voucher validity

Vouchers expiry after 90 days. 7 days before expiry date there is a notification about it.

Closes #212 (closed)

smash/web/forms/voucher_forms.py

@@ -57,28 +57,27 @@ class VoucherForm(ModelForm):
         if instance and instance.pk:
             self.fields['voucher_type'].widget.attrs['readonly'] = True
             self.fields['usage_partner'].queryset = Worker.get_workers_by_worker_type(WORKER_VOUCHER_PARTNER).filter(
-                voucher_types = instance.voucher_type)
+                voucher_types=instance.voucher_type)
 
             if instance.status != VOUCHER_STATUS_NEW:
                 self.fields['status'].widget.attrs['readonly'] = True
                 self.fields['feedback'].widget.attrs['readonly'] = True
                 self.fields['usage_partner'].widget.attrs['readonly'] = True
 
-    def clean(self):
-        if self.cleaned_data["status"] == VOUCHER_STATUS_USED and not self.cleaned_data["usage_partner"]:
-            self.add_error('usage_partner', "Partner must be defined for used voucher")
-        if self.cleaned_data["status"] != VOUCHER_STATUS_USED and self.cleaned_data["usage_partner"]:
-            self.add_error('status', "Status must be used for voucher with defined partner")
-
     def save(self, commit=True):
         instance = super(VoucherForm, self).save(commit=False)
         if not instance.id:
             instance.issue_date = timezone.now()
             instance.expiry_date = instance.issue_date + datetime.timedelta(days=92)
-            max_id = str(0).zfill(5)
+            max_id = str(1).zfill(5)
             if Voucher.objects.all().count() > 0:
-                max_id = str(Voucher.objects.latest('id').id).zfill(5)
-            instance.number = max_id + VerhoeffAlgorithm.calculate_verhoeff_check_sum(max_id)
+                max_id = str(Voucher.objects.latest('id').id + 1).zfill(5)
+            # number in format  {ND_NUMBER}-{DATE}-{VOUCHER_TYPE_CODE}-{VOUCHER_TYPE}-{SEQ_NUMBER}{CHECKSUM}
+            instance.number = instance.study_subject.nd_number + "-" + \
+                              datetime.datetime.now().strftime("%Y%m%d") + "-" + \
+                              instance.voucher_type.code + "-" + \
+                              instance.usage_partner.voucher_partner_code + "-" + \
+                              max_id + VerhoeffAlgorithm.calculate_verhoeff_check_sum(max_id)
         if instance.status == VOUCHER_STATUS_USED and not instance.use_date:
             instance.use_date = timezone.now()