Chrome OS: Add bluetooth API for device discovery

chrome/browser/chromeos/bluetooth/bluetooth_adapter.cc

Index: chrome/browser/chromeos/bluetooth/bluetooth_adapter.cc
diff --git a/chrome/browser/chromeos/bluetooth/bluetooth_adapter.cc b/chrome/browser/chromeos/bluetooth/bluetooth_adapter.cc
new file mode 100644
index 0000000000000000000000000000000000000000..58c23760506dd02cbb5d50314d08a382f2daae64
--- /dev/null
+++ b/chrome/browser/chromeos/bluetooth/bluetooth_adapter.cc
@@ -0,0 +1,133 @@
+// 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_adapter.h"
+
+#include "base/memory/scoped_ptr.h"
+#include "base/observer_list.h"
+#include "base/values.h"
+#include "chrome/browser/chromeos/bluetooth/bluetooth_device.h"
+#include "chrome/browser/chromeos/dbus/bluetooth_adapter_client.h"
+#include "chrome/browser/chromeos/dbus/dbus_thread_manager.h"
+
+namespace chromeos {
+
+class BluetoothAdapterImpl : public BluetoothAdapter,
+                             public BluetoothAdapterClient::Observer {
+ public:
+  explicit BluetoothAdapterImpl(const std::string& id) : id_(id) {
+    DBusThreadManager* dbus_thread_manager = DBusThreadManager::Get();
+    DCHECK(dbus_thread_manager);
+    bluetooth_adapter_client_ = dbus_thread_manager->bluetooth_adapter_client();
+    DCHECK(bluetooth_adapter_client_);
+    bluetooth_adapter_client_->AddObserver(this, id_);
+  }
+
+  virtual ~BluetoothAdapterImpl() {
+    DCHECK(bluetooth_adapter_client_);
+    bluetooth_adapter_client_->RemoveObserver(this, id_);
+  }
+
+  virtual void AddObserver(BluetoothAdapter::Observer* observer) {
+    VLOG(1) << id_ << ": AddObserver";
+    DCHECK(observer);
+    observers_.AddObserver(observer);
+  }
+
+  virtual void RemoveObserver(BluetoothAdapter::Observer* observer) {
+    VLOG(1) << id_ << ": RemoveObserver";
+    DCHECK(observer);
+    observers_.RemoveObserver(observer);
+  }
+
+  virtual const std::string& Id() const {
+    return id_;
+  }
+
+  virtual void StartDiscovery() {
+    VLOG(1) << id_ << ": StartDiscovery";
+    DCHECK(bluetooth_adapter_client_);
+    bluetooth_adapter_client_->StartDiscovery(id_);
+  }
+
+  virtual void StopDiscovery() {
+    VLOG(1) << id_ << ": StopDiscovery";
+    DCHECK(bluetooth_adapter_client_);
+    bluetooth_adapter_client_->StopDiscovery(id_);
+  }
+
+  // BluetoothAdapterClient::Observer override.
+  virtual void DiscoveringPropertyChanged(const std::string& object_path,
+                                          bool discovering) {
+    VLOG(1) << id_ << ": object_path = " << object_path << ", Discovering = "
+            << discovering;
+    if (object_path != id_) {
+      return;
+    }
+    if (discovering) {
+      FOR_EACH_OBSERVER(BluetoothAdapter::Observer, observers_,
+                        DiscoveryStarted(object_path));
+    } else {
+      FOR_EACH_OBSERVER(BluetoothAdapter::Observer, observers_,
+                        DiscoveryEnded(object_path));
+    }
+  }
+
+  // BluetoothAdapterClient::Observer override.
+  virtual void DeviceFound(const std::string& object_path,
+                           const std::string& address,
+                           const base::DictionaryValue& device_properties) {
+    VLOG(1) << id_ << ": object_path = " << object_path << ", Device found: "
+            << address << " (with " << device_properties.size()
+            << " properties)";
+    if (object_path != id_) {
+      return;
+    }
+    // TODO(vlaviano): later, we will want to persist the device.
+    scoped_ptr<BluetoothDevice> device(
+        BluetoothDevice::Create(device_properties));
+    if (device.get() != NULL) {
+      FOR_EACH_OBSERVER(BluetoothAdapter::Observer, observers_,
+                        DeviceFound(object_path, device.get()));
+    } else {
+      LOG(WARNING) << "Could not create BluetoothDevice from properties.";
+    }
+  }
+
+  // BluetoothAdapterClient::Observer override.
+  virtual void DeviceDisappeared(const std::string& object_path,
+                                 const std::string& address) {
+    VLOG(1) << id_ << ": object_path = " << object_path
+            << ", Device disappeared: " << address;
+    if (object_path != id_) {
+      return;
+    }
+    // For now, we don't propagate this event to our observers.
+  }
+
+ private:
+  // Owned by the dbus thread manager.
+  BluetoothAdapterClient* bluetooth_adapter_client_;
+
+  ObserverList<BluetoothAdapter::Observer> observers_;
+
+  // An opaque identifier that we provide to clients.
+  // We use the dbus object path for the adapter as the id.
+  const std::string id_;
+
+  DISALLOW_COPY_AND_ASSIGN(BluetoothAdapterImpl);
+};
+
+BluetoothAdapter::BluetoothAdapter() {
+}
+
+BluetoothAdapter::~BluetoothAdapter() {
+}
+
+// static
+BluetoothAdapter* BluetoothAdapter::Create(const std::string& id) {
+  return new BluetoothAdapterImpl(id);
+}
+
+}  // namespace chromeos