diet-guard/diet_guard/_budget_derived.py
Krzysztof kuhy Rudnicki 3e51e614b1 Split the last seven Python files; extend the redirect guard to all five paths
Ninth batch of the 250-line sweep. Every Python file in the repo is now under
cap (over-cap count 25 -> 18; the 18 remaining are all Dart).

  _foodbank.py             365 -> 210  (+ _foodbank_search, _foodbank_rebuild)
  test_averages.py         351 -> 222  (+ test_averages_report.py)
  _estimator.py            325 -> 137  (+ _estimator_off.py)
  _budget.py               323 -> 227  (+ _budget_biometrics, _budget_derived)
  test_foodbank.py         311 -> 117  (+ test_foodbank_rebuild.py)
  _averages.py             298 -> 174  (+ _averages_periods, _averages_report)
  test_budget_history.py   288 -> 162  (+ test_budget_history_io.py)

The split boundaries are constrained by which module owns each conftest-patched
state path, not by line count. BUDGET_FILE stays in _budget, FOOD_BANK_FILE in
_foodbank: the derived/search/rebuild halves reach the file only through their
parent's private helpers. Two of the new modules had copied FOOD_BANK_FILE into
their headers as an incidental import, which is exactly the leak the guard is
for -- both cleaned.

test_state_redirect.py now covers all five redirected paths (FOOD_LOG_FILE,
BUDGET_FILE, BUDGET_HISTORY_FILE, FOOD_BANK_FILE, MANUAL_BANK_FILE) rather
than just the food log, in both directions: only the owning module may name
each constant, and each redirect demonstrably moves a real write off the live
path.

Two rewires fail-closed rather than silently: `_budget.budget_weight` and
`_estimator.requests` were module-attribute references no import rewrite
touches, and both raised AttributeError immediately. The latter appeared only
after ruff removed the now-unused `requests` import from _estimator -- the
import was load-bearing solely as a patch target.

Verified: 707 Python tests / 100% branch coverage, 5 layout-fits tests under
xvfb, check_patch_targets 0, pre-commit clean, ~/.local/share/diet_guard
byte-identical.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RA9ynjqXPnexRQnR5oAuCC
2026-08-15 20:37:05 +02:00

52 lines
1.7 KiB
Python

"""Values derived from the stored budget record.
Split out of :mod:`._budget` to keep both files under the repo's 250-line
limit. Nothing here opens a file: both helpers read through
:func:`diet_guard._budget._read_record`, so ``BUDGET_FILE`` stays named by
:mod:`._budget` alone -- which is what ``tests/conftest.py`` redirects, and
what ``test_state_redirect.py`` enforces.
"""
from __future__ import annotations
from diet_guard._budget import PROTEIN_G_PER_KG, BudgetError, _read_record
__all__ = ["budget_weight", "protein_target_g"]
def protein_target_g() -> float | None:
"""Return the daily protein target in grams, or None if it cannot be derived.
Derived from the stored body weight at :data:`PROTEIN_G_PER_KG`. Returns
None -- rather than raising -- whenever the target is simply unavailable
(no budget set, a pre-v2 record without weight, or a corrupt file), so
the dashboard can show calories and quietly omit the protein line.
Returns:
The protein target in grams, or None when weight is unknown.
"""
try:
weight = budget_weight()
except BudgetError:
return None
if weight is None:
return None
return round(weight * PROTEIN_G_PER_KG, 1)
def budget_weight() -> float | None:
"""Return the body weight stored with the budget, or None if unavailable.
Returns:
The stored weight in kg, or None for a pre-v2 (budget-only) record.
Raises:
BudgetNotInitializedError: If no budget has been set yet.
BudgetFileCorruptError: If the file exists but cannot be parsed.
"""
record = _read_record()
value = record.get("w")
if isinstance(value, bool) or not isinstance(value, (int, float)):
return None
return float(value)