Updated Command to allow client_response. First implementation or UserProfile control

src/myfasthtml/core/instances.py

@@ -1,5 +1,11 @@
 import uuid
 
+from myfasthtml.controls.helpers import Ids
+
+special_session = {
+    "user_info": {"id": "** SPECIAL SESSION **"}
+}
+
 
 class DuplicateInstanceError(Exception):
   def __init__(self, instance):
@@ -34,6 +40,16 @@ class SingleInstance(BaseInstance):
     self._instance = None
 
 
+class UniqueInstance(BaseInstance):
+  """
+  Base class for instances that can only have one instance at a time.
+  Does not throw exception if the instance already exists, it simply overwrites it.
+  """
+  
+  def __init__(self, session: dict, prefix: str, auto_register: bool = True):
+    super().__init__(session, prefix, auto_register)
+    self._instance = None
+
 class MultipleInstance(BaseInstance):
   """
   Base class for instances that can have multiple instances at a time.
@@ -79,7 +95,10 @@ class InstancesManager:
       
       return InstancesManager.instances[key]
     except KeyError:
-      return instance_type(session, *args, **kwargs)  # it will be automatically registered
+      if instance_type:
+        return instance_type(session, *args, **kwargs)  # it will be automatically registered
+      else:
+        raise
   
   @staticmethod
   def _get_session_id(session):
@@ -88,3 +107,7 @@ class InstancesManager:
     if "user_info" not in session:
       return "** UNKNOWN USER **"
     return session["user_info"].get("id", "** INVALID SESSION **")
+  
+  @staticmethod
+  def get_auth_proxy():
+    return InstancesManager.get(special_session, Ids.AuthProxy)