Task 57: Merge Squads

Task 57: Merge Squads

namespace MergeSquads
{
    public static class Program
    {
        public static void Main()
        {
            Army army = new Army();
            Database database = new Database();
            
            army.Work(database);
        }
    }

    public class Database
    {
        private List<Soldier> _alphaSquad = new();
        private List<Soldier> _betaSquad = new();
        
        public Database()
        {
            CreateAlphaSquad();
            CreateBetaSquad();
        }
        
        public List<Soldier> GetAlphaSquad() => new(_alphaSquad);
        
        public List<Soldier> GetBetaSquad() => new(_betaSquad);

        public void SetAlphaSquad(IEnumerable<Soldier> alphaSquad) => _alphaSquad = alphaSquad.ToList();
        
        public void SetBetaSquad(IEnumerable<Soldier> betaSquad) => _betaSquad = betaSquad.ToList();

        private void CreateAlphaSquad()
        {
            _alphaSquad.Add(new Soldier("John", "Smith"));
            _alphaSquad.Add(new Soldier("William", "Bones"));
            _alphaSquad.Add(new Soldier("David", "Brown"));
            _alphaSquad.Add(new Soldier("Jessica", "Taylor"));
            _alphaSquad.Add(new Soldier("Joseph", "Miller"));
            _alphaSquad.Add(new Soldier("Michael", "Davis"));
        }

        private void CreateBetaSquad()
        {
            _betaSquad.Add(new Soldier("Megan", "Fox"));
            _betaSquad.Add(new Soldier("Angela", "Wilson"));
            _betaSquad.Add(new Soldier("Richard", "Moore"));
            _betaSquad.Add(new Soldier("Thomas", "Johnson"));
            _betaSquad.Add(new Soldier("Joseph", "Miller"));
            _betaSquad.Add(new Soldier("Donald", "Johnson"));
        }
    }
    
    public class Soldier
    {
        public Soldier(string firstName, string lastName)
        {
            FirstName = firstName;
            LastName = lastName;
        }
        
        public string FirstName { get; }
        public string LastName { get; }
    }
    
    public class Army
    {
        private bool _isWork = true;
        private Database _database;
        
        public void Work(Database database)
        {
            _database = database;

            while (_isWork)
            {
                Console.Clear();
                
                ShowSoldiers();

                Console.ReadKey();
            }
        }
        
        private void ShowSoldiers()
        {
            char filteredChar = 'B';
            IEnumerable<Soldier> soldiers;
            IEnumerable<Soldier> betaSquad;
            IEnumerable<Soldier> alphaSquad;
            
            soldiers = _database.GetAlphaSquad().Where(soldier => soldier.LastName.StartsWith(filteredChar));
            betaSquad = _database.GetBetaSquad().Union(soldiers);
            _database.SetBetaSquad(betaSquad);
            
            alphaSquad = _database.GetAlphaSquad().Where(soldier => soldier.LastName.StartsWith(filteredChar) == false);
            _database.SetAlphaSquad(alphaSquad);
            
            Console.WriteLine("\nBeta Squad:");
            
            foreach (Soldier soldier in _database.GetBetaSquad())
            {
                Console.WriteLine($"Name: {soldier.FirstName}, " +
                                  $"Rank: {soldier.LastName}");
            }
        }
    }
}