static void Main(string[] args)
{
var pd = new PortfolioDisplay();
var myPortfolio = new Portfolio(pd);
var hisPortfolio = new Portfolio(pd);
var googleStock = new Stock("Google", 200M);
var vestasStock = new Stock("Vestas", 45M);
myPortfolio.AddStock(googleStock, 50);
myPortfolio.AddStock(vestasStock, 95);
hisPortfolio.AddStock(googleStock, 20);
googleStock.Value = 55M;
vestasStock.Value = 20M;
Console.WriteLine($"{nameof(myPortfolio)} has {myPortfolio.Total} value");
Console.WriteLine($"{nameof(hisPortfolio)} has {hisPortfolio.Total} value");
while (true)
{
StockMarket.RefreshStocks();
Thread.Sleep(10000);
}
}
/// <summary>
/// The value changed, and the method implemented from interface, this takes a <see cref="Subject"/> Abstraction
/// and prints the changed value. This method is crucial for the Observer pattern.
/// </summary>
/// <para>
/// Implemented as using push methodology, but doesn't directly use the internal state and only using it retrieve a
/// notification for a new update and passing itself to the output, therefore using the pull methodology instead.
/// </para>
/// <param name="value">This parameter is the internal state of the Subject received. This ensures that the Observer knows the state</param>
public void ValueChanged(Subject value)
{
// Checks global variable if notifications are allowed.
if (StockMarket.PortfolioNotifications)
{
PortfolioDisplay.PrintInformation(this);
}
}
/// <summary>
/// Dummy code to test application
/// </summary>
public static void Main()
{
var pd = new PortfolioDisplay();
var portfolios = new List <IPortfolio>();
var myPortfolio = new Portfolio("MyPortfolio", pd);
var hisPortfolio = new Portfolio("HisPortfolio", pd);
portfolios.Add(myPortfolio);
portfolios.Add(hisPortfolio);
var googleStock = new Stock("Google", 200.25M);
var vestasStock = new Stock("Vestas", 150.75M);
new Thread(UpdateStock);
myPortfolio.AddStock(googleStock, 51);
myPortfolio.AddStock(vestasStock, 95);
hisPortfolio.AddStock(googleStock, 22);
while (true)
{
StockMarket.RefreshStocks();
Console.WriteLine("Select a portfolio");
foreach (var portfolio in portfolios)
{
Console.WriteLine($"{portfolio.Name}");
}
Console.WriteLine("Type the name of the portfolio to select it");
var input = Console.ReadLine();
var index = -1;
foreach (var portfolio in portfolios)
{
if (input == portfolio.Name)
{
index = portfolios.IndexOf(portfolio);
}
}
if (index == -1)
{
continue;
}
Console.WriteLine();
bool cont = true;
while (cont)
{
Console.WriteLine("Type 'B' to Buy, 'S' To Sell or C to Cancel");
char transactionInput = (char)Console.Read();
switch (transactionInput)
{
case 'B':
StockMarket.BuyStock(portfolios[index]);
break;
case 'S':
StockMarket.SellStock(portfolios[index]);
break;
case 'C':
cont = false;
break;
default:
Console.WriteLine();
break;
}
}
}
}
public Portfolio(PortfolioDisplay portfolioDisplay)
{
PortfolioDisplay = portfolioDisplay ?? throw new ArgumentNullException(nameof(portfolioDisplay));
}
public void ValueChanged(ISubject value)
{
PortfolioDisplay.PrintInformation(this);
}
