Rewrite wrong refund logic (#462)

So, if both a purchase and a refund of feature `.foobar` existed,
whatever the dates, the purchase was incorrectly discarded.

Fixes #459, fixes #461

CHANGELOG.md

@@ -5,6 +5,13 @@ 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
+
+- "Restore purchases" not working. [#459](https://github.com/passepartoutvpn/passepartout-apple/issues/459)
+- Purchase is not credited if any refund was issued in the past. [#461](https://github.com/passepartoutvpn/passepartout-apple/issues/461)
+
 ## 2.3.2 (2024-01-09)
 
 ### Fixed

Gemfile.lock

@@ -207,6 +207,7 @@ GEM
 PLATFORMS
   arm64-darwin-22
   x86_64-darwin-19
+  x86_64-linux
 
 DEPENDENCIES
   dotenv

Passepartout/App/Constants/Constants+App.swift

@@ -163,10 +163,11 @@ extension Constants {
         private static let parentPath = "Library/Caches"
 
         static let level: LoggerLevel = {
-            guard let levelString = ProcessInfo.processInfo.environment["LOG_LEVEL"], let levelNum = Int(levelString) else {
+            guard let levelString = ProcessInfo.processInfo.environment["LOG_LEVEL"],
-                return .info
+                  let levelNum = Int(levelString) else {
+                return .debug
             }
-            return .init(rawValue: levelNum) ?? .info
+            return .init(rawValue: levelNum) ?? .debug
         }()
 
         static let maxBytes = 100000

Passepartout/App/Context/AppContext.swift

@@ -122,15 +122,6 @@ private extension AppContext {
                     self?.reviewer.reportEvent()
                 }
             }.store(in: &cancellables)
-
-        productManager.didRefundProducts
-            .receive(on: DispatchQueue.main)
-            .sink { [weak self] in
-                Task {
-                    pp_log.info("Refunds detected, uninstalling VPN profile")
-                    await self?.coreContext.vpnManager.uninstall()
-                }
-            }.store(in: &cancellables)
     }
 
     // eligibility: ignore network settings if ineligible

PassepartoutLibrary/Sources/PassepartoutFrontend/Managers/ProductManager.swift

@@ -38,8 +38,6 @@ public final class ProductManager: NSObject, ObservableObject {
 
     public let buildProducts: BuildProducts
 
-    public let didRefundProducts = PassthroughSubject<Void, Never>()
-
     @Published public private(set) var appType: AppType
 
     @Published public private(set) var isRefreshingProducts = false
@@ -58,19 +56,6 @@ public final class ProductManager: NSObject, ObservableObject {
 
     private var purchaseDates: [LocalProduct: Date]
 
-    private var cancelledPurchases: Set<LocalProduct>? {
-        willSet {
-            guard cancelledPurchases != nil else {
-                return
-            }
-            guard let newCancelledPurchases = newValue, newCancelledPurchases != cancelledPurchases else {
-                pp_log.debug("No purchase was refunded")
-                return
-            }
-            detectRefunds(newCancelledPurchases)
-        }
-    }
-
     public init(inApp: any LocalInApp,
                 receiptReader: ReceiptReader,
                 overriddenAppType: AppType? = nil,
@@ -85,7 +70,6 @@ public final class ProductManager: NSObject, ObservableObject {
         purchasedAppBuild = nil
         purchasedFeatures = []
         purchaseDates = [:]
-        cancelledPurchases = nil
 
         super.init()
 
@@ -194,15 +178,24 @@ public final class ProductManager: NSObject, ObservableObject {
 
 extension ProductManager {
     public func isEligible(forFeature feature: LocalProduct) -> Bool {
-        if let purchasedAppBuild = purchasedAppBuild {
+        if let purchasedAppBuild {
             if feature == .networkSettings && buildProducts.hasProduct(.networkSettings, atBuild: purchasedAppBuild) {
                 return true
             }
         }
+        pp_log.verbose("Eligibility: purchasedFeatures = \(purchasedFeatures)")
+        pp_log.verbose("Eligibility: purchaseDates = \(purchaseDates)")
+        pp_log.verbose("Eligibility: isIncludedInFullVersion(\(feature)) = \(isIncludedInFullVersion(feature))")
         if isIncludedInFullVersion(feature) {
-            return isFullVersion() || isActivePurchase(feature)
+            let isFullVersion = isFullVersion()
+            let isActive = isActivePurchase(feature)
+            pp_log.verbose("Eligibility: isFullVersion() = \(isFullVersion)")
+            pp_log.verbose("Eligibility: isActivePurchase(\(feature)) = \(isActive)")
+            return isFullVersion || isActive
         }
-        return isActivePurchase(feature)
+        let isActive = isActivePurchase(feature)
+        pp_log.verbose("Eligibility: isActivePurchase(\(feature)) = \(isActive)")
+        return isActive
     }
 
