37 lines
931 B
Python
37 lines
931 B
Python
import dataclasses
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from typing import Optional, TypeVar
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@dataclasses.dataclass
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class WithId:
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id: Optional[int]
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T = TypeVar("T", bound=WithId)
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class IndexedList(list[T]):
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def append(self, _item: T) -> None:
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if _item.id is None:
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_item.id = max((i.id or 0 for i in self), default=0) + 1
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return super().append(_item)
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def find_idx(self, _id: int) -> int:
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try:
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i, _ = next(filter(lambda it: it[1].id == _id, enumerate(self)))
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except StopIteration:
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raise ValueError(f"Could not find item with id {_id}")
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return i
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def get(self, _id: int) -> T:
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i = self.find_idx(_id)
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return self.__getitem__(i)
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def delete(self, _id: int) -> None:
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i = self.find_idx(_id)
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return super().__delitem__(i)
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def replace(self, _id: int, _obj: T) -> None:
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i = self.find_idx(_id)
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super().__setitem__(i, _obj)
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