Chrome Cloud Messaging

chrome/browser/extensions/api/push_messaging/invalidation_handler.cc

+// Copyright (c) 2012 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 "chrome/browser/extensions/api/push_messaging/invalidation_handler.h"
+
+#include <utility>
+#include "base/stringprintf.h"
+#include "chrome/browser/extensions/api/push_messaging/invalidation_handler_observer.h"
+
+namespace extensions {
+
+namespace {
+// TODO(dcheng): Use the chrome components source ID.
+const int kSourceId = 0xBAD;
+const int kNumberOfSubchannels = 4;
+
+// TODO(dcheng): The current Chrome component ID format is as follows:
+// <1 byte> - format type
+// The following bytes are dependent on the format type. We assume format type
+// "U" for the purpose of this comment:
+// <8 byte> - GAIA ID - invisible to client as it is munged server-side.
+// <2 byte> - project ID (I use AM for Apps Messaging)
+// <4 byte> - used for the subchannel for apps messaging.
+// <everything else> - extension ID for apps messaging.
+syncer::ObjectIdSet ExtensionIdToObjectIds(const std::string& extension_id) {
+  syncer::ObjectIdSet object_ids;
+  for (int i = 0; i < kNumberOfSubchannels; ++i) {
+    std::string id = base::StringPrintf(
+        "%c%s%04d%s",
+        'U',  // TODO(dcheng): We need to define a new format type.
+        "AM",  // Project ID
+        i,  // Subchannel ID
+        extension_id.c_str());
+    object_ids.insert(invalidation::ObjectId(kSourceId, id));
+  }
+  return object_ids;
+}
+}  // namespace
+
+InvalidationHandler::InvalidationHandler(InvalidationHandlerObserver* observer)
+    : observer_(observer) {
+  DCHECK(observer);
+  // The constructor will eventually take a ProfileSyncService to register
+  // against.
+}
+
+InvalidationHandler::~InvalidationHandler() {
+  // Eventually, we'll want to unregister from the profile sync service here.
+  // ... or assert that we're not registered.
+}
+
+void InvalidationHandler::RegisterExtension(const std::string& id) {
+  const syncer::ObjectIdSet& ids = ExtensionIdToObjectIds(id);
+  for (syncer::ObjectIdSet::const_iterator it = ids.begin();
+       it != ids.end(); ++it) {
+    registered_entries_.insert(std::make_pair(*it, InvalidationRecord()));
+  }
+  // TODO(dcheng): Update registrations here once akalin's patch has landed.
+}
+
+void InvalidationHandler::UnregisterExtension(const std::string& id) {
+  const syncer::ObjectIdSet& ids = ExtensionIdToObjectIds(id);
+  // TODO(dcheng): Cancel things that are in flight.
+  for (syncer::ObjectIdSet::const_iterator it = ids.begin();
+       it != ids.end(); ++it) {
+    registered_entries_.erase(*it);
+  }
+  // TODO(dcheng): Update registrations here once akalin's patch has landed.
+}
+
+void InvalidationHandler::OnIncomingNotification(
+    const syncer::ObjectIdPayloadMap& id_payloads,
+    syncer::IncomingNotificationSource source) {
+  // Map it.
+  // Dispatch it.
+  // Record it.
+}
+
+void InvalidationHandler::OnNotificationsEnabled() {
+}
+
+void InvalidationHandler::OnNotificationsDisabled(
+    syncer::NotificationsDisabledReason reason) {
+}
+
+}  // namespace extensions