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The ytimg variants are 16:9, so picking one by width handed a square tile far fewer pixels than it needed: a 96px cover got the 120x90 file and kept 90px after the crop. They are chosen by their short side now, the album art is preferred over the video frame when the search returns both, and the display sizes account for the tiles being up to 180px on a 2x screen.
56 lines
1.8 KiB
C#
56 lines
1.8 KiB
C#
namespace Musify.Infrastructure.Services
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{
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public static class YouTubeThumbnail
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{
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public static bool IsSquare(string url) =>
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url.Contains("googleusercontent.com", StringComparison.OrdinalIgnoreCase);
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public static string WithSize(string url, int size)
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{
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if (string.IsNullOrEmpty(url))
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return string.Empty;
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if (url.Contains("googleusercontent.com", StringComparison.OrdinalIgnoreCase))
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return ResizeGoogleUserContent(url, size);
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if (url.Contains("ytimg.com", StringComparison.OrdinalIgnoreCase))
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return ResizeYtImg(url, size);
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return url;
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}
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private static string ResizeGoogleUserContent(string url, int size)
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{
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var separator = url.LastIndexOf('=');
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var baseUrl = separator > 0 && IsSizeSuffix(url.AsSpan(separator + 1))
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? url[..separator]
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: url;
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return $"{baseUrl}=w{size}-h{size}-l90-rj";
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}
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private static string ResizeYtImg(string url, int size)
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{
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var queryStart = url.IndexOf('?');
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var path = queryStart >= 0 ? url[..queryStart] : url;
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var lastSlash = path.LastIndexOf('/');
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if (lastSlash < 0)
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return path;
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return $"{path[..lastSlash]}/{YtImgFileName(size)}";
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}
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private static string YtImgFileName(int size) => size switch
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{
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<= 90 => "default.jpg",
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<= 180 => "mqdefault.jpg",
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<= 360 => "hqdefault.jpg",
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_ => "maxresdefault.jpg"
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};
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private static bool IsSizeSuffix(ReadOnlySpan<char> suffix) =>
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suffix.Length > 1 && (suffix[0] is 'w' or 's' or 'h') && char.IsDigit(suffix[1]);
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}
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}
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