Implement a Mojo service for Background Fetch

content/browser/background_fetch/background_fetch_service_impl.cc

+// 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 "content/browser/background_fetch/background_fetch_service_impl.h"
+
+#include "base/logging.h"
+#include "base/memory/ptr_util.h"
+#include "content/browser/background_fetch/background_fetch_context.h"
+#include "content/browser/service_worker/service_worker_context_wrapper.h"
+#include "content/public/browser/browser_thread.h"
+#include "mojo/public/cpp/bindings/strong_binding.h"
+
+namespace content {
+
+// static
+void BackgroundFetchServiceImpl::Create(
+    BackgroundFetchContext* background_fetch_context,
+    ServiceWorkerContextWrapper* service_worker_context,
+    blink::mojom::BackgroundFetchServiceRequest request) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+  mojo::MakeStrongBinding(base::MakeUnique<BackgroundFetchServiceImpl>(
+                              background_fetch_context, service_worker_context),
+                          std::move(request));
+}
+
+BackgroundFetchServiceImpl::BackgroundFetchServiceImpl(
+    BackgroundFetchContext* background_fetch_context,
+    ServiceWorkerContextWrapper* service_worker_context)
+    : background_fetch_context_(background_fetch_context),
+      service_worker_context_(service_worker_context) {
+  DCHECK(background_fetch_context);
+  DCHECK(service_worker_context);
+}
+
+BackgroundFetchServiceImpl::~BackgroundFetchServiceImpl() = default;
+
+void BackgroundFetchServiceImpl::UpdateUI(
+    int64_t service_worker_registration_id,
+    const std::string& tag,
+    const std::string& title,
+    const UpdateUICallback& callback) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+
+  // TODO(peter): Get the BackgroundFetchJobController for the
+  // {service_worker_registration_id, tag} pair and call UpdateUI() on it.
+
+  callback.Run(blink::mojom::BackgroundFetchError::NONE);
+}
+
+void BackgroundFetchServiceImpl::Abort(int64_t service_worker_registration_id,
+                                       const std::string& tag) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+
+  // TODO(peter): Get the BackgroundFetchJobController for the
+  // {service_worker_registration_id, tag} pair and call Abort() on it.
+}
+
+void BackgroundFetchServiceImpl::GetRegistration(
+    int64_t service_worker_registration_id,
+    const std::string& tag,
+    const GetRegistrationCallback& callback) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+
+  // TODO(peter): Get the registration for {service_worker_registration_id, tag}
+  // and construct a BackgroundFetchRegistrationPtr for it.
+
+  callback.Run(blink::mojom::BackgroundFetchError::DUPLICATED_TAG,
+               nullptr /* registration */);
+}
+
+void BackgroundFetchServiceImpl::GetTags(int64_t service_worker_registration_id,
+                                         const GetTagsCallback& callback) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+
+  // TODO(peter): Get the list of active Background Fetches associated with
+  // service_worker_registration_id and share their tags.
+
+  callback.Run(blink::mojom::BackgroundFetchError::NONE,
+               std::vector<std::string>());
+}
+
+}  // namespace content