using System;
using System.Collections.Generic;
using System.Text;

namespace Project1
{
    /// <summary>
    /// This interface defines the basic functions of
    /// manipulating data in User Database.
    /// </summary>
    public interface UserDatabase
    {
        /// <summary>
        /// Add a user record to the database
        /// </summary>
        /// <param name="user">An object of User</param>
        void add(Customer user);

        /// <summary>
        /// Remove a user record from the database
        /// </summary>
        /// <param name="user">An object of User</param>
        void remove(Customer user);

        /// <summary>
        /// Update a user record in the database
        /// </summary>
        /// <param name="user">An object of User</param>
        void update(Customer user);

        /// <summary>
        /// Search for a user record in the database
        /// </summary>
        /// <param name="uid">The user id of a user</param>
        Customer search(String uid);

        List<Customer> getAll();
    }
}