1 import re

     2 from inspect import getcallargs

     3 from .error import ValidateException

     4 

     5 def vuserhash(hash):

     6     '''vailidate function for userhash'''

     7     if not re.match(r'^[a-f0-9]{15,}$', hash.lower()):

     8         raise ValidateException()

     9     return True

    10 

    11 def validate(**kargs):

    12     '''validate decorator

    13     use it like this:

    14         @validate(userhash=vuserhash)

    15         f(userhash)

    16     that will validate usrhah with the function vuserhash.

    17     Every validate function should raise an Exception, if the the value is not valide'''

    18     def v(f):

    19         def new_f(*a,**k):

    20             kp=getcallargs(f,*a,**k)

    21             for i in kargs:

    22                 kargs[i](kp[i])

    23             return f(*a,**k)

    24         new_f.__name__ = f.__name__

    25         return new_f

    26     return v

    27