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# encoding: utf-8
# This file is part of py-serializable
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# SPDX-License-Identifier: Apache-2.0
# Copyright (c) Paul Horton. All Rights Reserved.
from abc import ABC, abstractmethod
from re import compile as re_compile
from typing import Type
class BaseNameFormatter(ABC):
@classmethod
@abstractmethod
def encode(cls, property_name: str) -> str:
pass
@classmethod
@abstractmethod
def decode(cls, property_name: str) -> str:
pass
@classmethod
def decode_as_class_name(cls, name: str) -> str:
name = CamelCasePropertyNameFormatter.encode(cls.decode(property_name=name))
return name[:1].upper() + name[1:]
@classmethod
def decode_handle_python_builtins_and_keywords(cls, name: str) -> str:
return name
@classmethod
def encode_handle_python_builtins_and_keywords(cls, name: str) -> str:
return name
class CamelCasePropertyNameFormatter(BaseNameFormatter):
_ENCODE_PATTERN = re_compile(r'_([a-z])')
_DECODE_PATTERN = re_compile(r'(?<!^)(?=[A-Z])')
@classmethod
def encode(cls, property_name: str) -> str:
property_name = property_name[:1].lower() + property_name[1:]
return cls.encode_handle_python_builtins_and_keywords(
CamelCasePropertyNameFormatter._ENCODE_PATTERN.sub(lambda x: x.group(1).upper(), property_name)
)
@classmethod
def decode(cls, property_name: str) -> str:
return cls.decode_handle_python_builtins_and_keywords(
CamelCasePropertyNameFormatter._DECODE_PATTERN.sub('_', property_name).lower()
)
class KebabCasePropertyNameFormatter(BaseNameFormatter):
_ENCODE_PATTERN = re_compile(r'(_)')
@classmethod
def encode(cls, property_name: str) -> str:
property_name = cls.encode_handle_python_builtins_and_keywords(name=property_name)
property_name = property_name[:1].lower() + property_name[1:]
return KebabCasePropertyNameFormatter._ENCODE_PATTERN.sub(lambda x: '-', property_name)
@classmethod
def decode(cls, property_name: str) -> str:
return cls.decode_handle_python_builtins_and_keywords(property_name.replace('-', '_'))
class SnakeCasePropertyNameFormatter(BaseNameFormatter):
_ENCODE_PATTERN = re_compile(r'(.)([A-Z][a-z]+)')
@classmethod
def encode(cls, property_name: str) -> str:
property_name = property_name[:1].lower() + property_name[1:]
return cls.encode_handle_python_builtins_and_keywords(
SnakeCasePropertyNameFormatter._ENCODE_PATTERN.sub(lambda x: x.group(1).upper(), property_name)
)
@classmethod
def decode(cls, property_name: str) -> str:
return cls.decode_handle_python_builtins_and_keywords(property_name)
class CurrentFormatter:
formatter: Type['BaseNameFormatter'] = CamelCasePropertyNameFormatter
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