init commit with base ECS and Network System

kennel/config.py

@@ -5,8 +5,8 @@ load_dotenv()
 
 
 class Config:
-    WORLD_WIDTH = int(os.getenv("WORLD_WIDTH", 1000))
-    WORLD_HEIGHT = int(os.getenv("WORLD_HEIGHT", 1000))
+    SIMULATION_WIDTH = int(os.getenv("SIMULATION_WIDTH", 1000))
+    SIMULATION_HEIGHT = int(os.getenv("SIMULATION_HEIGHT", 1000))
 
     HATECOMPUTERS_ENDPOINT = os.getenv(
         "HATECOMPUTERS_ENDPOINT", "https://hatecomputers.club"

kennel/engine/components/controllable.py

@@ -10,5 +10,4 @@ class Controllable(Component):
         return f"Controllable(by={self.by})"
 
     def dict(self) -> dict:
-        # don't serialize who owns this
-        return {}
+        return {"by": self.by}

kennel/engine/entities/entity.py

@@ -23,13 +23,6 @@ class Entity:
     def add_component(self, component: Component) -> None:
         self.components[component.component_type] = component
 
-    def to_dict(self) -> dict:
-        return {
-            "entity_type": self.entity_type,
-            "id": self.id,
-            "components": {k: v.dict() for k, v in self.components.items()},
-        }
-
 
 class EntityManager:
     def __init__(self):
@@ -65,6 +58,3 @@ class EntityManager:
 
     def get_entity(self, entity_id: str) -> Optional[Entity]:
         return self.entities.get(entity_id)
-
-    def to_dict(self) -> dict:
-        return {k: v.to_dict() for k, v in self.entities.items()}

kennel/engine/systems/network.py

@@ -6,7 +6,6 @@ import asyncio
 
 
 class EventType(str, Enum):
-    INITIAL_STATE = "INITIAL_STATE"
     ENTITY_BORN = "ENTITY_BORN"
     ENTITY_POSITION_UPDATE = "ENTITY_POSITION_UPDATE"
     ENTITY_DEATH = "ENTITY_DEATH"

kennel/engine/systems/system.py

@@ -5,7 +5,6 @@ from abc import abstractmethod
 
 class SystemType(str, Enum):
     NETWORK = "NETWORK"
-    WORLD = "WORLD"
 
 
 class System:

kennel/engine/systems/world.py

@@ -1,24 +0,0 @@
-from kennel.engine.systems.system import System, SystemType
-from kennel.engine.entities.entity import EntityManager
-from kennel.engine.components.component import ComponentType
-from kennel.app import logger
-
-
-class WorldSystem(System):
-    def __init__(self, width: int, height: int):
-        super().__init__(SystemType.WORLD)
-        self.width = width
-        self.height = height
-
-    async def update(self, entity_manager: EntityManager, delta_time: float):
-        entities = entity_manager.get_entities_with_component(ComponentType.POSITION)
-        for entity in entities:
-            position = entity.get_component(ComponentType.POSITION)
-            if position is None:
-                logger.error(f"Entity {entity} has no position component")
-                continue
-
-            position.x = max(0, min(self.width, position.x))
-            position.y = max(0, min(self.height, position.y))
-
-            entity.add_component(position)

kennel/kennel.py

@@ -10,7 +10,6 @@ from kennel.engine.systems.network import (
     Event,
     EventType,
 )
-from kennel.engine.systems.world import WorldSystem
 from kennel.config import config
 from .app import logger
 from typing import List
@@ -60,6 +59,9 @@ class KennelClientEventTransformer(ClientEventTransformer):
                 logger.error(f"Entity {id} does not exist")
                 return event
             for component_type in entity.components:
+                if component_type == ComponentType.CONTROLLABLE:
+                    # Do not send controllable components to clients
+                    continue
                 component = entity.get_component(component_type)
                 if component is not None:
                     event.data[component_type] = component.dict()
@@ -67,9 +69,8 @@ class KennelClientEventTransformer(ClientEventTransformer):
         return event
 
 
-system_manager.add_system(WorldSystem(config.WORLD_WIDTH, config.WORLD_HEIGHT))
 system_manager.add_system(
-    NetworkSystem(EventProcessor(), KennelClientEventTransformer()),
+    NetworkSystem(EventProcessor(), KennelClientEventTransformer())
 )
 
 kennel = Game(entity_manager, system_manager, config.MIN_TIME_STEP)

kennel/main.py

@@ -12,16 +12,16 @@ from fastapi.staticfiles import StaticFiles
 from kennel.engine.systems.system import SystemType
 from kennel.engine.systems.network import Event, Publishable, EventType
 from typing import Annotated, Optional
-from kennel.kennel import (
+from .kennel import (
     kennel,
     system_manager,
     entity_manager,
     create_session_controllable_entities,
 )
-from kennel.app import app, templates, logger
-from kennel.kennelcats import KennelCatService
-from kennel.middleware import logger_middleware
-from kennel.config import config
+from .app import app, templates, logger
+from .kennelcats import KennelCatService
+from .middleware import logger_middleware
+from .config import config
 import asyncio
 import uuid
 
@@ -83,19 +83,8 @@ async def websocket_endpoint(
     session: Annotated[str, Depends(get_cookie_or_token)],
 ):
     await websocket.accept()
-    logger.info(f"Websocket connection established for session {session}")
-
-    await websocket.send_json(
-        {
-            "event_type": EventType.INITIAL_STATE,
-            "data": {
-                "world": {"width": config.WORLD_WIDTH, "height": config.WORLD_HEIGHT},
-                "entities": kennel.entity_manager.to_dict(),
-            },
-        }
-    )
-
     session_entities = create_session_controllable_entities(session)
+    logger.info(f"Websocket connection established for session {session}")
     try:
         network_system = system_manager.get_system(SystemType.NETWORK)
         if network_system is None:
@@ -108,8 +97,9 @@ async def websocket_endpoint(
 
         network_system.add_client(session, WebSocketClient(websocket))
         while True:
-            message = await websocket.receive_json()
-            network_system.client_event(session, Event.from_dict(message))
+            network_system.client_event(
+                session, Event.from_dict(await websocket.receive_json())
+            )
     except Exception as e:
         logger.error(f"WebSocket exception {e}")
     finally:

templates/index.html

@@ -5,10 +5,10 @@
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <meta http-equiv="X-UA-Compatible" content="ie=edge">
     <title>Kennel Club</title>
-    <script src='https://unpkg.com/panzoom@9.4.0/dist/panzoom.min.js'></script>
   </head>
   <body>
     <div id="kennel-window"></div>
     <script src="{{ url_for('static', path='/index.js') }}"></script>
   </body>
 </html>
+