337 lines
11 KiB
C#
337 lines
11 KiB
C#
/*
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*
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* (c) Copyright Ascensio System Limited 2010-2018
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*
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* This program is freeware. You can redistribute it and/or modify it under the terms of the GNU
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* General Public License (GPL) version 3 as published by the Free Software Foundation (https://www.gnu.org/copyleft/gpl.html).
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* In accordance with Section 7(a) of the GNU GPL its Section 15 shall be amended to the effect that
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* Ascensio System SIA expressly excludes the warranty of non-infringement of any third-party rights.
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*
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* THIS PROGRAM IS DISTRIBUTED WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY OR
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* FITNESS FOR A PARTICULAR PURPOSE. For more details, see GNU GPL at https://www.gnu.org/copyleft/gpl.html
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*
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* You can contact Ascensio System SIA by email at sales@onlyoffice.com
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*
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* The interactive user interfaces in modified source and object code versions of ONLYOFFICE must display
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* Appropriate Legal Notices, as required under Section 5 of the GNU GPL version 3.
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*
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* Pursuant to Section 7 § 3(b) of the GNU GPL you must retain the original ONLYOFFICE logo which contains
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* relevant author attributions when distributing the software. If the display of the logo in its graphic
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* form is not reasonably feasible for technical reasons, you must include the words "Powered by ONLYOFFICE"
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* in every copy of the program you distribute.
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* Pursuant to Section 7 § 3(e) we decline to grant you any rights under trademark law for use of our trademarks.
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*
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*/
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namespace ASC.Common.Utils;
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[Singletone]
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public class TimeZoneConverter
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{
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private TimeZoneInfo _defaultTimeZone;
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private IEnumerable<MapZone> _mapZones;
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private bool _customMode;
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private bool _isMono;
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private Dictionary<string, string> _translations;
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private readonly IConfiguration _configuration;
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private readonly ILog _logger;
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public TimeZoneConverter(IConfiguration configuration, ILog logger)
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{
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_logger = logger;
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_configuration = configuration;
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InitMapZones();
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InitTranslations();
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}
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public string GetTimeZoneDisplayName(TimeZoneInfo tz)
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{
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var displayName = GetTimeZoneName(tz);
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if (!displayName.StartsWith("(UTC") && !displayName.StartsWith("UTC"))
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{
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if (tz.BaseUtcOffset != TimeSpan.Zero)
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{
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var offSet = tz.BaseUtcOffset < TimeSpan.Zero ? "-" : "+";
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var name = tz.BaseUtcOffset.ToString(@"hh\:mm");
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displayName = $"(UTC{offSet}{name}) {displayName}";
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}
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else
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{
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displayName = "(UTC) " + displayName;
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}
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}
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return displayName;
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}
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public string OlsonTzId2WindowsTzId(string olsonTimeZoneId, bool defaultIfNoMatch = true)
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{
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var mapZone = GetMapZoneByWindowsTzId(olsonTimeZoneId);
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if (mapZone != null)
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{
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return olsonTimeZoneId; //already Windows
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}
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mapZone = GetMapZoneByOlsonTzId(olsonTimeZoneId);
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if (mapZone != null)
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{
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return mapZone.WindowsTimeZoneId;
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}
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_logger.Error($"OlsonTimeZone {olsonTimeZoneId} not found");
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return defaultIfNoMatch ? "UTC" : null;
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}
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public string WindowsTzId2OlsonTzId(string windowsTimeZoneId, bool defaultIfNoMatch = true)
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{
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var mapZone = GetMapZoneByOlsonTzId(windowsTimeZoneId);
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if (mapZone != null)
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{
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return windowsTimeZoneId; //already Olson
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}
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mapZone = GetMapZoneByWindowsTzId(windowsTimeZoneId);
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if (mapZone != null)
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{
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return mapZone.OlsonTimeZoneId;
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}
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_logger.Error($"WindowsTimeZone {windowsTimeZoneId} not found");
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return defaultIfNoMatch ? "Etc/GMT" : null;
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}
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public TimeZoneInfo GetTimeZone(string timeZoneId, bool defaultIfNoMatch = true)
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{
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var defaultTimezone = GetTimeZoneDefault();
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if (string.IsNullOrEmpty(timeZoneId))
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{
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return defaultIfNoMatch ? defaultTimezone : null;
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}
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try
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{
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return TimeZoneInfo.FindSystemTimeZoneById(timeZoneId);
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}
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catch (TimeZoneNotFoundException)
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{
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try
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{
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var mapZone = GetMapZoneByOlsonTzId(timeZoneId);
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if (mapZone != null)
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{
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return TimeZoneInfo.FindSystemTimeZoneById(mapZone.WindowsTimeZoneId);
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}
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mapZone = GetMapZoneByWindowsTzId(timeZoneId);
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if (mapZone != null)
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{
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return TimeZoneInfo.FindSystemTimeZoneById(mapZone.OlsonTimeZoneId);
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}
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_logger.InfoFormat("TimeZone {0} not found", timeZoneId);
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return defaultIfNoMatch ? GetTimeZoneByOffset(timeZoneId) ?? defaultTimezone : null;
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}
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catch (Exception error)
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{
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_logger.Error(error);
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return defaultIfNoMatch ? defaultTimezone : null;
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}
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}
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catch (Exception error)
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{
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_logger.Error(error);
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return defaultIfNoMatch ? defaultTimezone : null;
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}
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}
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private MapZone GetMapZoneByOlsonTzId(string olsonTimeZoneId)
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{
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return _mapZones.FirstOrDefault(x =>
