68 lines
2.5 KiB
C#
68 lines
2.5 KiB
C#
/*
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* dbMango
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*
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* Copyright 2025 Deutsche Bank AG
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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using System.Diagnostics;
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namespace Rms.Risk.Mango.Pivot.UI.Services;
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public class DateUtil
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{
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public static int DateToIntDate(DateTime date)
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{
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var dateStr = date.ToString("yyyy-MM-dd");
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var tokens = dateStr.Split('-');
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var joined = tokens[0] + tokens[1] + tokens[2];
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return int.Parse(joined);
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}
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public static readonly DateTime UnixEpoch = new(
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1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
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public static DateTime FromMillisecondsSinceUnixEpoch(long milliseconds) => UnixEpoch.AddMilliseconds(milliseconds);
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public static ulong ToMillisecondsSinceUnixEpoch(DateTime dateTimeUtc) => (ulong)(dateTimeUtc - UnixEpoch).TotalMilliseconds;
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public static readonly DateTime LocalEpoch = new(
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1970, 1, 1, 0, 0, 0, DateTimeKind.Local);
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public static DateTime FromMillisecondsSinceLocalEpoch(long milliseconds) => LocalEpoch.AddMilliseconds(milliseconds);
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public static long ToMillisecondsSinceLocalEpoch(DateTime dateTime) => (long)(dateTime - LocalEpoch).TotalMilliseconds;
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private static readonly TimeZoneInfo _londonTzInfo = TimeZoneInfo.FindSystemTimeZoneById("GMT Standard Time");
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public static DateTime LondonToUTC( DateTime timeInLondonTz )
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{
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Debug.Assert( timeInLondonTz.Kind == DateTimeKind.Unspecified );
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return TimeZoneInfo.ConvertTimeToUtc( timeInLondonTz, _londonTzInfo );
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}
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public static DateTime UTCToLondon( DateTime utcTime )
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{
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Debug.Assert( utcTime.Kind == DateTimeKind.Utc );
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var timeInLondonTz = TimeZoneInfo.ConvertTimeFromUtc( utcTime, _londonTzInfo );
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return timeInLondonTz;
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}
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/// <summary>
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/// Round down to the nearest second
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/// </summary>
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public static DateTime RoundTime( DateTime d ) => new(d.Year,d.Month,d.Day,d.Hour,d.Minute,d.Second, d.Kind);
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} |