338 lines
10 KiB
Python
338 lines
10 KiB
Python
from datetime import datetime
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from enum import Enum
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from typing import Any, AsyncIterator, ClassVar, List, Optional
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from pydantic import Field
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from common import BaseLinkedModel
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from ingredients import Ingredient, insert_ingredient
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from meals import Meal, find_meal_by_id, mark_purchased
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from persons import Person
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class ShoppingListItem(BaseLinkedModel):
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KEYS: ClassVar[List[str]] = [
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"id",
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"ingredient_id",
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"list_id",
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"person_id",
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"meal_id",
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"recipe_id",
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"created_date",
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]
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id: int = -1
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list_id: Optional[int] = None
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person_id: int = -1
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ingredient_id: Optional[int] = None
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recipe_id: Optional[int] = None
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meal_id: Optional[int] = None
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created_date: datetime = Field(default_factory=lambda: datetime.now().astimezone())
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class StoreEnum(str, Enum):
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woolworths = "woolworths"
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coles = "coles"
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home = ""
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class ShoppingList(BaseLinkedModel):
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KEYS: ClassVar[List[str]] = ["id", "created_date", "store_name"]
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id: int = -1
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created_date: datetime = Field(default_factory=lambda: datetime.now().astimezone())
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store_name: StoreEnum = StoreEnum.home
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purchased_by_id: int = -1
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purchased_by: Optional[Person] = None
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items: List[ShoppingListItem] = Field(default_factory=list)
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async def create(conn):
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await conn.execute(
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"""
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CREATE TABLE IF NOT EXISTS ShoppingList (
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id INTEGER PRIMARY KEY,
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created_date DATETIME NOT NULL,
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store_name TEXT NOT NULL,
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purchased_by_id INTEGER,
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FOREIGN KEY(purchased_by_id) REFERENCES Person(id)
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);"""
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)
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await conn.execute(
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"""
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CREATE TABLE IF NOT EXISTS ShoppingListItem (
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id INTEGER PRIMARY KEY,
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ingredient_id INTEGER,
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list_id INTEGER,
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person_id INTEGER,
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meal_id INTEGER,
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recipe_id INTEGER,
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created_date DATETIME NOT NULL,
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FOREIGN KEY(ingredient_id) REFERENCES Ingredient(id),
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FOREIGN KEY(list_id) REFERENCES ShoppingList(id),
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FOREIGN KEY(person_id) REFERENCES Person(id),
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FOREIGN KEY(meal_id) REFERENCES Meal(id),
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FOREIGN KEY(recipe_id) REFERENCES Recipe(id)
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);"""
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)
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def validate_request(request: ShoppingListItem) -> None:
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if request.person_id < 0:
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raise ValueError("Requests must have a person")
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# A request must have either an ingredient or a meal, but not both
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if not request.ingredient_id and not request.meal_id:
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raise ValueError("Request must have either an ingredient or a meal")
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async def purchase(conn, shopping_list: ShoppingList) -> None:
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if shopping_list.purchased_by_id is None or shopping_list.purchased_by_id < 0:
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raise ValueError("Shopping list must have a person id")
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if shopping_list.items is None or len(shopping_list.items) == 0:
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raise ValueError("Shopping list must have items")
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shopping_list.created_date = datetime.now().astimezone()
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async with conn.execute(
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"""
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INSERT INTO ShoppingList (created_date, store_name, purchased_by_id)
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VALUES (?, ?, ?)
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""",
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(
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shopping_list.created_date.isoformat(),
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shopping_list.store_name,
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shopping_list.purchased_by_id,
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),
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) as cursor:
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shopping_list.id = cursor.lastrowid
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for item in shopping_list.items:
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item.list_id = shopping_list.id
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validate_request(item)
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if item.ingredient_id is None or item.ingredient_id < 0:
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raise ValueError("Ingredient request must have a valid ingredient id")
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isMeal = item.meal_id is not None and item.meal_id >= 0
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isPersonRequest = (not isMeal) and item.person_id is not None and item.person_id >= 0
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if not isMeal and not isPersonRequest:
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raise ValueError("Ingredient request must have either a meal or a person id")
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if isPersonRequest:
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# Update existing request from its null id, or throw
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async with conn.execute(
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"""
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UPDATE ShoppingListItem
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SET list_id = ?
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WHERE ingredient_id = ?
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AND list_id IS NULL
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AND person_id = ?
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AND meal_id IS NULL
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AND recipe_id IS NULL
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""",
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(shopping_list.id, item.ingredient_id, item.person_id),
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) as cursor:
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if cursor.rowcount == 0:
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raise ValueError(
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"Ingredient request must have a valid person id and ingredient id"
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)
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elif isMeal:
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# Insert new request for meal
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if item.meal_id is None or item.meal_id < 0:
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raise ValueError("Meal request must have a valid meal id")
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async with conn.execute(
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"""
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INSERT INTO ShoppingListItem (ingredient_id, list_id, person_id, meal_id, recipe_id, created_date)
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VALUES (?, ?, ?, ?, ?, ?)
