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/******************************************************************************
*
* Copyright 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
#pragma once
#include <map>
#include <mutex>
#include "hci/classic_device.h"
#include "hci/device.h"
#include "hci/dual_device.h"
#include "hci/le_device.h"
#include "os/log.h"
namespace bluetooth::hci {
/**
* Stores all of the paired or connected devices in the database.
*
* <p>If a device is stored here it is actively being used by the stack.
*
* <p>This database is not meant for scan results.
*/
class DeviceDatabase {
public:
DeviceDatabase()
: classic_device_map_(*new std::map<std::string, std::shared_ptr<ClassicDevice>>),
le_device_map_(*new std::map<std::string, std::shared_ptr<LeDevice>>),
dual_device_map_(*new std::map<std::string, std::shared_ptr<DualDevice>>) {
if (!ReadFromDisk()) {
LOG_WARN("First boot or missing data!");
}
}
/**
* Adds a device to the internal memory map and triggers a WriteToDisk.
*
* @param address private address for device
* @return weak pointer to the device or empty pointer if device already exists
*/
std::shared_ptr<ClassicDevice> CreateClassicDevice(Address address);
/**
* Adds a device to the internal memory map and triggers a WriteToDisk.
*
* @param address private address for device
* @return weak pointer to the device or empty pointer if device already exists
*/
std::shared_ptr<LeDevice> CreateLeDevice(Address address);
/**
* Adds a device to the internal memory map and triggers a WriteToDisk.
*
* @param address private address for device
* @return weak pointer to the device or empty pointer if device already exists
*/
std::shared_ptr<DualDevice> CreateDualDevice(Address address);
/**
* Fetches a Classic Device matching the given uuid.
*
* @param uuid generated uuid from a Device
* @return a weak reference to the matching Device or empty shared_ptr (nullptr)
*/
std::shared_ptr<ClassicDevice> GetClassicDevice(const std::string& uuid);
/**
* Fetches a Le Device matching the given uuid.
*
* @param uuid generated uuid from a Device
* @return a weak reference to the matching Device or empty shared_ptr (nullptr)
*/
std::shared_ptr<LeDevice> GetLeDevice(const std::string& uuid);
/**
* Fetches a Dual Device matching the given uuid.
*
* @param uuid generated uuid from a Device
* @return a weak reference to the matching Device or empty shared_ptr (nullptr)
*/
std::shared_ptr<DualDevice> GetDualDevice(const std::string& uuid);
/**
* Removes a device from the internal database.
*
* @param device weak pointer to device to remove from the database
* @return <code>true</code> if the device is removed
*/
bool RemoveDevice(const std::shared_ptr<Device>& device);
/**
* Changes an address for a device.
*
* Also fixes the key mapping for the device.
*
* @param new_address this will replace the existing address
* @return <code>true</code> if updated
*/
bool UpdateDeviceAddress(const std::shared_ptr<Device>& device, Address new_address);
// TODO(optedoblivion): Make interfaces for device modification
// We want to keep the device modification encapsulated to the DeviceDatabase.
// Pass around shared_ptr to device, device metadata only accessible via Getters.
// Choices:
// a) Have Getters/Setters on device object
// b) Have Getters/Setters on device database accepting a device object
// c) Have Getters on device object and Setters on device database accepting a device object
// I chose to go with option c for now as I think it is the best option.
/**
* Fetches a list of classic devices.
*
* @return vector of weak pointers to classic devices
*/
std::vector<std::shared_ptr<Device>> GetClassicDevices();
/**
* Fetches a list of le devices
*
* @return vector of weak pointers to le devices
*/
std::vector<std::shared_ptr<Device>> GetLeDevices();
private:
std::mutex device_map_mutex_;
std::map<std::string, std::shared_ptr<ClassicDevice>> classic_device_map_;
std::map<std::string, std::shared_ptr<LeDevice>> le_device_map_;
std::map<std::string, std::shared_ptr<DualDevice>> dual_device_map_;
bool AddDeviceToMap(ClassicDevice&& device);
bool AddDeviceToMap(LeDevice&& device);
bool AddDeviceToMap(DualDevice&& device);
bool WriteToDisk();
bool ReadFromDisk();
};
} // namespace bluetooth::hci
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