Hello, this is Storage.h file. Who can write Storage.cpp for that header file ?

#ifndef AGENDA_STORAGE_H

#define AGENDA_STORAGE_H

#include

#include

#include

#include

#include "Meeting.hpp"

#include "User.hpp"

class Storage {

private:

/**

* default constructor

*/

Storage();

/**

* disallow the copy constructor and assign operator

*/

Storage(const Storage &t_another) = delete;

void operator=(const Storage &t_another) = delete;

/**

* read file content into memory

* @return if success, true will be returned

*/

bool readFromFile(void);

/**

* write file content from memory

* @return if success, true will be returned

*/

bool writeToFile(void);

public:

/**

* get Instance of storage

* @return the pointer of the instance

*/

static std::shared_ptr getInstance(void);

/**

* destructor

*/

~Storage();

// CRUD for User & Meeting

// using C++11 Function Template and Lambda Expressions

/**

* create a user

* @param a user object

*/

void createUser(const User &t_user);

/**

* query users

* @param a lambda function as the filter

* @return a list of fitted users

*/

std::list queryUser(std::function filter) const;

/**

* update users

* @param a lambda function as the filter

* @param a lambda function as the method to update the user

* @return the number of updated users

*/

int updateUser(std::function filter,

std::function switcher);

/**

* delete users

* @param a lambda function as the filter

* @return the number of deleted users

*/

int deleteUser(std::function filter);

/**

* create a meeting

* @param a meeting object

*/

void createMeeting(const Meeting &t_meeting);

/**

* query meetings

* @param a lambda function as the filter

* @return a list of fitted meetings

*/

std::list queryMeeting(

std::function filter) const;

/**

* update meetings

* @param a lambda function as the filter

* @param a lambda function as the method to update the meeting

* @return the number of updated meetings

*/

int updateMeeting(std::function filter,

std::function switcher);

/**

* delete meetings

* @param a lambda function as the filter

* @return the number of deleted meetings

*/

int deleteMeeting(std::function filter);

/**

* sync with the file

*/

bool sync(void);

private:

static std::shared_ptr m_instance;

std::list m_userList;

std::list m_meetingList;

bool m_dirty;

};

#endif