private IEnumerable <CurrencyResponseModel> CreateModel(
DateTime startDate, DateTime endDate, IReadOnlyCollection <Currency> currencies)
{
var result = new List <CurrencyResponseModel>();
while (startDate < endDate)
{
var date = new DateTime(startDate.Year, startDate.Month, 1);
var currenciesByDate = currencies.Where(e =>
date <= e.Date &&
e.Date <= date.AddDays(DateTime.DaysInMonth(date.Year, date.Month))
).ToArray();
var itemModel = new CurrencyResponseModel
{
Year = startDate.Year,
Month = startDate.Month,
WeekPeriods = CreateWeekPeriods(startDate.Year, startDate.Month)
};
foreach (var currencyWeekPeriodModel in itemModel.WeekPeriods)
{
var startWeekDate = new DateTime(
startDate.Year, startDate.Month, currencyWeekPeriodModel.StartDay);
var endWeekDate = new DateTime(
startDate.Year, startDate.Month, currencyWeekPeriodModel.EndDay);
var currenciesInPeriod = currenciesByDate
.Where(e => startWeekDate <= e.Date && e.Date <= endWeekDate)
.GroupBy(e => e.Code)
.ToDictionary(e => e.Key, v => v.ToArray());
foreach (var code in _parameters.CurrenciesCodes)
{
var currenciesByCode = currenciesInPeriod.ContainsKey(code)
? currenciesInPeriod[code]
: new Currency[0];
var collection = new CurrencyCollection();
collection.AddRange(currenciesByCode);
var model = new CurrencyResponseValueModel
{
Max = collection.Max(),
Min = collection.Min(),
Median = collection.Median(),
Code = code
};
currencyWeekPeriodModel.Currencies.Add(model);
}
}
result.Add(itemModel);
startDate = startDate.AddMonths(1);
}
return(result.OrderBy(e => e.Year).ThenBy(e => e.Month));
}
public void MedianCurrencyTest()
{
var currencyCollection = new CurrencyCollection();
var currency1 = _currencyFactory.Create("USD", 1, 100, DateTime.Today);
var currency2 = _currencyFactory.Create("USD", 1, 200, DateTime.Today);
var currency3 = _currencyFactory.Create("USD", 1, 300, DateTime.Today);
currencyCollection.Add(currency1);
currencyCollection.Add(currency2);
currencyCollection.Add(currency3);
var median = currencyCollection.Median();
Assert.True(currencyCollection.Count == 3, "CurrencyCollection len <> 3");
Assert.True(median == 200.0m, $"{median} <> {200.0m}");
}