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osu-lazer/osu.Game/Rulesets/Edit/EditorTimestampParser.cs
2024-07-28 11:31:36 -04:00

80 lines
3.3 KiB
C#

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