Added SheerkaComparisonManager

src/core/sheerka/services/SheerkaVariableManager.py

@@ -0,0 +1,47 @@
+from dataclasses import dataclass
+from typing import List
+
+from core.sheerka.services.sheerka_service import ServiceObj
+
+
+@dataclass
+class Variable(ServiceObj):
+    """
+    Variable to store
+    """
+    who: str  # who is the modifier
+    key: str  # key of the variable
+    value: object  # value
+    parents: List[str]  # previous references of the variable (Note that there should be only one parent)
+
+    def get_key(self):
+        return f"{self.who}|{self.key}"
+
+
+class SheerkaVariableManager:
+
+    def __init__(self, sheerka):
+        self.sheerka = sheerka
+
+    def record(self, context, who, key, value):
+        """
+
+        :param context:
+        :param who: entity that owns the key (acts as a namespace)
+        :param key:
+        :param value:
+        :return:
+        """
+
+        variable = Variable(context.event.get_digest(), who, key, value, None)
+        self.sheerka.cache_manager.put(self.sheerka.VARIABLES_ENTRY, variable.get_key(), variable)
+
+    def load(self, who, key):
+        variable = self.sheerka.cache_manager.get(self.sheerka.VARIABLES_ENTRY, who + "|" + key)
+        if variable is None:
+            return None
+
+        return variable.value
+
+    def delete(self, context, who, key):
+        self.sheerka.cache_manager.delete(self.sheerka.VARIABLES_ENTRY, who + "|" + key)