2cc697180c7bf0c3424c615cb9762e3f575b6f9e
[edumed.git] / 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 send_mail, 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         site = Site.objects.get_current()
145         dictionary = self.get_dictionary(contact)
146         context = RequestContext(request)
147         mail_managers_subject = render_to_string([
148                 'contact/%s/mail_managers_subject.txt' % self.form_tag,
149                 'contact/mail_managers_subject.txt', 
150             ], dictionary, context).strip()
151         mail_managers_body = render_to_string([
152                 'contact/%s/mail_managers_body.txt' % self.form_tag,
153                 'contact/mail_managers_body.txt', 
154             ], dictionary, context)
155         mail_managers(mail_managers_subject, mail_managers_body, fail_silently=True)
156
157         try:
158             validate_email(contact.contact)
159         except ValidationError:
160             pass
161         else:
162             if not self.instance:
163                 mail_subject = render_to_string([
164                         'contact/%s/mail_subject.txt' % self.form_tag,
165                         'contact/mail_subject.txt',
166                     ], dictionary, context).strip()
167                 if self.result_page:
168                     mail_body = render_to_string(
169                         'contact/%s/results_email.txt' % contact.form_tag,
170                         {
171                             'contact': contact,
172                             'results': self.results(contact),
173                         }, context)
174                 else:
175                     mail_body = render_to_string([
176                             'contact/%s/mail_body.txt' % self.form_tag,
177                             'contact/mail_body.txt',
178                         ], dictionary, context)
179                 send_mail(mail_subject, mail_body, 'no-reply@%s' % site.domain, [contact.contact], fail_silently=True)
180             if email_changed and self.mailing_field and self.cleaned_data[self.mailing_field]:
181                 mailing.subscribe(contact.contact)
182
183         return contact