39 lines
1.2 KiB
C#
39 lines
1.2 KiB
C#
namespace EnotaryoPH.Web.Common.Extensions
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{
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public static class StringExtensions
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{
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private const char EqualsChar = '=';
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private const char Plus = '+';
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private const char Slash = '/';
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public static string DefaultIfEmpty(this string s, string defaultValue) => !string.IsNullOrWhiteSpace(s) ? s : (defaultValue ?? string.Empty);
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public static string NullIfWhiteSpace(this string s) => string.IsNullOrWhiteSpace(s) ? null : s;
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public static Guid ToGuidFromBase64(this string s)
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{
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if (s.Length != 22)
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{
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return Guid.Empty;
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}
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var id = s.AsSpan();
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Span<char> base64Chars = stackalloc char[24];
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for (var i = 0; i < 22; i++)
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{
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base64Chars[i] = id[i] switch
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{
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'-' => Slash,
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'_' => Plus,
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_ => id[i]
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};
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}
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base64Chars[22] = EqualsChar;
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base64Chars[23] = EqualsChar;
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Span<byte> idBytes = stackalloc byte[16];
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Convert.TryFromBase64Chars(base64Chars, idBytes, out _);
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return new Guid(idBytes);
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}
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}
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} |