daemon: use JSON instead of ast.literal_eval

src/daemon.py

-import ast
+import json
 import logging
 
 import dbus
@@ -82,10 +82,10 @@ class Daemon(dbus.service.Object):
                 "Permission denied"
             )
         try:
-            backend_params = ast.literal_eval(backend_params)
+            backend_params = json.loads(backend_params)
             backend = root_backend_factory.get_backend(backend_name, backend_params)
             if backend:
-                return str(backend.get_value(key, gtype))
+                return json.dumps(backend.get_value(key, gtype))
         except Exception as e:
             return dbus.DBusException(
                 "ru.ximperlinux.TuneIt.Daemon", e
@@ -106,7 +106,7 @@ class Daemon(dbus.service.Object):
                 "Permission denied"
             )
         try:
-            backend_params = ast.literal_eval(backend_params)
+            backend_params = json.loads(backend_params)
             backend = root_backend_factory.get_backend(backend_name, backend_params)
             if backend:
                 backend.set_value(key, value, gtype)
@@ -130,10 +130,10 @@ class Daemon(dbus.service.Object):
                 "Permission denied"
             )
         try:
-            backend_params = ast.literal_eval(backend_params)
+            backend_params = json.loads(backend_params)
             backend = root_backend_factory.get_backend(backend_name, backend_params)
             if backend:
-                return str(backend.get_range(key, gtype))
+                return json.dumps(backend.get_range(key, gtype))
         except Exception as e:
             return dbus.DBusException(
                 "ru.ximperlinux.TuneIt.Daemon", e

src/settings/daemon_client.py

+import json
 import logging
 import dbus
-import ast
 
 
 class DaemonClient:
@@ -57,7 +57,7 @@ class DaemonClient:
 
         :param backend_params: Параметры backend в формате JSON.
         """
-        self.backend_params = str(backend_params)
+        self.backend_params = json.dumps(backend_params)
 
     def get_value(self, key, gtype):
         """
@@ -68,7 +68,7 @@ class DaemonClient:
         :return: Полученное значение.
         """
         try:
-            return ast.literal_eval(str(self.interface.GetValue(self.backend_name, str(self.backend_params), key, gtype)))
+            return json.loads(str(self.interface.GetValue(self.backend_name, self.backend_params, key, gtype)))
         except dbus.DBusException as e:
             self.logger.error(f"Error in GetValue: {e}")
             return None
@@ -83,7 +83,7 @@ class DaemonClient:
         :return: Результат операции.
         """
         try:
-            self.interface.SetValue(self.backend_name, str(self.backend_params), key, str(value), gtype)
+            self.interface.SetValue(self.backend_name, self.backend_params, key, str(value), gtype)
         except dbus.DBusException as e:
             self.logger.error(f"Error in SetValue: {e}")
 
@@ -96,7 +96,7 @@ class DaemonClient:
         :return: Диапазон значений.
         """
         try:
-            return ast.literal_eval(str(self.interface.GetRange(self.backend_name, str(self.backend_params), key, gtype)))
+            return json.loads(str(self.interface.GetRange(self.backend_name, self.backend_params, key, gtype)))
         except dbus.DBusException as e:
             self.logger.error(f"Error in GetRange: {e}")
             return None