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https://github.com/ppy/osu
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80 lines
3.3 KiB
C#
80 lines
3.3 KiB
C#
// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
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// See the LICENCE file in the repository root for full licence text.
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using System;
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using System.Diagnostics.CodeAnalysis;
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using System.Text.RegularExpressions;
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namespace osu.Game.Rulesets.Edit
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{
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public static class EditorTimestampParser
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{
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/// <summary>
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/// Used for parsing in contexts where we don't want e.g. normal times of day to be parsed as timestamps (e.g. chat)
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/// Original osu-web regex:
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/// https://github.com/ppy/osu-web/blob/3b1698639244cfdaf0b41c68bfd651ea729ec2e3/resources/js/utils/beatmapset-discussion-helper.ts#L78
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/// </summary>
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/// <example>
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/// 00:00:000 (...) - test
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/// </example>
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public static readonly Regex TIME_REGEX_STRICT = new Regex(@"\b(((?<minutes>\d{2,}):(?<seconds>[0-5]\d)[:.](?<milliseconds>\d{3}))(?<selection>\s\([^)]+\))?)", RegexOptions.Compiled);
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/// <summary>
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/// Used for editor-specific context wherein we want to try as hard as we can to process user input as a timestamp.
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/// </summary>
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/// <example>
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/// <list type="bullet">
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/// <item>1 - parses to 00:00:001 (bare numbers are treated as milliseconds)</item>
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/// <item>1:2 - parses to 01:02:000</item>
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/// <item>1:02 - parses to 01:02:000</item>
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/// <item>1:92 - does not parse</item>
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/// <item>1:02:3 - parses to 01:02:003</item>
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/// <item>1:02:300 - parses to 01:02:300</item>
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/// <item>1:02:300 (1,2,3) - parses to 01:02:300 with selection</item>
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/// </list>
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/// </example>
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private static readonly Regex time_regex_lenient = new Regex(
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@"^(((?<minutes>\d{1,3}):(?<seconds>([0-5]?\d))([:.](?<milliseconds>\d{0,3}))?)(?<selection>\s\([^)]+\))?)(?<suffix>\s-.*)?$",
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RegexOptions.Compiled | RegexOptions.Singleline
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);
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public static bool TryParse(string timestamp, [NotNullWhen(true)] out TimeSpan? parsedTime, out string? parsedSelection)
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{
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if (double.TryParse(timestamp, out double msec))
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{
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parsedTime = TimeSpan.FromMilliseconds(msec);
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parsedSelection = null;
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return true;
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}
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Match match = time_regex_lenient.Match(timestamp);
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if (!match.Success)
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{
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parsedTime = null;
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parsedSelection = null;
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return false;
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}
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int timeMin, timeSec, timeMsec;
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int.TryParse(match.Groups[@"minutes"].Value, out timeMin);
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int.TryParse(match.Groups[@"seconds"].Value, out timeSec);
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int.TryParse(match.Groups[@"milliseconds"].Value, out timeMsec);
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// somewhat sane limit for timestamp duration (10 hours).
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if (timeMin >= 600)
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{
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parsedTime = null;
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parsedSelection = null;
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return false;
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}
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parsedTime = TimeSpan.FromMinutes(timeMin) + TimeSpan.FromSeconds(timeSec) + TimeSpan.FromMilliseconds(timeMsec);
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parsedSelection = match.Groups[@"selection"].Value.Trim();
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parsedSelection = !string.IsNullOrEmpty(parsedSelection) ? parsedSelection[1..^1] : null;
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return true;
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}
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}
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}
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