gdvrpn/SocketClient.gd

extends Node

signal connected(s:StreamPeerTCP)
signal data(data:Array)
signal disconnected
signal error

@onready var _stream: StreamPeerTCP = StreamPeerTCP.new()

func _ready() -> void:
	self.connect_to_host("127.0.0.1",3883)

func _process(delta: float) -> void:
	var old_status = _stream.get_status()
	_stream.poll()
	var new_status = _stream.get_status()
	if old_status != new_status:
		match new_status:
			_stream.STATUS_NONE:
				emit_signal("disconnected")
			_stream.STATUS_CONNECTING:
				print("Connecting.")
			_stream.STATUS_CONNECTED:
				print("Connected.")
				emit_signal("connected",_stream.poll()
)
			_stream.STATUS_ERROR:
				print("Error with socket stream.")
				emit_signal("error")

	if new_status == _stream.STATUS_CONNECTED:
		var available_bytes: int = _stream.get_available_bytes()
		if available_bytes > 0:
			#print("available bytes: ", available_bytes)
			var res = _stream.get_partial_data(available_bytes)
			if res[0] != OK:
				emit_signal("error")
			else:
				emit_signal("data", res[1])

func connect_to_host(host: String, port: int) -> void:
	print("Connecting to %s:%d" % [host, port])
	if _stream.connect_to_host(host, port) != OK:
		print("Error connecting to host.")
		emit_signal("error")

func send(data: PackedByteArray) -> bool:
	if _stream.get_status() != _stream.STATUS_CONNECTED:
		print("Error: Stream is not currently connected.")
		return false
	var error: int = _stream.put_data(data)
	if error != OK:
		print("Error writing to stream: ", error)
		return false
	return true
	

func _on_data(data : Array):
	var bytes = PackedByteArray(data)
	var as_cookie = bytes.get_string_from_ascii()
	
	# Cookie Hack!
	if as_cookie.begins_with("vrpn: ver."):
		#print("VRPN magic cookie '{0}'".format([as_cookie]))
		# kaboom we just send back the same cookie :) 
		self.send(bytes)
	else:
		# non-cookie messages
		var header_bytes = bytes.slice(0,24)
		var header_i32 = header_bytes.to_int32_array()
		#var vrpn_h = VRPN_Header.new(header_bytes)
		#print(header_i32)
		#print(header_bytes)
		print(bytes)
			
func _on_connected(s : StreamPeerTCP):
	print("Connected to",s.get_connected_host()) # Replace with function body.
	
func _on_disconnected():
	print("Disconnected") # Replace with function body.

func _on_error():
	print("Error") # Replace with function body.