65 lines
2.1 KiB
C#
65 lines
2.1 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Diagnostics.CodeAnalysis;
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using System.Text.RegularExpressions;
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namespace Emby.Naming.Video
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{
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/// <summary>
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/// <see href="http://kodi.wiki/view/Advancedsettings.xml#video" />.
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/// </summary>
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public static class CleanStringParser
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{
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/// <summary>
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/// Attempts to extract clean name with regular expressions.
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/// </summary>
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/// <param name="name">Name of file.</param>
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/// <param name="expressions">List of regex to parse name and year from.</param>
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/// <param name="newName">Parsing result string.</param>
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/// <returns>True if parsing was successful.</returns>
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public static bool TryClean([NotNullWhen(true)] string? name, IReadOnlyList<Regex> expressions, out ReadOnlySpan<char> newName)
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{
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if (string.IsNullOrEmpty(name))
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{
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newName = ReadOnlySpan<char>.Empty;
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return false;
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}
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// Iteratively apply the regexps to clean the string.
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bool cleaned = false;
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for (int i = 0; i < expressions.Count; i++)
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{
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if (TryClean(name, expressions[i], out newName))
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{
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cleaned = true;
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name = newName.ToString();
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}
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}
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newName = cleaned ? name.AsSpan() : ReadOnlySpan<char>.Empty;
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return cleaned;
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}
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private static bool TryClean(string name, Regex expression, out ReadOnlySpan<char> newName)
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{
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var match = expression.Match(name);
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int index = match.Index;
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if (match.Success)
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{
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var found = match.Groups.TryGetValue("cleaned", out var cleaned);
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if (!found || cleaned == null)
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{
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newName = ReadOnlySpan<char>.Empty;
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return false;
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}
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newName = name.AsSpan().Slice(cleaned.Index, cleaned.Length);
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return true;
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}
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newName = ReadOnlySpan<char>.Empty;
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return false;
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}
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}
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}
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