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// 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/json/json_writer.h"
#include "base/logging.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_vector.h"
#include "base/utf_string_conversions.h"
#include "chrome/browser/extensions/api/bluetooth/bluetooth_api_utils.h"
#include "chrome/browser/extensions/event_names.h"
#include "chrome/browser/extensions/event_router.h"
#include "chrome/browser/extensions/extension_system.h"
#include "chrome/common/extensions/api/bluetooth.h"
#include "device/bluetooth/bluetooth_adapter.h"
#include "device/bluetooth/bluetooth_adapter_factory.h"
#include "device/bluetooth/bluetooth_device.h"
#include "device/bluetooth/bluetooth_socket.h"
namespace extensions {
ExtensionBluetoothEventRouter::ExtensionBluetoothEventRouter(Profile* profile)
: send_discovery_events_(false),
responsible_for_discovery_(false),
profile_(profile),
adapter_(NULL),
num_event_listeners_(0),
next_socket_id_(1),
ALLOW_THIS_IN_INITIALIZER_LIST(weak_ptr_factory_(this)) {
DCHECK(profile_);
}
ExtensionBluetoothEventRouter::~ExtensionBluetoothEventRouter() {
if (adapter_) {
adapter_->RemoveObserver(this);
adapter_ = NULL;
}
DLOG_IF(WARNING, socket_map_.size() != 0)
<< "Bluetooth sockets are still open.";
socket_map_.clear();
}
bool ExtensionBluetoothEventRouter::IsBluetoothSupported() const {
return adapter_ ||
device::BluetoothAdapterFactory::IsBluetoothAdapterAvailable();
}
void ExtensionBluetoothEventRouter::GetAdapter(
const device::BluetoothAdapterFactory::AdapterCallback& callback) {
if (adapter_) {
callback.Run(scoped_refptr<device::BluetoothAdapter>(adapter_));
return;
}
device::BluetoothAdapterFactory::GetAdapter(callback);
}
void ExtensionBluetoothEventRouter::OnListenerAdded() {
num_event_listeners_++;
InitializeAdapterIfNeeded();
}
void ExtensionBluetoothEventRouter::OnListenerRemoved() {
if (num_event_listeners_ > 0)
num_event_listeners_--;
MaybeReleaseAdapter();
}
int ExtensionBluetoothEventRouter::RegisterSocket(
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.get() == socket.get())
return i->first;
}
int return_id = next_socket_id_++;
socket_map_[return_id] = socket;
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;
}
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;
}
void ExtensionBluetoothEventRouter::SetResponsibleForDiscovery(
bool responsible) {
responsible_for_discovery_ = responsible;
}
bool ExtensionBluetoothEventRouter::IsResponsibleForDiscovery() const {
return responsible_for_discovery_;
}
void ExtensionBluetoothEventRouter::SetSendDiscoveryEvents(bool should_send) {
// At the transition into sending devices, also send past devices that
// were discovered as they will not be discovered again.
if (should_send && !send_discovery_events_) {
for (DeviceList::const_iterator i = discovered_devices_.begin();
i != discovered_devices_.end(); ++i) {
DispatchDeviceEvent(extensions::event_names::kBluetoothOnDeviceDiscovered,
**i);
}
}
send_discovery_events_ = should_send;
}
void ExtensionBluetoothEventRouter::DispatchDeviceEvent(
const char* event_name, const extensions::api::bluetooth::Device& device) {
scoped_ptr<ListValue> args(new ListValue());
args->Append(device.ToValue().release());
scoped_ptr<Event> event(new Event(event_name, args.Pass()));
ExtensionSystem::Get(profile_)->event_router()->BroadcastEvent(event.Pass());
}
void ExtensionBluetoothEventRouter::AdapterPresentChanged(
device::BluetoothAdapter* adapter, bool present) {
if (adapter != adapter_) {
DVLOG(1) << "Ignoring event for adapter " << adapter->GetAddress();
return;
}
DispatchAdapterStateEvent();
}
void ExtensionBluetoothEventRouter::AdapterPoweredChanged(
device::BluetoothAdapter* adapter, bool has_power) {
if (adapter != adapter_) {
DVLOG(1) << "Ignoring event for adapter " << adapter->GetAddress();
return;
}
DispatchAdapterStateEvent();
}
void ExtensionBluetoothEventRouter::AdapterDiscoveringChanged(
device::BluetoothAdapter* adapter, bool discovering) {
if (adapter != adapter_) {
DVLOG(1) << "Ignoring event for adapter " << adapter->GetAddress();
return;
}
if (!discovering) {
send_discovery_events_ = false;
responsible_for_discovery_ = false;
discovered_devices_.clear();
}
DispatchAdapterStateEvent();
}
void ExtensionBluetoothEventRouter::DeviceAdded(
device::BluetoothAdapter* adapter,
device::BluetoothDevice* device) {
if (adapter != adapter_) {
DVLOG(1) << "Ignoring event for adapter " << adapter->GetAddress();
return;
}
extensions::api::bluetooth::Device* extension_device =
new extensions::api::bluetooth::Device();
extensions::api::bluetooth::BluetoothDeviceToApiDevice(
*device, extension_device);
discovered_devices_.push_back(extension_device);
if (!send_discovery_events_)
return;
DispatchDeviceEvent(extensions::event_names::kBluetoothOnDeviceDiscovered,
*extension_device);
}
void ExtensionBluetoothEventRouter::InitializeAdapterIfNeeded() {
if (!adapter_) {
GetAdapter(base::Bind(&ExtensionBluetoothEventRouter::InitializeAdapter,
weak_ptr_factory_.GetWeakPtr()));
}
}
void ExtensionBluetoothEventRouter::InitializeAdapter(
scoped_refptr<device::BluetoothAdapter> adapter) {
if (!adapter_) {
adapter_ = adapter;
adapter_->AddObserver(this);
}
}
void ExtensionBluetoothEventRouter::MaybeReleaseAdapter() {
if (adapter_ && num_event_listeners_ == 0) {
adapter_->RemoveObserver(this);
adapter_ = NULL;
}
}
void ExtensionBluetoothEventRouter::DispatchAdapterStateEvent() {
api::bluetooth::AdapterState state;
PopulateAdapterState(*adapter_, &state);
scoped_ptr<ListValue> args(new ListValue());
args->Append(state.ToValue().release());
scoped_ptr<Event> event(new Event(
extensions::event_names::kBluetoothOnAdapterStateChanged,
args.Pass()));
ExtensionSystem::Get(profile_)->event_router()->BroadcastEvent(event.Pass());
}
} // namespace extensions
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