Managing concept properties in ConceptEvaluator

evaluators/OneSuccessEvaluator.py

@@ -0,0 +1,41 @@
+from core.builtin_concepts import BuiltinConcepts
+from evaluators.BaseEvaluator import AllReturnValuesEvaluator
+import logging
+
+from parsers.BaseParser import BaseParser
+
+log = logging.getLogger(__name__)
+
+
+class OneSuccessEvaluator(AllReturnValuesEvaluator):
+    """
+    Used to filter the responses
+    It has a low priority to let other evaluators try to resolve the errors
+    """
+
+    def __init__(self):
+        super().__init__("Parsers Evaluator", 10)
+        self.successful_return_value = None
+
+    def matches(self, context, return_values):
+        sheerka = context.sheerka
+        after_evaluation = False
+        nb_successful_evaluators = 0
+        only_parsers = True
+        for ret in return_values:
+            if sheerka.isinstance(ret.value, BuiltinConcepts.AFTER_EVALUATION):
+                if ret.status:
+                    after_evaluation = True
+            elif ret.who.startswith(self.PREFIX):
+                if ret.status:
+                    nb_successful_evaluators += 1
+                    self.successful_return_value = ret
+            else:
+                if not ret.who.startswith(BaseParser.PREFIX):
+                    only_parsers = False
+
+        return after_evaluation and nb_successful_evaluators == 1 and only_parsers
+
+    def eval(self, context, return_values):
+        sheerka = context.sheerka
+        return sheerka.ret(self.name, True, self.successful_return_value.value, parents=return_values)