plone.app.discussion/plone/app/discussion/browser/captcha.py

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from persistent import Persistent
from Products.CMFCore.utils import getToolByName
from z3c.form import validator
from z3c.form.field import Fields
from zope import interface, schema
from zope.annotation import factory
from zope.component import adapts, provideAdapter, queryUtility
from zope.publisher.interfaces.browser import IDefaultBrowserLayer
from zope.interface import Interface, implements
from plone.registry.interfaces import IRegistry
from plone.z3cform.fieldsets import extensible
from plone.z3cform.fieldsets.interfaces import IFormExtender
from plone.app.discussion.browser.comments import CommentForm
from plone.app.discussion.comment import Comment
from plone.app.discussion.interfaces import IDiscussionSettings, ICaptcha
from plone.app.discussion.browser.validator import CaptchaValidator
HAS_CAPTCHA = False
try:
from plone.formwidget.captcha import CaptchaFieldWidget
HAS_CAPTCHA = True
except ImportError:
pass
HAS_RECAPTCHA = False
try:
from plone.formwidget.recaptcha import ReCaptchaFieldWidget
HAS_RECAPTCHA = True
except ImportError:
pass
class Captcha(Persistent):
interface.implements(ICaptcha)
adapts(Comment)
captcha = u""
Captcha = factory(Captcha)
if HAS_CAPTCHA or HAS_RECAPTCHA:
# Extend the comment form with captcha, if a captcha solution is installed.
class CaptchaExtender(extensible.FormExtender):
adapts(Interface, IDefaultBrowserLayer, CommentForm) # context, request, form
fields = Fields(ICaptcha)
def __init__(self, context, request, form):
self.context = context
self.request = request
self.form = form
registry = queryUtility(IRegistry)
settings = registry.forInterface(IDiscussionSettings)
self.captcha = settings.captcha
portal_membership = getToolByName(self.context, 'portal_membership')
self.isAnon = portal_membership.isAnonymousUser()
def update(self):
if self.captcha != 'disabled' and self.isAnon:
# Add captcha field if captcha is enabled in the registry
self.add(ICaptcha, prefix="")
if HAS_CAPTCHA and self.captcha == 'captcha':
# If Captcha is installed and Captcha is enabled,
# use the CaptchaFieldWidget
self.form.fields['captcha'].widgetFactory = CaptchaFieldWidget
elif HAS_RECAPTCHA and self.captcha == 'recaptcha':
# If ReCaptcha is installed and ReCaptcha is enabled,
# use the ReCaptchaFieldWidget
self.form.fields['captcha'].widgetFactory = ReCaptchaFieldWidget
# Register Captcha validator for the Captcha field in the ICaptcha Form
validator.WidgetValidatorDiscriminators(CaptchaValidator, field=ICaptcha['captcha'])
else:
# This is necessary, otherwise the zcml registration of the CaptchaExtender
# would fail if no captcha solution is installed.
class CaptchaExtender(extensible.FormExtender):
adapts(Interface, IDefaultBrowserLayer, CommentForm)
def __init__(self, context, request, form):
pass
def update(self):
pass