| | | 1 | | using System; |
| | | 2 | | |
| | | 3 | | namespace MediaBrowser.Providers.Manager; |
| | | 4 | | |
| | | 5 | | /// <summary> |
| | | 6 | | /// Helpers for comparing the language of fetched metadata with the language that was requested. |
| | | 7 | | /// </summary> |
| | | 8 | | internal static class MetadataLanguageUtils |
| | | 9 | | { |
| | | 10 | | /// <summary> |
| | | 11 | | /// Gets the language subtag of a language tag, e.g. "es" for "es-ES". |
| | | 12 | | /// </summary> |
| | | 13 | | /// <param name="language">The language tag.</param> |
| | | 14 | | /// <returns>The language subtag, lowercased, or <c>null</c> if none was given.</returns> |
| | | 15 | | public static string? GetLanguageSubtag(string? language) |
| | | 16 | | { |
| | 20 | 17 | | if (string.IsNullOrEmpty(language)) |
| | | 18 | | { |
| | 2 | 19 | | return null; |
| | | 20 | | } |
| | | 21 | | |
| | 18 | 22 | | var separator = language.IndexOf('-', StringComparison.Ordinal); |
| | | 23 | | |
| | 18 | 24 | | return (separator == -1 ? language : language[..separator]).ToLowerInvariant(); |
| | | 25 | | } |
| | | 26 | | |
| | | 27 | | /// <summary> |
| | | 28 | | /// Determines whether a provider result can be considered to be in the requested language. |
| | | 29 | | /// </summary> |
| | | 30 | | /// <param name="resultLanguage">The language the provider reported for its result, if any.</param> |
| | | 31 | | /// <param name="preferredLanguage">The language that was requested, if any.</param> |
| | | 32 | | /// <returns><c>true</c> if the result is in the requested language or either language is unknown.</returns> |
| | | 33 | | public static bool MatchesPreferredLanguage(string? resultLanguage, string? preferredLanguage) |
| | | 34 | | { |
| | | 35 | | // A provider that doesn't report a language cannot be judged, assume it honored the request |
| | 18 | 36 | | if (string.IsNullOrEmpty(resultLanguage) || string.IsNullOrEmpty(preferredLanguage)) |
| | | 37 | | { |
| | 11 | 38 | | return true; |
| | | 39 | | } |
| | | 40 | | |
| | | 41 | | // Compare on the language subtag only so that e.g. "es" matches "es-ES" |
| | 7 | 42 | | return string.Equals(GetLanguageSubtag(resultLanguage), GetLanguageSubtag(preferredLanguage), StringComparison.O |
| | | 43 | | } |
| | | 44 | | } |