chrome.bluetooth API improvements.

chrome/browser/extensions/api/bluetooth/bluetooth_event_router.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/bluetooth/bluetooth_event_router.h"
 
 #include <map>
 #include <string>
 
 #include "base/bind.h"
 #include "base/json/json_writer.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_vector.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/extensions/api/bluetooth/bluetooth_api_utils.h"
+#include "chrome/browser/extensions/extension_host.h"
 #include "chrome/common/extensions/api/bluetooth.h"
 #include "content/public/browser/notification_details.h"
 #include "content/public/browser/notification_source.h"
 #include "device/bluetooth/bluetooth_adapter.h"
 #include "device/bluetooth/bluetooth_adapter_factory.h"
 #include "device/bluetooth/bluetooth_device.h"
 #include "device/bluetooth/bluetooth_discovery_session.h"
 #include "device/bluetooth/bluetooth_profile.h"
 #include "device/bluetooth/bluetooth_socket.h"
 #include "extensions/browser/event_router.h"
 #include "extensions/browser/extension_system.h"
 
 namespace extensions {
 
 namespace bluetooth = api::bluetooth;
 
-// A struct storing a Bluetooth socket and the extension that added it.
-struct ExtensionBluetoothSocketRecord {
-  std::string extension_id;
-  scoped_refptr<device::BluetoothSocket> socket;
-};
-
 // A struct storing a Bluetooth profile and the extension that added it.
 struct ExtensionBluetoothProfileRecord {
   std::string extension_id;
   device::BluetoothProfile* profile;
 };
 
 ExtensionBluetoothEventRouter::ExtensionBluetoothEventRouter(
     content::BrowserContext* context)
     : browser_context_(context),
       adapter_(NULL),
       num_event_listeners_(0),
-      next_socket_id_(1),
       weak_ptr_factory_(this) {
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
   DCHECK(browser_context_);
   registrar_.Add(this,
                  chrome::NOTIFICATION_EXTENSION_UNLOADED,
                  content::Source<content::BrowserContext>(browser_context_));
+  registrar_.Add(this,
+                 chrome::NOTIFICATION_EXTENSION_HOST_DESTROYED,
+                 content::Source<content::BrowserContext>(browser_context_));
 }
 
 ExtensionBluetoothEventRouter::~ExtensionBluetoothEventRouter() {
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
   if (adapter_.get()) {
     adapter_->RemoveObserver(this);
     adapter_ = NULL;
   }
-  DLOG_IF(WARNING, socket_map_.size() != 0)
-      << "Bluetooth sockets are still open.";
-  socket_map_.clear();
-
   for (BluetoothProfileMap::iterator iter = bluetooth_profile_map_.begin();
        iter != bluetooth_profile_map_.end();
        ++iter) {
     iter->second.profile->Unregister();
   }
   for (DiscoverySessionMap::iterator iter = discovery_session_map_.begin();
        iter != discovery_session_map_.end();
        ++iter) {
     delete iter->second;
   }
@@ skipping 18 matching lines @@
   num_event_listeners_++;
   InitializeAdapterIfNeeded();
 }
 
 void ExtensionBluetoothEventRouter::OnListenerRemoved() {
   if (num_event_listeners_ > 0)
     num_event_listeners_--;
   MaybeReleaseAdapter();
 }
 
-int ExtensionBluetoothEventRouter::RegisterSocket(
-    const std::string& extension_id,
-    scoped_refptr<device::BluetoothSocket> socket) {
-  // If there is a socket registered with the same fd, just return it's id
-  for (SocketMap::const_iterator i = socket_map_.begin();
-      i != socket_map_.end(); ++i) {
-    if (i->second.socket.get() == socket.get())
-      return i->first;
-  }
-  int return_id = next_socket_id_++;
-  ExtensionBluetoothSocketRecord record = { extension_id, socket };
-  socket_map_[return_id] = record;
-  return return_id;
-}
-
-bool ExtensionBluetoothEventRouter::ReleaseSocket(int id) {
-  SocketMap::iterator socket_entry = socket_map_.find(id);
-  if (socket_entry == socket_map_.end())
-    return false;
-  socket_map_.erase(socket_entry);
-  return true;
-}
-
 void ExtensionBluetoothEventRouter::AddProfile(
     const std::string& uuid,
     const std::string& extension_id,
     device::BluetoothProfile* bluetooth_profile) {
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
   DCHECK(!HasProfile(uuid));
   ExtensionBluetoothProfileRecord record = { extension_id, bluetooth_profile };
   bluetooth_profile_map_[uuid] = record;
 }
 
 void ExtensionBluetoothEventRouter::RemoveProfile(const std::string& uuid) {
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
   BluetoothProfileMap::iterator iter = bluetooth_profile_map_.find(uuid);
   if (iter != bluetooth_profile_map_.end()) {
     device::BluetoothProfile* bluetooth_profile = iter->second.profile;
     bluetooth_profile_map_.erase(iter);
     bluetooth_profile->Unregister();
   }
 }
 
