#
# RegexField for Formulator
#
# Copyright (c) 2003 Philipp von Weitershausen
#                    <philipp@weitershausen.de>
#

import os, re
from Products.Formulator.DummyField import fields
from Products.Formulator.Field import ZMIField
from Products.Formulator.FieldRegistry import FieldRegistry
from Products.Formulator.Validator import StringBaseValidator
from Products.Formulator import Widget

class RegexValidator(StringBaseValidator):

    property_names = StringBaseValidator.property_names + \
                     ['regex']

    regex = fields.StringField(
        'regex',
        title="Regular Expression",
        required=1,
        default="",
        description="Enter a regular expression here"
        )

    message_names = StringBaseValidator.message_names + \
                    ['regex_not_matched']

    regex_not_matched = "The entered value did not match the regular " \
                          "expression."

    def validate(self, field, key, REQUEST):
        value = REQUEST.get(key, "")
        srematch = re.match(field.get_value('regex'), value)
        if srematch is None:
            self.raise_error('regex_not_matched', field)
        return value

RegexValidatorInstance = RegexValidator()

class RegexField(ZMIField):
    meta_type = "RegexField"
    
    widget = Widget.TextWidgetInstance
    validator = RegexValidatorInstance

path = os.path.dirname(__file__)
iconpath = os.path.join(path, "RegexField.gif")
FieldRegistry.registerField(RegexField, icon=iconpath)