Rewrite dbus code using sdbus-c++

internal/platform/implementation/linux/bluetooth_devices.cc

@@ -0,0 +1,49 @@
+#include <functional>
+#include <optional>
+
+#include <sdbus-c++/Types.h>
+
+#include "internal/platform/implementation/linux/bluetooth_classic_device.h"
+#include "internal/platform/implementation/linux/bluetooth_devices.h"
+#include "internal/platform/implementation/linux/bluez.h"
+#include "absl/synchronization/mutex.h"
+
+namespace nearby {
+namespace linux {
+std::optional<std::reference_wrapper<BluetoothDevice>>
+BluetoothDevices::get_device_by_path(
+    const sdbus::ObjectPath &device_object_path) {
+  absl::ReaderMutexLock l(&devices_by_path_lock_);
+
+  if (devices_by_path_.count(device_object_path) == 0) {
+    return std::nullopt;
+  }
+
+  auto &device = devices_by_path_[device_object_path];
+  return device;
+}
+
+std::optional<std::reference_wrapper<BluetoothDevice>>
+BluetoothDevices::get_device_by_address(const std::string &addr) {
+  auto device_object_path =
+      bluez::device_object_path(adapter_object_path_, addr);
+  return get_device_by_path(device_object_path);
+}
+
+void BluetoothDevices::remove_device_by_path(
+    const sdbus::ObjectPath &device_object_path) {
+  absl::MutexLock l(&devices_by_path_lock_);
+
+  devices_by_path_.erase(device_object_path);
+}
+
+BluetoothDevice &
+BluetoothDevices::add_new_device(sdbus::ObjectPath device_object_path) {
+  absl::MutexLock l(&devices_by_path_lock_);
+  auto pair =
+      devices_by_path_.emplace(device_object_path, system_bus_,
+                               std::move(device_object_path), observers_);
+  return pair.first->second;
+}
+} // namespace linux
+} // namespace nearby