Rework how purchasable products are presented (#465)

Fixes #464

CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+
+### Fixed
+
+- Platform purchasers cannot upgrade to full version. [#464](https://github.com/passepartoutvpn/passepartout-apple/issues/464)
+
 ## 2.3.2 (2024-01-11)
 
 ### Fixed

Passepartout/App/Views/PaywallView+Purchase.swift

@@ -194,29 +194,8 @@ private extension PaywallView.PurchaseView {
 }
 
 private extension PaywallView.PurchaseView {
-
-    // hide full version if already bought the other platform version
     var skFullVersion: InAppProduct? {
-        guard !productManager.isFullVersion() else {
-            return nil
-        }
-        #if targetEnvironment(macCatalyst)
-        guard !productManager.hasPurchased(.fullVersion_iOS) else {
-            return nil
-        }
-        #else
-        guard !productManager.hasPurchased(.fullVersion_macOS) else {
-            return nil
-        }
-        #endif
-        return productManager.product(withIdentifier: .fullVersion)
-    }
-
-    var skAppleTV: InAppProduct? {
-        guard feature == .appleTV else {
-            return nil
-        }
-        return productManager.product(withIdentifier: .appleTV)
+        productManager.product(withIdentifier: .fullVersion)
     }
 
     var fullFeatures: [FeatureModel] {
@@ -230,8 +209,9 @@ private extension PaywallView.PurchaseView {
     }
 
     var productRowModels: [InAppProduct] {
-        [skFullVersion, skAppleTV]
-            .compactMap { $0 }
+        productManager
+            .purchasableProducts(withFeature: feature)
+            .compactMap { productManager.product(withIdentifier: $0) }
     }
 }
 

PassepartoutLibrary/Sources/PassepartoutFrontend/Managers/ProductManager.swift

@@ -293,6 +293,44 @@ extension ProductManager {
     }
 }
 
+// MARK: Purchasable products
+
+extension ProductManager {
+
+    // no purchase -> full version or platform version
+    // purchased platform -> may only purchase other platform
+
+    public func purchasableProducts(withFeature feature: LocalProduct?) -> [LocalProduct] {
+        var products: [LocalProduct] = {
+            if hasPurchased(.fullVersion) {
+                return []
+            }
+#if targetEnvironment(macCatalyst)
+            if hasPurchased(.fullVersion_macOS) {
+                return []
+            }
+            if hasPurchased(.fullVersion_iOS) {
+                return [.fullVersion_macOS]
+            }
+            return [.fullVersion, .fullVersion_macOS]
+#else
+            if hasPurchased(.fullVersion_iOS) {
+                return []
+            }
+            if hasPurchased(.fullVersion_macOS) {
+                return [.fullVersion_iOS]
+            }
+            return [.fullVersion, .fullVersion_iOS]
+#endif
+        }()
+        if feature == .appleTV && !hasPurchased(.appleTV) {
+            products.append(.appleTV)
+        }
+        return products
+    }
+
+}
+
 // MARK: Helpers
 
 private extension ProductManager {

PassepartoutLibrary/Tests/PassepartoutFrontendTests/ProductManagerTests.swift

@@ -33,6 +33,8 @@ final class ProductManagerTests: XCTestCase {
 
     private let noBuildProducts = BuildProducts { _ in [] }
 
+    // MARK: Build products
+
     func test_givenBuildProducts_whenOlder_thenFullVersion() {
         let reader = MockReceiptReader()
         reader.setReceipt(withBuild: 500, products: [])
@@ -57,6 +59,8 @@ final class ProductManagerTests: XCTestCase {
         XCTAssertFalse(sut.isEligible(forFeature: .fullVersion))
     }
 
+    // MARK: Eligibility
+
     func test_givenPurchase_whenReload_thenCredited() {
         let reader = MockReceiptReader()
         let sut = ProductManager(inApp: inApp, receiptReader: reader, buildProducts: noBuildProducts)
@@ -163,4 +167,70 @@ final class ProductManagerTests: XCTestCase {
 
         XCTAssertTrue(sut.isEligible(forFeature: .appleTV))
     }
+
+    // MARK: Purchasable
+
+    func test_givenNoPurchase_thenCanBuyFullAndPlatformVersion() {
+        let reader = MockReceiptReader()
+        reader.setReceipt(withBuild: 1500, products: [])
+        let sut = ProductManager(inApp: inApp, receiptReader: reader, buildProducts: noBuildProducts)
+
+#if targetEnvironment(macCatalyst)
+        XCTAssertEqual(sut.purchasableProducts(withFeature: nil), [.fullVersion, .fullVersion_macOS])
+#else
+        XCTAssertEqual(sut.purchasableProducts(withFeature: nil), [.fullVersion, .fullVersion_iOS])
+#endif
+    }
+
+    func test_givenFullVersion_thenCannotPurchase() {
+        let reader = MockReceiptReader()
+
+        reader.setReceipt(withBuild: 1500, products: [.fullVersion])
+        let sut = ProductManager(inApp: inApp, receiptReader: reader, buildProducts: noBuildProducts)
+        XCTAssertEqual(sut.purchasableProducts(withFeature: nil), [])
+    }
+
+    func test_givenPlatformVersion_thenCannotPurchaseSamePlatform() {
+        let reader = MockReceiptReader()
+
+#if targetEnvironment(macCatalyst)
+        reader.setReceipt(withBuild: 1500, products: [.fullVersion_macOS])
+        let sut = ProductManager(inApp: inApp, receiptReader: reader, buildProducts: noBuildProducts)
+        XCTAssertEqual(sut.purchasableProducts(withFeature: nil), [])
+#else
+        reader.setReceipt(withBuild: 1500, products: [.fullVersion_iOS])
+        let sut = ProductManager(inApp: inApp, receiptReader: reader, buildProducts: noBuildProducts)
+        XCTAssertEqual(sut.purchasableProducts(withFeature: nil), [])
+#endif
+    }
+
+    func test_givenOtherPlatformVersion_thenCanOnlyPurchaseMissingPlatform() {
+        let reader = MockReceiptReader()
+
+#if targetEnvironment(macCatalyst)
+        reader.setReceipt(withBuild: 1500, products: [.fullVersion_iOS])
+        let sut = ProductManager(inApp: inApp, receiptReader: reader, buildProducts: noBuildProducts)
+        XCTAssertEqual(sut.purchasableProducts(withFeature: nil), [.fullVersion_macOS])
+#else
+        reader.setReceipt(withBuild: 1500, products: [.fullVersion_macOS])
+        let sut = ProductManager(inApp: inApp, receiptReader: reader, buildProducts: noBuildProducts)
+        XCTAssertEqual(sut.purchasableProducts(withFeature: nil), [.fullVersion_iOS])
+#endif
+    }
+
+    func test_givenAppleTV_whenDidNotPurchase_thenCanPurchase() {
+        let reader = MockReceiptReader()
+        reader.setReceipt(withBuild: 1500, products: [])
+        let sut = ProductManager(inApp: inApp, receiptReader: reader, buildProducts: noBuildProducts)
+
+        XCTAssertTrue(sut.purchasableProducts(withFeature: .appleTV).contains(.appleTV))
+    }
+
+    func test_givenAppleTV_whenDidPurchase_thenCannotPurchase() {
+        let reader = MockReceiptReader()
+        reader.setReceipt(withBuild: 1500, products: [.appleTV])
+        let sut = ProductManager(inApp: inApp, receiptReader: reader, buildProducts: noBuildProducts)
+
+        XCTAssertFalse(sut.purchasableProducts(withFeature: .appleTV).contains(.appleTV))
+    }
 }