Improve in-app purchase for MacOS (#12464)

* Add methods to finish transactions

* Add a method to get the product descriptions from the App Store

* Improve the documentation of a transaction structure

* Add a tutorial for In App Purchase

* Fix typo in In-App Purchase tutorial

* Fix style of In-App Purchase files

* Fix In-App-Purchase product structure conversion in amr64

* Fix code style in In-App Purchase tutorial documentation

* Fix typos in In-App Purchase documentation

* Fix typo in In-App Purchase spec

* Slight style fixes

atom/browser/mac/in_app_purchase.h

@@ -19,6 +19,10 @@ typedef base::Callback<void(bool isProductValid)> InAppPurchaseCallback;
 
 bool CanMakePayments(void);
 
+void FinishAllTransactions(void);
+
+void FinishTransactionByDate(const std::string& date);
+
 std::string GetReceiptURL(void);
 
 void PurchaseProduct(const std::string& productID,

atom/browser/mac/in_app_purchase.mm

@@ -136,6 +136,34 @@ bool CanMakePayments() {
   return [SKPaymentQueue canMakePayments];
 }
 
+void FinishAllTransactions() {
+  for (SKPaymentTransaction* transaction in SKPaymentQueue.defaultQueue
+           .transactions) {
+    [[SKPaymentQueue defaultQueue] finishTransaction:transaction];
+  }
+}
+
+void FinishTransactionByDate(const std::string& date) {
+  // Create the date formatter.
+  NSDateFormatter* dateFormatter = [[NSDateFormatter alloc] init];
+  NSLocale* enUSPOSIXLocale =
+      [NSLocale localeWithLocaleIdentifier:@"en_US_POSIX"];
+  [dateFormatter setLocale:enUSPOSIXLocale];
+  [dateFormatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ssZZZZZ"];
+
+  // Remove the transaction.
+  NSString* transactionDate = base::SysUTF8ToNSString(date);
+
+  for (SKPaymentTransaction* transaction in SKPaymentQueue.defaultQueue
+           .transactions) {
+    if ([transactionDate
+            isEqualToString:[dateFormatter
+                                stringFromDate:transaction.transactionDate]]) {
+      [[SKPaymentQueue defaultQueue] finishTransaction:transaction];
+    }
+  }
+}
+
 std::string GetReceiptURL() {
   NSURL* receiptURL = [[NSBundle mainBundle] appStoreReceiptURL];
   if (receiptURL != nil) {

atom/browser/mac/in_app_purchase_observer.mm

@@ -17,9 +17,8 @@
 
 namespace {
 
-using InAppTransactionCallback =
-    base::RepeatingCallback<
-        void(const std::vector<in_app_purchase::Transaction>&)>;
+using InAppTransactionCallback = base::RepeatingCallback<void(
+    const std::vector<in_app_purchase::Transaction>&)>;
 
 }  // namespace
 
@@ -72,8 +71,8 @@ using InAppTransactionCallback =
   }
 
   // Send the callback to the browser thread.
-  content::BrowserThread::PostTask(
-      content::BrowserThread::UI, FROM_HERE, base::Bind(callback_, converted));
+  content::BrowserThread::PostTask(content::BrowserThread::UI, FROM_HERE,
+                                   base::Bind(callback_, converted));
 }
 
 /**
@@ -141,9 +140,9 @@ using InAppTransactionCallback =
   }
 
   if (transaction.transactionState < 5) {
-    transactionStruct.transactionState = [[@[
-        @"purchasing", @"purchased", @"failed", @"restored", @"deferred"
-    ] objectAtIndex:transaction.transactionState] UTF8String];
+    transactionStruct.transactionState =
+        [[@[ @"purchasing", @"purchased", @"failed", @"restored", @"deferred" ]
+            objectAtIndex:transaction.transactionState] UTF8String];
   }
 
   if (transaction.payment != nil) {
@@ -177,8 +176,8 @@ namespace in_app_purchase {
 
 TransactionObserver::TransactionObserver() : weak_ptr_factory_(this) {
   obeserver_ = [[InAppTransactionObserver alloc]
-     initWithCallback:base::Bind(&TransactionObserver::OnTransactionsUpdated,
-                                 weak_ptr_factory_.GetWeakPtr())];
+      initWithCallback:base::Bind(&TransactionObserver::OnTransactionsUpdated,
+                                  weak_ptr_factory_.GetWeakPtr())];
 }
 
 TransactionObserver::~TransactionObserver() {

atom/browser/mac/in_app_purchase_product.h

@@ -0,0 +1,47 @@
+// Copyright (c) 2018 Amaplex Software, Inc.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#ifndef ATOM_BROWSER_MAC_IN_APP_PURCHASE_PRODUCT_H_
+#define ATOM_BROWSER_MAC_IN_APP_PURCHASE_PRODUCT_H_
+
+#include <string>
+#include <vector>
+
+#include "base/callback.h"
+
+namespace in_app_purchase {
+
+// --------------------------- Structures ---------------------------
+
+struct Product {
+  // Product Identifier
+  std::string productIdentifier;
+
+  // Product Attributes
+  std::string localizedDescription;
+  std::string localizedTitle;
+  std::string contentVersion;
+  std::vector<uint32_t> contentLengths;
+
+  // Pricing Information
+  double price = 0.0;
+  std::string formattedPrice;
+
+  // Downloadable Content Information
+  bool downloadable = false;
+};
+
+// --------------------------- Typedefs ---------------------------
+
+typedef base::Callback<void(const std::vector<in_app_purchase::Product>&)>
+    InAppPurchaseProductsCallback;
+
+// --------------------------- Functions ---------------------------
+
+void GetProducts(const std::vector<std::string>& productIDs,
+                 const InAppPurchaseProductsCallback& callback);
+
+}  // namespace in_app_purchase
+
+#endif  // ATOM_BROWSER_MAC_IN_APP_PURCHASE_PRODUCT_H_

