1 files changed, 59 insertions, 51 deletions
diff --git a/MediaBrowser.Model/Globalization/ILocalizationManager.cs b/MediaBrowser.Model/Globalization/ILocalizationManager.cs
index 20deaa505..f6e65028e 100644
--- a/MediaBrowser.Model/Globalization/ILocalizationManager.cs
+++ b/MediaBrowser.Model/Globalization/ILocalizationManager.cs
@@ -1,65 +1,73 @@
 using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
 using MediaBrowser.Model.Entities;
 
-namespace MediaBrowser.Model.Globalization
+namespace MediaBrowser.Model.Globalization;
+
+/// <summary>
+/// Interface ILocalizationManager.
+/// </summary>
+public interface ILocalizationManager
 {
     /// <summary>
-    /// Interface ILocalizationManager.
+    /// Gets the cultures.
     /// </summary>
-    public interface ILocalizationManager
-    {
-        /// <summary>
-        /// Gets the cultures.
-        /// </summary>
-        /// <returns><see cref="IEnumerable{CultureDto}" />.</returns>
-        IEnumerable<CultureDto> GetCultures();
+    /// <returns><see cref="IEnumerable{CultureDto}" />.</returns>
+    IEnumerable<CultureDto> GetCultures();
 
-        /// <summary>
-        /// Gets the countries.
-        /// </summary>
-        /// <returns><see cref="IEnumerable{CountryInfo}" />.</returns>
-        IEnumerable<CountryInfo> GetCountries();
+    /// <summary>
+    /// Gets the countries.
+    /// </summary>
+    /// <returns><see cref="IReadOnlyList{CountryInfo}" />.</returns>
+    IReadOnlyList<CountryInfo> GetCountries();
 
-        /// <summary>
-        /// Gets the parental ratings.
-        /// </summary>
-        /// <returns><see cref="IEnumerable{ParentalRating}" />.</returns>
-        IEnumerable<ParentalRating> GetParentalRatings();
+    /// <summary>
+    /// Gets the parental ratings.
+    /// </summary>
+    /// <returns><see cref="IReadOnlyList{ParentalRating}" />.</returns>
+    IReadOnlyList<ParentalRating> GetParentalRatings();
 
-        /// <summary>
-        /// Gets the rating level.
-        /// </summary>
-        /// <param name="rating">The rating.</param>
-        /// <param name="countryCode">The optional two letter ISO language string.</param>
-        /// <returns><see cref="int" /> or <c>null</c>.</returns>
-        int? GetRatingLevel(string rating, string? countryCode = null);
+    /// <summary>
+    /// Gets the rating level.
+    /// </summary>
+    /// <param name="rating">The rating.</param>
+    /// <param name="countryCode">The optional two letter ISO language string.</param>
+    /// <returns><see cref="ParentalRatingScore" /> or <c>null</c>.</returns>
+    ParentalRatingScore? GetRatingScore(string rating, string? countryCode = null);
+
+    /// <summary>
+    /// Gets the localized string.
+    /// </summary>
+    /// <param name="phrase">The phrase.</param>
+    /// <param name="culture">The culture.</param>
+    /// <returns><see cref="string" />.</returns>
+    string GetLocalizedString(string phrase, string culture);
 
-        /// <summary>
-        /// Gets the localized string.
-        /// </summary>
-        /// <param name="phrase">The phrase.</param>
-        /// <param name="culture">The culture.</param>
-        /// <returns><see cref="string" />.</returns>
-        string GetLocalizedString(string phrase, string culture);
+    /// <summary>
+    /// Gets the localized string.
+    /// </summary>
+    /// <param name="phrase">The phrase.</param>
+    /// <returns>System.String.</returns>
+    string GetLocalizedString(string phrase);
 
-        /// <summary>
-        /// Gets the localized string.
-        /// </summary>
-        /// <param name="phrase">The phrase.</param>
-        /// <returns>System.String.</returns>
-        string GetLocalizedString(string phrase);
+    /// <summary>
+    /// Gets the localization options.
+    /// </summary>
+    /// <returns><see cref="IEnumerable{LocalizationOption}" />.</returns>
+    IEnumerable<LocalizationOption> GetLocalizationOptions();
 
-        /// <summary>
-        /// Gets the localization options.
-        /// </summary>
-        /// <returns><see cref="IEnumerable{LocalizationOption}" />.</returns>
-        IEnumerable<LocalizationOption> GetLocalizationOptions();
+    /// <summary>
+    /// Returns the correct <see cref="CultureDto" /> for the given language.
+    /// </summary>
+    /// <param name="language">The language.</param>
+    /// <returns>The correct <see cref="CultureDto" /> for the given language.</returns>
+    CultureDto? FindLanguageInfo(string language);
 
-        /// <summary>
-        /// Returns the correct <see cref="CultureDto" /> for the given language.
-        /// </summary>
-        /// <param name="language">The language.</param>
-        /// <returns>The correct <see cref="CultureDto" /> for the given language.</returns>
-        CultureDto? FindLanguageInfo(string language);
-    }
+    /// <summary>
+    /// Returns the language in ISO 639-2/T when the input is ISO 639-2/B.
+    /// </summary>
+    /// <param name="isoB">The language in ISO 639-2/B.</param>
+    /// <param name="isoT">The language in ISO 639-2/T.</param>
+    /// <returns>Whether the language could be converted.</returns>
+    public bool TryGetISO6392TFromB(string isoB, [NotNullWhen(true)] out string? isoT);
 }