Archipelago/WebHostLib/customserver.py

from __future__ import annotations

import functools
import logging
import os
import websockets
import asyncio
import socket
import threading
import time
import random
import pickle


from .models import *

from MultiServer import Context, server, auto_shutdown, ServerCommandProcessor, ClientMessageProcessor
from Utils import get_public_ipv4, get_public_ipv6, restricted_loads


class CustomClientMessageProcessor(ClientMessageProcessor):
    ctx: WebHostContext
    def _cmd_video(self, platform, user):
        """Set a link for your name in the WebHostLib tracker pointing to a video stream"""
        if platform.lower().startswith("t"):  # twitch
            self.ctx.video[self.client.team, self.client.slot] = "Twitch", user
            self.ctx.save()
            self.output(f"Registered Twitch Stream https://www.twitch.tv/{user}")
            return True
        elif platform.lower().startswith("y"):  # youtube
            self.ctx.video[self.client.team, self.client.slot] = "Youtube", user
            self.ctx.save()
            self.output(f"Registered Youtube Stream for {user}")
            return True
        return False


# inject
import MultiServer
MultiServer.client_message_processor = CustomClientMessageProcessor
del (MultiServer)


class DBCommandProcessor(ServerCommandProcessor):
    def output(self, text: str):
        logging.info(text)


class WebHostContext(Context):
    def __init__(self):
        super(WebHostContext, self).__init__("", 0, "", "", 1, 40, True, "enabled", "enabled", 0, 2)
        self.main_loop = asyncio.get_running_loop()
        self.video = {}
        self.tags = ["AP", "WebHost"]

    def listen_to_db_commands(self):
        cmdprocessor = DBCommandProcessor(self)

        while self.running:
            with db_session:
                commands = select(command for command in Command if command.room.id == self.room_id)
                if commands:
                    for command in commands:
                        self.main_loop.call_soon_threadsafe(cmdprocessor, command.commandtext)
                        command.delete()
                    commit()
            time.sleep(5)

    @db_session
    def load(self, room_id: int):
        self.room_id = room_id
        room = Room.get(id=room_id)
        if room.last_port:
            self.port = room.last_port
        else:
            self.port = get_random_port()

        return self._load(self._decompress(room.seed.multidata), True)

    @db_session
    def init_save(self, enabled: bool = True):
        self.saving = enabled
        if self.saving:
            savegame_data = Room.get(id=self.room_id).multisave
            if savegame_data:
                self.set_save(restricted_loads(Room.get(id=self.room_id).multisave))
            self._start_async_saving()
        threading.Thread(target=self.listen_to_db_commands, daemon=True).start()

    @db_session
    def _save(self, exit_save:bool = False) -> bool:
        room = Room.get(id=self.room_id)
        room.multisave = pickle.dumps(self.get_save())
        # saving only occurs on activity, so we can "abuse" this information to mark this as last_activity
        if not exit_save: # we don't want to count a shutdown as activity, which would restart the server again
            room.last_activity = datetime.utcnow()
        return True

    def get_save(self) -> dict:
        d = super(WebHostContext, self).get_save()
        d["video"] = [(tuple(playerslot), videodata) for playerslot, videodata in self.video.items()]
        return d

def get_random_port():
    return random.randint(49152, 65535)


def run_server_process(room_id, ponyconfig: dict):
    # establish DB connection for multidata and multisave
    db.bind(**ponyconfig)
    db.generate_mapping(check_tables=False)

    async def main():

        logging.basicConfig(format='[%(asctime)s] %(message)s',
                            level=logging.INFO,
                            handlers=[
                                logging.FileHandler(os.path.join(LOGS_FOLDER, f"{room_id}.txt"), 'a', 'utf-8-sig')])
        ctx = WebHostContext()
        ctx.load(room_id)
        ctx.init_save()

        try:
            ctx.server = websockets.serve(functools.partial(server, ctx=ctx), ctx.host, ctx.port, ping_timeout=None,
                                          ping_interval=None)

            await ctx.server
        except Exception:  # likely port in use - in windows this is OSError, but I didn't check the others
            ctx.server = websockets.serve(functools.partial(server, ctx=ctx), ctx.host, 0, ping_timeout=None,
                                          ping_interval=None)

            await ctx.server
        for wssocket in ctx.server.ws_server.sockets:
            socketname = wssocket.getsockname()
            if wssocket.family == socket.AF_INET6:
                logging.info(f'Hosting game at [{get_public_ipv6()}]:{socketname[1]}')
                with db_session:
                    room = Room.get(id=ctx.room_id)
                    room.last_port = socketname[1]
            elif wssocket.family == socket.AF_INET:
                logging.info(f'Hosting game at {get_public_ipv4()}:{socketname[1]}')
        with db_session:
            ctx.auto_shutdown = Room.get(id=room_id).timeout
        ctx.shutdown_task = asyncio.create_task(auto_shutdown(ctx, []))
        await ctx.shutdown_task
        logging.info("Shutting down")

    from .autolauncher import Locker
    with Locker(room_id):
        asyncio.run(main())


from WebHostLib import LOGS_FOLDER