[sensors_plus] Refactor the C++ code (#358)

Signed-off-by: Boram Bae <[email protected]>

Author: bbrto21

packages/sensors_plus/tizen/src/device_sensor.cc

@@ -0,0 +1,112 @@
+// Copyright 2022 Samsung Electronics Co., Ltd. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "device_sensor.h"
+
+#include "log.h"
+
+namespace {
+
+sensor_type_e ToTizenSensorType(const SensorType &sensor_type) {
+  switch (sensor_type) {
+    case SensorType::kAccelerometer:
+      return SENSOR_ACCELEROMETER;
+    case SensorType::kGyroscope:
+      return SENSOR_GYROSCOPE;
+    case SensorType::kUserAccel:
+    default:
+      return SENSOR_LINEAR_ACCELERATION;
+  }
+}
+
+}  // namespace
+
+DeviceSensor::DeviceSensor(SensorType sensor_type)
+    : sensor_type_(sensor_type) {}
+
+DeviceSensor::~DeviceSensor() {
+  if (is_listening_) {
+    StopListen();
+  }
+
+  if (listener_) {
+    sensor_destroy_listener(listener_);
+    listener_ = nullptr;
+  }
+}
+
+bool DeviceSensor::StartListen(SensorEventCallback callback) {
+  if (is_listening_) {
+    LOG_WARN("Already listening.");
+    last_error_ = SENSOR_ERROR_OPERATION_FAILED;
+    return false;
+  }
+
+  sensor_h sensor;
+  int ret = sensor_get_default_sensor(ToTizenSensorType(sensor_type_), &sensor);
+  if (ret != SENSOR_ERROR_NONE) {
+    LOG_ERROR("Failed to get default sensor: %s", get_error_message(ret));
+    last_error_ = ret;
+    return false;
+  }
+
+  ret = sensor_create_listener(sensor, &listener_);
+  if (ret != SENSOR_ERROR_NONE) {
+    LOG_ERROR("Failed to create listener: %s", get_error_message(ret));
+    last_error_ = ret;
+    return false;
+  }
+
+  ret = sensor_listener_set_event_cb(
+      listener_, 60,
+      [](sensor_h sensor, sensor_event_s *event, void *user_data) {
+        auto *self = static_cast<DeviceSensor *>(user_data);
+        SensorEvent sensor_event;
+        for (int i = 0; i < event->value_count; i++) {
+          sensor_event.push_back(event->values[i]);
+        }
+        self->callback_(sensor_event);
+      },
+      this);
+  if (ret != SENSOR_ERROR_NONE) {
+    LOG_ERROR("Failed to set event callback: %s", get_error_message(ret));
+    last_error_ = ret;
+    return false;
+  }
+
+  ret = sensor_listener_start(listener_);
+  if (ret != SENSOR_ERROR_NONE) {
+    LOG_ERROR("Failed to start listener: %s", get_error_message(ret));
+    last_error_ = ret;
+    return false;
+  }
+
+  callback_ = callback;
+  is_listening_ = true;
+
+  return true;
+}
+
+void DeviceSensor::StopListen() {
+  if (!is_listening_) {
+    LOG_WARN("Already canceled.");
+    return;
+  }
+
+  int ret = sensor_listener_stop(listener_);
+  if (ret != SENSOR_ERROR_NONE) {
+    LOG_ERROR("Failed to stop listener: %s", get_error_message(ret));
+    last_error_ = ret;
+    return;
+  }
+
+  is_listening_ = false;
+
+  ret = sensor_listener_unset_event_cb(listener_);
+  if (ret != SENSOR_ERROR_NONE) {
+    LOG_ERROR("Failed to unset event callback: %s", get_error_message(ret));
+    last_error_ = ret;
+    return;
+  }
+}

packages/sensors_plus/tizen/src/device_sensor.h

@@ -0,0 +1,42 @@
+// Copyright 2022 Samsung Electronics Co., Ltd. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef FLUTTER_PLUGIN_DEVICE_SENSOR_H_
+#define FLUTTER_PLUGIN_DEVICE_SENSOR_H_
+
+#include <sensor.h>
+#include <tizen.h>
+
+#include <functional>
+#include <string>
+#include <vector>
+
+enum class SensorType { kAccelerometer, kGyroscope, kUserAccel };
+
+typedef std::vector<double> SensorEvent;
+typedef std::function<void(SensorEvent)> SensorEventCallback;
+
+class DeviceSensor {
+ public:
+  DeviceSensor(SensorType sensor_type);
+  ~DeviceSensor();
+
+  int GetLastError() { return last_error_; }
+
+  std::string GetLastErrorString() { return get_error_message(last_error_); }
+
+  bool StartListen(SensorEventCallback callback);
+
+  void StopListen();
+
+ private:
+  SensorType sensor_type_;
+  sensor_listener_h listener_ = nullptr;
+  bool is_listening_ = false;
+  int last_error_ = TIZEN_ERROR_NONE;
+
+  SensorEventCallback callback_ = nullptr;
+};
+
+#endif  // FLUTTER_PLUGIN_DEVICE_SENSOR_H_