78 lines
2.2 KiB
Python
78 lines
2.2 KiB
Python
import re
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from typing import TYPE_CHECKING, Dict, Optional, Tuple, Union
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import roman
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if TYPE_CHECKING:
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# Dummy import Collection for mypy, can be fixed with python 3.7
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from .collection import CollectionElement # noqa
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CAMEL_CASE_TO_PSEUDO_SNAKE_CASE_CONVERSION_REGEX_1 = re.compile('(.)([A-Z][a-z]+)')
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CAMEL_CASE_TO_PSEUDO_SNAKE_CASE_CONVERSION_REGEX_2 = re.compile('([a-z0-9])([A-Z])')
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def convert_camel_case_to_pseudo_snake_case(text: str) -> str:
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"""
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Converts camel case to pseudo snake case using hyphen instead of
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underscore.
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E. g. ThisText is converted to this-text.
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Credits: epost (http://stackoverflow.com/a/1176023)
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"""
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s1 = CAMEL_CASE_TO_PSEUDO_SNAKE_CASE_CONVERSION_REGEX_1.sub(r'\1-\2', text)
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return CAMEL_CASE_TO_PSEUDO_SNAKE_CASE_CONVERSION_REGEX_2.sub(r'\1-\2', s1).lower()
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def to_roman(number: int) -> str:
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"""
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Converts an arabic number within range from 1 to 4999 to the
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corresponding roman number. Returns the input converted as string on error
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conditions or higher numbers.
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"""
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try:
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return roman.toRoman(number)
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except (roman.NotIntegerError, roman.OutOfRangeError):
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return str(number)
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def get_element_id(collection_string: str, id: int) -> str:
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"""
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Returns a combined string from the collection_string and an id.
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"""
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return "{}:{}".format(collection_string, id)
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def split_element_id(element_id: Union[str, bytes]) -> Tuple[str, int]:
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"""
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Splits a combined element_id into the collection_string and the id.
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"""
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if isinstance(element_id, bytes):
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element_id = element_id.decode()
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collection_str, id = element_id.rsplit(":", 1)
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return (collection_str, int(id))
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def get_user_id(user: Optional['CollectionElement']) -> int:
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"""
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Returns the user id for an CollectionElement user.
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Returns 0 for anonymous.
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"""
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if user is None:
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user_id = 0
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else:
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user_id = user.id
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return user_id
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def str_dict_to_bytes(str_dict: Dict[str, str]) -> Dict[bytes, bytes]:
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"""
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Converts the key and the value of a dict from str to bytes.
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"""
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out = {}
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for key, value in str_dict.items():
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out[key.encode()] = value.encode()
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return out
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