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Bot-Man-Toe
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Create MVP PyServer

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Bram van den Heuvel 2026-06-05 18:16:23 +02:00
parent 99e5cafa89
commit 815f2d0d35
8 changed files with 262 additions and 22 deletions
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1
README.md
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@ -12,3 +12,4 @@ are programs or browsers that mediate matches between servers.
- The discovery contract is documented in `spec/README.md`.
- Python client helpers live under `pyclient/`.
- Python server helpers live under `pyserver/`.

89
main.py Normal file
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@ -0,0 +1,89 @@
"""
This module enables a user to host a server that is able to play games.
"""
import random
from pyserver import PyServer
from pyclient import PyClient
from pyclient.games.tic_tac_toe import TicTacToe
def main():
player = PyServer(
# Customize this to whatever you'd like to call your player
name="My super smart robot player",
# Custom information that you can use to tell people about this player
profile={},
# Unless you know what you're doing, don't touch this.
import_name=__name__,
)
player.add_tic_tac_toe({}, play_tic_tac_toe)
player.start(port=5001)
return 0
def play_tic_tac_toe(payload):
"""
Play a game of tic-tac-toe.
You receive a payload that looks like this:
{
"1": "X", "2": "", "3": "O",
"4": "X", "5": "O", "6": "",
"7": "", "8": "", "9": "",
"your_token": "X"
}
And you're expected to return a response of which field you'd like to
place your piece in. For example, if you wish to place your token in
field 7, your response should look like this:
{ "move": 7 }
The board is arranged as follows:
1 | 2 | 3
---+---+---
4 | 5 | 6
---+---+---
7 | 8 | 9
"""
# Try printing the payload to see what it looks like!
print(payload)
options = [ 1, 2, 3, 4, 5, 6, 7, 8, 9, ]
# 1. Try filtering out the impossible moves!
# If an X or O was already placed at a field, remove it from the options
#
# 2. Try finding two in a row! If possible, you can try to place the third
# item on the board and get 3 in a row.
#
# 3. Perhaps you can block the opponent from getting 3 in a row?
#
# Now, pick any of the remaining options.
# This is just a simple implementation. Naturally, you're welcome to try
# your own logic.
return { "move": random.choice(options) }
if __name__ == "__main__":
raise SystemExit(main())
c = PyClient([
"http://localhost:5001",
"http://localhost:5002"
], debug=True)
out = c.play_game("/tic-tac-toe", TicTacToe)

5
pyclient/__init__.py
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@ -10,7 +10,7 @@ from .poll import ServerAgent
class PyClient:
"""Host games between discovered server agents."""
def __init__(self, hosts: List[str]) -> None:
def __init__(self, hosts: List[str], debug : bool = False) -> None:
"""
Create a PyClient.
@ -19,6 +19,7 @@ class PyClient:
:raises ValueError: If no reachable servers are provided.
"""
self.agents: List[ServerAgent] = []
self.debug = debug
self.hosts: List[str] = []
for host in hosts:
@ -34,7 +35,7 @@ class PyClient:
def __discover_host(self, url: str) -> Optional[ServerAgent]:
try:
return ServerAgent.from_url(url)
return ServerAgent.from_url(url, debug=self.debug)
except (requests.exceptions.RequestException, ValueError):
return None

