46 lines
1.7 KiB
C#
46 lines
1.7 KiB
C#
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namespace SIGCM2.Application.Common;
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/// <summary>
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/// Extension methods for <see cref="TimeProvider"/> that expose Argentina-localized
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/// date helpers. Handles the UTC-3 offset cross-platform (IANA / Windows TZ IDs).
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///
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/// UDT-011: Cat2 fields (VigenciaDesde, etc.) must use civil Argentine date, never
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/// raw UTC, to avoid date-creep during the 22:00–23:59 window.
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/// </summary>
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public static class TimeProviderArgentinaExtensions
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{
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// IANA TZ id — Linux / macOS / .NET 8+ on Windows with ICU
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public const string ArgentinaTimeZoneId = "America/Argentina/Buenos_Aires";
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// Windows built-in TZ id — fallback for environments without ICU
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public const string ArgentinaTimeZoneIdWindows = "Argentina Standard Time";
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private static readonly TimeZoneInfo ArgentinaTz = LoadArgentinaTz();
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/// <summary>
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/// Returns today's civil date in Argentina timezone, computed from the
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/// <see cref="TimeProvider"/> UTC clock.
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/// Safe in tests via <c>FakeTimeProvider</c>; safe in production via
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/// <c>TimeProvider.System</c>.
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/// </summary>
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public static DateOnly GetArgentinaToday(this TimeProvider timeProvider)
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{
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var utcNow = timeProvider.GetUtcNow();
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var argentinaNow = TimeZoneInfo.ConvertTime(utcNow, ArgentinaTz);
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return DateOnly.FromDateTime(argentinaNow.DateTime);
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}
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private static TimeZoneInfo LoadArgentinaTz()
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{
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try
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{
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return TimeZoneInfo.FindSystemTimeZoneById(ArgentinaTimeZoneId);
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}
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catch (TimeZoneNotFoundException)
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{
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// Windows without ICU: fall back to built-in Windows TZ name
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return TimeZoneInfo.FindSystemTimeZoneById(ArgentinaTimeZoneIdWindows);
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}
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}
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}
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