contact/admin.py

   1 # -*- coding: utf-8 -*-
   2 import csv
   3
   4 from django.contrib import admin
   5 from django.utils.translation import ugettext as _
   6 from django.utils.safestring import mark_safe
   7 from django.conf.urls import patterns, url
   8 from django.http import HttpResponse, Http404
   9
  10 from .forms import contact_forms, admin_list_width
  11 from .models import Contact
  12
  13
  14 class ContactAdminMeta(admin.ModelAdmin.__class__):
  15     def __getattr__(cls, name):
  16         if name.startswith('admin_list_'):
  17             return lambda self: ""
  18         raise AttributeError(name)
  19
  20
  21 class ContactAdmin(admin.ModelAdmin):
  22     __metaclass__ = ContactAdminMeta
  23     date_hierarchy = 'created_at'
  24     list_display = ['created_at', 'contact', 'form_tag'] + \
  25         ["admin_list_%d" % i for i in range(admin_list_width)]
  26     fields = ['form_tag', 'created_at', 'contact', 'ip']
  27     readonly_fields = ['form_tag', 'created_at', 'contact', 'ip']
  28     list_filter = ['form_tag']
  29
  30     @staticmethod
  31     def admin_list(obj, nr):
  32         try:
  33             field_name = contact_forms[obj.form_tag].admin_list[nr]
  34         except BaseException:
  35             return ''
  36         else:
  37             return Contact.pretty_print(obj.body.get(field_name, ''), for_html=True)
  38
  39     def __getattr__(self, name):
  40         if name.startswith('admin_list_'):
  41             nr = int(name[len('admin_list_'):])
  42             return lambda obj: self.admin_list(obj, nr)
  43         raise AttributeError(name)
  44
  45     def change_view(self, request, object_id, form_url='', extra_context=None):
  46         if object_id:
  47             try:
  48                 instance = Contact.objects.get(pk=object_id)
  49                 assert isinstance(instance.body, dict)
  50             except (Contact.DoesNotExist, AssertionError):
  51                 pass
  52             else:
  53                 # Create readonly fields from the body JSON.
  54                 body_fields = ['body__%s' % k for k in instance.body.keys()]
  55                 attachments = list(instance.attachment_set.all())
  56                 body_fields += ['body__%s' % a.tag for a in attachments]
  57                 self.readonly_fields.extend(body_fields)
  58
  59                 # Find the original form.
  60                 try:
  61                     orig_fields = contact_forms[instance.form_tag]().fields
  62                 except KeyError:
  63                     orig_fields = {}
  64
  65                 # Try to preserve the original order.
  66                 admin_fields = []
  67                 orig_keys = list(orig_fields.keys())
  68                 while orig_keys:
  69                     key = orig_keys.pop(0)
  70                     key = "body__%s" % key
  71                     if key in body_fields:
  72                         admin_fields.append(key)
  73                         body_fields.remove(key)
  74                 admin_fields.extend(body_fields)
  75
  76                 self.fieldsets = [
  77                     (None, {'fields': self.fields}),
  78                     (_('Body'), {'fields': admin_fields}),
  79                 ]
  80
  81                 # Create field getters for fields and attachments.
  82                 for k, v in instance.body.items():
  83                     f = (lambda v: lambda self: v)(Contact.pretty_print(v, for_html=True))
  84                     f.short_description = orig_fields[k].label if k in orig_fields else _(k)
  85                     setattr(self, "body__%s" % k, f)
  86
  87                 download_link = "<a href='%(url)s'>%(url)s</a>"
  88                 for attachment in attachments:
  89                     k = attachment.tag
  90                     link = mark_safe(download_link % {
  91                             'url': attachment.get_absolute_url()})
  92                     f = (lambda v: lambda self: v)(link)
  93                     f.short_description = orig_fields[k].label if k in orig_fields else _(k)
  94                     setattr(self, "body__%s" % k, f)
  95         return super(ContactAdmin, self).change_view(
  96             request, object_id, form_url=form_url, extra_context=extra_context)
  97
  98     def changelist_view(self, request, extra_context=None):
  99         context = dict()
 100         if 'form_tag' in request.GET:
 101             form = contact_forms.get(request.GET['form_tag'])
 102             context['extract_types'] = [
 103                 {'slug': 'all', 'label': _('all')},
 104                 {'slug': 'contacts', 'label': _('contacts')}]
 105             context['extract_types'] += [type for type in getattr(form, 'extract_types', [])]
 106         return super(ContactAdmin, self).changelist_view(request, extra_context=context)
 107
 108     def get_urls(self):
 109         # urls = super(ContactAdmin, self).get_urls()
 110         return patterns(
 111             '',
 112             url(r'^extract/(?P<form_tag>[\w-]+)/(?P<extract_type_slug>[\w-]+)/$',
 113                 self.admin_site.admin_view(extract_view), name='contact_extract')
 114         ) + super(ContactAdmin, self).get_urls()
 115
 116
 117 def extract_view(request, form_tag, extract_type_slug):
 118     contacts_by_spec = dict()
 119     form = contact_forms.get(form_tag)
 120     if form is None and extract_type_slug not in ('contacts', 'all'):
 121         raise Http404
 122
 123     q = Contact.objects.filter(form_tag=form_tag)
 124     at_year = request.GET.get('created_at__year')
 125     at_month = request.GET.get('created_at__month')
 126     if at_year:
 127         q = q.filter(created_at__year=at_year)
 128         if at_month:
 129             q = q.filter(created_at__month=at_month)
 130
 131     # Segregate contacts by body key sets
 132     for contact in q.all():
 133         if extract_type_slug == 'contacts':
 134             keys = ['contact']
 135         elif extract_type_slug == 'all':
 136             keys = contact.body.keys() + ['contact']
 137         else:
 138             keys = form.get_extract_fields(contact, extract_type_slug)
 139         contacts_by_spec.setdefault(tuple(keys), []).append(contact)
 140
 141     response = HttpResponse(content_type='text/csv')
 142     csv_writer = csv.writer(response)
 143
 144     # Generate list for each body key set
 145     for keys, contacts in contacts_by_spec.items():
 146         csv_writer.writerow(keys)
 147         for contact in contacts:
 148             if extract_type_slug == 'contacts':
 149                 records = [dict(contact=contact.contact)]
 150             elif extract_type_slug == 'all':
 151                 records = [dict(contact=contact.contact, **contact.body)]
 152             else:
 153                 records = form.get_extract_records(keys, contact, extract_type_slug)
 154
 155             for record in records:
 156                 for key in keys:
 157                     if key not in record:
 158                         record[key] = ''
 159                 csv_writer.writerow([record[key].encode('utf-8') for key in keys])
 160         csv_writer.writerow([])
 161
 162     response['Content-Disposition'] = 'attachment; filename="kontakt.csv"'
 163     return response
 164
 165 admin.site.register(Contact, ContactAdmin)