/// <summary>
/// Keeps trying to checkout a guild (with backoff) until either maxTimeout has been hit,
/// or a value has been returned that's not Locked.
/// </summary>
/// <param name="repo">A repo. May not be null.</param>
/// <param name="guildId">An id associated with a guild.</param>
/// <param name="maxTimeout">The maximum amount of time to spend waiting for this to unlock.</param>
/// <param name="recycleResult">A preallocated result that should be returned if passed in.</param>
/// <returns>The result.</returns>
public static async Task <GuildCheckoutResult> WaitForNotLockedCheckout(
this IGuildRepository repo,
Snowflake guildId,
TimeSpan maxTimeout,
GuildCheckoutResult recycleResult = null)
{
Stopwatch timer = new Stopwatch();
var retVal = recycleResult ?? new GuildCheckoutResult();
TimeSpan nextDelay = TimeSpan.FromMilliseconds(1);
timer.Start();
retVal = await repo.Checkout(guildId, retVal);
while (retVal.Result == GuildCheckoutResult.ResultType.Locked &&
timer.Elapsed + nextDelay < maxTimeout)
{
await Task.Delay(nextDelay);
retVal = await repo.Checkout(guildId, retVal);
nextDelay *= 1.5;
}
return(retVal);
}