109 lines
4.4 KiB
C#
109 lines
4.4 KiB
C#
using MetadataExtractor;
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using MetadataExtractor.Formats.Avi;
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using MetadataExtractor.Formats.Exif;
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using MetadataExtractor.Formats.QuickTime;
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using View_by_Distance.Shared.Models.Stateless;
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namespace View_by_Distance.Metadata.Models.Stateless.Methods;
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internal class Metadata
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{
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internal static string? GetFaceEncoding(IReadOnlyList<MetadataExtractor.Directory> directories)
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{
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string? result;
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List<string> results = new();
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const string comment = "Comment: ";
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foreach (MetadataExtractor.Directory directory in directories)
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{
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if (directory.Name != "PNG-tEXt")
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continue;
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foreach (Tag tag in directory.Tags)
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{
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if (tag.Name != "Textual Data" || string.IsNullOrEmpty(tag.Description))
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continue;
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if (!tag.Description.StartsWith(comment))
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continue;
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results.Add(tag.Description);
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}
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}
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result = results.Any() ? results[0][comment.Length..] : null;
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return result;
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}
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internal static string? GetOutputResolution(IReadOnlyList<MetadataExtractor.Directory> directories)
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{
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string? result;
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List<string> results = new();
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const string artist = "Artist: ";
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foreach (MetadataExtractor.Directory directory in directories)
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{
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if (directory.Name != "PNG-tEXt")
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continue;
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foreach (Tag tag in directory.Tags)
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{
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if (tag.Name != "Textual Data" || string.IsNullOrEmpty(tag.Description))
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continue;
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if (!tag.Description.StartsWith(artist))
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continue;
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results.Add(tag.Description);
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}
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}
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result = results.Any() ? results[0][artist.Length..] : null;
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return result;
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}
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internal static DateTime GetMinimumDateTime(DateTime?[] dateTimes, int year, IReadOnlyList<MetadataExtractor.Directory> directories)
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{
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DateTime result;
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DateTime dateTime;
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List<DateTime> results = (from l in dateTimes where l is not null select l.Value).ToList();
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ExifSubIfdDirectory? exifSubIfdDirectory = directories.OfType<ExifSubIfdDirectory>().FirstOrDefault();
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if (exifSubIfdDirectory is not null)
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{
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if (exifSubIfdDirectory.TryGetDateTime(ExifDirectoryBase.TagDateTime, out dateTime))
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results.Add(dateTime);
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if (exifSubIfdDirectory.TryGetDateTime(ExifDirectoryBase.TagDateTimeDigitized, out dateTime))
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results.Add(dateTime);
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if (exifSubIfdDirectory.TryGetDateTime(ExifDirectoryBase.TagDateTimeOriginal, out dateTime))
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results.Add(dateTime);
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}
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AviDirectory? aviDirectory = directories.OfType<AviDirectory>().FirstOrDefault();
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if (aviDirectory is not null)
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{
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if (aviDirectory.TryGetDateTime(AviDirectory.TagDateTimeOriginal, out dateTime))
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results.Add(dateTime);
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}
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QuickTimeMovieHeaderDirectory? quickTimeMovieHeaderDirectory = directories.OfType<QuickTimeMovieHeaderDirectory>().FirstOrDefault();
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if (quickTimeMovieHeaderDirectory is not null)
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{
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if (quickTimeMovieHeaderDirectory.TryGetDateTime(QuickTimeMovieHeaderDirectory.TagCreated, out dateTime))
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results.Add(dateTime);
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}
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QuickTimeTrackHeaderDirectory? quickTimeTrackHeaderDirectory = directories.OfType<QuickTimeTrackHeaderDirectory>().FirstOrDefault();
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if (quickTimeTrackHeaderDirectory is not null)
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{
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if (quickTimeTrackHeaderDirectory.TryGetDateTime(QuickTimeTrackHeaderDirectory.TagCreated, out dateTime))
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results.Add(dateTime);
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}
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DateTime[] filtered = (from l in results where l.Year >= year select l).ToArray();
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if (!filtered.Any())
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result = results.Min();
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else
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result = filtered.Min();
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return result;
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}
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internal static int GetOrientation(List<KeyValuePair<string, string>> metadataCollection)
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{
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int result;
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const string orientation = nameof(IExif.Tags.Orientation);
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List<string> orientations = (from l in metadataCollection where l.Key.Contains(orientation) select l.Value).ToList();
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if (!orientations.Any())
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result = 0;
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else if (!int.TryParse(orientations[0], out result))
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result = 0;
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return result;
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}
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} |