atom/browser/mac/in_app_purchase_product.mm

@@ -0,0 +1,179 @@
+// Copyright (c) 2017 Amaplex Software, Inc.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#include "atom/browser/mac/in_app_purchase_product.h"
+
+#include "base/bind.h"
+#include "base/strings/sys_string_conversions.h"
+#include "content/public/browser/browser_thread.h"
+
+#import <StoreKit/StoreKit.h>
+
+// ============================================================================
+//                             InAppPurchaseProduct
+// ============================================================================
+
+// --------------------------------- Interface --------------------------------
+
+@interface InAppPurchaseProduct : NSObject<SKProductsRequestDelegate> {
+ @private
+  in_app_purchase::InAppPurchaseProductsCallback callback_;
+}
+
+- (id)initWithCallback:
+    (const in_app_purchase::InAppPurchaseProductsCallback&)callback;
+
+@end
+
+// ------------------------------- Implementation -----------------------------
+
+@implementation InAppPurchaseProduct
+
+/**
+ * Init with a callback.
+ *
+ * @param callback - The callback that will be called to return the products.
+ */
+- (id)initWithCallback:
+    (const in_app_purchase::InAppPurchaseProductsCallback&)callback {
+  if ((self = [super init])) {
+    callback_ = callback;
+  }
+
+  return self;
+}
+
+/**
+ * Return products.
+ *
+ * @param productIDs - The products' id to fetch.
+ */
+- (void)getProducts:(NSSet*)productIDs {
+  SKProductsRequest* productsRequest;
+  productsRequest =
+      [[SKProductsRequest alloc] initWithProductIdentifiers:productIDs];
+
+  productsRequest.delegate = self;
+  [productsRequest start];
+}
+
+/**
+ * @see SKProductsRequestDelegate
+ */
+- (void)productsRequest:(SKProductsRequest*)request
+     didReceiveResponse:(SKProductsResponse*)response {
+  // Release request object.
+  [request release];
+
+  // Get the products.
+  NSArray* products = response.products;
+
+  // Convert the products.
+  std::vector<in_app_purchase::Product> converted;
+  converted.reserve([products count]);
+
+  for (SKProduct* product in products) {
+    converted.push_back([self skProductToStruct:product]);
+  }
+
+  // Send the callback to the browser thread.
+  content::BrowserThread::PostTask(content::BrowserThread::UI, FROM_HERE,
+                                   base::Bind(callback_, converted));
+
+  [self release];
+}
+
+/**
+ * Format local price.
+ *
+ * @param price - The price to format.
+ * @param priceLocal - The local format.
+ */
+- (NSString*)formatPrice:(NSDecimalNumber*)price
+               withLocal:(NSLocale*)priceLocal {
+  NSNumberFormatter* numberFormatter = [[NSNumberFormatter alloc] init];
+
+  [numberFormatter setFormatterBehavior:NSNumberFormatterBehavior10_4];
+  [numberFormatter setNumberStyle:NSNumberFormatterCurrencyStyle];
+  [numberFormatter setLocale:priceLocal];
+
+  return [numberFormatter stringFromNumber:price];
+}
+
+/**
+ * Convert a skProduct object to Product structure.
+ *
+ * @param product - The SKProduct object to convert.
+ */
+- (in_app_purchase::Product)skProductToStruct:(SKProduct*)product {
+  in_app_purchase::Product productStruct;
+
+  // Product Identifier
+  if (product.productIdentifier != nil) {
+    productStruct.productIdentifier = [product.productIdentifier UTF8String];
+  }
+
+  // Product Attributes
+  if (product.localizedDescription != nil) {
+    productStruct.localizedDescription =
+        [product.localizedDescription UTF8String];
+  }
+  if (product.localizedTitle != nil) {
+    productStruct.localizedTitle = [product.localizedTitle UTF8String];
+  }
+  if (product.contentVersion != nil) {
+    productStruct.contentVersion = [product.contentVersion UTF8String];
+  }
+  if (product.contentLengths != nil) {
+    productStruct.contentLengths.reserve([product.contentLengths count]);
+
+    for (NSNumber* contentLength in product.contentLengths) {
+      productStruct.contentLengths.push_back([contentLength longLongValue]);
+    }
+  }
+
+  // Pricing Information
+  if (product.price != nil) {
+    productStruct.price = [product.price doubleValue];
+
+    if (product.priceLocale != nil) {
+      productStruct.formattedPrice =
+          [[self formatPrice:product.price withLocal:product.priceLocale]
+              UTF8String];
+    }
+  }
+
+  // Downloadable Content Information
+  if (product.downloadable == true) {
+    productStruct.downloadable = true;
+  }
+
+  return productStruct;
+}
+
+@end
+
+// ============================================================================
+//                             C++ in_app_purchase
+// ============================================================================
+
+namespace in_app_purchase {
+
+void GetProducts(const std::vector<std::string>& productIDs,
+                 const InAppPurchaseProductsCallback& callback) {
+  auto* iapProduct = [[InAppPurchaseProduct alloc] initWithCallback:callback];
+
+  // Convert the products' id to NSSet.
+  NSMutableSet* productsIDSet =
+      [NSMutableSet setWithCapacity:productIDs.size()];
+
+  for (auto& productID : productIDs) {
+    [productsIDSet addObject:base::SysUTF8ToNSString(productID)];
+  }
+
+  // Fetch the products.
+  [iapProduct getProducts:productsIDSet];
+}
+
+}  // namespace in_app_purchase