feat(desktop): add 'swayidle' module

home/modules/desktop/niri/default.nix

@@ -11,6 +11,7 @@
     ../../fuzzel
     ../../mako
     ../../shikane
+    ../../swayidle
     ../../waybar
   ];
 
@@ -21,6 +22,7 @@
     fuzzel.enable = lib.mkDefault true;
     mako.enable = lib.mkDefault true;
     shikane.enable = lib.mkDefault true;
+    swayidle.enable = lib.mkDefault true;
     waybar.enable = lib.mkDefault true;
 
     home = {

home/modules/swayidle/default.nix

@@ -0,0 +1,31 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+let
+  cfg = config.swayidle;
+in
+{
+  options.swayidle = {
+    enable = lib.mkEnableOption "swayidle";
+    timeout = lib.mkOption {
+      type = lib.types.ints.positive;
+      default = 900;
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    services.swayidle = {
+      enable = true;
+      timeouts = [
+        {
+          inherit (cfg) timeout;
+          command = "${lib.getExe' pkgs.systemd "systemctl"} suspend";
+        }
+      ];
+    };
+  };
+}