95 lines
3.8 KiB
C#
95 lines
3.8 KiB
C#
using View_by_Distance.Shared.Models.Stateless.Methods;
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namespace View_by_Distance.Shared.Models.Stateless;
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internal abstract class Id
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{
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internal static bool NameWithoutExtensionIsIdFormat(string fileNameWithoutExtension)
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{
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bool result;
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int intMinValueLength = int.MinValue.ToString().Length;
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if (fileNameWithoutExtension.Length < 5 || fileNameWithoutExtension.Length > intMinValueLength)
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result = false;
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else
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{
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bool skipOneAllAreNumbers = fileNameWithoutExtension[1..].All(l => char.IsNumber(l));
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result = (skipOneAllAreNumbers && fileNameWithoutExtension[0] == '-') || (skipOneAllAreNumbers && char.IsNumber(fileNameWithoutExtension[0]));
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}
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return result;
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}
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internal static FilePath GetFilePath(FilePath filePath, string file)
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{
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FilePath result;
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string fileName = Path.GetFileName(file);
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string fileExtensionLowered = Path.GetExtension(file).ToLower();
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result = new(filePath.DirectoryName, fileExtensionLowered, file, filePath.Id, filePath.IsIdFormat, filePath.IsPaddedIdFormat, fileName, filePath.NameWithoutExtension);
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return result;
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}
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internal static FilePath GetFilePath(MetadataConfiguration metadataConfiguration, string file)
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{
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FilePath result;
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int? id;
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short? multiplier;
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char negativeMarker;
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int absoluteValueOfId;
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string fileName = Path.GetFileName(file);
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string fileExtensionLowered = Path.GetExtension(file).ToLower();
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string fileNameWithoutExtension = Path.GetFileNameWithoutExtension(file);
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string fileDirectoryName = Path.GetDirectoryName(file) ?? throw new NullReferenceException();
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short sortOrderOnlyLengthIndex = IId.GetSortOrderOnlyLengthIndex(metadataConfiguration.Offset);
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bool nameWithoutExtensionIsIdFormat = IId.NameWithoutExtensionIsIdFormat(fileNameWithoutExtension);
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bool nameWithoutExtensionIsPaddedIdFormat = IId.NameWithoutExtensionIsPaddedIdFormat(fileNameWithoutExtension, sortOrderOnlyLengthIndex);
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if (!nameWithoutExtensionIsIdFormat && !nameWithoutExtensionIsPaddedIdFormat)
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id = null;
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else if (nameWithoutExtensionIsIdFormat)
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{
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if (!int.TryParse(fileNameWithoutExtension, out absoluteValueOfId))
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id = null;
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else
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id = absoluteValueOfId;
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}
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else
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{
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negativeMarker = fileNameWithoutExtension[sortOrderOnlyLengthIndex - 2];
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if (negativeMarker == '7')
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multiplier = 1;
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else if (negativeMarker == '3')
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multiplier = -1;
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else
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multiplier = null;
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if (!int.TryParse(fileNameWithoutExtension[sortOrderOnlyLengthIndex..], out absoluteValueOfId))
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id = null;
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else
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{
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id = absoluteValueOfId * multiplier;
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if (id is null || !fileNameWithoutExtension.EndsWith(id.Value.ToString()[1..]))
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id = null;
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}
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}
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result = new(fileDirectoryName, fileExtensionLowered, file, id, nameWithoutExtensionIsIdFormat, nameWithoutExtensionIsPaddedIdFormat, fileName, fileNameWithoutExtension);
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return result;
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}
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internal static int GetDeterministicHashCode(byte[] value)
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{
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int result;
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unchecked
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{
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int hash1 = (5381 << 16) + 5381;
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int hash2 = hash1;
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for (int i = 0; i < value.Length; i += 2)
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{
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hash1 = ((hash1 << 5) + hash1) ^ value[i];
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if (i == value.Length - 1)
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break;
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hash2 = ((hash2 << 5) + hash2) ^ value[i + 1];
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}
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result = hash1 + (hash2 * 1566083941);
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}
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return result;
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}
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} |