Revert 221619 "Initial chrome.mdns API."

trunk/src/chrome/browser/extensions/api/mdns/mdns_api.cc

-// Copyright 2013 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/mdns/mdns_api.h"
-
-#include <vector>
-
-#include "base/lazy_instance.h"
-#include "chrome/browser/extensions/extension_service.h"
-#include "chrome/browser/extensions/extension_system.h"
-#include "chrome/common/extensions/api/mdns.h"
-
-namespace extensions {
-
-namespace mdns = api::mdns;
-
-namespace {
-
-// Whitelisted mDNS service types.
-const char kCastServiceType[] = "_googlecast._tcp.local";
-const char kTestServiceType[] = "_testing._tcp.local";
-
-bool IsServiceTypeWhitelisted(const std::string& service_type) {
-  return service_type == kCastServiceType ||
-         service_type == kTestServiceType;
-}
-
-}  // namespace
-
-MDnsAPI::MDnsAPI(Profile* profile) : profile_(profile) {
-  DCHECK(profile_);
-  ExtensionSystem::Get(profile)->event_router()->RegisterObserver(
-      this, mdns::OnServiceList::kEventName);
-}
-
-MDnsAPI::~MDnsAPI() {
-  if (dns_sd_registry_.get()) {
-    dns_sd_registry_->RemoveObserver(this);
-  }
-}
-
-// static
-MDnsAPI* MDnsAPI::Get(Profile* profile) {
-  return ProfileKeyedAPIFactory<MDnsAPI>::GetForProfile(profile);
-}
-
-static base::LazyInstance<ProfileKeyedAPIFactory<MDnsAPI> > g_factory =
-    LAZY_INSTANCE_INITIALIZER;
-
-// static
-ProfileKeyedAPIFactory<MDnsAPI>* MDnsAPI::GetFactoryInstance() {
-  return &g_factory.Get();
-}
-
-void MDnsAPI::SetDnsSdRegistryForTesting(
-    scoped_ptr<DnsSdRegistry> dns_sd_registry) {
-  dns_sd_registry_ = dns_sd_registry.Pass();
-}
-
-DnsSdRegistry* MDnsAPI::dns_sd_registry() {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  if (!dns_sd_registry_.get()) {
-    dns_sd_registry_.reset(new extensions::DnsSdRegistry());
-    dns_sd_registry_->AddObserver(this);
-  }
-  return dns_sd_registry_.get();
-}
-
-void MDnsAPI::OnListenerAdded(const EventListenerInfo& details) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  UpdateMDnsListeners(details);
-}
-
-void MDnsAPI::OnListenerRemoved(const EventListenerInfo& details) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  UpdateMDnsListeners(details);
-}
-
-void MDnsAPI::UpdateMDnsListeners(const EventListenerInfo& details) {
-  std::set<std::string> new_service_types;
-
-  // Check all listeners for service type filers.
-  const EventListenerMap::ListenerList& listeners =
-      extensions::ExtensionSystem::Get(profile_)->event_router()->
-          listeners().GetEventListenersByName(details.event_name);
-  for (EventListenerMap::ListenerList::const_iterator it = listeners.begin();
-       it != listeners.end(); ++it) {
-    base::DictionaryValue* filter = ((*it)->filter.get());
-    for (base::DictionaryValue::Iterator iter(*filter);
-       !iter.IsAtEnd(); iter.Advance()) {
-    }
-
-    std::string filter_value;
-    filter->GetStringASCII(kEventFilterServiceTypeKey, &filter_value);
-    if (filter_value.empty())
-      continue;
-
-    new_service_types.insert(filter_value);
-  }
-
-  // Find all the added and removed service types since last update.
-  std::set<std::string> added_service_types =
-      base::STLSetDifference<std::set<std::string> >(
-          service_types_, new_service_types);
-  std::set<std::string> removed_service_types =
-      base::STLSetDifference<std::set<std::string> >(
-          new_service_types, service_types_);
-
-  // Update the registry.
-  DnsSdRegistry* registry = dns_sd_registry();
-  for (std::set<std::string>::iterator it = added_service_types.begin();
-       it != added_service_types.end(); ++it) {
-    if (IsServiceTypeWhitelisted(*it))
-      registry->RegisterDnsSdListener(*it);
-  }
-  for (std::set<std::string>::iterator it = removed_service_types.begin();
-       it != removed_service_types.end(); ++it) {
-    if (IsServiceTypeWhitelisted(*it))
-      registry->UnregisterDnsSdListener(*it);
-  }
-
-  service_types_ = new_service_types;
-}
-
-void MDnsAPI::OnDnsSdEvent(const std::string& service_type,
-                           const DnsSdRegistry::DnsSdServiceList& services) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  if (services.size() == 0)
-    return;
-
-  std::vector<linked_ptr<mdns::MDnsService> > args;
-  for (DnsSdRegistry::DnsSdServiceList::const_iterator it = services.begin();
-       it != services.end(); ++it) {
-    linked_ptr<mdns::MDnsService> mdns_service =
-        make_linked_ptr(new mdns::MDnsService);
-    // TODO(justinlin, mfoltz): Copy data from service list.
-    mdns_service->service_name = service_type;
-    args.push_back(mdns_service);
-  }
-
-  scoped_ptr<base::ListValue> results = mdns::OnServiceList::Create(args);
-  scoped_ptr<Event> event(
-      new Event(mdns::OnServiceList::kEventName, results.Pass()));
-  event->restrict_to_profile = profile_;
-  event->filter_info.SetServiceType(service_type);
-
-  // TODO(justinlin): To avoid having listeners without filters getting all
-  // events, modify API to have this event require filters.
-  extensions::ExtensionSystem::Get(profile_)->event_router()->
-      BroadcastEvent(event.Pass());
-}
-
-}  // namespace extensions