 bool ExtensionBluetoothEventRouter::HasProfile(const std::string& uuid) const {
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
   return bluetooth_profile_map_.find(uuid) != bluetooth_profile_map_.end();
 }
 
 void ExtensionBluetoothEventRouter::StartDiscoverySession(
     device::BluetoothAdapter* adapter,
     const std::string& extension_id,
     const base::Closure& callback,
     const base::Closure& error_callback) {
   if (adapter != adapter_.get()) {
     error_callback.Run();
@@ skipping 29 matching lines @@
     DVLOG(1) << "No active discovery session exists for extension.";
     error_callback.Run();
     return;
   }
   device::BluetoothDiscoverySession* session = iter->second;
   session->Stop(callback, error_callback);
 }
 
 device::BluetoothProfile* ExtensionBluetoothEventRouter::GetProfile(
     const std::string& uuid) const {
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
   BluetoothProfileMap::const_iterator iter = bluetooth_profile_map_.find(uuid);
   if (iter != bluetooth_profile_map_.end())
     return iter->second.profile;
 
   return NULL;
 }
 
-scoped_refptr<device::BluetoothSocket>
-ExtensionBluetoothEventRouter::GetSocket(int id) {
-  SocketMap::iterator socket_entry = socket_map_.find(id);
-  if (socket_entry == socket_map_.end())
-    return NULL;
-  return socket_entry->second.socket;
-}
-
-void ExtensionBluetoothEventRouter::DispatchConnectionEvent(
-    const std::string& extension_id,
-    const std::string& uuid,
-    const device::BluetoothDevice* device,
-    scoped_refptr<device::BluetoothSocket> socket) {
-  if (!HasProfile(uuid))
-    return;
-
-  int socket_id = RegisterSocket(extension_id, socket);
-  bluetooth::Socket result_socket;
-  bluetooth::BluetoothDeviceToApiDevice(*device, &result_socket.device);
-  result_socket.profile.uuid = uuid;
-  result_socket.id = socket_id;
-
-  scoped_ptr<base::ListValue> args =
-      bluetooth::OnConnection::Create(result_socket);
-  scoped_ptr<Event> event(new Event(
-      bluetooth::OnConnection::kEventName, args.Pass()));
-  ExtensionSystem::Get(browser_context_)
-      ->event_router()
-      ->DispatchEventToExtension(extension_id, event.Pass());
-}
-
 void ExtensionBluetoothEventRouter::AdapterPresentChanged(
     device::BluetoothAdapter* adapter, bool present) {
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
   if (adapter != adapter_.get()) {
     DVLOG(1) << "Ignoring event for adapter " << adapter->GetAddress();
     return;
   }
   DispatchAdapterStateEvent();
 }
 
 void ExtensionBluetoothEventRouter::AdapterPoweredChanged(
     device::BluetoothAdapter* adapter, bool has_power) {
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
   if (adapter != adapter_.get()) {
     DVLOG(1) << "Ignoring event for adapter " << adapter->GetAddress();
     return;
   }
   DispatchAdapterStateEvent();
 }
 
 void ExtensionBluetoothEventRouter::AdapterDiscoveringChanged(
     device::BluetoothAdapter* adapter, bool discovering) {
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
   if (adapter != adapter_.get()) {
     DVLOG(1) << "Ignoring event for adapter " << adapter->GetAddress();
     return;
   }
 
   if (!discovering) {
     // If any discovery sessions are inactive, clean them up.
     DiscoverySessionMap active_session_map;
     for (DiscoverySessionMap::iterator iter = discovery_session_map_.begin();
          iter != discovery_session_map_.end();
          ++iter) {
       device::BluetoothDiscoverySession* session = iter->second;
       if (session->IsActive()) {
         active_session_map[iter->first] = session;
         continue;
       }
       delete session;
     }
     discovery_session_map_.swap(active_session_map);
   }
 
   DispatchAdapterStateEvent();
 }
 
 void ExtensionBluetoothEventRouter::DeviceAdded(
     device::BluetoothAdapter* adapter,
     device::BluetoothDevice* device) {
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
   if (adapter != adapter_.get()) {
     DVLOG(1) << "Ignoring event for adapter " << adapter->GetAddress();
     return;
   }
 
   DispatchDeviceEvent(bluetooth::OnDeviceAdded::kEventName, device);
 }
 
 void ExtensionBluetoothEventRouter::DeviceChanged(
     device::BluetoothAdapter* adapter,
     device::BluetoothDevice* device) {
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
   if (adapter != adapter_.get()) {
     DVLOG(1) << "Ignoring event for adapter " << adapter->GetAddress();
     return;
   }
 
