Nikolay Tatarinov
d02d0a1835
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- Introduced a new `normalize_lang` function to standardize language codes across the application, ensuring consistent handling of user language preferences. - Refactored date handling utilities by adding `parse_utc_iso` and `parse_utc_iso_naive` functions for better parsing of ISO 8601 date strings, enhancing timezone awareness. - Updated various modules to utilize the new language normalization and date parsing functions, improving code clarity and maintainability. - Enhanced error handling in date validation to raise specific `DateRangeValidationError` exceptions, providing clearer feedback on validation issues. - Improved test coverage for date range validation and language normalization functionalities, ensuring robustness and reliability.
27 lines
865 B
Python
27 lines
865 B
Python
"""Single source of truth for normalizing language codes to 'ru' or 'en'.
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Use for: env DEFAULT_LANGUAGE, Accept-Language header, Telegram user.language_code,
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and initData user object in Miniapp auth.
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"""
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from typing import Literal
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def normalize_lang(code: str | None) -> Literal["ru", "en"]:
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"""Normalize a language code to 'ru' or 'en'.
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Suitable for: env DEFAULT_LANGUAGE, Accept-Language header,
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Telegram user.language_code, and initData user in Miniapp auth.
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Args:
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code: Raw language code (e.g. 'ru', 'ru-RU', 'en', 'en-US') or None.
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Returns:
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'ru' if code starts with 'ru' (after strip/lower), else 'en'.
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Returns 'en' when code is empty or not a string.
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"""
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if not code or not isinstance(code, str):
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return "en"
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code = code.strip().lower()
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return "ru" if code.startswith("ru") else "en"
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