public async Task <ResultsLoadBankData[]> LoadAndSave()
{
var items = providers.Banks().Select(it =>
new KeyValuePair <string, ResultsLoadBankData>(it,
new ResultsLoadBankData()
{
Bank = it,
ErrorMessage = "error loading",
HasSuccess = false,
NrRecordsSaved = 0,
NrRecordsLoaded = -1
})
);;
var lst = new Dictionary <string, ResultsLoadBankData>(items);
var rates =
providers.LoadExchange()
.Select(it => it.GetActualRates())
.ToArray();
//TODO: how to load async all async enumerables?
//TODO: how to report error if one fails?
var allRates = new List <ExchangeRates>();
foreach (var rateAsync in rates)
{
try
{
var ratesBank = await rateAsync;
allRates.AddRange(ratesBank);
}
catch (Exception)
{
}
}
var groups = allRates.GroupBy(it => it.Bank).ToDictionary(it => it.Key, it => it.ToArray());
foreach (var bank in groups.Keys)
{
var item = lst[bank];
item.HasSuccess = true;
item.ErrorMessage = null;
item.NrRecordsLoaded = groups[bank].Length;
item.NrRecordsSaved = 0;
foreach (var rate in groups[bank])
{
try
{
if (await ret.Exists(rate))
{
continue;
}
var nr = await save.Save(rate);
item.NrRecordsSaved++;
}
catch (Exception ex)
{
//TODO:log
item.ErrorMessage = ex.Message;
item.HasSuccess = false;
}
}
}
return(lst.Values.ToArray());
}
public IEnumerable <string> Banks()
{
return(_prov.Banks());
}