Craig
92 lines
3.2 KiB
Python
92 lines
3.2 KiB
Python
"""Meals router (spec §3.2). Thin handlers — business logic in services/meals.py."""
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from fastapi import APIRouter, Depends, HTTPException
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from sqlalchemy.orm import Session
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from database import get_db
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from schemas import (
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LogEntryRead,
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MealComponentsUpdateRequest,
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MealFromLogRequest,
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MealFromLogResponse,
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MealRead,
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MealUnpackRequest,
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MealUnpackResponse,
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)
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from services import meals as svc
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router = APIRouter(prefix="/api/meals", tags=["meals"])
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@router.post("/from-log", response_model=MealFromLogResponse, status_code=201)
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def create_meal_from_log(data: MealFromLogRequest, db: Session = Depends(get_db)):
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"""Create a meal food from selected daily log entries (§4.3).
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Runs as one transaction: creates the meal + components, deletes source
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entries, inserts one replacement entry. Rolls back entirely on failure.
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"""
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try:
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meal, entry = svc.create_meal_from_log(
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db, data.date, data.entry_ids, data.name,
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)
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except svc.EntryNotFoundError as e:
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raise HTTPException(status_code=404, detail=str(e))
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except svc.EntryDateMismatchError as e:
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raise HTTPException(status_code=400, detail=str(e))
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except ValueError as e:
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raise HTTPException(status_code=400, detail=str(e))
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return MealFromLogResponse(meal=meal, entry=entry)
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@router.post("/{meal_id}/unpack", response_model=MealUnpackResponse)
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def unpack_meal(
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meal_id: int,
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data: MealUnpackRequest,
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db: Session = Depends(get_db),
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):
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"""Replace a logged meal entry with its leaf component entries (§4.4).
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Components are resolved recursively — nested meals are flattened to
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leaf foods with their scaling factors multiplied down.
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Runs as one transaction. If multiple entries match the meal on this
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date, specify ``entry_id`` to disambiguate.
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"""
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try:
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entries = svc.unpack_meal(db, meal_id, data.date, data.entry_id)
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except svc.EntryNotFoundError as e:
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raise HTTPException(status_code=404, detail=str(e))
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except svc.AmbiguousMealEntryError as e:
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raise HTTPException(status_code=400, detail=str(e))
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except ValueError as e:
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raise HTTPException(status_code=400, detail=str(e))
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return MealUnpackResponse(entries=entries)
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@router.put("/{meal_id}/components", response_model=MealRead)
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def update_meal_components(
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meal_id: int,
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data: MealComponentsUpdateRequest,
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db: Session = Depends(get_db),
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):
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"""Replace a meal's component list (§3.2 PUT). Cycle-checked.
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Components are validated for cycles (direct or transitive self-reference).
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A 422 is returned when the update would create a cycle.
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This is a full replacement — all existing components are removed and
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replaced with the provided list.
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"""
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comps = [{"food_id": c.food_id, "quantity": c.quantity} for c in data.components]
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try:
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return svc.update_meal_components(db, meal_id, comps)
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except svc.MealNotFoundError as e:
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raise HTTPException(status_code=404, detail=str(e))
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except svc.ComponentFoodNotFoundError as e:
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raise HTTPException(status_code=404, detail=str(e))
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except svc.MealCycleError as e:
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raise HTTPException(status_code=422, detail=str(e))
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