Chrome OS: Add bluetooth API for device discovery

chrome/browser/chromeos/bluetooth/bluetooth_manager.cc

+// Copyright (c) 2011 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/chromeos/bluetooth/bluetooth_manager.h"
+
+#include "base/bind.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/observer_list.h"
+#include "chrome/browser/chromeos/bluetooth/bluetooth_adapter.h"
+#include "chrome/browser/chromeos/dbus/bluetooth_manager_client.h"
+#include "chrome/browser/chromeos/dbus/dbus_thread_manager.h"
+
+namespace chromeos {
+
+static BluetoothManager* g_bluetooth_manager = NULL;
+
+class BluetoothManagerImpl : public BluetoothManager,
+                             public BluetoothManagerClient::Observer {
+ public:
+  BluetoothManagerImpl() : weak_ptr_factory_(this) {
+    DBusThreadManager* dbus_thread_manager = DBusThreadManager::Get();
+    DCHECK(dbus_thread_manager);
+    bluetooth_manager_client_ = dbus_thread_manager->bluetooth_manager_client();
+    DCHECK(bluetooth_manager_client_);
+
+    bluetooth_manager_client_->AddObserver(this);
+
+    bluetooth_manager_client_->DefaultAdapter(
+        base::Bind(&BluetoothManagerImpl::OnDefaultAdapter,
+                   weak_ptr_factory_.GetWeakPtr()));
+  }
+
+  virtual void AddObserver(BluetoothManager::Observer* observer) {
+    VLOG(1) << "BluetoothManager::AddObserver";
+    DCHECK(observer);
+    observers_.AddObserver(observer);
+  }
+
+  virtual void RemoveObserver(BluetoothManager::Observer* observer) {
+    VLOG(1) << "BluetoothManager::RemoveObserver";
+    DCHECK(observer);
+    observers_.RemoveObserver(observer);
+  }
+
+  virtual BluetoothAdapter* DefaultAdapter() {
+    VLOG(1) << "BluetoothManager::DefaultAdapter";
+    return default_adapter_.get();
+  }
+
+  // BluetoothManagerClient::Observer override.
+  virtual void AdapterRemoved(const std::string& adapter) {
+    VLOG(1) << "AdapterRemoved: " << adapter;
+    if (default_adapter_.get() == NULL || default_adapter_->Id() != adapter) {
+      return;
+    }
+    // The default adapter was removed.
+    default_adapter_.reset();
+    FOR_EACH_OBSERVER(BluetoothManager::Observer, observers_,
+                      DefaultAdapterChanged(default_adapter_.get()));
+  }
+
+  // BluetoothManagerClient::Observer override.
+  virtual void DefaultAdapterChanged(const std::string& adapter) {
+    VLOG(1) << "DefaultAdapterChanged: " << adapter;
+    OnNewDefaultAdapter(adapter);
+  }
+
+ private:
+  virtual ~BluetoothManagerImpl() {
+    bluetooth_manager_client_->RemoveObserver(this);
+  }
+
+  // We have updated info about the default adapter.
+  void OnNewDefaultAdapter(const std::string& adapter) {
+    VLOG(1) << "OnNewDefaultAdapter: " << adapter;
+    if (default_adapter_.get() != NULL && default_adapter_->Id() == adapter) {
+      return;
+    }
+    default_adapter_.reset(BluetoothAdapter::Create(adapter));
+    DCHECK(default_adapter_.get());
+    FOR_EACH_OBSERVER(BluetoothManager::Observer, observers_,
+                      DefaultAdapterChanged(default_adapter_.get()));
+  }
+
+  // Called by bluetooth_manager_client when our DefaultAdapter request is
+  // complete
+  void OnDefaultAdapter(const std::string& adapter, bool success) {
+    if (!success) {
+      LOG(ERROR) << "OnDefaultAdapter: failed.";
+      return;
+    }
+    VLOG(1) << "OnDefaultAdapter: " << adapter;
+    OnNewDefaultAdapter(adapter);
+  }
+
+  base::WeakPtrFactory<BluetoothManagerImpl> weak_ptr_factory_;
+
+  // Owned by the dbus thread manager. Storing this is ok only because our
+  // lifetime is a subset of the thread manager's lifetime.
+  BluetoothManagerClient* bluetooth_manager_client_;
+
+  ObserverList<BluetoothManager::Observer> observers_;
+
+  scoped_ptr<BluetoothAdapter> default_adapter_;
+
+  DISALLOW_COPY_AND_ASSIGN(BluetoothManagerImpl);
+};
+
+BluetoothManager::BluetoothManager() {
+}
+
+BluetoothManager::~BluetoothManager() {
+}
+
+// static
+// TODO(vlaviano): allow creation of stub impl for ui testing
+void BluetoothManager::Initialize() {
+  VLOG(1) << "BluetoothManager::Initialize";
+  DCHECK(!g_bluetooth_manager);
+  g_bluetooth_manager = new BluetoothManagerImpl();
+  DCHECK(g_bluetooth_manager);
+}
+
+// static
+void BluetoothManager::Shutdown() {
+  VLOG(1) << "BluetoothManager::Shutdown";
+  if (g_bluetooth_manager) {
+    delete g_bluetooth_manager;
+    g_bluetooth_manager = NULL;
+  }
+}
+
+// static
+BluetoothManager* BluetoothManager::GetInstance() {
+  return g_bluetooth_manager;
+}
+
+}  // namespace chromeos