markusressel/container-app-conf

#  Copyright (c) 2019 Markus Ressel
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#  of this software and associated documentation files (the "Software"), to deal
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#  furnished to do so, subject to the following conditions:
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#  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
#  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
#  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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from py_range_parse import Range

from container_app_conf import ConfigEntry


class IntConfigEntry(ConfigEntry):
    _example = "42"

    def __init__(self, key_path: [str], example: any = None, description: str or None = None, default: any = None,
                 required: bool = None, secret: bool = None, range: Range = None):
        self.range = range
        super().__init__(key_path, example, description, default, required, secret)

    def _value_to_type(self, value: any) -> int or None:
        """
        Tries to permissively convert the given value to an int.
        :param value: the value to parse
        :return: the parsed int value
        """
        parsed_value = int(value)
        if self.range is not None and parsed_value not in self.range:
            raise ValueError("Value not in range: {} not in {}".format(parsed_value, self.range))
        return parsed_value

    def _type_to_value(self, type: any) -> any:
        if type is None:
            return None
        return int(type)