First implementation of questions management

src/core/sheerka/services/SheerkaQuestion.py

@@ -0,0 +1,40 @@
+from core.builtin_concepts import BuiltinConcepts
+from core.concept import Concept
+from core.sheerka.services.sheerka_service import BaseService
+
+
+class SheerkaQuestion(BaseService):
+    NAME = "Question"
+
+    def __init__(self, sheerka):
+        super().__init__(sheerka)
+
+    def initialize(self):
+        self.sheerka.bind_service_method(self.question, False)
+        self.sheerka.bind_service_method(self.is_question, False)
+
+    def question(self, context, q):
+        """
+        Evaluate q in the context in a question
+        :param context:
+        :param q:
+        :return:
+        """
+
+        if isinstance(q, Concept):
+            with context.push(BuiltinConcepts.EVALUATE_CONCEPT, q, desc=f"Evaluating question '{q}'") as sub_context:
+                sub_context.global_hints.add(BuiltinConcepts.EVAL_QUESTION_REQUESTED)
+                sub_context.global_hints.add(BuiltinConcepts.EVAL_BODY_REQUESTED)
+                sub_context.global_hints.add(BuiltinConcepts.EVAL_UNTIL_SUCCESS_REQUESTED)
+                sub_context.protected_hints.add(BuiltinConcepts.RETURN_BODY_REQUESTED)
+
+                evaluated = self.sheerka.evaluate_concept(sub_context, q)
+
+            return evaluated
+
+    def is_question(self, context):
+        """
+        Returns True if a question is asked
+        :return:
+        """
+        return context.in_context(BuiltinConcepts.EVAL_QUESTION_REQUESTED)