Files
chat/chat/eventlog/projector.py
T
2026-04-26 11:42:49 -04:00

28 lines
666 B
Python

from __future__ import annotations
from collections.abc import Callable
from sqlite3 import Connection
from .log import Event, read_events
Handler = Callable[[Connection, Event], None]
_REGISTRY: dict[str, Handler] = {}
def on(kind: str):
def deco(fn: Handler) -> Handler:
_REGISTRY[kind] = fn
return fn
return deco
def project(conn: Connection, branch_id: int = 1) -> None:
for event in read_events(conn, branch_id=branch_id):
h = _REGISTRY.get(event.kind)
if h:
h(conn, event)
def apply_event(conn: Connection, event: Event) -> None:
h = _REGISTRY.get(event.kind)
if h:
h(conn, event)