fix: nits

Author: yuhao900914

Sources/Amplitude/Amplitude.swift

@@ -119,7 +119,9 @@ public class Amplitude {
 
     func onExitForeground() {
         inForeground = false
-        _ = self.flush()
+        if configuration.flushEventsOnClose == true {
+            _ = self.flush()
+        }
     }
 
     public func apply(closure: (Plugin) -> Void) {

Sources/Amplitude/Plugins/Mac/MacOSLifecycleMonitor.swift

@@ -64,33 +64,22 @@
         }
 
         func applicationDidBecomeActive(notification: NSNotification) {
-            analytics?.apply { (ext) in
+            amplitude?.apply { (ext) in
                 if let validExt = ext as? MacOSLifecycle {
                     validExt.applicationDidBecomeActive()
                 }
             }
         }
 
         func applicationWillResignActive(notification: NSNotification) {
-            analytics?.apply { (ext) in
+            amplitude?.apply { (ext) in
                 if let validExt = ext as? MacOSLifecycle {
                     validExt.applicationWillResignActive()
                 }
             }
         }
     }
 
-    extension AmplitudeDestinationPlugin: MacOSLifecycle {
-        public func applicationWillEnterForeground(application: UIApplication?) {
-            let timestamp = NSDate().timeIntervalSince1970
-            self.amplitude?.onEnterForeground(timestamp: timestamp)
-        }
-
-        public func applicationDidEnterBackground(application: UIApplication?) {
-            self.amplitude?.onExitForeground()
-        }
-    }
-
     extension AmplitudeDestinationPlugin: MacOSLifecycle {
         public func applicationDidBecomeActive() {
             let timestamp = NSDate().timeIntervalSince1970

Sources/Amplitude/Plugins/Vendors/AppUtil.swift

@@ -12,7 +12,7 @@
     }
 #endif
 
-#if os(watchOS)
+#if os(macOS)
     internal class MacOSVendorSystem: VendorSystem {
         override var requiredPlugin: Plugin {
             return MacOSLifecycleMonitor()

Sources/Amplitude/Plugins/Vendors/VendorSystem.swift

@@ -13,8 +13,6 @@ internal class VendorSystem {
             return MacOSVendorSystem()
         #elseif os(watchOS)
             return WatchOSVendorSystem()
-        #elseif os(Linux)
-            return LinuxVendorSystem()
         #else
             return VendorSystem()
         #endif

Sources/Amplitude/Plugins/iOS/IOSLifecycleMonitor.swift

@@ -8,7 +8,7 @@
 #if os(iOS) || os(tvOS) || targetEnvironment(macCatalyst)
 
     import Foundation
-    import UIKit
+    import SwiftUI
 
     public protocol IOSLifecycle {
         func applicationDidEnterBackground(application: UIApplication?)

Sources/Amplitude/Plugins/watchOS/WatchOSLifecycleMonitor.swift

@@ -67,7 +67,7 @@
             // from iOS, so ignore until we've been backgrounded at least once.
             if wasBackgrounded == false { return }
 
-            analytics?.apply { (ext) in
+            amplitude?.apply { (ext) in
                 if let validExt = ext as? WatchOSLifecycle {
                     validExt.applicationWillEnterForeground(watchExtension: watchExtension)
                 }
@@ -78,7 +78,7 @@
             // make sure to denote that we were backgrounded.
             wasBackgrounded = true
 
-            analytics?.apply { (ext) in
+            amplitude?.apply { (ext) in
                 if let validExt = ext as? WatchOSLifecycle {
                     validExt.applicationDidEnterBackground(watchExtension: watchExtension)
                 }