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https://github.com/duplicati/duplicati.git
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f0f68dfebf
On some locales, odd strings would parse as valid full dates, causing relative dates to be incorrectly calculated. This commit fixes the issues and revisits the DST aware calculations with more tests.
91 lines
3.2 KiB
C#
91 lines
3.2 KiB
C#
// Copyright (C) 2025, The Duplicati Team
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// https://duplicati.com, hello@duplicati.com
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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#nullable enable
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using System;
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using System.Collections.Generic;
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using System.Linq;
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namespace Duplicati.Library.Utility;
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/// <summary>
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/// A helper class to get the time zone information
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/// </summary>
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public static class TimeZoneHelper
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{
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/// <summary>
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/// A record to display the time zone
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/// </summary>
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/// <param name="Id">The time zone id</param>
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/// <param name="DisplayName">The display name of the time zone</param>
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/// <param name="CurrentUtcOffset">The base UTC offset of the time zone</param>
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public record TimeZoneDisplay(string Id, string DisplayName, TimeSpan CurrentUtcOffset);
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/// <summary>
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/// Get the local (system) time zone
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/// </summary>
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/// <returns>The local time zone</returns>
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public static string GetLocalTimeZone()
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=> TimeZoneInfo.Local.Id;
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/// <summary>
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/// Get the time zones on this system
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/// </summary>
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/// <returns>The time zones</returns>
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public static IEnumerable<TimeZoneDisplay> GetTimeZones()
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{
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foreach (var tz in TimeZoneInfo.GetSystemTimeZones())
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yield return new TimeZoneDisplay(tz.Id, tz.DisplayName, tz.GetUtcOffset(DateTime.Now));
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}
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/// <summary>
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/// Get the time zone by id
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/// </summary>
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/// <param name="id">The time zone id</param>
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/// <returns>The time zone</returns>
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public static TimeZoneInfo? GetTimeZoneById(string id)
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{
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try
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{
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return TimeZoneInfo.FindSystemTimeZoneById(id);
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}
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catch
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{
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}
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return null;
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}
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/// <summary>
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/// Search for a time zone
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/// </summary>
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/// <param name="search">The search string</param>
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/// <returns>The time zone</returns>
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public static TimeZoneInfo? FindTimeZone(string search)
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{
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var tzi = GetTimeZoneById(search);
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if (tzi != null)
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return tzi;
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return TimeZoneInfo.GetSystemTimeZones()
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.FirstOrDefault(tz => tz.Id.Equals(search, StringComparison.OrdinalIgnoreCase) || tz.DisplayName.Contains(search, StringComparison.OrdinalIgnoreCase));
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}
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}
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