src/server.py

"""Serves the Lilac server."""

import logging
import os
from typing import Any

from fastapi import APIRouter, FastAPI
from fastapi.responses import ORJSONResponse
from fastapi.routing import APIRoute
from fastapi.staticfiles import StaticFiles

from . import router_concept, router_data_loader, router_dataset, router_signal, router_tasks
from .config import CONFIG, data_path
from .router_utils import RouteErrorHandler
from .tasks import task_manager

DIST_PATH = os.path.abspath(os.path.join('web', 'blueprint', 'build'))

tags_metadata: list[dict[str, Any]] = [{
  'name': 'datasets',
  'description': 'API for querying a dataset.',
}, {
  'name': 'concepts',
  'description': 'API for managing concepts.',
}, {
  'name': 'data_loaders',
  'description': 'API for loading data.',
}, {
  'name': 'signals',
  'description': 'API for managing signals.',
}]


def custom_generate_unique_id(route: APIRoute) -> str:
  """Generate the name for the API endpoint."""
  return route.name


app = FastAPI(
  default_response_class=ORJSONResponse,
  generate_unique_id_function=custom_generate_unique_id,
  openapi_tags=tags_metadata)

v1_router = APIRouter(route_class=RouteErrorHandler)
v1_router.include_router(router_dataset.router, prefix='/datasets', tags=['datasets'])
v1_router.include_router(router_concept.router, prefix='/concepts', tags=['concepts'])
v1_router.include_router(router_data_loader.router, prefix='/data_loaders', tags=['data_loaders'])
v1_router.include_router(router_signal.router, prefix='/signals', tags=['signals'])
v1_router.include_router(router_tasks.router, prefix='/tasks', tags=['tasks'])

app.include_router(v1_router, prefix='/api/v1')

# Serve static files in production mode.
app.mount('/', StaticFiles(directory=os.path.join(DIST_PATH), html=True, check_dir=False))

print('data_path=', data_path(), CONFIG)
print('list:', os.listdir(data_path()))


@app.on_event('shutdown')
async def shutdown_event() -> None:
  """Kill the task manager when FastAPI shuts down."""
  await task_manager().stop()


class GetTasksFilter(logging.Filter):
  """Task filter for /tasks."""

  def filter(self, record: logging.LogRecord) -> bool:
    """Filters out /api/v1/tasks/ from the logs."""
    return record.getMessage().find('/api/v1/tasks/') == -1


logging.getLogger('uvicorn.access').addFilter(GetTasksFilter())