     public func isEligible(forProvider providerName: ProviderName) -> Bool {
@@ -219,11 +212,11 @@ extension ProductManager {
 
 extension ProductManager {
     func isActivePurchase(_ feature: LocalProduct) -> Bool {
-        purchasedFeatures.contains(feature) && cancelledPurchases?.contains(feature) != true
+        purchasedFeatures.contains(feature)
     }
 
     func isActivePurchase(where predicate: (LocalProduct) -> Bool) -> Bool {
-        purchasedFeatures.contains(where: predicate) && cancelledPurchases?.contains(where: predicate) != true
+        purchasedFeatures.contains(where: predicate)
     }
 
     func isCurrentPlatformVersion() -> Bool {
@@ -236,16 +229,19 @@ extension ProductManager {
 
     public func isFullVersion() -> Bool {
         if appType == .fullVersion {
+            pp_log.verbose("Eligibility: appType = .fullVersion")
             return true
         }
+        pp_log.verbose("Eligibility: isCurrentPlatformVersion() = \(isCurrentPlatformVersion())")
         if isCurrentPlatformVersion() {
             return true
         }
+        pp_log.verbose("Eligibility: isActivePurchase(.fullVersion) = \(isActivePurchase(.fullVersion))")
         return isActivePurchase(.fullVersion)
     }
 
     public func isPayingUser() -> Bool {
-        !purchasedFeatures.subtracting(cancelledPurchases ?? []).isEmpty
+        !purchasedFeatures.isEmpty
     }
 }
 
@@ -262,7 +258,6 @@ extension ProductManager {
             purchasedAppBuild = originalBuildNumber
         }
         purchasedFeatures.removeAll()
-        var newCancelledPurchases: Set<LocalProduct> = []
 
         if let buildNumber = purchasedAppBuild {
             pp_log.debug("Original purchased build: \(buildNumber)")
@@ -282,7 +277,6 @@ extension ProductManager {
                 }
                 if let cancellationDate = $0.cancellationDate {
                     pp_log.debug("\t\(pid) [cancelled on: \(cancellationDate)]")
-                    newCancelledPurchases.insert(product)
                     return
                 }
                 if let purchaseDate = $0.originalPurchaseDate {
@@ -296,7 +290,6 @@ extension ProductManager {
         if andNotify {
             objectWillChange.send()
         }
-        cancelledPurchases = newCancelledPurchases
     }
 }
 
@@ -310,28 +303,4 @@ private extension ProductManager {
         false
         #endif
     }
-
-    // FIXME: in-app, this is incomplete
-    func detectRefunds(_ refunds: Set<LocalProduct>) {
-        let isEligibleForFullVersion = isFullVersion()
-        let hasCancelledFullVersion: Bool
-        let hasCancelledTrustedNetworks: Bool
-
-        if isMac {
-            hasCancelledFullVersion = !isEligibleForFullVersion && (
-                refunds.contains(.fullVersion) || refunds.contains(.fullVersion_macOS)
-            )
-            hasCancelledTrustedNetworks = false
-        } else {
-            hasCancelledFullVersion = !isEligibleForFullVersion && (
-                refunds.contains(.fullVersion) || refunds.contains(.fullVersion_iOS)
-            )
-            hasCancelledTrustedNetworks = !isEligibleForFullVersion && refunds.contains(.trustedNetworks)
-        }
-
-        // review features and potentially revert them if they were used (Siri is handled in AppDelegate)
-        if hasCancelledFullVersion || hasCancelledTrustedNetworks {
-            didRefundProducts.send()
-        }
-    }
 }