   DispatchDeviceEvent(bluetooth::OnDeviceChanged::kEventName, device);
 }
 
 void ExtensionBluetoothEventRouter::DeviceRemoved(
     device::BluetoothAdapter* adapter,
     device::BluetoothDevice* device) {
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
   if (adapter != adapter_.get()) {
     DVLOG(1) << "Ignoring event for adapter " << adapter->GetAddress();
     return;
   }
 
   DispatchDeviceEvent(bluetooth::OnDeviceRemoved::kEventName, device);
 }
 
 void ExtensionBluetoothEventRouter::InitializeAdapterIfNeeded() {
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
   if (!adapter_.get()) {
     GetAdapter(base::Bind(&ExtensionBluetoothEventRouter::InitializeAdapter,
                           weak_ptr_factory_.GetWeakPtr()));
   }
 }
 
 void ExtensionBluetoothEventRouter::InitializeAdapter(
     scoped_refptr<device::BluetoothAdapter> adapter) {
   if (!adapter_.get()) {
     adapter_ = adapter;
     adapter_->AddObserver(this);
   }
 }
 
 void ExtensionBluetoothEventRouter::MaybeReleaseAdapter() {
   if (adapter_.get() && num_event_listeners_ == 0) {
     adapter_->RemoveObserver(this);
     adapter_ = NULL;
   }
 }
 
 void ExtensionBluetoothEventRouter::DispatchAdapterStateEvent() {
-  bluetooth::AdapterState state;
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
+  api::bluetooth::AdapterState state;
   PopulateAdapterState(*adapter_.get(), &state);
 
   scoped_ptr<base::ListValue> args =
       bluetooth::OnAdapterStateChanged::Create(state);
   scoped_ptr<Event> event(new Event(
       bluetooth::OnAdapterStateChanged::kEventName,
       args.Pass()));
   ExtensionSystem::Get(browser_context_)->event_router()->BroadcastEvent(
       event.Pass());
 }
 
 void ExtensionBluetoothEventRouter::DispatchDeviceEvent(
     const std::string& event_name,
     device::BluetoothDevice* device) {
   bluetooth::Device extension_device;
   bluetooth::BluetoothDeviceToApiDevice(*device, &extension_device);
 
   scoped_ptr<base::ListValue> args =
       bluetooth::OnDeviceAdded::Create(extension_device);
   scoped_ptr<Event> event(new Event(event_name, args.Pass()));
   ExtensionSystem::Get(browser_context_)->event_router()->BroadcastEvent(
       event.Pass());
 }
 
 void ExtensionBluetoothEventRouter::CleanUpForExtension(
     const std::string& extension_id) {
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
   // Remove all profiles added by the extension.
   BluetoothProfileMap::iterator profile_iter = bluetooth_profile_map_.begin();
   while (profile_iter != bluetooth_profile_map_.end()) {
     ExtensionBluetoothProfileRecord record = profile_iter->second;
     if (record.extension_id == extension_id) {
       bluetooth_profile_map_.erase(profile_iter++);
       record.profile->Unregister();
     } else {
       profile_iter++;
     }
   }
 
-  // Remove all sockets opened by the extension.
-  SocketMap::iterator socket_iter = socket_map_.begin();
-  while (socket_iter != socket_map_.end()) {
-    int socket_id = socket_iter->first;
-    ExtensionBluetoothSocketRecord record = socket_iter->second;
-    socket_iter++;
-    if (record.extension_id == extension_id) {
-      ReleaseSocket(socket_id);
-    }
-  }
-
   // Remove any discovery session initiated by the extension.
   DiscoverySessionMap::iterator session_iter =
       discovery_session_map_.find(extension_id);
   if (session_iter == discovery_session_map_.end())
     return;
   delete session_iter->second;
   discovery_session_map_.erase(session_iter);
 }
 
 void ExtensionBluetoothEventRouter::OnStartDiscoverySession(
     const std::string& extension_id,
     const base::Closure& callback,
     scoped_ptr<device::BluetoothDiscoverySession> discovery_session) {
   // Clean up any existing session instance for the extension.
   DiscoverySessionMap::iterator iter =
       discovery_session_map_.find(extension_id);
   if (iter != discovery_session_map_.end())
     delete iter->second;
   discovery_session_map_[extension_id] = discovery_session.release();
   callback.Run();
 }
 
 void ExtensionBluetoothEventRouter::Observe(
     int type,
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
   switch (type) {
     case chrome::NOTIFICATION_EXTENSION_UNLOADED: {
       extensions::UnloadedExtensionInfo* info =
           content::Details<extensions::UnloadedExtensionInfo>(details).ptr();
       CleanUpForExtension(info->extension->id());
       break;
     }
+    case chrome::NOTIFICATION_EXTENSION_HOST_DESTROYED: {
+      ExtensionHost* host = content::Details<ExtensionHost>(details).ptr();
+      CleanUpForExtension(host->extension_id());
+      break;
+    }
   }
 }
 
 }  // namespace extensions