92 lines
3.2 KiB
C#
92 lines
3.2 KiB
C#
// Copyright (C) 2026, 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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