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import logging
from typing import Union, Optional
logger = logging.getLogger(__name__)
class LangStrings(dict):
_lang: Optional[str]
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self._lang = None
def setlang(self, lang: str):
self._lang = lang
def __missing__(self, key):
logger.warning(f'key {key} is missing in language {self._lang}')
return '{%s}' % key
def __setitem__(self, key, value):
raise NotImplementedError(f'setting translation strings this way is prohibited (was trying to set {key}={value})')
class LangPack:
strings: dict[str, LangStrings[str, str]]
default_lang: str
def __init__(self):
self.strings = {}
self.default_lang = 'en'
def ru(self, **kwargs) -> None:
self.set(kwargs, 'ru')
def en(self, **kwargs) -> None:
self.set(kwargs, 'en')
def set(self,
strings: Union[LangStrings, dict],
lang: str) -> None:
if isinstance(strings, dict) and not isinstance(strings, LangStrings):
strings = LangStrings(**strings)
strings.setlang(lang)
if lang not in self.strings:
self.strings[lang] = strings
else:
self.strings[lang].update(strings)
def all(self, key):
result = []
for strings in self.strings.values():
result.append(strings[key])
return result
@property
def languages(self) -> list[str]:
return list(self.strings.keys())
def get(self, key: str, lang: str, *args) -> str:
return self.strings[lang][key] % args
def __call__(self, *args, **kwargs):
return self.strings[self.default_lang][args[0]]
def __getitem__(self, key):
return self.strings[self.default_lang][key]
def __setitem__(self, key, value):
raise NotImplementedError('setting translation strings this way is prohibited')
def __contains__(self, key):
return key in self.strings[self.default_lang]
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