contact/forms.py

   1 # -*- coding: utf-8 -*-
   2 import os
   3
   4 from django.contrib.sites.models import Site
   5 from django.core.exceptions import ValidationError
   6 from django.core.files.uploadedfile import UploadedFile
   7 from django.core.mail import send_mail, mail_managers
   8 from django.core.validators import validate_email
   9 from django import forms
  10 from django.db.models.fields.files import FieldFile
  11 from django.template.loader import render_to_string
  12 from django.template import RequestContext
  13 from django.utils.translation import ugettext_lazy as _
  14
  15 from . import mailing
  16
  17
  18 contact_forms = {}
  19 update_forms = {}
  20 admin_list_width = 0
  21
  22
  23 class ContactFormMeta(forms.Form.__class__):
  24     def __new__(cls, name, bases, attrs):
  25         global admin_list_width
  26         model = super(ContactFormMeta, cls).__new__(cls, name, bases, attrs)
  27         if model.form_tag:
  28             if model.form_type == 'create':
  29                 assert model.form_tag not in contact_forms, 'Duplicate form_tag.'
  30                 if model.admin_list:
  31                     admin_list_width = max(admin_list_width, len(model.admin_list))
  32                 contact_forms[model.form_tag] = model
  33             elif model.form_type == 'update':
  34                 assert model.form_tag not in update_forms, 'Duplicate form_tag.'
  35                 update_forms[model.form_tag] = model
  36         return model
  37
  38
  39 class ContactForm(forms.Form):
  40     """Subclass and define some fields."""
  41     __metaclass__ = ContactFormMeta
  42
  43     form_tag = None
  44     form_type = 'create'
  45     updatable = False
  46     old_form_tags = []
  47     form_title = _('Contact form')
  48     submit_label = _('Submit')
  49     admin_list = None
  50     result_page = False
  51     mailing_field = None
  52     mailing = False
  53     data_processing = None
  54     form_formsets = {}
  55
  56     disabled = False
  57     disabled_template = None
  58
  59     required_css_class = 'required'
  60     contact = NotImplemented
  61
  62     def __init__(self, data=None, files=None, *args, **kwargs):
  63         self.instance = kwargs.pop('instance', None)
  64         if self.instance and (data is not None or files is not None):
  65             for attachment in self.instance.attachment_set.all():
  66                 if attachment.tag not in files:
  67                     files[attachment.tag] = attachment.file
  68         super(ContactForm, self).__init__(data, files, *args, **kwargs)
  69         if not self.is_bound and self.instance:
  70             self.fields['contact'].initial = self.instance.contact
  71             body = self.instance.body
  72             for field, value in body.iteritems():
  73                 if field in self.fields:
  74                     self.fields[field].initial = value
  75             for attachment in self.instance.attachment_set.all():
  76                 self.fields[attachment.tag].initial = attachment
  77
  78     def get_dictionary(self, contact):
  79         site = Site.objects.get_current()
  80         return {
  81             'form_tag': self.form_tag,
  82             'site_name': getattr(self, 'site_name', site.name),
  83             'site_domain': getattr(self, 'site_domain', site.domain),
  84             'contact': contact,
  85         }
  86
  87     @classmethod
  88     def is_disabled(cls):
  89         # end_time = localtime_to_utc(datetime(*cls.ends_on)) if cls.ends_on else None
  90         # expired = end_time and end_time < timezone.now()
  91         return cls.disabled  # or expired
  92
  93     def formset_initial(self, prefix):
  94         if not self.instance:
  95             return None
  96         return self.instance.body.get(prefix)
  97
  98     def get_formsets(self, request=None):
  99         request_data = {'data': request.POST, 'files': request.FILES} if request else {}
 100         kwargs_instance = dict(request_data)
 101         kwargs_instance['instance'] = self.instance
 102         formsets = {}
 103         for prefix, formset_class in self.form_formsets.iteritems():
 104             if getattr(formset_class, 'takes_instance', False):
 105                 kwargs = kwargs_instance
 106             else:
 107                 kwargs = request_data
 108             formsets[prefix] = formset_class(
 109                 prefix=prefix, initial=self.formset_initial(prefix), **kwargs)
 110         return formsets
 111
 112     def save(self, request, formsets=None):
 113         from .models import Attachment, Contact
 114         body = {}
 115         for name, value in self.cleaned_data.items():
 116             if not isinstance(value, UploadedFile) and not isinstance(value, FieldFile) and name != 'contact':
 117                 body[name] = value
 118
 119         for formset in formsets or []:
 120             for f in formset.forms:
 121                 sub_body = {}
 122                 for name, value in f.cleaned_data.items():
 123                     if not isinstance(value, UploadedFile):
 124                         sub_body[name] = value
 125                 if sub_body:
 126                     body.setdefault(f.form_tag, []).append(sub_body)
 127
 128         if self.instance:
 129             contact = self.instance
 130             contact.body = body
 131             email_changed = contact.contact != self.cleaned_data['contact']
 132             contact.contact = self.cleaned_data['contact']
 133             assert contact.form_tag == self.form_tag
 134             contact.save()
 135         else:
 136             contact = Contact.objects.create(
 137                 body=body,
 138                 ip=request.META['REMOTE_ADDR'],
 139                 contact=self.cleaned_data['contact'],
 140                 form_tag=self.form_tag)
 141             contact.generate_key()
 142             contact.save()
 143             email_changed = True
 144         for name, value in self.cleaned_data.items():
 145             if isinstance(value, UploadedFile):
 146                 for attachment in Attachment.objects.filter(contact=contact, tag=name):
 147                     os.remove(attachment.file.path)
 148                     attachment.delete()
 149                 attachment = Attachment(contact=contact, tag=name)
 150                 attachment.file.save(value.name, value)
 151                 attachment.save()
 152
 153         site = Site.objects.get_current()
 154         dictionary = self.get_dictionary(contact)
 155         context = RequestContext(request)
 156         mail_managers_subject = render_to_string([
 157                 'contact/%s/mail_managers_subject.txt' % self.form_tag,
 158                 'contact/mail_managers_subject.txt',
 159             ], dictionary, context).strip()
 160         mail_managers_body = render_to_string([
 161                 'contact/%s/mail_managers_body.txt' % self.form_tag,
 162                 'contact/mail_managers_body.txt',
 163             ], dictionary, context)
 164         mail_managers(mail_managers_subject, mail_managers_body, fail_silently=True)
 165
 166         try:
 167             validate_email(contact.contact)
 168         except ValidationError:
 169             pass
 170         else:
 171             if not self.instance:
 172                 mail_subject = render_to_string([
 173                         'contact/%s/mail_subject.txt' % self.form_tag,
 174                         'contact/mail_subject.txt',
 175                     ], dictionary, context).strip()
 176                 if self.result_page:
 177                     mail_body = render_to_string(
 178                         'contact/%s/results_email.txt' % contact.form_tag,
 179                         {
 180                             'contact': contact,
 181                             'results': self.results(contact),
 182                         }, context)
 183                 else:
 184                     mail_body = render_to_string([
 185                             'contact/%s/mail_body.txt' % self.form_tag,
 186                             'contact/mail_body.txt',
 187                         ], dictionary, context)
 188                 send_mail(mail_subject, mail_body, 'no-reply@%s' % site.domain, [contact.contact], fail_silently=True)
 189             if email_changed and (self.mailing or (self.mailing_field and self.cleaned_data[self.mailing_field])):
 190                 mailing.subscribe(contact.contact)
 191
 192         return contact