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Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
SPDX-License-Identifier: MIT-0
"""
from __future__ import annotations
from typing import Iterator
def _get_new_status_message(
current_status: dict[str, bool], new_status: dict[str, bool]
) -> Iterator[str]:
for k, v in new_status.items():
if v is not None:
if current_status.get(k) is not None and current_status.get(k) != v:
yield (
f"condition {k!r} to {v!r} from current "
f"status {current_status.get(k)!r}"
)
else:
yield f"condition {k!r} to {v!r}"
def _get_current_status_message(
current_status: dict[str, bool], new_status: dict[str, bool]
) -> Iterator[str]:
for k, v in current_status.items():
if v is not None and k not in new_status:
yield f"condition {k!r} is {v!r}"
def _build_message(current_status: dict[str, bool], new_status: dict[str, bool]) -> str:
message = ", and ".join(_get_new_status_message(current_status, new_status))
current_message = " and ".join(
_get_current_status_message(current_status, new_status)
)
if current_message:
message += f". Where existing status for {current_message}"
return f"When setting {message}"
class Unsatisfiable(ValueError):
def __init__(
self,
new_status: dict[str, bool],
current_status: dict[str, bool],
) -> None:
message = _build_message(current_status, new_status)
super().__init__(message)
self.message = message
self.current_status = current_status
self.new_status = new_status
def __repr__(self):
return f"<{self.__class__.__name__}: {self.message!r}>"
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