31
pyclient/games/tic_tac_toe.py
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@ -50,7 +50,7 @@ class TicTacToe:
raise KeyError(
f"Index to write to should be 1-9, not {index}"
)
elif current_value != Field.empty:
elif current_value != str(Field.empty):
raise ValueError(
f"Field should be empty, not {current_value}"
)
@ -170,7 +170,7 @@ class TicTacToe:
)
def action_name(self):
return "tic-tac-toe"
return "/tic-tac-toe"
def count_o(self) -> int:
"""
@ -234,20 +234,21 @@ class TicTacToe:
# Extract field to place symbol at
move = 1
if isinstance(payload, dict):
move = payload.get("move", 1)
move = payload.get("move", None)
if not isinstance(move, int):
move = 1
move = None
else:
move = move if 1 <= move <= 9 else None
move = min(9, max(1, move))
try:
out = self.__write(move, symbol)
except ValueError:
# Invalid move! We'll try any other move.
pass
else:
return out
if move is not None:
try:
out = self.__write(move, symbol)
except ValueError:
# Invalid move! We'll try any other move.
pass
else:
return out
# The player chose an invalid move.
return self.move_default()
@ -292,13 +293,13 @@ class TicTacToe:
d = self.to_dict()
for player, symbol in [ ( 1, Field.X ), ( 2, Field.O ) ]:
for player, symbol in [ ( 1, str(Field.X) ), ( 2, str(Field.O) ) ]:
for win_line in win_lines:
if all(d[str(w)] == symbol for w in win_line):
return player
else:
# Check for draw
if all(item != Field.empty for item in d.values()):
if all(item != "" for item in d.values()):
return 0
return None

16
pyclient/poll.py
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@ -62,7 +62,7 @@ def _poll_request(
class ServerAgent:
"""Representation of a server that can host one or more games."""
def __init__(self, url: str, name: str, games: Dict[str, Dict[str, Any]]) -> None:
def __init__(self, url: str, name: str, games: Dict[str, Dict[str, Any]], debug : bool = False) -> None:
"""
Create a server representation.
@ -73,15 +73,17 @@ class ServerAgent:
:param games: Games the server is willing to play.
:type games: Dict[str, Dict[str, Any]]
"""
self.url = url.strip("/")
self.name = name
self.debug = debug
self.games = games
self.name = name
self.url = url.strip("/")
@classmethod
def from_url(
cls,
url: str,
timeout: Optional[Union[float, Tuple[float, float]]] = 10.0,
debug : bool = False
) -> "ServerAgent":
"""
Create a server agent by polling its discovery endpoint.
@ -130,7 +132,7 @@ class ServerAgent:
if isinstance(profile, dict):
games[str(game_name)] = profile
return cls(url=url, name=name, games=games)
return cls(url=url, name=name, games=games, debug=debug)
def poll(self, game: str, payload: Dict[str, Any], timeout: float = 1.0) -> Optional[Dict[str, Any]]:
"""
@ -148,7 +150,11 @@ class ServerAgent:
"""
url = f"{self.url.rstrip('/')}/{game.lstrip('/')}"
status, content = _poll_request(url, payload, timeout, timeout)
status, content = _poll_request(url, payload, timeout, 3.0)
if self.debug:
print(f"[DBG] Agent `{self.name}` returned:")
print(( status, content ))
if status != "ok":
return None

5
pyserver/__init__.py Normal file
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@ -0,0 +1,5 @@
"""Public server entry points."""
from .server import PyServer
__all__ = ["PyServer"]

