Spaces:
Runtime error
Runtime error
| using System.Text; | |
| namespace TaskTrackingSystem.Shared.Localization; | |
| public enum DetectedContentLanguage | |
| { | |
| Empty, | |
| Burmese, | |
| English, | |
| Mixed, | |
| Unknown | |
| } | |
| public sealed record LanguageDetectionResult( | |
| DetectedContentLanguage Language, | |
| int BurmeseCharacters, | |
| int LatinCharacters, | |
| int OtherCharacters, | |
| double BurmeseRatio, | |
| double EnglishRatio); | |
| /// <summary> | |
| /// Local, advisory detection used only to help users move content between fields. | |
| /// It deliberately does not reject mixed-language business text. | |
| /// </summary> | |
| public sealed class LanguageDetectionService | |
| { | |
| public LanguageDetectionResult Detect(string? text) | |
| { | |
| if (string.IsNullOrWhiteSpace(text)) | |
| { | |
| return new(DetectedContentLanguage.Empty, 0, 0, 0, 0, 0); | |
| } | |
| var burmese = 0; | |
| var latin = 0; | |
| var other = 0; | |
| foreach (var rune in text.EnumerateRunes()) | |
| { | |
| if (IsBurmese(rune.Value)) | |
| { | |
| burmese++; | |
| } | |
| else if ((rune.Value >= 'A' && rune.Value <= 'Z') || (rune.Value >= 'a' && rune.Value <= 'z')) | |
| { | |
| latin++; | |
| } | |
| else if (!Rune.IsWhiteSpace(rune) && !Rune.IsPunctuation(rune) && !Rune.IsNumber(rune) && !Rune.IsSymbol(rune)) | |
| { | |
| other++; | |
| } | |
| } | |
| var letters = burmese + latin + other; | |
| if (letters == 0) | |
| { | |
| return new(DetectedContentLanguage.Unknown, burmese, latin, other, 0, 0); | |
| } | |
| var burmeseRatio = burmese / (double)letters; | |
| var englishRatio = latin / (double)letters; | |
| var language = burmeseRatio >= 0.70 && burmese > 0 | |
| ? DetectedContentLanguage.Burmese | |
| : englishRatio >= 0.70 && latin > 0 | |
| ? DetectedContentLanguage.English | |
| : burmese > 0 && latin > 0 | |
| ? DetectedContentLanguage.Mixed | |
| : DetectedContentLanguage.Unknown; | |
| return new(language, burmese, latin, other, burmeseRatio, englishRatio); | |
| } | |
| public bool AppearsPredominantlyBurmese(string? text) => Detect(text).Language == DetectedContentLanguage.Burmese; | |
| public bool AppearsPredominantlyEnglish(string? text) => Detect(text).Language == DetectedContentLanguage.English; | |
| private static bool IsBurmese(int value) => | |
| (value >= 0x1000 && value <= 0x109F) || | |
| (value >= 0xAA60 && value <= 0xAA7F) || | |
| (value >= 0xA9E0 && value <= 0xA9FF); | |
| } | |