Fix swiftlint warnings

SwiftyStoreKit-iOS-Demo/AppDelegate.swift

@@ -42,7 +42,7 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
         SwiftyStoreKit.completeTransactions(atomically: true) { products in
 
             for product in products {
-
+                // swiftlint:disable:next for_where
                 if product.transaction.transactionState == .purchased || product.transaction.transactionState == .restored {
 
                     if product.needsFinishTransaction {

SwiftyStoreKit-iOS-Demo/ViewController.swift

@@ -97,11 +97,9 @@ class ViewController: UIViewController {
         SwiftyStoreKit.restorePurchases(atomically: true) { results in
             NetworkActivityIndicatorManager.networkOperationFinished()
 
-            for product in results.restoredProducts {
+            for product in results.restoredProducts where product.needsFinishTransaction {
                 // Deliver content from server, then:
-                if product.needsFinishTransaction {
-                    SwiftyStoreKit.finishTransaction(product.transaction)
-                }
+                SwiftyStoreKit.finishTransaction(product.transaction)
             }
             self.showAlert(self.alertForRestorePurchases(results))
         }
@@ -196,7 +194,7 @@ extension ViewController {
     }
 
     func showAlert(_ alert: UIAlertController) {
-        guard let _ = self.presentedViewController else {
+        guard self.presentedViewController != nil else {
             self.present(alert, animated: true, completion: nil)
             return
         }

SwiftyStoreKit-macOS-Demo/AppDelegate.swift

@@ -38,7 +38,7 @@ class AppDelegate: NSObject, NSApplicationDelegate {
         SwiftyStoreKit.completeTransactions(atomically: true) { products in
 
             for product in products {
-
+                // swiftlint:disable:next for_where
                 if product.transaction.transactionState == .purchased || product.transaction.transactionState == .restored {
 
                     if product.needsFinishTransaction {

SwiftyStoreKit-macOS-Demo/ViewController.swift

@@ -94,11 +94,9 @@ class ViewController: NSViewController {
 
         SwiftyStoreKit.restorePurchases(atomically: true) { results in
 
-            for product in results.restoredProducts {
+            for product in results.restoredProducts where product.needsFinishTransaction {
                 // Deliver content from server, then:
-                if product.needsFinishTransaction {
-                    SwiftyStoreKit.finishTransaction(product.transaction)
-                }
+                SwiftyStoreKit.finishTransaction(product.transaction)
             }
 
             self.showAlert(self.alertForRestorePurchases(results))

SwiftyStoreKit/PaymentsController.swift

@@ -44,10 +44,8 @@ class PaymentsController: TransactionController {
     private var payments: [Payment] = []
 
     private func findPaymentIndex(withProductIdentifier identifier: String) -> Int? {
-        for payment in payments {
-            if payment.product.productIdentifier == identifier {
-                return payments.index(of: payment)
-            }
+        for payment in payments where payment.product.productIdentifier == identifier {
+            return payments.index(of: payment)
         }
         return nil
     }

SwiftyStoreKitTests/PaymentQueueControllerTests.swift

@@ -53,7 +53,7 @@ class PaymentQueueControllerTests: XCTestCase {
 
         let spy = PaymentQueueSpy()
 
-        let _ = PaymentQueueController(paymentQueue: spy)
+        _ = PaymentQueueController(paymentQueue: spy)
 
         XCTAssertNil(spy.observer)
     }

SwiftyStoreKitTests/PaymentsControllerTests.swift

@@ -79,7 +79,7 @@ class PaymentsControllerTests: XCTestCase {
         let payment = makeTestPayment(product: testProduct) { result in
 
             callbackCalled = true
-            if case .failed(_) = result {
+            if case .failed = result {
 
             } else {
                 XCTFail("expected failed callback with error")
@@ -124,7 +124,7 @@ class PaymentsControllerTests: XCTestCase {
         var callback2Called = false
         let payment2 = makeTestPayment(product: testProduct2) { result in
             callback2Called = true
-            if case .failed(_) = result {
+            if case .failed = result {
 
             } else {
                 XCTFail("expected failed callback with error")

SwiftyStoreKitTests/RestorePurchasesControllerTests.swift

@@ -121,7 +121,7 @@ class RestorePurchasesControllerTests: XCTestCase {
 
             XCTAssertEqual(results.count, 1)
             let first = results.first!
-            if case .failed(_) = first {
+            if case .failed = first {
 
             } else {
                 XCTFail("expected failed callback with error")