Fixed #43 : BnfNodeParser: I can recognize when multiple level of ISA

Fixed #44 : BnfNodeParser: I must simplify results when multiple levels of ISA
Fixed #45 : Dynamic variables cannot be parsed at restart
Fixed #46 : Concepts variables values are transformed into list by default
Fixed #47 : SheerkaAdmin. Add min, max, mean time when restoring files

src/core/sheerka/services/SheerkaConceptManager.py

@@ -397,6 +397,17 @@ class SheerkaConceptManager(BaseService):
         ensure_concept(concept)
 
         attr = attribute.str_id if isinstance(attribute, Concept) else attribute
+
+        if (old_value := concept.get_value(attr)) is not NotInit:
+            if old_value == value:
+                return self.sheerka.ret(self.NAME, True, self.sheerka.new(BuiltinConcepts.SUCCESS))
+            
+            if isinstance(old_value, list):
+                old_value.append(value)
+                value = old_value
+            else:
+                value = [old_value, value]
+
         concept.set_value(attr, value)
         return self.sheerka.ret(self.NAME, True, self.sheerka.new(BuiltinConcepts.SUCCESS))
 
@@ -892,11 +903,14 @@ class SheerkaConceptManager(BaseService):
             else:
                 concepts = [concept]
 
-            for concept in concepts:
-                ensure_bnf(context, concept)  # need to make sure that it cannot fail
-                keywords = SheerkaConceptManager.get_first_tokens(sheerka, concept)
-                for keyword in keywords:
-                    (to_resolve if keyword.startswith("c:|") else resolved).add(keyword)
+            for c in concepts:
+                if sheerka.isaset(context, c):
+                    to_resolve.add(c.str_id)
+                else:
+                    ensure_bnf(context, c)  # need to make sure that it cannot fail
+                    keywords = SheerkaConceptManager.get_first_tokens(sheerka, c)
+                    for keyword in keywords:
+                        (to_resolve if keyword.startswith("c:|") else resolved).add(keyword)
 
                 for concept_to_resolve_str in to_resolve:
                     res = resolve_concepts(concept_to_resolve_str)