public async Task <(IReadOnlyDictionary <ulong, int> Data, DateTimeOffset?WhenCached)> GetOrFillAsync(SocketGuild guild, TimeSpan maxAge, Func <double, Task> onProgress = null)
{
if (maxAge < TimeSpan.Zero)
{
throw new ArgumentException("Can't be negative", nameof(maxAge));
}
using (await _lock.ClaimAsync())
{
if (_data != null && _updated + maxAge > DateTimeOffset.UtcNow && _boundGuildId == guild.Id)
{
return(_data, _updated);
}
_data = new Dictionary <ulong, int>();
_updated = DateTimeOffset.UtcNow;
_boundGuildId = guild.Id;
foreach (var role in guild.Roles.Select(x => x.Id))
{
_data[role] = 0;
}
if (onProgress != null)
{
await onProgress(0);
}
var processed = 0;
var batches = 0;
await foreach (var batch in guild.GetUsersAsync())
{
_logger.LogInformation("Fetched {Count} users", batch.Count);
foreach (var user in batch)
{
foreach (var role in user.RoleIds)
{
if (_data.TryGetValue(role, out var value))
{
_data[role] = value + 1;
}
// No else to track only existing roles (sometimes Discord is stupid and keeps deleted roles on users)
}
}
processed += batch.Count;
batches++;
if (onProgress != null && batches % 3 == 0)
{
await onProgress((double)processed / guild.MemberCount);
}
}
return(_data, null);
}
}