lekt8 1507d140b8 feat: CalDAV write-back — push local event create/update/delete to the remote (#800) (#1282) ...

* feat: CalDAV write-back — push local event create/update/delete to the remote (#800)

CalDAV sync was pull-only (src/caldav_sync.py), so events created, edited, or
deleted in Odysseus on a CalDAV-backed calendar only changed local SQLite and
never reached the server — they silently vanished on the next pull and never
appeared on the user's phone (iCloud, etc.).

This adds the missing write half:
- src/caldav_writeback.py builds the VEVENT, re-discovers the remote calendar by
  the same URL-hash the local id was derived from (the remote URL isn't stored),
  and PUTs/DELETEs the event by UID via the caldav lib. The pure pieces
  (build_event_ical, find_remote_calendar, push_event) take inputs by argument so
  they unit-test against a fake client with no network.
- create/update/delete event handlers (routes/calendar_routes.py) call it
  best-effort for caldav-sourced calendars only: the local DB stays the source of
  truth, a remote failure is logged, never fatal, and local calendars are untouched.

Tests: tests/test_caldav_writeback.py (9, pure logic incl. iCal serialization,
hash discovery, create/update/delete orchestration) and
tests/test_caldav_writeback_route.py (3, route-level: a caldav calendar pushes,
a local one does not, delete pushes a delete). 12 passed.

Note: write-back re-discovers the remote calendar per write (the URL isn't
persisted locally); a follow-up could cache it. Live-iCloud verification needs a
real account — flagging for a maintainer pass.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* test: drive #800 route regression without TestClient (fixes local hang)

Same fix as the document route test: the CalDAV write-back route regression used
Starlette TestClient (middleware app + threadpool) which hung in the maintainer's
environment. Rework it to call the async create/delete calendar handlers directly
— extracted from the router — with a minimal fake request, temp-SQLite-patched
SessionLocal, and writeback_event stubbed to record calls. Same coverage (a
caldav calendar pushes, a local one does not, delete pushes a delete), completes
in ~0.3s with no TestClient.

Verified the maintainer's exact batch:
  pytest tests/test_caldav_writeback.py tests/test_caldav_writeback_route.py -> 12 passed

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

2026-06-03 01:44:02 +09:00

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