misc: send mail post date in submission context (#10459)

welco/qualif/models.py

@@ -36,10 +36,10 @@ class Association(models.Model):
         context = {}
         if self.source.contact_id:
             context['user_id'] = self.source.contact_id
-        context['channel'] = self.source._meta.app_label
         context['summary_url'] = request.build_absolute_uri(
                 reverse('wcs-summary', kwargs={'source_type': self.source_type_id,
                                                'source_pk': self.source_pk}))
+        context.update(self.source.get_source_context(request))
         self.formdata_id = push_wcs_formdata(request, self.formdef_reference, context)
         self.save()
 

welco/sources/mail/models.py

@@ -95,6 +95,12 @@ class Mail(models.Model):
             return '-'
         return categories.keys()
 
+    def get_source_context(self, request):
+        return {
+            'channel': 'mail',
+            'post_date': self.post_date and self.post_date.strftime('%Y-%m-%d'),
+        }
+
 
 @receiver(post_save, sender=Mail)
 def create_thumbnail(sender, instance, created, **kwargs):