23 lines
No EOL
648 B
C#
23 lines
No EOL
648 B
C#
using Iceshrimp.Backend.Core.Extensions;
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using Visus.Cuid;
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namespace Iceshrimp.Backend.Core.Helpers;
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public static class IdHelpers
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{
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private const long Time2000 = 946684800000;
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public static string GenerateSlowflakeId(DateTime? createdAt = null)
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{
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if (createdAt?.Kind is not null and not DateTimeKind.Utc)
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createdAt = createdAt.Value.ToUniversalTime();
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createdAt ??= DateTime.UtcNow;
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var cuid = new Cuid2(8);
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var now = (long)createdAt.Value.Subtract(DateTime.UnixEpoch).TotalMilliseconds;
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var time = Math.Max(now - Time2000, 0);
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var timestamp = time.ToBase36().PadLeft(8, '0');
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return timestamp + cuid;
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}
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} |