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import sys
from voluptuous.error import LiteralInvalid, TypeInvalid, Invalid
from voluptuous.schema_builder import Schema, default_factory, raises
from voluptuous import validators
__author__ = 'tusharmakkar08'
def _fix_str(v):
if sys.version_info[0] == 2 and isinstance(v, unicode):
s = v
else:
s = str(v)
return s
def Lower(v):
"""Transform a string to lower case.
>>> s = Schema(Lower)
>>> s('HI')
'hi'
"""
return _fix_str(v).lower()
def Upper(v):
"""Transform a string to upper case.
>>> s = Schema(Upper)
>>> s('hi')
'HI'
"""
return _fix_str(v).upper()
def Capitalize(v):
"""Capitalise a string.
>>> s = Schema(Capitalize)
>>> s('hello world')
'Hello world'
"""
return _fix_str(v).capitalize()
def Title(v):
"""Title case a string.
>>> s = Schema(Title)
>>> s('hello world')
'Hello World'
"""
return _fix_str(v).title()
def Strip(v):
"""Strip whitespace from a string.
>>> s = Schema(Strip)
>>> s(' hello world ')
'hello world'
"""
return _fix_str(v).strip()
class DefaultTo(object):
"""Sets a value to default_value if none provided.
>>> s = Schema(DefaultTo(42))
>>> s(None)
42
>>> s = Schema(DefaultTo(list))
>>> s(None)
[]
"""
def __init__(self, default_value, msg=None):
self.default_value = default_factory(default_value)
self.msg = msg
def __call__(self, v):
if v is None:
v = self.default_value()
return v
def __repr__(self):
return 'DefaultTo(%s)' % (self.default_value(),)
class SetTo(object):
"""Set a value, ignoring any previous value.
>>> s = Schema(validators.Any(int, SetTo(42)))
>>> s(2)
2
>>> s("foo")
42
"""
def __init__(self, value):
self.value = default_factory(value)
def __call__(self, v):
return self.value()
def __repr__(self):
return 'SetTo(%s)' % (self.value(),)
class Set(object):
"""Convert a list into a set.
>>> s = Schema(Set())
>>> s([]) == set([])
True
>>> s([1, 2]) == set([1, 2])
True
>>> with raises(Invalid, regex="^cannot be presented as set: "):
... s([set([1, 2]), set([3, 4])])
"""
def __init__(self, msg=None):
self.msg = msg
def __call__(self, v):
try:
set_v = set(v)
except Exception as e:
raise TypeInvalid(
self.msg or 'cannot be presented as set: {0}'.format(e))
return set_v
def __repr__(self):
return 'Set()'
class Literal(object):
def __init__(self, lit):
self.lit = lit
def __call__(self, value, msg=None):
if self.lit != value:
raise LiteralInvalid(
msg or '%s not match for %s' % (value, self.lit)
)
else:
return self.lit
def __str__(self):
return str(self.lit)
def __repr__(self):
return repr(self.lit)
def u(x):
if sys.version_info < (3,):
return unicode(x)
else:
return x