#86 Revocation edit

* adds support for revocation edit
    * revocation document files will be replaced on an edit

intervention/models/intervention.py

@@ -8,6 +8,8 @@ Created on: 15.11.21
 import shutil
 
 from django.contrib import messages
+from django.core.exceptions import ObjectDoesNotExist
+from django.db.models.fields.files import FieldFile
 from django.urls import reverse
 from django.utils import timezone
 
@@ -202,6 +204,41 @@ class Intervention(BaseObject, ShareableObjectMixin, RecordableObjectMixin, Chec
                 )
         return revocation
 
+    def edit_revocation(self, form):
+        """ Updates a revocation of the intervention
+
+        Args:
+            form (EditRevocationModalForm): The form holding the data
+
+        Returns:
+
+        """
+        form_data = form.cleaned_data
+        file = form_data.get("file", None)
+
+        revocation = form.revocation
+        revocation.date = form_data.get("date", None)
+        revocation.comment = form_data.get("comment", None)
+
+        with transaction.atomic():
+            try:
+                revocation.document.date_of_creation = revocation.date
+                revocation.document.comment = revocation.comment
+                if not isinstance(file, FieldFile):
+                    revocation.document.replace_file(file)
+                revocation.document.save()
+            except ObjectDoesNotExist:
+                revocation.document = RevocationDocument.objects.create(
+                    title="revocation_of_{}".format(self.identifier),
+                    date_of_creation=revocation.date,
+                    comment=revocation.comment,
+                    file=file,
+                    instance=revocation
+                )
+            revocation.save()
+
+        return revocation
+
     def remove_revocation(self, form):
         """ Removes a revocation from the intervention