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"""
A base contact form for allowing users to send email messages through
a web interface.
"""
import os
from django import forms
from django.conf import settings
from django.contrib.sites.shortcuts import get_current_site
from django.utils.translation import ugettext_lazy as _
from django.core.mail import send_mail
from django.template import loader
class ContactForm(forms.Form):
"""
The base contact form class from which all contact form classes
should inherit.
"""
name = forms.CharField(max_length=100,
label=_(u'Your name'))
email = forms.EmailField(max_length=200,
label=_(u'Your email address'))
body = forms.CharField(widget=forms.Textarea,
label=_(u'Your message'))
from_email = settings.DEFAULT_FROM_EMAIL
recipient_list = [mail_tuple[1] for mail_tuple in settings.MANAGERS]
subject_template_name = "contact_form/contact_form_subject.txt"
template_name = 'contact_form/contact_form.txt'
def __init__(self, data=None, files=None, request=None,
recipient_list=None, *args, **kwargs):
if request is None:
raise TypeError("Keyword argument 'request' must be supplied")
self.request = request
if recipient_list is not None:
self.recipient_list = recipient_list
super(ContactForm, self).__init__(data=data, files=files,
*args, **kwargs)
def message(self):
"""
Render the body of the message to a string.
"""
template_name = self.template_name() if \
callable(self.template_name) \
else self.template_name
return loader.render_to_string(
template_name, self.get_context(), request=self.request
)
def subject(self):
"""
Render the subject of the message to a string.
"""
template_name = self.subject_template_name() if \
callable(self.subject_template_name) \
else self.subject_template_name
subject = loader.render_to_string(
template_name, self.get_context(), request=self.request
)
return ''.join(subject.splitlines())
def get_context(self):
"""
Return the context used to render the templates for the email
subject and body.
By default, this context includes:
* All of the validated values in the form, as variables of the
same names as their fields.
* The current ``Site`` object, as the variable ``site``.
* Any additional variables added by context processors (this
will be a ``RequestContext``).
"""
if not self.is_valid():
raise ValueError(
"Cannot generate Context from invalid contact form"
)
return dict(self.cleaned_data, site=get_current_site(self.request))
def get_message_dict(self):
"""
Generate the various parts of the message and return them in a
dictionary, suitable for passing directly as keyword arguments
to ``django.core.mail.send_mail()``.
By default, the following values are returned:
* ``from_email``
* ``message``
* ``recipient_list``
* ``subject``
"""
if not self.is_valid():
raise ValueError(
"Message cannot be sent from invalid contact form"
)
message_dict = {}
for message_part in ('from_email', 'message',
'recipient_list', 'subject'):
attr = getattr(self, message_part)
message_dict[message_part] = attr() if callable(attr) else attr
return message_dict
def save(self, fail_silently=False):
"""
Build and send the email message.
"""
send_mail(fail_silently=fail_silently, **self.get_message_dict())
class AkismetContactForm(ContactForm):
"""
Contact form which doesn't add any extra fields, but does add an
Akismet spam check to the validation routine.
Requires the Python Akismet library, and two configuration
parameters: an Akismet API key and the URL the key is associated
with. These can be supplied either as the settings AKISMET_API_KEY
and AKISMET_BLOG_URL, or the environment variables
PYTHON_AKISMET_API_KEY and PYTHON_AKISMET_BLOG_URL.
"""
SPAM_MESSAGE = _(u"Your message was classified as spam.")
def _is_unit_test(self):
"""
Determine if we're in a test run.
During test runs, Akismet should be passed the ``is_test``
argument to ensure no effect on training corpus.
django-contact-form's tox.ini will set the environment
variable ``CI`` to indicate this, as will most online
continuous-integration systems.
"""
return os.getenv('CI') == 'true'
def clean_body(self):
if 'body' in self.cleaned_data:
from akismet import Akismet
akismet_api = Akismet(
key=getattr(settings, 'AKISMET_API_KEY', None),
blog_url=getattr(settings, 'AKISMET_BLOG_URL', None)
)
akismet_kwargs = {
'user_ip': self.request.META['REMOTE_ADDR'],
'user_agent': self.request.META.get('HTTP_USER_AGENT'),
'comment_author': self.cleaned_data.get('name'),
'comment_author_email': self.cleaned_data.get('email'),
'comment_content': self.cleaned_data['body'],
'comment_type': 'contact-form',
}
if self._is_unit_test():
akismet_kwargs['is_test'] = 1
if akismet_api.comment_check(**akismet_kwargs):
raise forms.ValidationError(
self.SPAM_MESSAGE
)
return self.cleaned_data['body']
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