new: soft delete object in MISPEvent

Fix #706

pymisp/mispevent.py

@@ -751,7 +751,7 @@ class MISPObject(AbstractMISP):
             pass
 
     def delete(self):
-        """Mark the attribute as deleted (soft delete)"""
+        """Mark the object as deleted (soft delete)"""
         self.deleted = True
 
     @property
@@ -1553,6 +1553,19 @@ class MISPEvent(AbstractMISP):
         self.edited = True
         return misp_obj
 
+    def delete_object(self, object_id: str):
+        """Delete an object
+
+        :param object_id: ID or UUID
+        """
+        for o in self.objects:
+            if ((hasattr(o, 'id') and o.id == object_id)
+                    or (hasattr(o, 'uuid') and o.uuid == object_id)):
+                o.delete()
+                break
+        else:
+            raise PyMISPError('No object with UUID/ID {} found.'.format(object_id))
+
     def run_expansions(self):
         for index, attribute in enumerate(self.attributes):
             if 'expand' not in attribute:

tests/testlive_comprehensive.py

@@ -1255,6 +1255,14 @@ class TestComprehensive(unittest.TestCase):
                     response = self.admin_misp_connector.delete_tag(t)
                     self.assertEqual(response['message'], 'Tag deleted.')
 
+            # Test soft delete object
+            second.delete_object(ip_dom.uuid)
+            self.assertTrue(second.objects[-1].deleted)
+            second = self.user_misp_connector.update_event(second)
+            self.assertFalse(second.objects)
+            second = self.user_misp_connector.get_event(second, deleted=True)
+            self.assertTrue(second.objects[-1].deleted)
+
             # Test delete object
             r = self.user_misp_connector.delete_object(second.objects[0])
             self.assertEqual(r['message'], 'Object deleted', r)