Implemented ConceptManager with concept creation, modification and deletion

src/parsers/BaseNodeParser.py

@@ -846,6 +846,7 @@ class BaseNodeParser(BaseParser):
     def get_concepts(self, token, to_keep, custom=None, to_map=None, strip_quotes=False):
         """
         Tries to find if there are concepts that match the value of the token
+        Caution: Returns the actual cache, not a copy
         :param token:
         :param to_keep: predicate to tell if the concept is eligible
         :param custom: lambda name -> List[Concepts] that gives extra concepts, according to the name
@@ -882,16 +883,17 @@ class BaseNodeParser(BaseParser):
         return custom_concepts if custom else None
 
     @staticmethod
-    def get_concepts_by_first_token(context, concepts, use_sheerka=False):
+    def get_concepts_by_first_token(context, concepts, use_sheerka=False, previous_entries=None):
         """
         Create the map describing the first token expected by a concept
         :param context:
         :param concepts: lists of concepts to parse
         :param use_sheerka: if True, update concepts_by_first_keyword from sheerka
+        :param previous_entries:
         :return:
         """
         sheerka = context.sheerka
-        res = sheerka.cache_manager.copy(sheerka.CONCEPTS_BY_FIRST_KEYWORD_ENTRY) if use_sheerka else {}
+        res = sheerka.cache_manager.copy(sheerka.CONCEPTS_BY_FIRST_KEYWORD_ENTRY) if use_sheerka else (previous_entries or {})
         for concept in concepts:
             keywords = BaseNodeParser.get_first_tokens(sheerka, concept)
 
@@ -909,10 +911,15 @@ class BaseNodeParser(BaseParser):
         return sheerka.ret("BaseNodeParser", True, res)
 
     @staticmethod
-    def resolve_concepts_by_first_keyword(context, concepts_by_first_keyword):
+    def resolve_concepts_by_first_keyword(context, concepts_by_first_keyword, modified_concepts=None):
         sheerka = context.sheerka
         res = {}
 
+        def get_by_id(c_id):
+            if modified_concepts and c_id in modified_concepts:
+                return modified_concepts[c_id]
+            return sheerka.get_by_id(c_id)
+
         def resolve_concepts(concept_str):
             c_key, c_id = core.utils.unstr_concept(concept_str)
             if c_id in already_seen:
@@ -924,7 +931,7 @@ class BaseNodeParser(BaseParser):
             to_resolve = set()
             chicken_and_egg = set()
 
-            concept = sheerka.get_by_id(c_id)
+            concept = get_by_id(c_id)
 
             if sheerka.isaset(context, concept):
                 concepts = sheerka.get_set_elements(context, concept)