[in_app_purchase_storekit] Add Swift Package Manager compatibility (flutter#8469)

Makes `in_app_purchase_storekit` available as a Swift Package to Flutter

Closes [#146905](flutter/flutter#146905)

Author: alejandro-all-win-software

packages/in_app_purchase/in_app_purchase_storekit/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.3.21
+
+* Adds Swift Package Manager compatibility.
+
 ## 0.3.20+4
 
 * Exposes `jsonRepresentation` field for transactions.

packages/in_app_purchase/in_app_purchase_storekit/darwin/Classes/in_app_purchase_storekit-Bridging-Header.h

@@ -17,14 +17,16 @@ Downloaded by pub (not CocoaPods).
   # Updating it before the package is published will cause a lint error and block the tree.
   s.documentation_url = 'https://pub.dev/packages/in_app_purchase'
   s.swift_version = '5.0'
-  s.source_files = 'Classes/**/*.{h,m,swift}'
-  s.public_header_files = 'Classes/**/*.h'
+  s.source_files = 'in_app_purchase_storekit/Sources/**/*.{h,m,swift}'
+  s.public_header_files = 'in_app_purchase_storekit/Sources/in_app_purchase_storekit_objc/include/**/*.h'
+
   s.ios.dependency 'Flutter'
   s.osx.dependency 'FlutterMacOS'
   s.ios.deployment_target = '12.0'
   s.osx.deployment_target = '10.15'
+
   s.pod_target_xcconfig = { 'DEFINES_MODULE' => 'YES' }
-  s.resource_bundles = {'in_app_purchase_storekit_privacy' => ['Resources/PrivacyInfo.xcprivacy']}
+  s.resource_bundles = {'in_app_purchase_storekit_privacy' => ['in_app_purchase_storekit/Sources/in_app_purchase_storekit/Resources/PrivacyInfo.xcprivacy']}
   s.xcconfig = {
     'LIBRARY_SEARCH_PATHS' => '$(TOOLCHAIN_DIR)/usr/lib/swift/$(PLATFORM_NAME)/ $(SDKROOT)/usr/lib/swift',
     'LD_RUNPATH_SEARCH_PATHS' => '/usr/lib/swift',

packages/in_app_purchase/in_app_purchase_storekit/darwin/in_app_purchase_storekit.podspec

@@ -0,0 +1,39 @@
+// swift-tools-version: 5.9
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import PackageDescription
+
+let package = Package(
+  name: "in_app_purchase_storekit",
+  platforms: [
+    .iOS(.v12),
+    .macOS(.v10_15),
+  ],
+  products: [
+    .library(name: "in-app-purchase-storekit", targets: ["in_app_purchase_storekit"])
+  ],
+  dependencies: [],
+  targets: [
+    .target(
+      name: "in_app_purchase_storekit",
+      dependencies: [
+        "in_app_purchase_storekit_objc"
+      ],
+      resources: [
+        .process("Resources/PrivacyInfo.xcprivacy")
+      ]
+    ),
+    .target(
+      name: "in_app_purchase_storekit_objc",
+      dependencies: [],
+      publicHeadersPath: "include/in_app_purchase_storekit_objc",
+      cSettings: [
+        .headerSearchPath("include/in_app_purchase_storekit_objc")
+      ]
+    ),
+  ]
+)

packages/in_app_purchase/in_app_purchase_storekit/darwin/in_app_purchase_storekit/Package.swift

@@ -5,6 +5,10 @@
 import Foundation
 import StoreKit
 
+#if canImport(in_app_purchase_storekit_objc)
+  import in_app_purchase_storekit_objc
+#endif
+
 #if os(iOS)
   import Flutter
 #elseif os(macOS)
@@ -241,7 +245,7 @@ public class InAppPurchasePlugin: NSObject, FlutterPlugin, FIAInAppPurchaseAPI {
 
     // TODO(louisehsu): This is a workaround for objc pigeon's NSNull support. Once we move to swift pigeon, this can be removed.
     let castedFinishMap: [String: String] = finishMap.compactMapValues { value in
-      if let _ = value as? NSNull {
+      if value as? NSNull != nil {
         return nil
       } else if let stringValue = value as? String {
         return stringValue

packages/in_app_purchase/in_app_purchase_storekit/darwin/Classes/InAppPurchasePlugin.swift renamed to packages/in_app_purchase/in_app_purchase_storekit/darwin/in_app_purchase_storekit/Sources/in_app_purchase_storekit/InAppPurchasePlugin.swift

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import StoreKit
+
 @available(iOS 15.0, macOS 12.0, *)
 extension InAppPurchasePlugin: InAppPurchase2API {
 

packages/in_app_purchase/in_app_purchase_storekit/darwin/Resources/PrivacyInfo.xcprivacy renamed to packages/in_app_purchase/in_app_purchase_storekit/darwin/in_app_purchase_storekit/Sources/in_app_purchase_storekit/Resources/PrivacyInfo.xcprivacy

