Jean-Luc Makiola
829a27da82
Phase 2 of docs/OWN-STORE.md, the engine half. RecurrenceExpander turns a stored rule set into its occurrences at read time — no materialised instances table, so none of its staleness bugs exist. Each occurrence is returned as its RECURRENCE-ID anchor, which is what the seam now addresses occurrences by. Expansion is bounded two ways: the window end, and a hard occurrence ceiling. The iterator is fast-forwarded to the window start first, so a FREQ=MINUTELY series anchored years back doesn't scan millions of instances to emit one. Three things lib-recur 0.12.2 forced. RecurrenceSet.iterator injects the start itself, so DTSTART is in the set for free and EXDATE can remove it (RFC 5545 §3.8.5.3). Its window end is exclusive. And a floating UNTIL against a zoned start throws, so the UNTIL's local fields are re-read in the series zone — the vendored provider worked around the same thing via TimeZone.getDefault(), which isn't deterministic. Malformed RRULE/RDATE/EXDATE values are dropped, not thrown: a task with an unparseable stored rule still has to appear. 38 tests. Multi-occurrence expansion has no provider behaviour to compare against, so the reference is RFC 5545 directly — daily/weekly/monthly/ yearly, COUNT, UNTIL, a Europe/Berlin DST boundary, all-day series pinned to UTC midnight, RDATE, EXDATE, and an unbounded rule hitting both bounds.
Agendula
A modern Material 3 Expressive task app for Android.
Keeps your tasks on your device, or on top of a tasks provider you already use.
Open standards, no account required.
Agendula is the task-list sibling to Calendula.
Where Calendula is a pure front-end over Android's CalendarContract, Agendula
speaks the dmfs TaskContract — the same shape DAVx5 (and SmoothSync,
DecSync, …) syncs your CalDAV VTODO tasks into.
The name rhymes with its sibling on purpose: Agendula is agenda — Latin for
“things to be done” — given Calendula's -ula ending. Calendula keeps your days;
Agendula keeps your to-dos. (A Calendula flower head is botanically a cluster of
many small florets — so the two apps are florets of one bloom.)
Where your tasks live — your choice
| Where | Sync | Needs | |
|---|---|---|---|
| On your device (default) | Agendula's own task store, bundled in the app | none yet — sync of our own is planned | nothing. No account, no permissions, no other app |
| In a provider you already use | OpenTasks or tasks.org | whatever syncs it for you — DAVx5 and friends | that app installed, and its read/write permission |
Agendula carries its own copy of the Apache-2.0 dmfs task provider, under its own name — so it coexists with OpenTasks rather than replacing it, and installing one never breaks the other. It is a fork of a proven schema, not a database written from scratch, which is why every CalDAV engine already understands it.
Your tasks are exportable as standard iCalendar .ics files at any time, because
data you can't take with you isn't really yours.
Status: backend complete, UI catching up. Storage, provider, reads and writes, smart-list filtering, a self-scheduled reminder engine, and export are built and unit-tested. The Material 3 Expressive screens are being built on top, one at a time — the storage-mode picker and export screen are not there yet. See
docs/ROADMAP.mdfor status,docs/ARCHITECTURE.mdfor how it's built, anddocs/STORAGE-AND-SYNC.mdfor why storage works the way it does.
Sync sources (by design)
In provider mode Agendula works with anything that writes to that provider — DAVx5 (CalDAV), SmoothSync, CalDAV-Sync, DecSync CC, or any Android sync adapter — because it builds on the provider, not on any one sync app. Google Tasks / Microsoft To Do are out of scope by design (proprietary; they would mean owning a sync stack). Open standards — CalDAV / iCalendar / DecSync — are the lane.
Translations
Agendula ships in English so far, and would like not to. Translations are managed on a self-hosted Weblate, and partial ones are fine — an untranslated string simply falls back to English.
No coding needed: register on the Weblate server, pick (or request) a language, and translate the strings in your browser. You can also reach this link in the app from the top of Settings → App language.
License
MIT — see LICENSE.