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