Some Bug Fixes & Improvements

CHANGELOG.md

@@ -2,6 +2,8 @@
 
 All notable changes to this project will be documented in this file.
 
+* Make `ProductsInfoController`'s `retrieveProductsInfo` thread safe ([#405]https://github.com/bizz84/SwiftyStoreKit/pull/495), related issues: [#344](https://github.com/bizz84/SwiftyStoreKit/issues/344) and [#468](https://github.com/bizz84/SwiftyStoreKit/issues/468)
+
 ## [0.15.0](https://github.com/bizz84/SwiftyStoreKit/releases/tag/0.15.0) Update project to Swift 5, Xcode 10.2
 
 * Update project to Swift 5 ([#457](https://github.com/bizz84/SwiftyStoreKit/pull/457)), related issue: [#456](https://github.com/bizz84/SwiftyStoreKit/issues/456)

Package.swift

@@ -8,7 +8,7 @@ let package = Package(
         // Products define the executables and libraries produced by a package, and make them visible to other packages.
         .library(
             name: "SwiftyStoreKit",
-            targets: ["SwiftyStoreKit"]),
+            targets: ["SwiftyStoreKit"])
     ],
     dependencies: [
         // Dependencies declare other packages that this package depends on.
@@ -22,6 +22,6 @@ let package = Package(
             dependencies: []),
         .testTarget(
             name: "SwiftyStoreKitTests",
-            dependencies: ["SwiftyStoreKit"]),
+            dependencies: ["SwiftyStoreKit"])
     ]
 )

README.md

@@ -798,6 +798,8 @@ It would be great to showcase apps using SwiftyStoreKit here. Pull requests welc
 * [Talk Dim Sum](https://itunes.apple.com/us/app/talk-dim-sum/id953929066) - Your dim sum companion
 * [Sluggard](https://itunes.apple.com/app/id1160131071) - Perform simple exercises to reduce the risks of sedentary lifestyle
 * [Debts iOS](https://debts.ivanvorobei.by/ios) & [Debts macOS](https://debts.ivanvorobei.by/macos) - Track amounts owed
+* [Botcher](https://itunes.apple.com/us/app/id1522337788) - Good for finding something to do
+* [Hashr](https://apps.apple.com/app/id1166499829) - Generate unique password hashes based on website and master password
 
 A full list of apps is published [on AppSight](https://www.appsight.io/sdk/574154).
 

Sources/SwiftyStoreKit/InAppProductQueryRequest.swift

@@ -31,13 +31,20 @@ public protocol InAppRequest: class {
     func cancel()
 }
 
-protocol InAppProductRequest: InAppRequest { }
+protocol InAppProductRequest: InAppRequest {
+    var hasCompleted: Bool { get }
+    var cachedResults: RetrieveResults? { get }
+}
 
 class InAppProductQueryRequest: NSObject, InAppProductRequest, SKProductsRequestDelegate {
 
     private let callback: InAppProductRequestCallback
     private let request: SKProductsRequest
 
+    private(set) var cachedResults: RetrieveResults?
+
+    var hasCompleted: Bool { cachedResults != nil }
+
     deinit {
         request.delegate = nil
     }
@@ -52,6 +59,7 @@ class InAppProductQueryRequest: NSObject, InAppProductRequest, SKProductsRequest
     func start() {
         request.start()
     }
+
     func cancel() {
         request.cancel()
     }
@@ -61,8 +69,12 @@ class InAppProductQueryRequest: NSObject, InAppProductRequest, SKProductsRequest
 
         let retrievedProducts = Set<SKProduct>(response.products)
         let invalidProductIDs = Set<String>(response.invalidProductIdentifiers)
-        performCallback(RetrieveResults(retrievedProducts: retrievedProducts,
-            invalidProductIDs: invalidProductIDs, error: nil))
+        let results = RetrieveResults(
+            retrievedProducts: retrievedProducts,
+            invalidProductIDs: invalidProductIDs, error: nil
+        )
+        self.cachedResults = results
+        performCallback(results)
     }
 
     func requestDidFinish(_ request: SKRequest) {

Sources/SwiftyStoreKit/OS.swift

@@ -46,7 +46,7 @@ public struct SKError: Error {
         self._nsError = _nsError
     }
 
-    var code: Code {
+    public var code: Code {
         return Code(rawValue: _nsError.code) ?? .unknown
     }
 

Sources/SwiftyStoreKit/PaymentQueueController.swift

@@ -88,6 +88,14 @@ extension SKPaymentTransactionState: CustomDebugStringConvertible {
     }
 }
 
