cleaner custom actions, potentially able to register from the outside

MTMR/ItemsParsing.swift

@@ -40,7 +40,6 @@ class SupportedTypesHolder {
     private var supportedTypes: [String: ParametersDecoder] = [
         "escape": { _ in return (item: .staticButton(title: "esc"), action: .keyPress(keycode: 53))  },
         "brightnessUp": { _ in return (item: .staticButton(title: "🔆"), action: .keyPress(keycode: 113))  },
-        "exitTouchbar": { _ in return (item: .staticButton(title: "exit"), action: .exitTouchbar)  },
     ]
     
     static let sharedInstance = SupportedTypesHolder()
@@ -54,6 +53,16 @@ class SupportedTypesHolder {
             }
         }
     }
+    
+    func register(typename: String, decoder: @escaping ParametersDecoder) {
+        supportedTypes[typename] = decoder
+    }
+    
+    func register(typename: String, item: ItemType, action: ActionType) {
+        register(typename: typename) { _ in
+            return (item: item, action: action)
+        }
+    }
 }
 
 enum ItemType: Decodable {
@@ -92,7 +101,7 @@ enum ActionType: Decodable {
     case hidKey(keycode: Int)
     case keyPress(keycode: Int)
     case appleSctipt(source: String)
-    case exitTouchbar
+    case custom(closure: ()->())
     
     private enum CodingKeys: String, CodingKey {
         case action

MTMR/TouchBarController.swift

@@ -36,6 +36,9 @@ class TouchBarController: NSObject, NSTouchBarDelegate {
     
     private override init() {
         super.init()
+        SupportedTypesHolder.sharedInstance.register(typename: "exitTouchbar", item: .staticButton(title: "exit"), action: .custom(closure: { [weak self] in
+            self?.dismissTouchBar()
+        }))
         
         loadItems()
         
@@ -145,8 +148,6 @@ class TouchBarController: NSObject, NSTouchBarDelegate {
     
     func action(forItem item: BarItemDefinition) -> ()->() {
         switch item.action {
-        case .exitTouchbar:
-            return { self.dismissTouchBar() }
         case .hidKey(keycode: let keycode):
             return { HIDPostAuxKey(keycode) }
         case .keyPress(keycode: let keycode):
@@ -163,6 +164,8 @@ class TouchBarController: NSObject, NSTouchBarDelegate {
                     print("error \(error) when handling \(item) ")
                 }
             }
+        case .custom(closure: let closure):
+            return closure
         case .none:
             return {}
         }