Generate iCalendar for Thunderbird, etc.

web_view.py

@@ -423,6 +423,16 @@ def trip_list() -> werkzeug.Response:
     return flask.redirect(flask.url_for("trip_future_list"))
 
 
+@app.route("/trip/ical")
+def trip_ical() -> werkzeug.Response:
+    """Return trip components in iCal format."""
+    trips = get_trip_list()
+    ical_data = agenda.trip.build_trip_ical(trips)
+    response = flask.Response(ical_data, mimetype="text/calendar")
+    response.headers["Content-Disposition"] = "inline; filename=trips.ics"
+    return response
+
+
 def calc_total_distance(trips: list[Trip]) -> float:
     """Total distance for trips."""
     total = 0.0