refactor: centralize shortcut recording lifetime

Sources/ConjureKit/GlobalShortcut.swift

@@ -10,6 +10,18 @@ public final class GlobalShortcut {
     private let defaults: UserDefaults
     private let action: @MainActor () -> Void
     private let native = NativeHotKey()
+    private var registration: Registration?
+
+    struct Registration {
+        var activate: (KeyboardShortcut) throws -> Void
+        var unregister: () throws -> Void
+        var stop: () -> Void
+    }
+
+    convenience init(defaults: UserDefaults, storageKey: String, registration: Registration) {
+        self.init(defaults: defaults, storageKey: storageKey, action: {})
+        self.registration = registration
+    }
 
     public init(
         defaults: UserDefaults = .standard,
@@ -44,7 +56,7 @@ public final class GlobalShortcut {
             try activate(candidate)
             defaults.set(candidate.storedValue, forKey: storageKey)
         } else {
-            try native.unregister()
+            try unregister()
             isRegistered = false
             defaults.removeObject(forKey: storageKey)
         }
@@ -53,7 +65,7 @@ public final class GlobalShortcut {
 
     public func suspend() {
         do {
-            try native.unregister()
+            try unregister()
             isRegistered = false
         } catch {
             NSLog("Conjure could not suspend its shortcut: %@", error.localizedDescription)
@@ -61,7 +73,7 @@ public final class GlobalShortcut {
     }
 
     public func stop() {
-        native.dispose()
+        if let registration { registration.stop() } else { native.dispose() }
         isRegistered = false
     }
 
@@ -69,9 +81,17 @@ public final class GlobalShortcut {
         action()
     }
 
+    private func unregister() throws {
+        if let registration { try registration.unregister() } else { try native.unregister() }
+    }
+
     private func activate(_ candidate: KeyboardShortcut) throws {
-        try Self.rejectSystemConflict(candidate)
-        try native.register(candidate)
+        if let registration {
+            try registration.activate(candidate)
+        } else {
+            try Self.rejectSystemConflict(candidate)
+            try native.register(candidate)
+        }
         isRegistered = true
     }