129
pyserver/server.py Normal file
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@ -0,0 +1,129 @@
"""Stateless Flask server helpers for Bot-Man-Toe games."""
from __future__ import annotations
from collections.abc import Callable, Mapping
from typing import Any, Optional
from flask import Flask, jsonify, request
GameHandler = Callable[[Any], Any]
class PyServer:
"""A tiny stateless Flask app that serves discovery and game routes."""
def __init__(self, name: str, profile: Optional[Mapping[str, Any]] = None, import_name: str = __name__) -> None:
"""
Create a PyServer.
:param name: Preferred display name for discovery.
:param profile: Additional root-level discovery metadata.
:param import_name: Flask import name.
"""
self.name = name
self.profile = dict(profile or {})
if "name" in self.profile:
raise ValueError("Root profile metadata must not define 'name'.")
if "games" in self.profile:
raise ValueError("Root profile metadata must not define 'games'.")
self.app = Flask(import_name)
self._games: dict[str, dict[str, Any]] = {}
self._registered_routes: set[str] = set()
self._register_root()
def _register_root(self) -> None:
def discovery() -> Any:
payload = {"name": self.name, **self.profile, "games": dict(self._games)}
return jsonify(payload)
self.app.add_url_rule("/", endpoint="botman_discovery", view_func=discovery, methods=["GET"])
@staticmethod
def _normalize_segment(segment: str) -> str:
normalized = segment.strip("/")
if not normalized:
raise ValueError("Route segments must not be empty.")
return normalized
def _compose_route(self, game_name: str, action_name: str) -> str:
normalized_game = self._normalize_segment(game_name)
normalized_action = action_name.strip("/")
return f"/{normalized_game}" if not normalized_action else f"/{normalized_game}/{normalized_action}"
def _register_action(self, route: str, handler: GameHandler) -> None:
if route in self._registered_routes:
raise ValueError(f"Route already registered: {route}")
endpoint = f"botman_{len(self._registered_routes)}"
def view() -> Any:
payload = request.get_json(silent=True)
return jsonify(handler(payload))
self.app.add_url_rule(route, endpoint=endpoint, view_func=view, methods=["GET"])
self._registered_routes.add(route)
def add_game(
self,
game_name: str,
custom_profile: Mapping[str, Any],
actions: Mapping[str, GameHandler],
required_actions: Optional[tuple[str, ...]] = None,
) -> None:
"""
Register a stateless game with one or more action routes.
:param game_name: Base route name for the game.
:param custom_profile: Game-specific discovery metadata.
:param actions: Mapping of action subpaths to handlers.
:param required_actions: Optional completeness check. If provided, all
required action names must exist in ``actions`` and map to callables.
"""
if not isinstance(custom_profile, Mapping):
raise TypeError("custom_profile must be a mapping.")
if not isinstance(actions, Mapping) or not actions:
raise ValueError("actions must be a non-empty mapping.")
normalized_profile = dict(custom_profile)
if required_actions is not None:
missing_actions = [action_name for action_name in required_actions if action_name not in actions]
if missing_actions:
raise ValueError(f"Missing required action handlers: {', '.join(sorted(missing_actions))}")
prepared_routes: list[tuple[str, GameHandler]] = []
for action_name, handler in actions.items():
if not isinstance(action_name, str):
raise TypeError("Action names must be strings.")
if handler is None or not callable(handler):
raise TypeError(f"Action handler for '{action_name}' must be callable.")
prepared_routes.append((self._compose_route(game_name, action_name), handler))
normalized_routes = [route for route, _ in prepared_routes]
if len(set(normalized_routes)) != len(normalized_routes):
raise ValueError("Action routes must be unique after normalization.")
duplicate_routes = [route for route, _ in prepared_routes if route in self._registered_routes or route in self._games]
if duplicate_routes:
raise ValueError(f"Route already registered: {duplicate_routes[0]}")
for route, handler in prepared_routes:
self._register_action(route, handler)
self._games[route] = dict(normalized_profile)
def add_tic_tac_toe(self, custom_profile: Mapping[str, Any], on_move: GameHandler) -> None:
"""
Convenience registration for tic-tac-toe.
The game is exposed at ``/tic-tac-toe``.
"""
self.add_game("tic-tac-toe", custom_profile, {"": on_move})
def start(self, host: str = "127.0.0.1", port: int = 5000, debug: bool = False, **kwargs: Any) -> None:
"""Start the Flask development server."""
self.app.run(host=host, port=port, debug=debug, **kwargs)

8
requirements.txt
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@ -1,5 +1,13 @@
blinker==1.9.0
certifi==2026.5.20
charset-normalizer==3.4.7
click==8.4.1
colorama==0.4.6
Flask==3.1.3
idna==3.18
itsdangerous==2.2.0
Jinja2==3.1.6
MarkupSafe==3.0.3
requests==2.34.2
urllib3==2.7.0
Werkzeug==3.1.8