plone.app.discussion/plone/app/discussion/browser/validator.py

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# -*- coding: utf-8 -*-
"""Captcha validator, see captcha.txt for design notes.
"""
from Acquisition import aq_inner
from plone.app.discussion.interfaces import ICaptcha
from plone.app.discussion.interfaces import IDiscussionLayer
from plone.app.discussion.interfaces import IDiscussionSettings
from plone.registry.interfaces import IRegistry
from z3c.form import validator
from z3c.form.interfaces import IValidator
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from zope.component import adapter
from zope.component import getMultiAdapter
from zope.component import queryUtility
from zope.interface import implementer
from zope.interface import Interface
from zope.schema.interfaces import IField
try:
from collective.z3cform.norobots.validator import WrongNorobotsAnswer
except ImportError:
pass
try:
from plone.formwidget.captcha.validator import WrongCaptchaCode
except ImportError:
pass
try:
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from plone.formwidget.recaptcha.validator import WrongCaptchaCode # noqa
except ImportError:
pass
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@adapter(Interface, IDiscussionLayer, Interface, IField, Interface)
@implementer(IValidator)
class CaptchaValidator(validator.SimpleFieldValidator):
# Object, Request, Form, Field, Widget,
# We adapt the CaptchaValidator class to all form fields (IField)
def validate(self, value):
super(CaptchaValidator, self).validate(value)
registry = queryUtility(IRegistry)
settings = registry.forInterface(IDiscussionSettings, check=False)
if settings.captcha in ('captcha', 'recaptcha', 'norobots'):
captcha = getMultiAdapter((aq_inner(self.context), self.request),
name=settings.captcha)
if not captcha.verify(input=value):
if settings.captcha == 'norobots':
raise WrongNorobotsAnswer
else:
raise WrongCaptchaCode
else:
return True
# Register Captcha validator for the Captcha field in the ICaptcha Form
validator.WidgetValidatorDiscriminators(CaptchaValidator,
field=ICaptcha['captcha'])