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39 lines
1.2 KiB
Python
39 lines
1.2 KiB
Python
2 years ago
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#!/usr/bin/env python3
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# Copyright 2023 The Chromium Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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import re
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from typing import List
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# Preferred values for yes/no fields (i.e. all lowercase).
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YES = "yes"
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NO = "no"
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# Pattern used to check if the entire string is "unknown", case-insensitive.
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_PATTERN_UNKNOWN = re.compile(r"^unknown$", re.IGNORECASE)
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# Pattern used to check if the entire string is functionally empty, i.e.
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# empty string, or all characters are only whitespace.
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_PATTERN_ONLY_WHITESPACE = re.compile(r"^\s*$")
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def matches(pattern: re.Pattern, value: str) -> bool:
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"""Returns whether the value matches the pattern."""
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return pattern.match(value) is not None
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def is_empty(value: str) -> bool:
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"""Returns whether the value is functionally empty."""
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return matches(_PATTERN_ONLY_WHITESPACE, value)
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def is_unknown(value: str) -> bool:
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"""Returns whether the value is 'unknown' (case insensitive)."""
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return matches(_PATTERN_UNKNOWN, value)
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def quoted(values: List[str]) -> str:
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"""Returns a string of the given values, each being individually quoted."""
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return ", ".join([f"'{entry}'" for entry in values])
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