microblog.pub/app/customization.py

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from dataclasses import dataclass
from pathlib import Path
from typing import TYPE_CHECKING
from typing import Any
from typing import Callable
from fastapi import APIRouter
from fastapi import Depends
from fastapi import Request
from loguru import logger
from starlette.responses import JSONResponse
if TYPE_CHECKING:
from app.ap_object import RemoteObject
_DATA_DIR = Path().parent.resolve() / "data"
_Handler = Callable[..., Any]
class HTMLPage:
def __init__(
self,
title: str,
html_file: str,
show_in_navbar: bool,
) -> None:
self.title = title
self.html_file = _DATA_DIR / html_file
self.show_in_navbar = show_in_navbar
class RawHandler:
def __init__(
self,
title: str,
handler: Any,
show_in_navbar: bool,
) -> None:
self.title = title
self.handler = handler
self.show_in_navbar = show_in_navbar
_CUSTOM_ROUTES: dict[str, HTMLPage | RawHandler] = {}
def register_html_page(
path: str,
*,
title: str,
html_file: str,
show_in_navbar: bool = True,
) -> None:
if path in _CUSTOM_ROUTES:
raise ValueError(f"{path} is already registered")
_CUSTOM_ROUTES[path] = HTMLPage(title, html_file, show_in_navbar)
def register_raw_handler(
path: str,
*,
title: str,
handler: _Handler,
show_in_navbar: bool = True,
) -> None:
if path in _CUSTOM_ROUTES:
raise ValueError(f"{path} is already registered")
_CUSTOM_ROUTES[path] = RawHandler(title, handler, show_in_navbar)
class ActivityPubResponse(JSONResponse):
media_type = "application/activity+json"
def _custom_page_handler(path: str, html_page: HTMLPage) -> Any:
from app import templates
from app.actor import LOCAL_ACTOR
from app.config import is_activitypub_requested
from app.database import AsyncSession
from app.database import get_db_session
async def _handler(
request: Request,
db_session: AsyncSession = Depends(get_db_session),
) -> templates.TemplateResponse | ActivityPubResponse:
if path == "/" and is_activitypub_requested(request):
return ActivityPubResponse(LOCAL_ACTOR.ap_actor)
return await templates.render_template(
db_session,
request,
"custom_page.html",
{
"page_content": html_page.html_file.read_text(),
"title": html_page.title,
},
)
return _handler
def get_custom_router() -> APIRouter | None:
if not _CUSTOM_ROUTES:
return None
router = APIRouter()
for path, handler in _CUSTOM_ROUTES.items():
if isinstance(handler, HTMLPage):
router.add_api_route(
path, _custom_page_handler(path, handler), methods=["GET"]
)
else:
router.add_api_route(path, handler.handler)
return router
@dataclass
class ObjectInfo:
# Is it a reply?
is_reply: bool
# Is it a reply to an outbox object
is_local_reply: bool
# Is the object mentioning the local actor
is_mention: bool
# Is it from someone the local actor is following
is_from_following: bool
# List of hashtags, e.g. #microblogpub
hashtags: list[str]
# @dev@microblog.pub
actor_handle: str
remote_object: "RemoteObject"
_StreamVisibilityCallback = Callable[[ObjectInfo], bool]
def default_stream_visibility_callback(object_info: ObjectInfo) -> bool:
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result = (
(not object_info.is_reply and object_info.is_from_following)
or object_info.is_mention
or object_info.is_local_reply
)
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logger.info(f"{object_info=}/{result=}")
return result