262 lines
10 KiB
Python
262 lines
10 KiB
Python
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from meals import Meal
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from ingredients import Ingredient, insert_ingredient
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from persons import Person
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from products import Product
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from pydantic import BaseModel
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from typing import AsyncIterator, List, ClassVar, Optional
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from datetime import datetime
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class ShoppingListRequest(BaseModel):
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KEYS: ClassVar[List[str]] = ['id', 'ingredient_id', 'list_id', 'person_id', 'meal_id', 'created_date']
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id: int = 0
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list_id: int
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ingredient_id: int
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ingredient: Optional[Ingredient] = None
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person_id: Optional[int] = None
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person: Optional[Person] = None
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meal_id: Optional[int] = None
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meal: Optional[Meal] = None
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created_date: datetime = datetime.now()
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class ShoppingListResult(BaseModel):
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KEYS: ClassVar[List[str]] = ['id', 'product_id', 'list_id', 'quantity', 'unit', 'created_date', 'found_date']
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id: int = 0
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product_id: int
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list_id: int
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quantity: float
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unit: str
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created_date: datetime = datetime.now()
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found_date: Optional[datetime] = None
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class ShoppingList(BaseModel):
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KEYS: ClassVar[List[str]] = ['id', 'created_date', 'purchased_date']
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id: int = 0
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created_date: datetime = datetime.now()
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purchased_date: Optional[datetime] = None
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requests: List[ShoppingListRequest] = []
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items: List[ShoppingListResult] = []
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async def create(conn):
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await conn.execute('''
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CREATE TABLE IF NOT EXISTS ShoppingList (
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id INTEGER PRIMARY KEY,
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created_date TEXT,
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purchased_date TEXT
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);''')
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await conn.execute('''
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CREATE TABLE IF NOT EXISTS ShoppingListRequest (
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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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created_date TEXT,
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FOREIGN KEY(ingredient_id) REFERENCES Ingredient(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(list_id) REFERENCES ShoppingList(id)
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);''')
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await conn.execute('''
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CREATE TABLE IF NOT EXISTS ShoppingListResult (
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id INTEGER PRIMARY KEY,
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product_id INTEGER,
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list_id INTEGER,
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quantity REAL,
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unit TEXT,
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created_date TEXT,
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found_date TEXT,
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FOREIGN KEY(product_id) REFERENCES Product(id),
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FOREIGN KEY(list_id) REFERENCES ShoppingList(id)
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);''')
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async def insert_shopping_list(conn, shopping_list: ShoppingList):
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async with conn.execute('''
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INSERT INTO ShoppingList (id, created_date, purchased_date)
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VALUES (?, ?, ?)
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''', (shopping_list.id, shopping_list.created_date, shopping_list.purchased_date)) as cursor:
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shopping_list.id = cursor.lastrowid
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for request in shopping_list.requests:
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if not request.ingredient_id:
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await insert_ingredient(conn, request.ingredient)
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request.ingredient_id = request.ingredient.id
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await conn.execute('''
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INSERT INTO ShoppingListRequest (id, ingredient_id, list_id, person_id, meal_id, created_date)
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VALUES (?, ?, ?, ?, ?, ?)
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''', (request.id, request.ingredient_id, shopping_list.id, request.person_id, request.meal_id, request.created_date))
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for item in shopping_list.items:
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item.product_id = item.product.id
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await conn.execute('''
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INSERT INTO ShoppingListResult (id, product_id, list_id, quantity, unit, created_date, found_date)
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VALUES (?, ?, ?, ?, ?, ?, ?)
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''', (item.id, item.product_id, shopping_list.id, item.quantity, item.unit, item.created_date, item.found_date))
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async def find_requests_by_list_id(conn, list_id: int) -> AsyncIterator[ShoppingListRequest]:
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# Join Ingredient and Product to also load ingredient and product
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ingredient_keys = [f'ingredient.{key}' for key in Ingredient.KEYS]
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product_keys = [f'product.{key}' for key in Product.KEYS]
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request_keys = [f'shoppinglistrequest.{key}' for key in ShoppingListRequest.KEYS]
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person_keys = [f'person.{key}' for key in Person.KEYS]
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cursor = await conn.execute(f'''
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SELECT {','.join(ingredient_keys + product_keys + request_keys + person_keys)}
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FROM ShoppingListRequest
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LEFT JOIN Ingredient ON ShoppingListRequest.ingredient_id = Ingredient.id
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LEFT JOIN Product ON Ingredient.product_id = Product.id
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LEFT JOIN Person ON ShoppingListRequest.person_id = Person.id
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WHERE list_id = ?
