32 lines
1 KiB
C#
32 lines
1 KiB
C#
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using System.Text.RegularExpressions;
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using LANCommander.SDK.Enums;
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namespace LANCommander.Server.Services.Extensions;
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public static class IEnumerableExtensions
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{
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static Regex TitleComparisonExpression = new Regex(@"^(?:a|the|an)\s+", RegexOptions.Compiled | RegexOptions.CultureInvariant | RegexOptions.IgnoreCase);
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public static IOrderedEnumerable<T> OrderByTitle<T>(this IEnumerable<T> items, Func<T, string> keySelector, SortDirection direction = SortDirection.Ascending)
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{
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switch (direction)
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{
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case SortDirection.Ascending:
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default:
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return items.OrderBy(i =>
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{
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var key = keySelector.Invoke(i);
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return TitleComparisonExpression.Replace(key, "");
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});
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case SortDirection.Descending:
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return items.OrderByDescending(i =>
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{
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var key = keySelector.Invoke(i);
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return TitleComparisonExpression.Replace(key, "");
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});
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}
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}
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}
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