public void SignUp(string username, string password)
{
if (ChackUsername(username))
{
UsersBase client = new UsersBase();
if (head == null)
{
head = client;
tail = client;
}
else
{
tail.NextUser = client;
tail = client;
}
SetUsrname_Password(client, username, password);
CountUsers++;
Console.WriteLine("Account successfully created: Username: "******"An account with that username already exists: Username: " + username);
}
}
public UsersBase LogIn(string username, string password)
{
UsersBase current = head;
while (current != null)
{
if (username == current.Username && current.ChackPassword(password))
{
return(current);
}
current = current.NextUser;
}
return(null);
}
private bool ChackUsername(string username)
{
UsersBase current = head;
while (current != null)
{
if (username == current.Username)
{
return(false);
}
current = current.NextUser;
}
return(true);
}
public void InfoAUser(int id) // overloading
{
UsersBase currnet = head;
while (currnet != null)
{
if (currnet.ID == id)
{
InfoAUser(currnet, id);
return;
}
currnet = currnet.NextUser;
}
Console.WriteLine("Wrong ID");
}
public void Info()
{
UsersBase users = head;
Console.WriteLine($"Users' count: {CountUsers}\n");
for (int i = 0; i < CountUsers; i++)
{
Console.WriteLine($"User ID: {users.ID}");
Console.WriteLine($"Username: {users.Username}");
Console.WriteLine("Password: ******");
Console.WriteLine(new string('-', 15));
users = users.NextUser;
}
}
public void InfoAUser(string username) // overloading
{
UsersBase currnet = head;
while (currnet != null)
{
if (currnet.Username == username)
{
InfoAUser(currnet, username);
return;
}
currnet = currnet.NextUser;
}
Console.WriteLine("Wrong username");
}
public void Info()
{
UsersBase users = head;
Console.WriteLine("\nUsers all info!");
Console.WriteLine($"\nUsers' count: {CountUsers}\n");
while (users != null)
{
Console.WriteLine($"User ID: {users.ID}");
Console.WriteLine($"Username: {users.Username}");
Console.WriteLine($"Password: {users.password}");
Console.WriteLine(new string('-', 15));
users = users.NextUser;
}
}
public override bool Remove()
{
UsersBase pre = null;
UsersBase cur = head;
Console.Write("Username: "******"Password: ");
string password = Console.ReadLine();
while (cur != null)
{
if (username == cur.Username && cur.ChackPassword(password))
{
if (pre != null)
{
pre.NextUser = cur.NextUser;
if (cur.NextUser == null)
{
tail = pre;
}
}
else
{
head = head.NextUser;
if (head.NextUser == null)
{
tail = null;
}
}
CountUsers--;
return(true);
}
pre = cur;
cur = cur.NextUser;
}
return(false);
}
static void Main(string[] args)
{
User user = new User();
user.SignUp("Tigran", "123456");
user.SignUp("Tigran", "123gh56");
user.SignUp("Vahram", "787979");
user.SignUp("Erik", "224716");
user.SignUp("Robert", "174865");
user.SignUp("Karlen", "175462");
Console.Write("\nLog in\nUsername: "******"Password: "******"Successfully log in");
Console.WriteLine("Your ID: " + userLogin.ID);
}
else
{
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("Wrong username or password");
}
Console.ForegroundColor = ConsoleColor.White;
Console.WriteLine(new string('-', 15));
UsersBase usersBase = user; // UpCast
usersBase.Info();
Console.WriteLine("Please input username and password for remove ");
if (user.Remove()) // override method
{
Console.ForegroundColor = ConsoleColor.Green;
Console.WriteLine("Successfully removed.");
}
else
{
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("Wrong username or password!!!");
}
Console.ForegroundColor = ConsoleColor.White;
Console.WriteLine("\n" + new string('-', 15));
user = usersBase as User; // DownCast
user.Info();
user.InfoAUser("Vahram");
Console.WriteLine(new string('-', 15));
user.InfoAUser(123546);
Console.ReadKey();
}
protected void InfoAUser(UsersBase position, int id)
{
Console.WriteLine("{0}, info with this ID", id);
Console.WriteLine($"{id} Username: {position.Username}");
Console.WriteLine($"{id} Password: {position.password}");
}
protected void InfoAUser(UsersBase position, string username)
{
Console.WriteLine("{0}'s info", username);
Console.WriteLine($"{username} ID: {position.ID}");
Console.WriteLine($"{username} Password: {position.password}");
}
public void SetUsrname_Password(UsersBase client, string username, string password)
{
client.Username = username;
client.password = password;
}