@@ -1,7 +1,7 @@
 // Copyright 2013 The Flutter Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
-// Autogenerated from Pigeon (v22.6.0), do not edit directly.
+// Autogenerated from Pigeon (v22.7.3), do not edit directly.
 // See also: https://pub.dev/packages/pigeon
 
 import Foundation
@@ -392,7 +392,7 @@ struct SK2ErrorMessage {
   }
 }
 
-private class sk2_pigeonPigeonCodecReader: FlutterStandardReader {
+private class Sk2PigeonPigeonCodecReader: FlutterStandardReader {
   override func readValue(ofType type: UInt8) -> Any? {
     switch type {
     case 129:
@@ -447,7 +447,7 @@ private class sk2_pigeonPigeonCodecReader: FlutterStandardReader {
   }
 }
 
-private class sk2_pigeonPigeonCodecWriter: FlutterStandardWriter {
+private class Sk2PigeonPigeonCodecWriter: FlutterStandardWriter {
   override func writeValue(_ value: Any) {
     if let value = value as? SK2ProductTypeMessage {
       super.writeByte(129)
@@ -494,18 +494,18 @@ private class sk2_pigeonPigeonCodecWriter: FlutterStandardWriter {
   }
 }
 
-private class sk2_pigeonPigeonCodecReaderWriter: FlutterStandardReaderWriter {
+private class Sk2PigeonPigeonCodecReaderWriter: FlutterStandardReaderWriter {
   override func reader(with data: Data) -> FlutterStandardReader {
-    return sk2_pigeonPigeonCodecReader(data: data)
+    return Sk2PigeonPigeonCodecReader(data: data)
   }
 
   override func writer(with data: NSMutableData) -> FlutterStandardWriter {
-    return sk2_pigeonPigeonCodecWriter(data: data)
+    return Sk2PigeonPigeonCodecWriter(data: data)
   }
 }
 
-class sk2_pigeonPigeonCodec: FlutterStandardMessageCodec, @unchecked Sendable {
-  static let shared = sk2_pigeonPigeonCodec(readerWriter: sk2_pigeonPigeonCodecReaderWriter())
+class Sk2PigeonPigeonCodec: FlutterStandardMessageCodec, @unchecked Sendable {
+  static let shared = Sk2PigeonPigeonCodec(readerWriter: Sk2PigeonPigeonCodecReaderWriter())
 }
 
 /// Generated protocol from Pigeon that represents a handler of messages from Flutter.
@@ -525,11 +525,11 @@ protocol InAppPurchase2API {
 
 /// Generated setup class from Pigeon to handle messages through the `binaryMessenger`.
 class InAppPurchase2APISetup {
-  static var codec: FlutterStandardMessageCodec { sk2_pigeonPigeonCodec.shared }
+  static var codec: FlutterStandardMessageCodec { Sk2PigeonPigeonCodec.shared }
   /// Sets up an instance of `InAppPurchase2API` to handle messages through the `binaryMessenger`.
   static func setUp(
-    binaryMessenger: FlutterBinaryMessenger,
-    api: InAppPurchase2API?, messageChannelSuffix: String = ""
+    binaryMessenger: FlutterBinaryMessenger, api: InAppPurchase2API?,
+    messageChannelSuffix: String = ""
   ) {
     let channelSuffix = messageChannelSuffix.count > 0 ? ".\(messageChannelSuffix)" : ""
     let canMakePaymentsChannel = FlutterBasicMessageChannel(
@@ -691,8 +691,8 @@ class InAppPurchase2CallbackAPI: InAppPurchase2CallbackAPIProtocol {
     self.binaryMessenger = binaryMessenger
     self.messageChannelSuffix = messageChannelSuffix.count > 0 ? ".\(messageChannelSuffix)" : ""
   }
-  var codec: sk2_pigeonPigeonCodec {
-    return sk2_pigeonPigeonCodec.shared
+  var codec: Sk2PigeonPigeonCodec {
+    return Sk2PigeonPigeonCodec.shared
   }
   func onTransactionsUpdated(
     newTransactions newTransactionsArg: [SK2TransactionMessage],

packages/in_app_purchase/in_app_purchase_storekit/darwin/Classes/StoreKit2/InAppPurchasePlugin+StoreKit2.swift renamed to packages/in_app_purchase/in_app_purchase_storekit/darwin/in_app_purchase_storekit/Sources/in_app_purchase_storekit/StoreKit2/InAppPurchasePlugin+StoreKit2.swift

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#import "FIAObjectTranslator.h"
+#import "./include/in_app_purchase_storekit_objc/FIAObjectTranslator.h"
 
 #pragma mark - SKProduct Coders