Kinder, gentler validators

If you would like to replace Archetypes' default validators with some code
that produces better error messages and that is a little more forgiving of
imperfectly formatted data, you can use the code that follows.

Would anybody object to my replacing the RegExValidator in
validation.validators.validator.py and the default validators in
validation.validators.__init__.py with the code below?

Geoff Davis
http://www.geoffdavis.net



# code to install custom validators -- add this to MyProduct.__init__.py
from Products.MyProduct.CustomValidators import install
install()


# add this in your product as CustomValidators.py
import re
from Products.validation import validation
from Products.validation.interfaces import ivalidator
from Products.validation.validators.validator import ignoreRE

class RegexValidator:
    __implements__ = (ivalidator,)

    def __init__(self, name, errmsg='Validation Failed(%(name)s): on
%(value)s', *args):
        self.name = name
        self.errmsg = errmsg
        self.regex = []
        for r in args:
            self.regex.append(re.compile(r))

    def __call__(self, value, *args, **kwargs):
        ignore = kwargs.get('ignore', None)
        if ignore:
            value = ignoreRE(value, ignore)

        for r in self.regex:
            m = r.match(value)
            if not m:
                return self.errmsg % {'name':self.name, 'value':value}
        return 1


_validators = [
    RegexValidator('isDecimal', 'Please enter a decimal number',

r'^\s*([+-]?)(?=\d|\.\d)\d*(\.\d*)?([Ee]([+-]?\d+))?\s*$'),
    RegexValidator('isInt', 'Please enter an integer',
r'^\s*([+-])?\d+\s*$'),
#    RegexValidator('isPrintable', r'[a-zA-Z0-9\s]+$'),
#    RegexValidator('isSSN', r'^\d{9}$'),
    RegexValidator('isUSPhoneNumber', 'Please enter a phone number
XXX-XXX-XXXX', r'\s*1?\s*[\(]?\s*\d{3}\s*[\)/.-]?\s*\d{3}\s*[\)/.-]?\d{4}'),
#    RegexValidator('isInternationalPhoneNumber', r'^\d+$'),
#    RegexValidator('isZipCode', r'^(\d{5}|\d{9})$'),
#    RegexValidator('isURL', r'(ht|f)tps?://[^\s\r\n]+'),
    RegexValidator('isEmail', 'Please enter a complete e-mail address',
"^\s*([0-9a-zA-Z_&.+-]+!)*[0-9a-zA-Z_&.+-]+@(([0-9a-z]([0-9a-z-]*[0-9a-z])?\
.)+[a-z]{2,6}|([0-9]{1,3}\.){3}[0-9]{1,3})\s*$"),
    ]


def install():
    import sys
    sys.stdout.write('installing validators\n')
    for v in _validators:
        validation.register(v)





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