public PortfolioQueryResult Handle(PortfolioQuery query)
{
var portfolio = _repo.Load();
var portfolioReturns = PortfolioManager.CalculateReturns(portfolio);
return(Result());
PortfolioQueryResult Result()
{
return(new PortfolioQueryResult {
PortfolioValue = portfolio.Entries.Sum(e => e.Qty * e.CurrentPrice),
PortfolioRateOfReturn = portfolioReturns.TotalRateOfReturn,
Stocks = portfolio.Entries.Select(Map).ToArray()
});
PortfolioQueryResult.StockInfo Map(Portfolio.Stock e)
=> new PortfolioQueryResult.StockInfo
{
Name = e.Name,
Symbol = e.Symbol,
Currency = e.Currency,
Qty = e.Qty,
BuyingPrice = e.BuyingPrice,
CurrentPrice = e.CurrentPrice,
BuyingValue = e.Qty * e.BuyingPrice,
CurrentValue = e.Qty * e.CurrentPrice,
Return = portfolioReturns.Returns[e.Symbol].Return,
RateOfReturn = portfolioReturns.Returns[e.Symbol].RateOfReturn
};
}
}
public void CalculateReturns()
{
var portfolio = new Portfolio();
portfolio.Entries.Add(new Portfolio.Stock
{
Symbol = "S1",
Qty = 5,
BuyingPrice = 2.0m,
CurrentPrice = 4.0m
});
portfolio.Entries.Add(new Portfolio.Stock
{
Symbol = "S2",
Qty = 10,
BuyingPrice = 11.0m,
CurrentPrice = 16.0m
});
var result = PortfolioManager.CalculateReturns(portfolio);
Assert.Equal(10.0m, result.Returns["S1"].Return);
Assert.Equal(1.0m, result.Returns["S1"].RateOfReturn);
Assert.Equal(50.0m, result.Returns["S2"].Return);
Assert.Equal(0.45m, result.Returns["S2"].RateOfReturn, 2);
Assert.Equal(60.0m, result.TotalReturn);
Assert.Equal(0.5m, result.TotalRateOfReturn);
}
public Output Process(IMessage _, IMessageContext model)
{
var queryModel = model as PortfolioQueryContextModel;
var prices = new Portfolio
{
Entries = queryModel.Entries
.Select(e => new Portfolio.Stock
{
Qty = e.Qty,
Bought = e.Bought,
BuyingPrice = e.BuyingPrice,
Currency = e.Currency,
CurrentPrice = e.CurrentPrice,
LastUpdated = e.LastUpdated,
Name = e.Name,
Symbol = e.Symbol
})
.ToList()
};
var returns = PortfolioManager.CalculateReturns(prices);
return(new QueryOutput(Result()));
PortfolioQueryResult Result()
{
return(new PortfolioQueryResult {
PortfolioValue = queryModel.Entries.Sum(e => e.Qty * e.CurrentPrice),
PortfolioRateOfReturn = returns.TotalRateOfReturn,
Stocks = queryModel.Entries.Select(Map).ToArray()
});
PortfolioQueryResult.StockInfo Map(PortfolioQueryContextModel.StockInfo e)
=> new PortfolioQueryResult.StockInfo
{
Name = e.Name,
Symbol = e.Symbol,
Currency = e.Currency,
Qty = e.Qty,
BuyingPrice = e.BuyingPrice,
CurrentPrice = e.CurrentPrice,
BuyingValue = e.Qty * e.BuyingPrice,
CurrentValue = e.Qty * e.CurrentPrice,
Return = returns.Returns[e.Symbol].Return,
RateOfReturn = returns.Returns[e.Symbol].RateOfReturn
};
}
}