Add a kind of trashbin for registrations and participants

dav_registration/models.py

@@ -72,8 +72,6 @@ class Registration(models.Model):
                                                   verbose_name=_('Einwilligung zur Datenspeicherung'))
     purge_at = models.DateTimeField(_('Zeitpunkt der Datenlöschung'))
 
-    answered = models.BooleanField(_('Durch Tourleitung beantwortet'), default=False)
-
     @staticmethod
     def pk2hexstr(pk):
         return hex(pk * 113)[2:]  # 113 has no meaning, but it produce nice looking hex codes.
@@ -151,9 +149,29 @@ Anmerkung:
         super(Registration, self).save(**kwargs)
 
         if creating:
+            status = RegistrationStatus(registration=self)
+            status.save()
             logger.info('Registration stored: %s', self)
             signals.registration_created.send(sender=self.__class__, registration=self)
 
+    def answered(self, accepted):
+        if accepted is not True and accepted is not False:
+            raise ValueError('boolean parameter expected')
+        if hasattr(self, 'status'):
+            status = self.status
+        else:
+            status = RegistrationStatus(registration=self)
+
+        status.accepted = accepted
+        status.answered = True
+        status.save()
+
+    def accepted(self):
+        return self.answered(accepted=True)
+
+    def rejected(self):
+        return self.answered(accepted=False)
+
     @classmethod
     def calc_purge_at(cls, event):
         if event.alt_last_day:
@@ -179,3 +197,29 @@ Anmerkung:
             purge_date = july_nextyear
 
         return timezone.make_aware(datetime.datetime.combine(purge_date, midnight))
+
+
+@python_2_unicode_compatible
+class RegistrationStatus(models.Model):
+    registration = models.OneToOneField(Registration, on_delete=models.CASCADE, related_name='status')
+    updated_at = models.DateTimeField(auto_now=True)
+    answered = models.BooleanField(_('Durch Tourleitung beantwortet'), default=False)
+    accepted = models.NullBooleanField(_('Zusage erteilt'))
+
+    class Meta:
+        verbose_name = _('Anmeldungsstatus')
+        verbose_name_plural = _('Anmeldungsstati')
+        ordering = ['updated_at']
+
+    def __str__(self):
+        return '{} (Updated: {})'.format(self.registration, self.updated_at.strftime('%d.%m.%Y %H:%M:%S'))
+
+    def clean(self):
+        if self.answered and self.accepted is None:
+            raise ValidationError({'accepted': 'if answered is true, accepted must not be none'})
+        elif not self.answered and self.accepted is not None:
+            raise ValidationError({'answered': 'if answered is false, accepted must be none'})
+
+    def save(self, **kwargs):
+        self.full_clean()
+        super(RegistrationStatus, self).save(**kwargs)