前言

單憑是否快過期，優先使用過期食材進行料理，乍聽之下很合理，但是，如果快要過期的東西，都是一堆「調味料」，那該怎麼辦？

Scoring Model

為了避免拿一堆調味料當主菜使用，應該釐清用途後，再進行權值計算。
先列出一個基礎的想法：用 期限、用途、剩餘量 來算分數。

Priority Score = Expiration Score + Role Score + Quantity Score

建立 RecommendationService

app/
├── services/
│   ├── ingredient_context_service.py
│   └── recommendation_service.py

計算權重

class RecommendationService:

    def calculate_score(self, ingredient):
        score = 0

        remaining_days = ingredient[
            "remaining_days"
        ]

        if remaining_days is not None:
            if remaining_days <= 0:
                score += 100
            elif remaining_days == 1:
                score += 80
            elif remaining_days == 2:
                score += 60
            elif remaining_days == 3:
                score += 40
            else:
                score += 10

        role_scores = {
            "PROTEIN": 30,
            "VEGETABLE": 30,
            "CARB": 20,
            "DAIRY": 10,
            "CONDIMENT": 0,
        }

        score += role_scores.get(
            ingredient["role"],
            0
        )

        return score

Design API

GET /api/recommendations/ingredients

Response

[
  {
    "name": "豆腐",
    "remaining_days": 1,
    "role": "PROTEIN",
    "score": 110
  },
  {
    "name": "青江菜",
    "remaining_days": 2,
    "role": "VEGETABLE",
    "score": 90
  }
]