public async Task <ExchangeRates> Rate(string bank, DateTime date, string exchangeFrom)
{
var opt = mem.SqlOrMemory("DBRead");
using (var cnt = new InfoValutarContext(opt.Options))
{
var data = cnt.RateQ(bank).Where(it =>
EF.Functions.DateDiffDay(it.Date, date) == 0 &&
it.ExchangeFrom == exchangeFrom)
.Select(it => new ExchangeRates()
{
Bank = bank,
Date = it.Date,
ExchangeFrom = it.ExchangeFrom,
ExchangeTo = it.ExchangeTo,
ExchangeValue = it.ExchangeValue
});
return(await data.FirstOrDefaultAsync());
}
}
public async Task <int> Save(params ExchangeRates[] er)
{
var data = er.Select(it => it.Bank?.ToLower()).Distinct();
var opt = mem.SqlOrMemory("DBWrite");
using (var cnt = new InfoValutarContext(opt.Options))
{
foreach (var item in data)
{
var dataToSave = er
.Where(it => it.Bank?.ToLower() == item);
switch (item)
{
case "ecb":
cnt.Ecb.AddRange(
dataToSave.Select(it =>
new Ecb()
{
Date = it.Date,
ExchangeFrom = it.ExchangeFrom,
ExchangeTo = it.ExchangeTo,
ExchangeValue = it.ExchangeValue
}).ToArray());
break;
case "bnr":
cnt.Nbr.AddRange(
dataToSave.Select(it =>
new Nbr()
{
Date = it.Date,
ExchangeFrom = it.ExchangeFrom,
ExchangeTo = it.ExchangeTo,
ExchangeValue = it.ExchangeValue
}).ToArray());
break;
default:
throw new ArgumentException($"cannot save bank {item}");
}
}
var nr = await cnt.SaveChangesAsync();
return(nr);
}
}