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""",
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(
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item.ingredient_id,
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shopping_list.id,
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item.person_id,
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item.meal_id,
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item.recipe_id,
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item.created_date.isoformat(),
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),
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) as cursor:
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item.id = cursor.lastrowid
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meal_ids = list(
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{
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item.meal_id
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for item in shopping_list.items
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if item.meal_id is not None and item.meal_id >= 0
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}
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)
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await update_purchased_meals(conn, meal_ids)
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async def update_purchased_meals(conn, meal_ids: List[int]) -> None:
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if not meal_ids:
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return
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purchased_ingredient_ids = {
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item.ingredient_id async for item in get_purchased_ingredients(conn, meal_ids)
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}
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for meal_id in meal_ids:
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meal = await find_meal_by_id(conn, meal_id)
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if not meal:
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continue
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ingredients = {
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ingredient.id
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for mr in meal.recipes
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for ingredient in (mr.recipe.ingredients if mr.recipe else [])
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} | {ingredient.id for ingredient in meal.extra_ingredients}
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remaining_ingredients = ingredients - purchased_ingredient_ids
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if not remaining_ingredients:
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await mark_purchased(conn, meal)
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await remove_request(conn, person=None, meal=meal)
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async def is_requested(conn, meal: Meal) -> bool:
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if meal.id < 0:
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return False
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async with conn.execute(
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"""
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SELECT COUNT(*) FROM ShoppingListItem
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WHERE meal_id = ? AND list_id IS NULL
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""",
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(meal.id,),
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) as cursor:
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row = await cursor.fetchone()
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return row[0] > 0
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async def request(
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conn, person: Person, ingredient: Optional[Ingredient] = None, meal: Optional[Meal] = None
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) -> ShoppingListItem:
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if ingredient is not None and meal is not None:
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raise ValueError("Cannot request both an ingredient and a meal")
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if ingredient is None and meal is None:
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raise ValueError("Must specify either an ingredient or a meal to request")
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if meal is not None and meal.id < 0:
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raise ValueError("Meal must have a valid id")
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if ingredient is not None and ingredient.id < 0:
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await insert_ingredient(conn, ingredient)
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ingredient_id = ingredient.id if ingredient else None
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meal_id = meal.id if meal else None
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item = ShoppingListItem(ingredient_id=ingredient_id, person_id=person.id, meal_id=meal_id)
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validate_request(item)
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if meal is not None and await is_requested(conn, meal):
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raise ValueError("Meal is already requested")
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async with conn.execute(
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"""
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INSERT INTO ShoppingListItem (ingredient_id, person_id, meal_id, created_date)
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VALUES (?, ?, ?, ?)
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""",
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(item.ingredient_id, item.person_id, item.meal_id, item.created_date.isoformat()),
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) as cursor:
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item.id = cursor.lastrowid
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return item
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async def remove_request(
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conn,
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person: Optional[Person] = None,
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meal: Optional[Meal] = None,
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ingredient: Optional[Ingredient] = None,
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) -> bool:
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if meal is not None:
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async with conn.execute(
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"""
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DELETE FROM ShoppingListItem
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WHERE list_id IS NULL AND meal_id = ?
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""",
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(meal.id,),
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) as cursor:
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return cursor.rowcount > 0
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elif ingredient is not None:
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async with conn.execute(
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"""
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DELETE FROM ShoppingListItem
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WHERE list_id IS NULL AND ingredient_id = ? AND person_id = ?
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""",
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(ingredient.id, person.id if person else -1),
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) as cursor:
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return cursor.rowcount > 0
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raise ValueError("Must specify either a meal or an ingredient to remove")
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async def find_items_by_list_id(conn, list_id: Optional[int]) -> AsyncIterator[ShoppingListItem]:
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request_cols = [f"shoppinglistitem.{key}" for key in ShoppingListItem.KEYS]
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select = f"""
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SELECT {','.join(request_cols)}
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FROM ShoppingListItem
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"""
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where: str
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params: tuple[Any, ...]
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where, params = (" WHERE list_id IS NULL", ())
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if list_id is not None:
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where, params = " WHERE list_id = ?", (list_id,)
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cursor = await conn.execute(select + where, params)
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async for row in cursor:
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request_map = {k: v for k, v in zip(ShoppingListItem.KEYS, row)}
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request = ShoppingListItem(**request_map)
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yield request
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async def load_shopping_list(conn, id: int) -> Optional[ShoppingList]:
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shopping_list: Optional[ShoppingList] = None
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async with conn.execute(
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f"""
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SELECT {','.join(ShoppingList.KEYS)} FROM ShoppingList
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WHERE id = ?
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LIMIT 1
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""",
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(id,),
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) as cursor:
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async for row in cursor:
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shopping_list = ShoppingList(**{k: v for k, v in zip(ShoppingList.KEYS, row)})
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break
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if shopping_list:
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async for item in find_items_by_list_id(conn, shopping_list.id):
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shopping_list.items.append(item)
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return shopping_list
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async def get_purchased_ingredients(conn, meal_ids: List[int]) -> AsyncIterator[ShoppingListItem]:
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if not meal_ids:
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return
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async with conn.execute(
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f"""
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SELECT {','.join(ShoppingListItem.KEYS)}
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FROM ShoppingListItem
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WHERE meal_id IN ({','.join(['?'] * len(meal_ids))}) AND list_id IS NOT NULL
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""",
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meal_ids,
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) as cursor:
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async for row in cursor:
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yield ShoppingListItem(**{k: v for k, v in zip(ShoppingListItem.KEYS, row)})
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