virts-2891 - Planner parsing error checking

app/objects/secondclass/c_link.py

@@ -13,6 +13,7 @@
 from app.objects.secondclass.c_relationship import RelationshipSchema
 from app.objects.secondclass.c_visibility import Visibility, VisibilitySchema
 from app.utility.base_object import BaseObject
+from app.utility.base_parser import PARSER_SIGNALS_FAILURE
 from app.utility.base_service import BaseService
 
 
@@ -190,8 +191,15 @@ async def parse(self, operation, result):
             source_facts = operation.source.facts if operation else []
             try:
                 relationships = await self._parse_link_result(result, parser, source_facts)
+
+                if len(relationships) > 0 and relationships[0] == PARSER_SIGNALS_FAILURE:
+                    logging.getLogger('link').debug(f'link {self.id} (ability id={self.ability.ability_id}) encountered '
+                                                    f'an error during execution, which was caught during parsing.')
+                    self.status = self.states['ERROR']
+                    relationships = []  # we didn't actually get anything out of this, so let's reset
+                else:
+                    await self._create_relationships(relationships, operation)
                 await update_scores(operation, increment=len(relationships), used=self.used, facts=self.facts)
-                await self._create_relationships(relationships, operation)
             except Exception as e:
                 logging.getLogger('link').debug('error in %s while parsing ability %s: %s'
                                                 % (parser.module, self.ability.ability_id, e))

app/utility/base_parser.py

@@ -1,6 +1,8 @@
 import json
 import re
 
+PARSER_SIGNALS_FAILURE = 418  # Universal Teapot error code
+
 
 class BaseParser: