contact/forms.py

   1 # -*- coding: utf-8 -*-
   2 from datetime import datetime
   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 mail_managers
   8 from django.core.validators import validate_email
   9 from django import forms
  10 from django.template.loader import render_to_string
  11 from django.template import RequestContext
  12 from django.utils.translation import ugettext_lazy as _
  13 from django.utils import timezone
  14
  15 from edumed.utils import localtime_to_utc
  16 from . import mailing
  17
  18
  19 contact_forms = {}
  20 update_forms = {}
  21 admin_list_width = 0
  22
  23
  24 class ContactFormMeta(forms.Form.__class__):
  25     def __new__(cls, name, bases, attrs):
  26         global admin_list_width
  27         model = super(ContactFormMeta, cls).__new__(cls, name, bases, attrs)
  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     old_form_tags = []
  46     form_title = _('Contact form')
  47     submit_label = _('Submit')
  48     admin_list = None
  49     result_page = False
  50     mailing_field = None
  51     form_formsets = {}
  52
  53     required_css_class = 'required'
  54     contact = NotImplemented
  55     data_processing = None
  56
  57     disabled = False
  58     ends_on = None
  59
  60     confirmation_class = NotImplemented
  61
  62     def __init__(self, *args, **kwargs):
  63         self.instance = kwargs.pop('instance', None)
  64         super(ContactForm, self).__init__(*args, **kwargs)
  65         if not self.is_bound and self.instance:
  66             # files are omitted (not necessary for now)
  67             self.fields['contact'].initial = self.instance.contact
  68             body = self.instance.body
  69             for field, value in body.iteritems():
  70                 if field in self.fields:
  71                     self.fields[field].initial = value
  72
  73     @classmethod
  74     def is_disabled(cls):
  75         end_time = localtime_to_utc(datetime(*cls.ends_on)) if cls.ends_on else None
  76         expired = end_time and end_time < timezone.now()
  77         return cls.disabled or expired
  78
  79     def formset_initial(self, prefix):
  80         if not self.instance:
  81             return None
  82         return self.instance.body.get(prefix)
  83
  84     def get_formsets(self, request=None):
  85         request_data = {'data': request.POST, 'files': request.FILES} if request else {}
  86         kwargs_instance = dict(request_data)
  87         kwargs_instance['instance'] = self.instance
  88         formsets = {}
  89         for prefix, formset_class in self.form_formsets.iteritems():
  90             if getattr(formset_class, 'takes_instance', False):
  91                 kwargs = kwargs_instance
  92             else:
  93                 kwargs = request_data
  94             formsets[prefix] = formset_class(
  95                 prefix=prefix, initial=self.formset_initial(prefix), **kwargs)
  96         return formsets
  97
  98     def get_dictionary(self, contact):
  99         site = Site.objects.get_current()
 100         return {
 101             'form_tag': self.form_tag,
 102             'site_name': getattr(self, 'site_name', site.name),
 103             'site_domain': getattr(self, 'site_domain', site.domain),
 104             'contact': contact,
 105         }
 106
 107     def save(self, request, formsets=None):
 108         from .models import Attachment, Contact
 109         body = {}
 110         for name, value in self.cleaned_data.items():
 111             if not isinstance(value, UploadedFile) and name != 'contact':
 112                 body[name] = value
 113
 114         for formset in formsets or []:
 115             for f in formset.forms:
 116                 sub_body = {}
 117                 for name, value in f.cleaned_data.items():
 118                     if not isinstance(value, UploadedFile):
 119                         sub_body[name] = value
 120                 if sub_body:
 121                     body.setdefault(f.form_tag, []).append(sub_body)
 122
 123         if self.instance:
 124             contact = self.instance
 125             contact.body = body
 126             email_changed = contact.contact != self.cleaned_data['contact']
 127             contact.contact = self.cleaned_data['contact']
 128             assert contact.form_tag == self.form_tag
 129             contact.save()
 130         else:
 131             contact = Contact.objects.create(
 132                 body=body,
 133                 ip=request.META['REMOTE_ADDR'],
 134                 contact=self.cleaned_data['contact'],
 135                 form_tag=self.form_tag)
 136             email_changed = True
 137         # not intended to be used with update forms
 138         for name, value in self.cleaned_data.items():
 139             if isinstance(value, UploadedFile):
 140                 attachment = Attachment(contact=contact, tag=name)
 141                 attachment.file.save(value.name, value)
 142                 attachment.save()
 143
 144         dictionary = self.get_dictionary(contact)
 145         context = RequestContext(request)
 146         mail_managers_subject = render_to_string([
 147                 'contact/%s/mail_managers_subject.txt' % self.form_tag,
 148                 'contact/mail_managers_subject.txt',
 149             ], dictionary, context).strip()
 150         mail_managers_body = render_to_string([
 151                 'contact/%s/mail_managers_body.txt' % self.form_tag,
 152                 'contact/mail_managers_body.txt',
 153             ], dictionary, context)
 154         mail_managers(mail_managers_subject, mail_managers_body, fail_silently=True)
 155
 156         try:
 157             validate_email(contact.contact)
 158         except ValidationError:
 159             pass
 160         else:
 161             if not self.instance:
 162                 contact.send_confirmation(context=context, form=self)
 163             if email_changed and self.mailing_field and self.cleaned_data[self.mailing_field]:
 164                 mailing.subscribe(contact.contact)
 165
 166         return contact