Working on #98 : Persist attribute value when global_truth is set to true

src/core/sheerka/services/SheerkaConceptManager.py

@@ -295,7 +295,7 @@ class SheerkaConceptManager(BaseService):
         #           'props'    : {<key>: <value>} of properties to add/update,
         #           'variables': {<key>: <value>} of variables to add/update,
         #           }
-        # if the <key> already exists, the entry is updated, otherwise a new value is created
+        # for variables, if the <key> already exists, the entry is updated, otherwise a new value is created
         # for props, if the <key> already exists, a new entry is added to the set
         #
         # to_remove = {
@@ -391,9 +391,10 @@ class SheerkaConceptManager(BaseService):
         sheerka.publish(context, EVENT_CONCEPT_DELETED, concept)
         return sheerka.ret(self.NAME, True, sheerka.new(BuiltinConcepts.SUCCESS))
 
-    def set_attr(self, concept, attribute, value):
+    def set_attr(self, context, concept, attribute, value):
         """
         Modifies an attribute of a concept (concept.values)
+        :param context:
         :param concept:
         :param attribute:
         :param value:
@@ -402,8 +403,16 @@ class SheerkaConceptManager(BaseService):
         ensure_concept(concept)
 
         attr = attribute.str_id if isinstance(attribute, Concept) else attribute
+        old_value = concept.get_value(attr)
 
-        if (old_value := concept.get_value(attr)) is not NotInit:
+        if context.in_context(BuiltinConcepts.EVAL_GLOBAL_TRUTH_REQUESTED):
+            old_value = self.sheerka.get_by_id(concept.id).get_value(attr)
+        else:
+            old_value = concept.get_value(attr)
+
+        # Caution, creating a list when a set_attr is called for the second time is not always
+        #   what is expected
+        if old_value is not NotInit:
             if old_value == value:
                 return self.sheerka.ret(self.NAME, True, self.sheerka.new(BuiltinConcepts.SUCCESS))
 
@@ -413,8 +422,15 @@ class SheerkaConceptManager(BaseService):
             else:
                 value = [old_value, value]
 
-        concept.set_value(attr, value)
-        return self.sheerka.ret(self.NAME, True, self.sheerka.new(BuiltinConcepts.SUCCESS))
+        if context.in_context(BuiltinConcepts.EVAL_GLOBAL_TRUTH_REQUESTED):
+            to_add = {"variables": {attr: value}}
+            res = self.sheerka.modify_concept(context, concept, to_add, modify_source=True)
+            concept.set_value(attr, value)
+            return res
+        else:
+
+            concept.set_value(attr, value)
+            return self.sheerka.ret(self.NAME, True, self.sheerka.new(BuiltinConcepts.SUCCESS))
 
     def get_attr(self, concept, attribute):
         """
@@ -857,6 +873,7 @@ class SheerkaConceptManager(BaseService):
             concept.set_bnf(None)
             ensure_bnf(context, concept)
 
+        self.recompute_concept_parameters(context, concept)
         concept.init_key()
 
         return
@@ -1252,3 +1269,27 @@ class SheerkaConceptManager(BaseService):
         # update the compiled regex
         self.compiled_concepts_by_regex.clear()
         self.compiled_concepts_by_regex.extend(compiled_by_first_regex)
+
+    @staticmethod
+    def recompute_concept_parameters(context, concept):
+        concept.get_metadata().parameters.clear()
+
+        if concept.get_metadata().definition_type == DEFINITION_TYPE_DEF:
+            tokens = list(Tokenizer(concept.get_metadata().definition, yield_eof=False))
+        else:
+            tokens = list(Tokenizer(concept.get_metadata().name, yield_eof=False))
+
+        # all variables that appear in the name are concept parameters
+        if len(tokens) > 0:
+            variables = [p[0] for p in concept.get_metadata().variables]
+            for token in [t for t in tokens if t.value in variables]:
+                concept.get_metadata().parameters.append(token.value)
+
+        # for bnf concept, use the visitor to extract parameters
+        if concept.get_bnf():
+            from evaluators.DefConceptEvaluator import ConceptOrRuleVariableVisitor, ParameterVariable
+            visitor = ConceptOrRuleVariableVisitor(context)
+            visitor.visit(concept.get_bnf())
+            for variable in [v for v in visitor.variables if isinstance(v, ParameterVariable)]:
+                if variable.name not in concept.get_metadata().parameters:
+                    concept.get_metadata().parameters.append(variable.name)