to fully setup the peer connections.
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"""
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signal lobby_new(lobbiesList)
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signal lobby_delete(id)
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signal lobby_joined(id, peer_id)
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signal lobby_left(id)
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signal peer_joined(id)
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signal peer_left(id)
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signal candidate_received(data)
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signal offer_received(data)
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signal answer_received(data)
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signal client_id_set(client_id)
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signal peer_id_set(peer_id)
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signal websocket_connected
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signal websocket_disconnected
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onready var ws: WebSocketClient = WebSocketClient.new()
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onready var client_id = null
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onready var lobby_id = null
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onready var peer_id = null
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func _ready():
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var _result = ws.connect("data_received", self, "_parse_msg")
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_result = ws.connect("connection_established", self, "_connected")
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_result = ws.connect("connection_closed", self, "_closed")
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_result = ws.connect("connection_error", self, "_closed")
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_result = ws.connect("server_close_request", self, "_close_request")
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func close():
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ws.disconnect_from_host()
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func connect_to_websocket_signaller(url: String):
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print("WebSocket: %s" % ws)
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close()
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print("Attempting to connect to WebSocket signalling server at %s" % url)
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var result = ws.connect_to_url(url)
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if result != OK:
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print("FAILED TO CONNECT TO %s" % url)
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print("WebSocket Connect Result: %s" % result)
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func _closed(unknown):
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print("WebSocket closed: %s: " % unknown)
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emit_signal("websocket_disconnected")
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func _close_request(code: int, reason: String):
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print("Received WebSocket close request from signalling server - Code: %s, Reason: %s" % [code, reason])
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func _connected(protocol = ""):
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print("WebSocket signaller connected via protocol %s" % protocol)
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ws.get_peer(1).set_write_mode(WebSocketPeer.WRITE_MODE_TEXT)
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emit_signal("websocket_connected")
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_send("init")
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func _process(_delta: float):
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var status: int = ws.get_connection_status()
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ws.poll()
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if status == WebSocketClient.CONNECTION_CONNECTED || status == WebSocketClient.CONNECTION_CONNECTING:
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print("I'm polling! %s" % status)
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else:
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print("Not polling! %s" % status)
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func join_lobby(id: String):
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return _send("lobby_join:%s" % id)
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func create_lobby():
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return _send("lobby_create")
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func request_lobby_list():
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return _send("request_lobby_list")
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func request_peer_list():
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return _send("request_peer_list")
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func _send(s: String):
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return ws.get_peer(1).put_packet(s.to_utf8())
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func _parse_msg():
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var msg: String = ws.get_peer(1).get_packet().get_string_from_utf8()
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if msg.begins_with("json:"):
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var data = JSON.parse(msg.substr(5))
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if data.error == OK:
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handle_message(data.result)
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ws.get_peer(1).put_packet("".to_utf8())
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else:
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print("Unhandled message: %s" % msg)
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func handle_message(data: Dictionary):
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match data["type"]:
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"your_id":
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client_id = data["data"]
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emit_signal("client_id_set", client_id)
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"your_peer_id":
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peer_id = int(data["data"])
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emit_signal("peer_id_set", peer_id)
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"lobby_list": emit_signal("lobby_new", data["data"])
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"lobby_new": emit_signal("lobby_new", [{"id": data["id"], "name": data["name"]}])
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"lobby_delete": emit_signal("lobby_delete", data["id"])
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"lobby_joined":
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lobby_id = data["id"]
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peer_id = data["peerId"]
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emit_signal("lobby_joined", data["id"], data["peerId"])
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"lobby_left":
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lobby_id = null
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emit_signal("lobby_left", data["id"])
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"peer_joined": emit_signal("peer_joined", [{"id": data["id"], "name": data["name"], "peerId": data["peerId"]}])
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"peer_left": emit_signal("peer_left", data["id"])
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"candidate":
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print("Candidate received - Data: %s" % JSON.print(data["data"]))
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emit_signal("candidate_received", data["data"])
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"offer":
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print("Offer received - Data: %s" % JSON.print(data["data"]))
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emit_signal("offer_received", data["data"])
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"answer":
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print("Answer received - Data: %s" % JSON.print(data["data"]))
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emit_signal("answer_received", data["data"])
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_: print("Unhandled Message - Data: %s" % JSON.print(data))
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func send_candidate(peerId, mid, index, sdp) -> int:
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return _send("json:%s" % JSON.print({
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"type": "candidate",
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"data": {
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"peerId": peerId,
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"mid": mid,
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"index": index,
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"sdp": sdp
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}
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}))
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func send_offer(peerId, offer) -> int:
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return _send("json:%s" % JSON.print({ "type": "offer", "data": {"peerId": peerId, "offer": offer }}))
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func send_answer(peerId, answer) -> int:
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return _send("json:%s" % JSON.print({ "type": "answer", "data": {"peerId": peerId, "answer": answer }}))
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"""
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elif type.begins_with("S: "):
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emit_signal("lobby_sealed")
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return
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"""
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