async Task <RescueTicket> CreateAsync(string user, RescueMode mode)
{
RescueTicket rescueTicket = null;
using (DB db = await DB.CreateAsync(dbUrl))
{
var sb = new StringBuilder();
foreach (var b in BitConverter.GetBytes(DateTime.Now.Ticks))
{
sb.Append(b.ToString("X2"));
}
bool duplicate;
int tryCount = 0;
do
{
duplicate = false;
rescueTicket = new RescueTicket
{
mode = mode,
user_id = user,
id = "ST-" + sb + StringExt.RandomSecureString(13),
code = StringExt.RandomString(4, "0123456789")
};
try
{
if (!await rescueTicket.SaveAsync(db))
{
rescueTicket = null;
}
}
catch (MySql.Data.MySqlClient.MySqlException e)
{
rescueTicket = null;
// if the ticketId is already taken, try another
duplicate = (e.Number == 1062);
tryCount++;
}
}while (duplicate && (tryCount < 10));
if (rescueTicket == null)
{
throw new Exception("Ticket create fails. Impossible generate a ticketId");
}
}
return(rescueTicket);
}
public async Task <RescueTicket> CreateRescueAsync(string user, RescueMode mode)
{
return(await CreateAsync(user, mode));
}
