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# Hurry Curry! - a game about cooking
# Copyright 2024 tpart
# Copyright 2024 nokoe
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, version 3 of the License only.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
#
extends Node
signal update_loading(status: bool)
signal update_server_list(list: Array)
enum Registry {
MDNS = 0,
GLOBAL = 1,
}
const MDNS_URL: String = "http://127.0.0.1:27033/v1/list"
const HEADERS: Array[String] = [
"Accept: application/json",
"User-Agent: Hurry Curry! %s" % Global.VERSION
]
var current_list: Array[Array] = [[], []]
var loading := false
var mdns := HTTPRequest.new()
var reg := HTTPRequest.new()
var thread: Thread
var pid: int = -1
var mdns_timer := Timer.new()
var reg_timer := Timer.new()
# after 30 minutes we stop fetching results to reduce server load
var timeout := Timer.new()
func _ready() -> void:
add_child(mdns)
add_child(reg)
mdns_timer.wait_time = 5.
mdns_timer.one_shot = false
mdns_timer.timeout.connect(fetch_server_list.bind(Registry.MDNS))
add_child(mdns_timer)
reg_timer.wait_time = 60.
reg_timer.one_shot = false
reg_timer.timeout.connect(fetch_server_list.bind(Registry.GLOBAL))
add_child(reg_timer)
timeout.wait_time = 60. * 30.
timeout.timeout.connect(func():
stop()
)
add_child(timeout)
mdns.request_completed.connect(_on_request_completed.bind(Registry.MDNS))
reg.request_completed.connect(_on_request_completed.bind(Registry.GLOBAL))
if Global.get_setting("online.use_discovery"):
thread = Thread.new()
thread.start(func():
# SAFETY: reading/writing arrays/dictionaries is allowed as long as
# the size is not changed.
# cf.: https://docs.godotengine.org/en/4.3/tutorials/performance/thread_safe_apis.html#gdscript-arrays-dictionaries
var res = OS.create_process(get_discovery_path(), [], true)
# SAFETY: since this is not read until the thread stops, this should
# probably be safe without synchronisation :)
pid = res
)
static func get_discovery_path() -> String:
var path: String = Global.get_setting("online.discovery_binary")
if path != "":
return path
else:
return "hurrycurry-discover"
func fetch_server_list(registry: Registry) -> void:
match registry:
Registry.MDNS:
mdns.request(MDNS_URL, HEADERS)
Registry.GLOBAL:
reg.request(Global.get_setting("online.registry_url") + "/v1/list", HEADERS)
loading = true
update_loading.emit(true)
func _on_request_completed(result: int, _response_code: int, _headers: PackedStringArray, body: PackedByteArray, registry: Registry):
loading = false
update_loading.emit(false)
if result != 0:
push_warning("Fetching server list failed with code %d" % result)
return
var json = JSON.parse_string(body.get_string_from_utf8())
if json == null:
push_error("Server list response invalid")
return
current_list[registry] = json
update_server_list.emit(current_list)
func start() -> void:
timeout.stop()
timeout.start()
if Global.get_setting("online.use_discovery"):
mdns_timer.start()
fetch_server_list(Registry.MDNS)
if Global.get_setting("online.use_registry"):
reg_timer.start()
fetch_server_list(Registry.GLOBAL)
func stop() -> void:
timeout.stop()
mdns_timer.stop()
reg_timer.stop()
func one_shot() -> void:
start()
stop()
func _exit_tree():
if thread != null: thread.wait_to_finish()
if pid != -1:
OS.kill(pid)
var x = null
OS.kill(x) # TODO this somehow prevents a crash on exit; but is invalid according to docs
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