Added ModifyConcept function, and fixed 'isa' not working

src/core/concept.py

@@ -1,6 +1,6 @@
 import hashlib
 from collections import namedtuple
-from dataclasses import dataclass, field
+from dataclasses import dataclass
 from enum import Enum
 from core.sheerka_logger import get_logger
 
@@ -15,6 +15,7 @@ PROPERTIES_FOR_DIGEST = ("name", "key",
 PROPERTIES_TO_SERIALIZE = PROPERTIES_FOR_DIGEST + tuple(["id"])
 PROPERTIES_FOR_NEW = ("where", "pre", "post", "body", "desc")
 VARIABLE_PREFIX = "__var__"
+ORIGIN = "##origin##"  # same as Serializer.ORIGIN but I don't want to include the reference
 
 
 class ConceptParts(Enum):
@@ -97,6 +98,7 @@ class Concept:
         self.bnf = None
         self.log = get_logger("core." + self.__class__.__name__)
         self.init_log = get_logger("init.core." + self.__class__.__name__)
+        self.original_definition_hash = None
 
     def __repr__(self):
         return f"({self.metadata.id}){self.metadata.name}"
@@ -243,7 +245,19 @@ class Concept:
     def body(self):
         return self.values[ConceptParts.BODY] if ConceptParts.BODY in self.values else None
 
-    def get_digest(self):
+    def get_origin(self):
+        """
+        Return the digest used to save the concept if it exists
+        :return:
+        """
+        if hasattr(self, ORIGIN):
+            return getattr(self, ORIGIN)
+        return None
+
+    def set_origin(self, origin):
+        setattr(self, ORIGIN, origin)
+
+    def get_definition_hash(self):
         """
         Returns the digest of the event
         :return: hexa form of the sha256
@@ -301,6 +315,11 @@ class Concept:
         for k, v in other.props.items():
             self.set_prop(k, v.value)
 
+        # origin
+        from sdp.sheerkaSerializer import Serializer
+        if hasattr(other, Serializer.ORIGIN):
+            setattr(self, Serializer.ORIGIN, getattr(other, Serializer.ORIGIN))
+
         return self
 
     def set_prop(self, prop_name, prop_value):
@@ -362,6 +381,12 @@ class Concept:
         self.metadata.is_evaluated = True
         return self
 
+    def freeze_definition_hash(self):
+        self.original_definition_hash = self.get_definition_hash()
+
+    def get_original_definition_hash(self):
+        return self.original_definition_hash
+
 
 class Property:
     """