feat: add personal ics feeds for assigned tasks

app/routes/main.py

@@ -3,9 +3,11 @@ from __future__ import annotations
 from functools import lru_cache
 from pathlib import Path
 
-from flask import Blueprint, current_app, redirect, send_from_directory, url_for
+from flask import Blueprint, Response, current_app, redirect, send_from_directory, url_for
 from flask_login import current_user
 
+from ..models import User
+from ..services.calendar_feeds import build_calendar_feed
 
 bp = Blueprint("main", __name__)
 
@@ -39,6 +41,16 @@ def uploads(filename: str):
     return send_from_directory(current_app.config["UPLOAD_FOLDER"], filename)
 
 
+@bp.route("/calendar-feed/<token>.ics")
+def calendar_feed(token: str):
+    user = User.query.filter_by(calendar_feed_token=token).first_or_404()
+    body = build_calendar_feed(user, url_for("tasks.my_tasks", _external=True))
+    response = Response(body, content_type="text/calendar; charset=utf-8")
+    response.headers["Content-Disposition"] = 'inline; filename="putzliga.ics"'
+    response.headers["Cache-Control"] = "private, max-age=300"
+    return response
+
+
 @lru_cache(maxsize=64)
 def load_icon_svg(name: str, static_folder: str) -> str:
     path = Path(static_folder) / "icons" / f"{name}.svg"