| """ |
| 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}>" |
|
|
