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| <Project Sdk="Microsoft.NET.Sdk"> | ||
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| <PropertyGroup> | ||
| <Version>1.0.0</Version> | ||
| <GenerateDocumentationFile>True</GenerateDocumentationFile> | ||
| <PackageLicenseExpression>MIT</PackageLicenseExpression> | ||
| </PropertyGroup> | ||
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| </Project> |
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| @@ -1,4 +1,5 @@ | ||
| @page "/timer" | ||
| @using DotNetThoughts.LocalTimeKit | ||
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| <PageTitle>Timing</PageTitle> | ||
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,138 @@ | ||
| namespace DotNetThoughts.TimeKeeping; | ||
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| public class TimeTravelersClock | ||
| { | ||
| public DateTimeOffset? FreezedAt { get; set; } | ||
| public DateTimeOffset? Frozen { get; set; } | ||
| public TimeSpan Offset { get; set; } = TimeSpan.Zero; | ||
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| public bool IsFrozen() | ||
| { | ||
| using var context = new OperationContext(); | ||
| return FreezedAt != null; | ||
| } | ||
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| public DateTimeOffset Reset() | ||
| { | ||
| using var context = new OperationContext(); | ||
| Frozen = null; | ||
| FreezedAt = null; | ||
| Offset = TimeSpan.Zero; | ||
| return UtcNow(); | ||
| } | ||
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| public DateTimeOffset Thaw() | ||
| { | ||
| using var context = new OperationContext(); | ||
| if (FreezedAt == null) | ||
| { | ||
| throw new InvalidOperationException("Cannot thaw when not frozen"); | ||
| } | ||
| Offset = Offset.Add(-RealTimeFrozen()); | ||
| FreezedAt = null; | ||
| Frozen = null; | ||
| return UtcNow(); | ||
| } | ||
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| public DateTimeOffset Freeze() | ||
| { | ||
| using var context = new OperationContext(); | ||
| FreezedAt = context.UtcNow(); | ||
| Frozen = UtcNow(); | ||
| return Frozen.Value; | ||
| } | ||
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| public DateTimeOffset Freeze(DateTimeOffset baseLine) | ||
| { | ||
| using var context = new OperationContext(); | ||
| Reset(); | ||
| SetBaseline(baseLine); | ||
| FreezedAt = context.UtcNow(); | ||
| Frozen = UtcNow(); | ||
| return Frozen.Value; | ||
| } | ||
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| public DateTimeOffset UtcNow() | ||
| { | ||
| using var context = new OperationContext(); | ||
| return Frozen ?? context.UtcNow().Add(Offset); | ||
| } | ||
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| public DateTimeOffset AdvanceDays(double days) | ||
| { | ||
| using var context = new OperationContext(); | ||
| return Advance(TimeSpan.FromDays(days)); | ||
| } | ||
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| public DateTimeOffset Advance(TimeSpan timeSpan) | ||
| { | ||
| using var context = new OperationContext(); | ||
| Offset = Offset.Add(timeSpan); | ||
| if (IsFrozen()) | ||
| { | ||
| Frozen = Frozen!.Value.Add(timeSpan); | ||
| } | ||
| return UtcNow(); | ||
| } | ||
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| public DateTimeOffset SetBaseline(DateTimeOffset baseLine) | ||
| { | ||
| if (IsFrozen()) throw new InvalidOperationException(); | ||
| using var context = new OperationContext(); | ||
| Offset = baseLine - context.UtcNow(); | ||
| return UtcNow(); | ||
| } | ||
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| public DateTimeOffset SetOffset(TimeSpan offset) | ||
| { | ||
| if (IsFrozen()) throw new InvalidOperationException(); | ||
| using var context = new OperationContext(); | ||
| Offset = offset; | ||
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| return UtcNow(); | ||
| } | ||
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| private TimeSpan RealTimeFrozen() | ||
| { | ||
| using var context = new OperationContext(); | ||
| return FreezedAt != null ? context.UtcNow() - FreezedAt.Value : TimeSpan.Zero; | ||
| } | ||
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| internal void From(TimeTravelersClock xSystemTime) | ||
| { | ||
| using var context = new OperationContext(); | ||
| Offset = xSystemTime.Offset; | ||
| FreezedAt = xSystemTime.FreezedAt; | ||
| Frozen = xSystemTime.Frozen; | ||
| } | ||
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| internal bool IsManipulated() | ||
| { | ||
| return Offset != TimeSpan.Zero || FreezedAt != null; | ||
| } | ||
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| internal class OperationContext : IDisposable | ||
| { | ||
| private static AsyncLocal<DateTimeOffset?> _operationNow = new AsyncLocal<DateTimeOffset?>(); | ||
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| private bool _shouldReset = false; | ||
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| public OperationContext() | ||
| { | ||
| if (_operationNow.Value == null) | ||
| { | ||
| _operationNow.Value = DateTimeOffset.UtcNow; | ||
| _shouldReset = true; | ||
| } | ||
| } | ||
| public void Dispose() | ||
| { | ||
| if (_shouldReset) | ||
| { | ||
| _operationNow.Value = null; | ||
| } | ||
| } | ||
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| public DateTimeOffset UtcNow() => _operationNow.Value!.Value; | ||
| } | ||
| } |