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65 lines
1.9 KiB
Python
65 lines
1.9 KiB
Python
from abc import ABC, abstractmethod
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from dataclasses import dataclass
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from typing import Optional
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from cookbook.models import ShoppingListEntry, User, ConnectorConfig
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@dataclass
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class UserDTO:
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username: str
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first_name: Optional[str]
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@staticmethod
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def create_from_user(instance: User) -> 'UserDTO':
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return UserDTO(
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username=instance.username,
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first_name=instance.first_name if instance.first_name else None
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)
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@dataclass
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class ShoppingListEntryDTO:
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food_name: str
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amount: Optional[float]
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base_unit: Optional[str]
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unit_name: Optional[str]
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created_by: UserDTO
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@staticmethod
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def try_create_from_entry(instance: ShoppingListEntry) -> Optional['ShoppingListEntryDTO']:
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if instance.food is None or instance.created_by is None:
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return None
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return ShoppingListEntryDTO(
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food_name=instance.food.name,
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amount=instance.amount if instance.amount else None,
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unit_name=instance.unit.name if instance.unit else None,
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base_unit=instance.unit.base_unit if instance.unit and instance.unit.base_unit else None,
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created_by=UserDTO.create_from_user(instance.created_by),
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)
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# A Connector is 'destroyed' & recreated each time 'any' ConnectorConfig in a space changes.
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class Connector(ABC):
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@abstractmethod
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def __init__(self, config: ConnectorConfig):
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pass
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@abstractmethod
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async def on_shopping_list_entry_created(self, instance: ShoppingListEntryDTO) -> None:
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pass
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# This method might not trigger on 'direct' entry updates: https://stackoverflow.com/a/35238823
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@abstractmethod
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async def on_shopping_list_entry_updated(self, instance: ShoppingListEntryDTO) -> None:
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pass
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@abstractmethod
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async def on_shopping_list_entry_deleted(self, instance: ShoppingListEntryDTO) -> None:
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pass
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@abstractmethod
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async def close(self) -> None:
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pass
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