Add permissions check in service helper (#18596)

* Add permissions check in service helper

* Lint

* Fix tests

* Lint

* Typing

* Fix unused impoert

homeassistant/exceptions.py

@@ -1,24 +1,24 @@
 """The exceptions used by Home Assistant."""
+from typing import Optional, Tuple, TYPE_CHECKING
 import jinja2
 
+# pylint: disable=using-constant-test
+if TYPE_CHECKING:
+    # pylint: disable=unused-import
+    from .core import Context  # noqa
+
 
 class HomeAssistantError(Exception):
     """General Home Assistant exception occurred."""
 
-    pass
-
 
 class InvalidEntityFormatError(HomeAssistantError):
     """When an invalid formatted entity is encountered."""
 
-    pass
-
 
 class NoEntitySpecifiedError(HomeAssistantError):
     """When no entity is specified."""
 
-    pass
-
 
 class TemplateError(HomeAssistantError):
     """Error during template rendering."""
@@ -32,16 +32,29 @@ class TemplateError(HomeAssistantError):
 class PlatformNotReady(HomeAssistantError):
     """Error to indicate that platform is not ready."""
 
-    pass
-
 
 class ConfigEntryNotReady(HomeAssistantError):
     """Error to indicate that config entry is not ready."""
 
-    pass
-
 
 class InvalidStateError(HomeAssistantError):
     """When an invalid state is encountered."""
 
-    pass
+
+class Unauthorized(HomeAssistantError):
+    """When an action is unauthorized."""
+
+    def __init__(self, context: Optional['Context'] = None,
+                 user_id: Optional[str] = None,
+                 entity_id: Optional[str] = None,
+                 permission: Optional[Tuple[str]] = None) -> None:
+        """Unauthorized error."""
+        super().__init__(self.__class__.__name__)
+        self.context = context
+        self.user_id = user_id
+        self.entity_id = entity_id
+        self.permission = permission
+
+
+class UnknownUser(Unauthorized):
+    """When call is made with user ID that doesn't exist."""