Implement BackgroundFetchManager.fetch() and struct traits

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

 // 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/BackgroundFetchManager.h"
 
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "bindings/core/v8/ScriptState.h"
 #include "bindings/core/v8/V8ThrowException.h"
+#include "core/dom/DOMException.h"
+#include "core/dom/ExceptionCode.h"
 #include "modules/background_fetch/BackgroundFetchBridge.h"
 #include "modules/background_fetch/BackgroundFetchOptions.h"
 #include "modules/background_fetch/BackgroundFetchRegistration.h"
 #include "modules/serviceworkers/ServiceWorkerRegistration.h"
 
 namespace blink {
 
 BackgroundFetchManager::BackgroundFetchManager(
     ServiceWorkerRegistration* registration)
     : m_registration(registration) {
@@ skipping 10 matching lines @@
     return ScriptPromise::reject(
         scriptState,
         V8ThrowException::createTypeError(scriptState->isolate(),
                                           "No active registration available on "
                                           "the ServiceWorkerRegistration."));
   }
 
   ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState);
   ScriptPromise promise = resolver->promise();
 
-  // TODO(peter): Register the fetch() with the browser process. The reject
-  // cases there are storage errors and duplicated registrations for the `tag`
-  // given the `m_registration`.
-  BackgroundFetchRegistration* registration = new BackgroundFetchRegistration(
-      m_registration.get(), tag, options.icons(), options.totalDownloadSize(),
-      options.title());
+  // TODO(peter): Include the |requests| in the Mojo call.
 
-  resolver->resolve(registration);
+  m_bridge->fetch(tag, options,
+                  WTF::bind(&BackgroundFetchManager::didFetch,
+                            wrapPersistent(this), wrapPersistent(resolver)));
 
   return promise;
 }
 
+void BackgroundFetchManager::didFetch(
+    ScriptPromiseResolver* resolver,
+    mojom::blink::BackgroundFetchError error,
+    BackgroundFetchRegistration* registration) {
+  switch (error) {
+    case mojom::blink::BackgroundFetchError::NONE:
+      DCHECK(registration);
+      resolver->resolve(registration);
+      return;
+    case mojom::blink::BackgroundFetchError::DUPLICATED_TAG:
+      DCHECK(!registration);
+      resolver->reject(DOMException::create(
+          InvalidStateError,
+          "There already is a registration for the given tag."));
+      return;
+    case mojom::blink::BackgroundFetchError::INVALID_TAG:
+      // Not applicable for this callback.
+      break;
+  }
+
+  NOTREACHED();
+}
+
 ScriptPromise BackgroundFetchManager::get(ScriptState* scriptState,
                                           const String& tag) {
   if (!m_registration->active()) {
     return ScriptPromise::reject(
         scriptState,
         V8ThrowException::createTypeError(scriptState->isolate(),
                                           "No active registration available on "
                                           "the ServiceWorkerRegistration."));
   }
 
@@ skipping 58 matching lines @@
 
   NOTREACHED();
 }
 
 DEFINE_TRACE(BackgroundFetchManager) {
   visitor->trace(m_registration);
   visitor->trace(m_bridge);
 }
 
 }  // namespace blink