public async Task <HistoryRatesDataObject?> GetHistoryRates(string baseCurrency, string target, DateTime startDate, DateTime endDate)
{
string url = $"https://api.exchangeratesapi.io/history?start_at={startDate.ToString("yyyy-MM-dd")}&end_at={endDate.ToString("yyyy-MM-dd")}&base={baseCurrency}&symbols={target}";
var result = await _httpClient.GetAsync(url);
if (result?.Content == null)
{
return(null);
}
var content = await result.Content.ReadAsStringAsync();
var ratesToken = JObject.Parse(content).GetValue("rates").ToList();
List <JProperty> properties = new List <JProperty>();
ratesToken.ForEach(x => properties.Add((JProperty)x));
Dictionary <string, float> keyValuePairs = new Dictionary <string, float>();
properties.ForEach(x => keyValuePairs.Add(x.Name, (float)x.Value[target]));
HistoryRatesDataObject historyRatesDataObject = new HistoryRatesDataObject {
HistoryRates = keyValuePairs, Base = baseCurrency, end_at = endDate.ToString("yyyy-MM-dd"), start_at = startDate.ToString("yyyy-MM-dd"), Target = target
};
return(historyRatesDataObject);
}
public async Task AddRecordAsync(HistoryRatesDataObject record)
{
await CheckInit(Connection);
record.DatabaseKey = record.GenerateDBKey();
record.SerializeDictionary();
await Connection.InsertAsync(record);
}
public LocalRateViewModel(HistoryRatesDataObject dataObj)
{
CurrencyGridViewModel = new CurrencyDataGridViewModel();
_dataObj = dataObj;
Title = $"1 {_dataObj.Base} = x {_dataObj.Target} - dane lokalne";
}
