/// <summary>
/// Gets a list of all tickers in a specific range provided by the "https://api.coinmarketcap.com/v2/ticker/" API endpoint. Performs an asynchronous call to the API.
/// </summary>
/// <param name="converter">An optional supported currency converter.</param>
/// <returns>Returns a <see cref="Task{CmcResponse{Dictionary{string, CmcTicker}}}"/> with the result provided by the API, or any error occurred during the call.</returns>
/// <seealso cref="SupportedFiatCurrencyConverters"/>.
/// <seealso cref="SupportedCryptoCurrencyConverters"/>.
public async Task <CmcResponse <Dictionary <string, CmcTicker> > > GetAllTickersAsync(string converter = null)
{
var cmcRequest = new CmcRequestSettings()
{
Endpoint = CmcEndpoint.Ticker,
CurrencyConverter = converter,
StartPosition = CmcRequestSettings.DefaultStartPosition,
Limit = CmcRequestSettings.DefaultLimit
};
var response = await ExecuteRequest <Dictionary <string, CmcTicker> >(cmcRequest);
if (!response.Success)
{
return(response);
}
int totalCurrencyCount = response.Metadata.CryptocurrenciesCount;
int currentCounter = response.Data.Count;
cmcRequest.StartPosition = 1; //set to one, so in the loop it can be incremented by LIMIT (100) => 101, 201, 301...
var tempResponse = response;
while (currentCounter < totalCurrencyCount && tempResponse.Success)
{
cmcRequest.StartPosition += cmcRequest.Limit;
tempResponse = await ExecuteRequest <Dictionary <string, CmcTicker> >(cmcRequest);
if (!tempResponse.Success)
{
return(tempResponse);
}
foreach (var item in tempResponse.Data)
{
if (!response.Data.ContainsKey(item.Key))
{
response.Data.Add(item.Key, item.Value);
}
}
currentCounter = response.Data.Count;
}
return(response);
}
/// <summary>
/// Executes a request to "https://api.coinmarketcap.com/" API using the specified settings.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="settings">The settings determining which endpoint will be called and if any parameter should be submitted to the endpoint.</param>
/// <returns></returns>
private async Task <CmcResponse <T> > ExecuteRequest <T>(CmcRequestSettings settings)
{
string content = String.Empty;
try
{
using (var http = new HttpClient())
{
var response = await http.GetAsync(settings.GetRelativeUrl());
content = await response.Content.ReadAsStringAsync();
if (!response.IsSuccessStatusCode)
{
var error = JsonConvert.DeserializeObject <CmcResponse <T> >(content);
error.Metadata.ErrorMessage = $"HTTP Response - Status code: {response.StatusCode}. Message: {error.Metadata.ErrorMessage}.";
return(error);
}
//Gets the result and sets success accordingly. Empty error message means success.
var result = JsonConvert.DeserializeObject <CmcResponse <T> >(content);
return(result);
}
}
catch (JsonReaderException jre)
{
return(new CmcResponse <T>($"Exception: '{nameof(JsonSerializationException)}'." +
$"{Environment.NewLine}" +
$"Error occurred at Path: '{jre.Path}'; Line number: '{jre.LineNumber}', Line position: '{jre.LinePosition}'." +
$"{Environment.NewLine}" +
$"Received data: '{content}'."
));
}
catch (JsonSerializationException jse)
{
return(new CmcResponse <T>($"Exception: '{nameof(JsonSerializationException)}'." +
$"{Environment.NewLine}" +
$"Message: '{jse.Message}'." +
$"{Environment.NewLine}" +
$"Received data: '{content}'."
));
}
catch (CryptoMarketDataException cmde)
{
return(new CmcResponse <T>($"Exception: '{nameof(CryptoMarketDataException)}'" +
$"{Environment.NewLine}" +
$"Message: '{cmde.Message}'." +
$"{Environment.NewLine}" +
$"Inner exception: '{(cmde.InnerException != null ? cmde.InnerException.Message : String.Empty)}'."
));
}
catch (Exception e)
{
return(new CmcResponse <T>($"Exception: '{e.GetType()}'" +
$"{Environment.NewLine}" +
$"Message: '{e.Message}'." +
$"{Environment.NewLine}" +
$"Inner exception: '{(e.InnerException != null ? e.InnerException.Message : String.Empty)}'."
));
}
}