cw-generator/scenes/multiplayer_connect.gd

extends Control

var server := "seba-geek.de"
var port := "3784"
var ws := WebSocketPeer.new()

var available_freqs = []
var mmb_self: MultiMorseBanner
var mmb_others: Dictionary[String, MultiMorseBanner]

class PlayerData:
	var num: int
	var color: Color
	var tone: int
	
	func _init(num, color, tone):
		self.num = num
		self.color = color
		self.tone = tone

var player_data := [
	PlayerData.new(0, Color(  0, 255,   0), 880),
	PlayerData.new(1, Color(255,   0,   0), 1200),
	PlayerData.new(2, Color(  0,   0, 255), 600),
	PlayerData.new(3, Color(255,   0, 255), 500),
]

func _ready() -> void:
	# FIXME: connection handling / reconnect
	# FIXME: status / error messages
	# FIXME: randomize default join frquency
	# FIXME: automatic refresh
	print("ws://%s:%s" % [server, port])
	ws.connect_to_url("ws://%s:%s" % [server, port])
	
func refresh_list() -> void:
	pass


func _process(_delta: float) -> void:
	ws.poll()
	var state := ws.get_ready_state()
	# print("moin ", state)
	while state == WebSocketPeer.STATE_OPEN and ws.get_available_packet_count():
		_handle_packet()
		
func _handle_packet() -> void:
	var data := ws.get_packet().get_string_from_utf8()
	print(data)
	var parsed: Dictionary = JSON.parse_string(data)
	if typeof(parsed) != TYPE_DICTIONARY or not parsed.has("type"):
		return
	print("parsed ", parsed)
		
	match parsed["type"]:
		"hello":
			# fetch frequency list on first join
			_on_refresh_button_pressed()
		"join":
			_join_freq(parsed["freq"], parsed["self_id"], parsed["other_players"])

		"freq-list":
			%FreqList.clear()
			for freq in parsed["freqs"]:
				var text = "%s MHz (%d present)" % [freq["freq"], freq["players"]]
				print("Adding ", text)
				var idx: int = %FreqList.add_item(text)
				%FreqList.set_item_metadata(idx, freq)
		
		"morse-state":
			var from_player: String = parsed["from_player"]
			if from_player not in mmb_others:
				print("Error: Got morse state from unknown player ", from_player)
				return
			mmb_others[from_player].set_morse_state(parsed["state"])

		"player-joined":
			var new_player: String = parsed["player"]
			if new_player in mmb_others:
				print("Error: got player join message, but player ", new_player, " is already present")
				return
			
			# find free player id
			var player_n := 1
			while true:
				var found := false
				for other in mmb_others.values():
					if other.num == player_n:
						print("New player, num ", player_n, " already taken")
						found = true
						break
				if not found:
					break
				player_n += 1
			
			make_player(player_n, new_player)

		"player-left":
			var player: String = parsed["player"]
			if player not in mmb_others:
				print("Error: player not part of freq ", player)
				return
			remove_player(parsed["player"])

		_:
			print("Unhandled message: ", parsed["type"])
			
			
func _join_freq(freq: String, player_id: String, other_players: Array):
	for child in %PlayerContainer.get_children():
		%PlayerContainer.remove_child(child)
		
	mmb_self = make_player(0, player_id)
	for n in range(other_players.size()):
		make_player(n + 1, other_players[n])
	
	%FreqLabel.text = "%s MHz" % freq
	%ConnectView.hide()
	%MorseView.show()

func _on_refresh_button_pressed() -> void:
	var refresh_cmd := {"cmd": "list", "type": "cw-generator"}
	var data := JSON.stringify(refresh_cmd) + "\n"
	ws.send_text(data)


func _on_create_button_pressed() -> void:
	var freq: String = "%.3f" % float(%FrequencyCreator.text)
	var refresh_cmd := {"cmd": "create", "type": "cw-generator", "freq": freq}
	var data := JSON.stringify(refresh_cmd) + "\n"
	ws.send_text(data)


func _on_freq_list_join(index: int, at_position: Vector2, mouse_button_index: int) -> void:
	var meta = %FreqList.get_item_metadata(index)
	var freq: String = meta["freq"]
	print("Yop ", index, " metadata ", freq)
	var join_cmd := {"cmd": "join", "freq": freq, "type": "cw-generator"}
	ws.send_text(JSON.stringify(join_cmd) + "\n")

func make_player(no: int, player_id: String):
	var pd: PlayerData
	if no < player_data.size():
		pd = player_data[no]
	else:
		pd = PlayerData.new(no, Color(randi_range(0, 255), randi_range(0, 255), randi_range(0, 255)), randi_range(440, 440 * 3))
	
	var mmb = MultiMorseBanner.new_banner(pd.num, pd.color, pd.tone)
	%PlayerContainer.add_child(mmb)
	mmb_others[player_id] = mmb
	return mmb

func remove_player(player_id: String):
	mmb_others[player_id].set_morse_state(false)
	%PlayerContainer.remove_child(mmb_others[player_id])
	mmb_others.erase(player_id)

func set_morse_state(state: bool):
	mmb_self.set_morse_state(state)
	send_data({"cmd": "morse-state", "state": state})

func send_data(data: Dictionary):
	var text := JSON.stringify(data) + "\n"
	ws.send_text(text)

func _on_morse_button_button_down() -> void:
	if not mmb_self:
		return
	set_morse_state(true)

func _on_morse_button_button_up() -> void:
	if not mmb_self:
		return
	set_morse_state(false)