+struct EntitlementRevocation {
+    let callback: ([String]) -> Void
+
+    init(callback: @escaping ([String]) -> Void) {
+        self.callback = callback
+    }
+}
+
 class PaymentQueueController: NSObject, SKPaymentTransactionObserver {
 
     private let paymentsController: PaymentsController
@@ -97,7 +105,9 @@ class PaymentQueueController: NSObject, SKPaymentTransactionObserver {
     private let completeTransactionsController: CompleteTransactionsController
 
     unowned let paymentQueue: PaymentQueue
-
+
+    private var entitlementRevocation: EntitlementRevocation?
+
     deinit {
         paymentQueue.remove(self)
     }
@@ -145,6 +155,15 @@ class PaymentQueueController: NSObject, SKPaymentTransactionObserver {
         paymentsController.append(payment)
     }
 
+    func onEntitlementRevocation(_ revocation: EntitlementRevocation) {
+        guard entitlementRevocation == nil else {
+            print("SwiftyStoreKit.onEntitlementRevocation() should only be called once when the app launches. Ignoring this call")
+            return
+        }
+
+        self.entitlementRevocation = revocation
+    }
+
     func restorePurchases(_ restorePurchases: RestorePurchases) {
         assertCompleteTransactionsWasCalled()
 
@@ -206,7 +225,7 @@ class PaymentQueueController: NSObject, SKPaymentTransactionObserver {
          * Failed transactions only ever belong to queued payment requests.
          * restoreCompletedTransactionsFailedWithError is always called when a restore purchases request fails.
          * paymentQueueRestoreCompletedTransactionsFinished is always called following 0 or more update transactions when a restore purchases request succeeds.
-         * A complete transactions handler is require to catch any transactions that are updated when the app is not running.
+         * A complete transactions handler is required to catch any transactions that are updated when the app is not running.
          * Registering a complete transactions handler when the app launches ensures that any pending transactions can be cleared.
          * If a complete transactions handler is missing, pending transactions can be mis-attributed to any new incoming payments or restore purchases.
          *
@@ -233,6 +252,11 @@ class PaymentQueueController: NSObject, SKPaymentTransactionObserver {
         }
     }
 
+    func paymentQueue(_ queue: SKPaymentQueue, didRevokeEntitlementsForProductIdentifiers productIdentifiers: [String]) {
+
+        self.entitlementRevocation?.callback(productIdentifiers)
+    }
+
     func paymentQueue(_ queue: SKPaymentQueue, removedTransactions transactions: [SKPaymentTransaction]) {
 
     }

Sources/SwiftyStoreKit/ProductsInfoController.swift

@@ -69,9 +69,21 @@ class ProductsInfoController: NSObject {
             }
             inflightRequests[productIds] = InAppProductQuery(request: request, completionHandlers: [completion])
             request.start()
+
             return request
+
         } else {
+
             inflightRequests[productIds]!.completionHandlers.append(completion)
+
+            let query = inflightRequests[productIds]!
+
+            if query.request.hasCompleted {
+                query.completionHandlers.forEach {
+                    $0(query.request.cachedResults!)
+                }
+            }
+
             return inflightRequests[productIds]!.request
         }
     }

Sources/SwiftyStoreKit/SKProductDiscount+LocalizedPrice.swift

@@ -60,4 +60,3 @@ public extension SKProductDiscount {
     }
 
 }
-

Sources/SwiftyStoreKit/SwiftyStoreKit+Types.swift

@@ -175,7 +175,7 @@ public enum VerifySubscriptionResult {
     case notPurchased
 }
 
-public enum SubscriptionType {
+public enum SubscriptionType: Hashable {
     case autoRenewable
     case nonRenewing(validDuration: TimeInterval)
 }

Sources/SwiftyStoreKit/SwiftyStoreKit.swift

@@ -84,6 +84,11 @@ public class SwiftyStoreKit {
 
         paymentQueueController.completeTransactions(CompleteTransactions(atomically: atomically, callback: completion))
     }
+
+    fileprivate func onEntitlementRevocation(completion: @escaping ([String]) -> Void) {
+
+        paymentQueueController.onEntitlementRevocation(EntitlementRevocation(callback: completion))
+    }
 
     fileprivate func finishTransaction(_ transaction: PaymentTransaction) {
 
@@ -187,6 +192,14 @@ extension SwiftyStoreKit {
 
         sharedInstance.completeTransactions(atomically: atomically, completion: completion)
     }
+
+    /// Entitlement revocation notification
+    ///   - Parameter completion: handler for result (list of product identifiers revoked)
+    @available(iOS 14, tvOS 14, OSX 11, watchOS 7, macCatalyst 14, *)
+    public class func onEntitlementRevocation(completion: @escaping ([String]) -> Void) {
+
+        sharedInstance.onEntitlementRevocation(completion: completion)
+    }
 
     /// Finish a transaction
     ///