98 lines
2.0 KiB
Python
98 lines
2.0 KiB
Python
from abc import ABC, abstractmethod
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from functools import reduce
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from operator import or_
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class ValidatorException(Exception):
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pass
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class Validator(ABC):
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@staticmethod
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def of(x):
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if isinstance(x, Validator):
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return x
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if callable(x):
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return LambdaValidator(x)
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if x in validator_types:
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return validator_types[x]()
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raise ValidatorException("Cannot create validator")
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@abstractmethod
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def isValid(self, value):
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pass
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class LambdaValidator(Validator):
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def __init__(self, c):
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self.callable = c
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def isValid(self, value):
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return self.callable(value)
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class TypeValidator(Validator):
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def __init__(self, type):
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self.type = type
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super().__init__()
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def isValid(self, value):
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return isinstance(value, self.type)
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class IntegerValidator(TypeValidator):
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def __init__(self):
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super().__init__(int)
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class FloatValidator(TypeValidator):
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def __init__(self):
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super().__init__(float)
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class StringValidator(TypeValidator):
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def __init__(self):
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super().__init__(str)
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class BoolValidator(TypeValidator):
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def __init__(self):
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super().__init__(bool)
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class OrValidator(Validator):
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def __init__(self, *validators):
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self.validators = validators
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super().__init__()
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def isValid(self, value):
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return reduce(
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or_,
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[v.isValid(value) for v in self.validators],
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False
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)
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class NumberValidator(OrValidator):
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def __init__(self):
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super().__init__(IntegerValidator(), FloatValidator())
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class RegexValidator(StringValidator):
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def __init__(self, regex):
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self.regex = regex
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super().__init__()
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def isValid(self, value):
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return super().isValid(value) and self.regex.match(value) is not None
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validator_types = {
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"string": StringValidator,
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"str": StringValidator,
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"integer": IntegerValidator,
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"int": IntegerValidator,
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"number": NumberValidator,
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"num": NumberValidator,
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}
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