refactor(hyprland): simplify keybind action schema

configs/nixos/registry/desktop-keybind.nix

@@ -1,12 +1,20 @@
 { lib, ... }:
 let
-  actionMatchesType =
+  actionType = lib.types.addCheck (lib.types.attrsOf lib.types.anything) isAction;
+
+  isAction =
     action:
-    let
+    builtins.hasAttr "type" action
-      required = actionFields.${action.type};
+    && builtins.hasAttr action.type actionFields
-    in
+    && (
-    lib.all (field: action.${field} != null) required
+      let
-    && lib.all (field: lib.elem field required || action.${field} == null) actionOptions;
+        fields = builtins.getAttr action.type actionFields;
+        allowedFields = [ "type" ] ++ fields;
+      in
+      lib.all (field: builtins.hasAttr field action) fields
+      && lib.all (field: lib.elem field allowedFields) (builtins.attrNames action)
+      && lib.all (field: actionFieldChecks.${field} action.${field}) fields
+    );
 
   actionFields = {
     exec = [ "command" ];
@@ -25,14 +33,21 @@ let
     "move-to-workspace" = [ "workspace" ];
   };
 
-  actionOptions = [
+  actionFieldChecks = {
-    "command"
+    command = builtins.isString;
-    "direction"
+    direction =
-    "x"
+      direction:
-    "y"
+      lib.elem direction [
-    "workspace"
+        "left"
-    "message"
+        "down"
-  ];
+        "up"
+        "right"
+      ];
+    x = builtins.isInt;
+    y = builtins.isInt;
+    workspace = builtins.isInt;
+    message = builtins.isString;
+  };
 in
 {
   checks = [
@@ -40,10 +55,6 @@ in
       assertion = entries: lib.all (entry: entry.value.keys != [ ]) entries;
       message = "Desktop keybinds must set at least one key.";
     }
-    {
-      assertion = entries: lib.all (entry: actionMatchesType entry.value.action) entries;
-      message = "Desktop keybind action fields must match their type.";
-    }
   ];
 
   type = lib.types.submodule {
@@ -58,74 +69,7 @@ in
       };
 
       action = lib.mkOption {
-        type = lib.types.submodule {
+        type = actionType;
-          options = {
-            type = lib.mkOption {
-              type = lib.types.enum [
-                "exec"
-                "focus"
-                "move-window"
-                "resize-window"
-                "toggle-floating"
-                "fullscreen"
-                "layout"
-                "close-window"
-                "kill-window"
-                "focus-workspace"
-                "move-to-workspace"
-              ];
-              description = "Selects the desktop action this keybind triggers.";
-            };
-
-            command = lib.mkOption {
-              type = lib.types.nullOr lib.types.str;
-              default = null;
-              example = "ghostty";
-              description = "Command executed by an exec action.";
-            };
-
-            direction = lib.mkOption {
-              type = lib.types.nullOr (
-                lib.types.enum [
-                  "left"
-                  "down"
-                  "up"
-                  "right"
-                ]
-              );
-              default = null;
-              description = "Direction used by focus and move-window actions.";
-            };
-
-            x = lib.mkOption {
-              type = lib.types.nullOr lib.types.int;
-              default = null;
-              example = 40;
-              description = "Horizontal delta used by resize-window actions.";
-            };
-
-            y = lib.mkOption {
-              type = lib.types.nullOr lib.types.int;
-              default = null;
-              example = 40;
-              description = "Vertical delta used by resize-window actions.";
-            };
-
-            workspace = lib.mkOption {
-              type = lib.types.nullOr lib.types.int;
-              default = null;
-              example = 1;
-              description = "Workspace number used by workspace actions.";
-            };
-
-            message = lib.mkOption {
-              type = lib.types.nullOr lib.types.str;
-              default = null;
-              example = "togglesplit";
-              description = "Layout message sent by layout actions.";
-            };
-          };
-        };
         description = "Declares the desktop action for this keybind.";
       };
     };