mirror of
https://github.com/kuhyx/diet-guard.git
synced 2026-11-11 12:27:42 +01:00
Krzysztof kuhy Rudnicki
24dbffc432
Without this the schedule would be device-local, which is the failure this
whole feature has to avoid: the phone sets five meals, the PC still derives
four, and the PC's gate nags for a 12:00 checkpoint the phone never offered
and can never satisfy. So sync lands before either edit surface, not after.
The history rides the existing `budget` CRDT record as one
`sched:<YYYY-MM-DD>` field per entry, exactly like the budget's own `hist:`
fields. merge_record is per-field LWW over the *union* of field names and both
devices push the merged record, so a device that predates the feature relays
the fields untouched -- no coordinated release. There is a test for precisely
that: merging our push with a budget-only peer keeps both schedule entries.
Verified the two languages agree on the wire, not just in their own suites --
Python and Dart both emit
{"sched:1970-01-01":{"f":8,"l":20,"n":4},"sched:2026-08-16":{"f":8,"l":20,"n":5}}
The Hlc is derived from the *parsed* timestamp on both sides, which matters
because the epoch fallback formats differently in each language
(1970-01-01T00:00:00+00:00 vs ...000Z) and a string comparison would diverge.
Two guards worth naming:
- A device with no history contributes no `sched:` fields at all, so an unset
default can never outrank a peer's real schedule; and an empty merge result
is never written back, so a pre-feature peer cannot erase a real history.
- Dart's `_syncBudget` synthesises a local record when the schedule has been
edited but the budget never has -- `budgetToLog(null, ...)` returns an empty
Log and would otherwise drop the schedule fields too. Its budget value
carries an epoch stamp, so it loses every LWW race against a real edit.
sync_merge/_schedule.py and sync_merge_schedule.dart are separate modules
rather than additions to the budget adapters, which were at 186 and 170 lines
against the 250 cap. Each declares its own record-id constant so the Dart
pair does not import each other.
772 Python tests at 100% branch coverage, 619 Dart.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0159b4E5hh512jYUeaJVNxfM
80 lines
2.4 KiB
Python
80 lines
2.4 KiB
Python
"""Entry <-> ``crdt_sync.Record`` adapters for diet_guard's cross-device sync.
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diet_guard's own on-disk ``food_log.json`` format is unchanged (a
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:class:`~diet_guard._state.DayLog`: date string -> list of entry dicts) --
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only the GitHub-synced wire format and the cross-device merge algorithm go
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through ``crdt_sync``'s ``Record``/``Log``/``Hlc`` primitives, the same ones
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every other kuhy app that syncs this way uses (see ``~/crdt-sync``).
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Split into three submodules for file size, along the same seams the tests
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already use:
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* :mod:`._daylog` -- the food log itself, including the legacy-format fallback
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* :mod:`._budget` -- the budget record and its ``hist:`` history fields
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* :mod:`._banks` -- the derived and curated halves of the food bank
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Everything public is re-exported here, so ``from diet_guard.sync_merge import
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parse_remote_log`` reaches the same object the flat module exposed. (The
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``merge_logs`` these adapters feed is ``crdt_sync``'s, imported directly by
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:mod:`diet_guard._sync` -- it was never defined here.)
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"""
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from __future__ import annotations
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from diet_guard.sync_merge._banks import (
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food_bank_to_log,
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log_to_food_bank,
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log_to_manual_bank,
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manual_bank_to_log,
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parse_remote_food_bank,
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parse_remote_manual_bank,
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)
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from diet_guard.sync_merge._budget import (
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_budget_hlc,
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budget_to_log,
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log_to_budget,
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log_to_history,
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parse_remote_budget,
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)
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from diet_guard.sync_merge._daylog import (
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_entry_hlc,
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_legacy_entry_id,
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daylog_to_log,
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entry_to_record,
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log_to_daylog,
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parse_remote_log,
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record_to_entry,
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)
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from diet_guard.sync_merge._schedule import (
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SCHEDULE_FIELD_PREFIX,
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log_to_schedule_history,
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schedule_fields,
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)
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__all__ = [
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# Private helpers the tests reach for directly. Re-exported deliberately:
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# they were importable from the flat module, and dropping them here would
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# break those tests for a naming reason rather than a behavioural one.
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"SCHEDULE_FIELD_PREFIX",
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"_budget_hlc",
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"_entry_hlc",
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"_legacy_entry_id",
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"budget_to_log",
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"daylog_to_log",
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"entry_to_record",
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"food_bank_to_log",
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"log_to_budget",
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"log_to_daylog",
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"log_to_food_bank",
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"log_to_history",
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"log_to_manual_bank",
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"log_to_schedule_history",
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"manual_bank_to_log",
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"parse_remote_budget",
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"parse_remote_food_bank",
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"parse_remote_log",
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"parse_remote_manual_bank",
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"record_to_entry",
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"schedule_fields",
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]
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