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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
namespace Microsoft.AspNetCore.Authentication;
/// <summary>
/// Provides access to the normal system clock with precision in seconds.
/// </summary>
#pragma warning disable CS0618 // Type or member is obsolete
internal class TimeProviderClock : ISystemClock
#pragma warning restore CS0618 // Type or member is obsolete
{
private readonly TimeProvider _timeProvider;
internal TimeProviderClock() : this(TimeProvider.System) { }
internal TimeProviderClock(TimeProvider timeProvider)
{
ArgumentNullException.ThrowIfNull(timeProvider);
_timeProvider = timeProvider;
}
public DateTimeOffset UtcNow
{
get
{
// the clock measures whole seconds only, to have integral expires_in results, and
// because milliseconds do not round-trip serialization formats
var utcNowPrecisionSeconds = new DateTime((_timeProvider.GetUtcNow().Ticks / TimeSpan.TicksPerSecond) * TimeSpan.TicksPerSecond, DateTimeKind.Utc);
return new DateTimeOffset(utcNowPrecisionSeconds);
}
}
}
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