👌 Even more cleanup

phpmon/Domain/Menu/MainMenu.swift

@@ -307,7 +307,7 @@ class MainMenu: NSObject, NSWindowDelegate, NSMenuDelegate {
         waitAndExecute {
             sender.phpExtension?.toggle()
             
-            if Preferences.isTrue(.autoServiceRestartAfterExtensionToggle) {
+            if Preferences.isEnabled(.autoServiceRestartAfterExtensionToggle) {
                 Actions.restartPhpFpm()
             }
         }
@@ -472,7 +472,7 @@ class MainMenu: NSObject, NSWindowDelegate, NSMenuDelegate {
                     }
                     
                     // Run composer updates
-                    if Preferences.isTrue(.autoComposerGlobalUpdateAfterSwitch) {
+                    if Preferences.isEnabled(.autoComposerGlobalUpdateAfterSwitch) {
                         self.updateGlobalDependencies(notify: false, completion: { _ in sendLocalNotification() })
                     } else {
                         sendLocalNotification()

phpmon/Domain/Preferences/Preferences.swift

@@ -66,13 +66,21 @@ class Preferences {
         return Self.shared.cachedPreferences
     }
     
-    static func isTrue(_ preference: PreferenceName) -> Bool {
+    /**
-        return Preferences.preferences[preference] as! Bool == true
+     Determine whether a particular preference is enabled.
+     - Important: Requires the preference to have a corresponding boolean value, or a fatal error will be thrown.
+     */
+    static func isEnabled(_ preference: PreferenceName) -> Bool {
+        if let bool = Preferences.preferences[preference] as? Bool {
+            return bool == true
+        } else {
+            fatalError("\(preference) is not a valid boolean preference!")
+        }
     }
     
     // MARK: - Internal Functionality
     
-    static func cache() -> [PreferenceName: Any] {
+    private static func cache() -> [PreferenceName: Any] {
         return [
             // Part 1: Always Booleans
             .shouldDisplayDynamicIcon: UserDefaults.standard.bool(forKey: PreferenceName.shouldDisplayDynamicIcon.rawValue) as Any,

phpmon/Domain/Preferences/Views/CheckboxPreferenceView.swift

@@ -21,7 +21,7 @@ class CheckboxPreferenceView: NSView, XibLoadable {
     
     var preference: PreferenceName! {
         didSet {
-            self.buttonCheckbox.state = Preferences.isTrue(self.preference) ? .on : .off
+            self.buttonCheckbox.state = Preferences.isEnabled(self.preference) ? .on : .off
         }
     }