103 lines
4.2 KiB
C#
103 lines
4.2 KiB
C#
using System.Text;
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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(MetadataSettings metadataSettings, string fileNameFirstSegment)
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{
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bool result;
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if (fileNameFirstSegment.Length < 5 || fileNameFirstSegment.Length > metadataSettings.IntMinValueLength)
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result = false;
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else
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{
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bool skipOneAllAreNumbers = fileNameFirstSegment[1..].All(char.IsNumber);
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result = (skipOneAllAreNumbers && fileNameFirstSegment[0] == '-') || (skipOneAllAreNumbers && char.IsNumber(fileNameFirstSegment[0]));
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}
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return result;
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}
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internal static int GetId(ResultSettings resultSettings, MetadataSettings metadataSettings, string intelligentId)
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{
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int result;
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StringBuilder results = new();
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if (metadataSettings.IntMinValueLength < (resultSettings.ResultAllInOneSubdirectoryLength + 2))
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throw new NotSupportedException();
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for (int i = intelligentId.Length - (resultSettings.ResultAllInOneSubdirectoryLength + 2); i > -1; i--)
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_ = results.Append(intelligentId[i]);
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_ = results.Append(intelligentId[^3]).Append(intelligentId[^2]);
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result = int.Parse(results.ToString());
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if (intelligentId[^1] is '1' or '2')
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result *= -1;
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else if (intelligentId[^1] is not '9' and not '8')
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throw new NotSupportedException();
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return result;
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}
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#pragma warning disable IDE0060
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internal static string GetIntelligentId(ResultSettings resultSettings, MetadataSettings metadataSettings, long id, bool? hasIgnoreKeyword, bool? hasDateTimeOriginal)
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#pragma warning restore IDE0060
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{
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string result;
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StringBuilder stringBuilder = new();
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if (metadataSettings.IntMinValueLength < (resultSettings.ResultAllInOneSubdirectoryLength + 2))
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throw new NotSupportedException();
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int key;
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string value;
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List<char> resultAllInOneSubdirectoryChars = [];
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if (id > -1)
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{
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key = hasIgnoreKeyword is not null && hasIgnoreKeyword.Value ? 8 : 9;
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value = id.ToString().PadLeft(metadataSettings.IntMinValueLength, '0');
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}
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else
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{
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key = hasIgnoreKeyword is not null && hasIgnoreKeyword.Value ? 2 : 1;
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value = id.ToString()[1..].PadLeft(metadataSettings.IntMinValueLength, '0');
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}
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for (int i = value.Length - resultSettings.ResultAllInOneSubdirectoryLength - 1; i > -1; i--)
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_ = stringBuilder.Append(value[i]);
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for (int i = value.Length - resultSettings.ResultAllInOneSubdirectoryLength; i < value.Length; i++)
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resultAllInOneSubdirectoryChars.Add(value[i]);
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result = $"{stringBuilder}{string.Join(string.Empty, resultAllInOneSubdirectoryChars)}{key}";
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return result;
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}
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internal static string GetPaddedId(ResultSettings resultSettings, MetadataSettings metadataSettings, int id, bool? hasIgnoreKeyword, bool? hasDateTimeOriginal, int? index)
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{
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string result;
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if (metadataSettings.Offset < 0)
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result = Guid.NewGuid().ToString();
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else
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{
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string intelligentId = GetIntelligentId(resultSettings, metadataSettings, id, hasIgnoreKeyword, hasDateTimeOriginal);
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int check = GetId(resultSettings, metadataSettings, intelligentId);
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if (check != id)
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throw new NotSupportedException();
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result = index is null || metadataSettings.Offset == IId.DeterministicHashCode ? intelligentId : $"{metadataSettings.Offset + index}{intelligentId}";
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}
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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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} |