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x.OlsonTimeZoneId.Equals(olsonTimeZoneId, StringComparison.CurrentCultureIgnoreCase));
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}
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private MapZone GetMapZoneByWindowsTzId(string windowsTimeZoneId)
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{
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return _mapZones.FirstOrDefault(x =>
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x.WindowsTimeZoneId.Equals(windowsTimeZoneId, StringComparison.CurrentCultureIgnoreCase) &&
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x.Territory.Equals("001", StringComparison.CurrentCultureIgnoreCase));
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}
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private TimeZoneInfo GetTimeZoneByOffset(string timeZoneId)
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{
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var systemTimeZones = TimeZoneInfo.GetSystemTimeZones();
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var timeZone = systemTimeZones.FirstOrDefault(tz =>
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tz.DisplayName == timeZoneId ||
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tz.StandardName == timeZoneId ||
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tz.DaylightName == timeZoneId);
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if (timeZone != null)
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{
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return timeZone;
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}
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var regex = new Regex(@"[+-][0-9]{2}:[0-9]{2}\b");
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var offsetStr = regex.Match(timeZoneId).Value.TrimStart('+');
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if (string.IsNullOrEmpty(offsetStr))
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{
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return null;
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}
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if (!TimeSpan.TryParse(offsetStr, out var offset))
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{
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return null;
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}
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return systemTimeZones.FirstOrDefault(tz => tz.BaseUtcOffset == offset);
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}
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private void InitMapZones()
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{
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try
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{
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var assembly = Assembly.GetExecutingAssembly();
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using var stream = assembly.GetManifestResourceStream("ASC.Common.Utils.TimeZoneConverter.windowsZones.xml");
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var xml = XElement.Load(stream);
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_mapZones = from row in xml.XPathSelectElements("*/mapTimezones/mapZone")
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let olsonTimeZones = row.Attribute("type").Value.Split(' ')
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from olsonTimeZone in olsonTimeZones
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select new MapZone
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{
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OlsonTimeZoneId = olsonTimeZone,
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WindowsTimeZoneId = row.Attribute("other").Value,
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Territory = row.Attribute("territory").Value
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};
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_mapZones = _mapZones.ToList();
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}
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catch (Exception error)
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{
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_mapZones = new MapZone[0];
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_logger.Error(error);
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}
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}
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public string GetTimeZoneName(TimeZoneInfo timeZone)
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{
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if (!_customMode)
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{
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return _isMono ? timeZone.Id : timeZone.DisplayName;
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}
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return _translations.ContainsKey(timeZone.Id) ? _translations[timeZone.Id] : timeZone.DisplayName;
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}
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private TimeZoneInfo GetTimeZoneDefault()
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{
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if (_defaultTimeZone == null)
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{
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try
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{
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var tz = TimeZoneInfo.Local;
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if (Path.DirectorySeparatorChar == '/')
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{
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if (tz.StandardName == "UTC" || tz.StandardName == "UCT")
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{
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tz = TimeZoneInfo.Utc;
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}
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else
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{
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var id = string.Empty;
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if (File.Exists("/etc/timezone"))
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{
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_isMono = true;
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id = File.ReadAllText("/etc/timezone").Trim();
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}
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if (string.IsNullOrEmpty(id))
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{
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var psi = new ProcessStartInfo
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{
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FileName = "/bin/bash",
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Arguments = "date +%Z",
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RedirectStandardOutput = true,
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UseShellExecute = false,
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};
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using var p = Process.Start(psi);
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if (p.WaitForExit(1000))
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{
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id = p.StandardOutput.ReadToEnd();
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}
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p.Close();
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}
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if (!string.IsNullOrEmpty(id))
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{
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tz = TimeZoneInfo.GetSystemTimeZones().FirstOrDefault(z => z.Id == id) ?? tz;
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}
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}
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}
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_defaultTimeZone = tz;
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}
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catch (Exception)
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{
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// ignore
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_defaultTimeZone = TimeZoneInfo.Utc;
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}
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}
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return _defaultTimeZone;
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}
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private void InitTranslations()
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{
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try
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{
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_customMode = _configuration["core:custom-mode"] == "true";
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if (!_customMode)
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{
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_translations = new Dictionary<string, string>();
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return;
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}
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var assembly = Assembly.GetExecutingAssembly();
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using var stream = assembly.GetManifestResourceStream("ASC.Common.Utils.TimeZoneConverter.timeZoneNames.xml");
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var xml = XElement.Load(stream);
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_translations = (from row in xml.XPathSelectElements("*/zone")
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select new KeyValuePair<string, string>(row.Attribute("type").Value, row.Value)
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).ToDictionary(item => item.Key, item => item.Value);
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}
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catch (Exception error)
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{
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_translations = new Dictionary<string, string>();
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_logger.Error(error);
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}
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}
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private class MapZone
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{
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public string OlsonTimeZoneId { get; set; }
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public string WindowsTimeZoneId { get; set; }
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public string Territory { get; set; }
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}
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} |