Implement a Mojo service for Background Fetch

third_party/WebKit/Source/modules/background_fetch/BackgroundFetchBridge.cpp

Index: third_party/WebKit/Source/modules/background_fetch/BackgroundFetchBridge.cpp
diff --git a/third_party/WebKit/Source/modules/background_fetch/BackgroundFetchBridge.cpp b/third_party/WebKit/Source/modules/background_fetch/BackgroundFetchBridge.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..ef89640d0c848985c086ad7795aa43295e7fecae
--- /dev/null
+++ b/third_party/WebKit/Source/modules/background_fetch/BackgroundFetchBridge.cpp
@@ -0,0 +1,123 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "modules/background_fetch/BackgroundFetchBridge.h"
+
+#include <utility>
+#include "modules/background_fetch/BackgroundFetchOptions.h"
+#include "modules/background_fetch/BackgroundFetchRegistration.h"
+#include "modules/background_fetch/IconDefinition.h"
+#include "public/platform/InterfaceProvider.h"
+#include "public/platform/Platform.h"
+#include "public/platform/modules/serviceworker/WebServiceWorkerRegistration.h"
+
+namespace blink {
+
+namespace {
+
+// Creates a new BackgroundFetchRegistration instance given a Service Worker
+// Registration and a Mojo BackgroundFetchRegistrationPtr instance.
+BackgroundFetchRegistration* CreateBackgroundFetchRegistration(
+    ServiceWorkerRegistration* serviceWorkerRegistration,
+    mojom::blink::BackgroundFetchRegistrationPtr registrationPtr) {
+  HeapVector<IconDefinition> icons;
+
+  for (const auto& iconPtr : registrationPtr->icons) {
+    IconDefinition icon;
+    icon.setSrc(iconPtr->src);
+    icon.setSizes(iconPtr->sizes);
+    icon.setType(iconPtr->type);
+
+    icons.push_back(icon);
+  }
+
+  return new BackgroundFetchRegistration(
+      serviceWorkerRegistration, registrationPtr->tag, std::move(icons),
+      registrationPtr->total_download_size, registrationPtr->title);
+}
+
+}  // namespace
+
+// static
+BackgroundFetchBridge* BackgroundFetchBridge::from(
+    ServiceWorkerRegistration* serviceWorkerRegistration) {
+  DCHECK(serviceWorkerRegistration);
+
+  BackgroundFetchBridge* bridge = static_cast<BackgroundFetchBridge*>(
+      Supplement<ServiceWorkerRegistration>::from(serviceWorkerRegistration,
+                                                  supplementName()));
+
+  if (!bridge) {
+    bridge = new BackgroundFetchBridge(*serviceWorkerRegistration);
+    Supplement<ServiceWorkerRegistration>::provideTo(*serviceWorkerRegistration,
+                                                     supplementName(), bridge);
+  }
+
+  return bridge;
+}
+
+// static
+const char* BackgroundFetchBridge::supplementName() {
+  return "BackgroundFetchBridge";
+}
+
+BackgroundFetchBridge::BackgroundFetchBridge(
+    ServiceWorkerRegistration& registration)
+    : Supplement<ServiceWorkerRegistration>(registration) {}
+
+BackgroundFetchBridge::~BackgroundFetchBridge() = default;
+
+void BackgroundFetchBridge::abort(const String& tag) {
+  getService()->Abort(supplementable()->webRegistration()->registrationId(),
+                      tag);
+}
+
+void BackgroundFetchBridge::updateUI(
+    const String& tag,
+    const String& title,
+    std::unique_ptr<UpdateUICallback> callback) {
+  getService()->UpdateUI(supplementable()->webRegistration()->registrationId(),
+                         tag, title,
+                         convertToBaseCallback(std::move(callback)));
+}
+
+void BackgroundFetchBridge::getRegistration(
+    const String& tag,
+    std::unique_ptr<GetRegistrationCallback> callback) {
+  getService()->GetRegistration(
+      supplementable()->webRegistration()->registrationId(), tag,
+      convertToBaseCallback(
+          WTF::bind(&BackgroundFetchBridge::didGetRegistration,
+                    wrapPersistent(this), WTF::passed(std::move(callback)))));
+}
+
+void BackgroundFetchBridge::didGetRegistration(
+    std::unique_ptr<GetRegistrationCallback> callback,
+    mojom::blink::BackgroundFetchError error,
+    mojom::blink::BackgroundFetchRegistrationPtr registrationPtr) {
+  BackgroundFetchRegistration* registration = nullptr;
+
+  if (registrationPtr) {
+    DCHECK_EQ(error, mojom::blink::BackgroundFetchError::NONE);
+    registration = CreateBackgroundFetchRegistration(
+        supplementable(), std::move(registrationPtr));
+  }
+
+  (*callback)(error, registration);
+}
+
+void BackgroundFetchBridge::getTags(std::unique_ptr<GetTagsCallback> callback) {
+  getService()->GetTags(supplementable()->webRegistration()->registrationId(),
+                        convertToBaseCallback(std::move(callback)));
+}
+
+mojom::blink::BackgroundFetchServicePtr& BackgroundFetchBridge::getService() {
+  if (!m_backgroundFetchService) {
+    Platform::current()->interfaceProvider()->getInterface(
+        mojo::MakeRequest(&m_backgroundFetchService));
+  }
+  return m_backgroundFetchService;
+}
+
+}  // namespace blink