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