dom/payments/PaymentRequestUtils.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "js/JSON.h"
   8 #include "nsContentUtils.h"
   9 #include "nsArrayUtils.h"
  10 #include "nsTString.h"
  11 #include "PaymentRequestUtils.h"
  12
  13 namespace mozilla::dom {
  14
  15 nsresult SerializeFromJSObject(JSContext* aCx, JS::Handle<JSObject*> aObject,
  16                                nsAString& aSerializedObject) {
  17   MOZ_ASSERT(aCx);
  18   JS::Rooted<JS::Value> value(aCx, JS::ObjectValue(*aObject));
  19   return SerializeFromJSVal(aCx, value, aSerializedObject);
  20 }
  21
  22 nsresult SerializeFromJSVal(JSContext* aCx, JS::Handle<JS::Value> aValue,
  23                             nsAString& aSerializedValue) {
  24   aSerializedValue.Truncate();
  25   NS_ENSURE_TRUE(nsContentUtils::StringifyJSON(aCx, aValue, aSerializedValue,
  26                                                UndefinedIsNullStringLiteral),
  27                  NS_ERROR_XPC_BAD_CONVERT_JS);
  28   NS_ENSURE_TRUE(!aSerializedValue.IsEmpty(), NS_ERROR_FAILURE);
  29   return NS_OK;
  30 }
  31
  32 nsresult DeserializeToJSObject(const nsAString& aSerializedObject,
  33                                JSContext* aCx,
  34                                JS::MutableHandle<JSObject*> aObject) {
  35   MOZ_ASSERT(aCx);
  36   JS::Rooted<JS::Value> value(aCx);
  37   nsresult rv = DeserializeToJSValue(aSerializedObject, aCx, &value);
  38   if (NS_WARN_IF(NS_FAILED(rv))) {
  39     return rv;
  40   }
  41   if (value.isObject()) {
  42     aObject.set(&value.toObject());
  43   } else {
  44     aObject.set(nullptr);
  45   }
  46   return NS_OK;
  47 }
  48
  49 nsresult DeserializeToJSValue(const nsAString& aSerializedObject,
  50                               JSContext* aCx,
  51                               JS::MutableHandle<JS::Value> aValue) {
  52   MOZ_ASSERT(aCx);
  53   if (!JS_ParseJSON(aCx, aSerializedObject.BeginReading(),
  54                     aSerializedObject.Length(), aValue)) {
  55     return NS_ERROR_UNEXPECTED;
  56   }
  57   return NS_OK;
  58 }
  59
  60 }  // namespace mozilla::dom