Use FastAPI instead of Django

app/routers/api.py

@@ -0,0 +1,61 @@
+from __future__ import annotations
+
+import datetime  # noqa: TCH003
+from urllib.parse import unquote
+
+from fastapi import APIRouter
+from pydantic import BaseModel
+from reader import ExceptionInfo, Feed, FeedNotFoundError
+
+from app.dependencies import CommonReader  # noqa: TCH001
+from app.validators import uri_validator
+
+api_router = APIRouter(
+    prefix="/api/v1",
+    tags=["Feeds"],
+    responses={404: {"description": "Not found"}},
+)
+
+
+class FeedOut(BaseModel):
+    """The feed we return to the user."""
+
+    url: str
+    updated: datetime.datetime | None = None
+    title: str | None = None
+    link: str | None = None
+    author: str | None = None
+    subtitle: str | None = None
+    version: str | None = None
+    user_title: str | None = None
+    added: datetime.datetime | None = None
+    last_updated: datetime.datetime | None = None
+    last_exception: ExceptionInfo | None = None
+    updates_enabled: bool = True
+
+
+@api_router.get("/feeds", summary="Get all the feeds in the reader.", tags=["Feeds"])
+async def api_feeds(reader: CommonReader) -> list[Feed]:
+    """Return all the feeds in the reader."""
+    return list(reader.get_feeds())
+
+
+@api_router.get(
+    path="/feed/{feed_url:path}",
+    summary="Get a feed from the reader.",
+    tags=["Feeds"],
+    response_model=FeedOut | dict[str, str],
+    response_model_exclude_unset=True,
+)
+async def api_feed(feed_url: str, reader: CommonReader) -> Feed | dict[str, str]:
+    """Return a feed from the reader."""
+    feed_url = unquote(feed_url)
+
+    if not uri_validator(feed_url):
+        return {"message": "Invalid URL."}
+
+    try:
+        feed: Feed = reader.get_feed(feed_url)
+    except FeedNotFoundError as e:
+        return {"message": str(e)}
+    return feed