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''', (list_id,))
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async for row in cursor:
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product_keys = {k:v for k,v in zip(Product.KEYS, row[len(Ingredient.KEYS):len(Ingredient.KEYS) + len(Product.KEYS)])}
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product = Product(**product_keys) if product_keys['id'] else None
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ingredient_keys = {k:v for k,v in zip(Ingredient.KEYS, row[:len(Ingredient.KEYS)])}
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ingredient = Ingredient(**ingredient_keys, product=product)
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person_keys = {k:v for k,v in zip(Person.KEYS, row[-len(Person.KEYS):])}
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person = Person(**person_keys) if person_keys['id'] else None
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request_keys = {k:v for k,v in zip(ShoppingListRequest.KEYS, row[len(Ingredient.KEYS) + len(Product.KEYS):-len(Person.KEYS)])}
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request = ShoppingListRequest(**request_keys, ingredient=ingredient, person=person)
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yield request
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async def find_items_by_list_id(conn, list_id: int) -> AsyncIterator[ShoppingListResult]:
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product_keys = [f'product.{key}' for key in Product.KEYS]
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result_keys = [f'shoppinglistresult.{key}' for key in ShoppingListResult.KEYS]
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async with conn.execute(f'''
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SELECT {','.join(product_keys + result_keys)}
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FROM ShoppingListResult
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LEFT JOIN Product ON ShoppingListResult.product_id = Product.id
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WHERE list_id = ?
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''', (list_id,)) as cursor:
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async for row in cursor:
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product_keys = {k:v for k,v in zip(Product.KEYS, row[:len(Product.KEYS)])}
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product = Product(**product_keys) if product_keys['id'] else None
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result_keys = {k:v for k,v in zip(ShoppingListResult.KEYS, row[len(Product.KEYS):])}
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result = ShoppingListResult(**result_keys, product=product)
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yield result
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async def fill_related(conn, shopping_list: ShoppingList) -> ShoppingList:
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async for request in find_requests_by_list_id(conn, shopping_list.id):
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shopping_list.requests.append(request)
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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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async def load_shopping_list(conn, id: int) -> ShoppingList:
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shopping_list = None
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async with conn.execute(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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''', (id,)) 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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await fill_related(conn, shopping_list)
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return shopping_list
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async def current_shopping_list(conn) -> ShoppingList:
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shopping_list = None
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async with conn.execute(f'''
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SELECT {','.join(ShoppingList.KEYS)} FROM ShoppingList
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WHERE purchased_date IS NULL
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LIMIT 1
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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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await fill_related(conn, shopping_list)
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break
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if not shopping_list:
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shopping_list = ShoppingList()
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await insert_shopping_list(conn, shopping_list)
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return shopping_list
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async def find_existing_result(conn, product: Product, shopping_list: ShoppingList) -> ShoppingListResult:
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async with conn.execute(f'''
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SELECT {','.join(ShoppingListResult.KEYS)} FROM ShoppingListResult
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WHERE product_id = ? AND list_id = ?
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LIMIT 1
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''', (product.id, shopping_list.id)) as cursor:
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async for row in cursor:
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return ShoppingListResult(**{k:v for k,v in zip(ShoppingListResult.KEYS, row)}, product=product)
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return None
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async def get_persons_requests(conn, shopping_list: ShoppingList, person: Person) -> AsyncIterator[ShoppingListRequest]:
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async for request in find_requests_by_list_id(conn, shopping_list.id):
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if request.person_id == person.id:
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yield request
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async def request_ingredient(conn, shopping_list: ShoppingList, person: Person, ingredient: Ingredient):
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if ingredient.id:
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raise ValueError('How did you get an existing ingredient?')
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await insert_ingredient(conn, ingredient)
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request = ShoppingListRequest(ingredient_id=ingredient.id, list_id=shopping_list.id, person_id=person.id, created_date=datetime.now())
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async with conn.execute('''
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INSERT INTO ShoppingListRequest (ingredient_id, list_id, person_id, created_date)
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VALUES (?, ?, ?, ?)
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''', (request.ingredient_id, request.list_id, request.person_id, request.created_date)) as cursor:
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request.id = cursor.lastrowid
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shopping_list.requests.append(request)
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async def sync_persons_requests(conn, shopping_list: ShoppingList, person: Person, requests: List[Ingredient]):
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# Delete existing and insert all as new
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async for request in get_persons_requests(conn, shopping_list, person):
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await conn.execute('''
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DELETE FROM ShoppingListRequest
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WHERE id = ?
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''', (request.id,))
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for ingredient in requests:
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ingredient.id = 0
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await request_ingredient(conn, shopping_list, person, ingredient)
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async def mark_found(conn, product: Product, quantity: float, unit: str) -> ShoppingListResult:
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shopping_list = await current_shopping_list(conn)
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existing = await find_existing_result(conn, product, shopping_list)
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if existing:
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existing.quantity, existing.unit, existing.found_date = quantity, unit, datetime.now()
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await conn.execute('''
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UPDATE ShoppingListResult
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SET quantity = ?, unit = ?, found_date = ?
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WHERE id = ?
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''', (existing.quantity, existing.unit, existing.found_date, existing.id))
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return existing
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else:
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result = ShoppingListResult(product=product, product_id=product.id, list_id=shopping_list.id, quantity=quantity, unit=unit, found_date=datetime.now())
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async with conn.execute('''
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INSERT INTO ShoppingListResult (product_id, list_id, quantity, unit, created_date, found_date)
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VALUES (?, ?, ?, ?, ?, ?)
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''', (result.product_id, result.list_id, quantity, unit, result.created_date, result.found_date)) as cursor:
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result.id = cursor.lastrowid
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shopping_list.items.append(result)
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return result
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