Added GetSupportedCultures to IAbpStringLocalizer

framework/src/Volo.Abp.AspNetCore.Mvc.Client.Common/Volo/Abp/AspNetCore/Mvc/Client/RemoteLocalizationContributor.cs

@@ -1,4 +1,5 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Localization;
 using Microsoft.Extensions.Logging;
@@ -52,6 +53,13 @@ public class RemoteLocalizationContributor : ILocalizationResourceContributor
         }
     }
 
+    public IEnumerable<string> GetSupportedCultures()
+    {
+        /* This contributor does not know all the supported cultures by the
+         remote localization resource, and it is not needed on the client side */
+        return Array.Empty<string>();
+    }
+
     private Dictionary<string, string> GetResourceOrNull()
     {
         var applicationConfigurationDto = _applicationConfigurationClient.Get();

framework/src/Volo.Abp.Localization/Volo/Abp/Localization/AbpDictionaryBasedStringLocalizer.cs

@@ -47,6 +47,11 @@ public class AbpDictionaryBasedStringLocalizer : IAbpStringLocalizer
         );
     }
 
+    public IEnumerable<string> GetSupportedCultures()
+    {
+        return Resource.Contributors.GetSupportedCultures();
+    }
+
     protected virtual LocalizedString GetLocalizedStringFormatted(string name, params object[] arguments)
     {
         return GetLocalizedStringFormatted(name, CultureInfo.CurrentUICulture.Name, arguments);
@@ -208,5 +213,10 @@ public class AbpDictionaryBasedStringLocalizer : IAbpStringLocalizer
         {
             return _innerLocalizer.GetAllStrings(_cultureName, includeParentCultures, includeBaseLocalizers);
         }
+
+        public IEnumerable<string> GetSupportedCultures()
+        {
+            return _innerLocalizer.GetSupportedCultures();
+        }
     }
 }

framework/src/Volo.Abp.Localization/Volo/Abp/Localization/AbpStringLocalizerExtensions.cs

@@ -1,4 +1,5 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
 using System.Reflection;
 using JetBrains.Annotations;
 using Microsoft.Extensions.Localization;
@@ -41,10 +42,10 @@ public static class AbpStringLocalizerExtensions
         bool includeParentCultures,
         bool includeBaseLocalizers)
     {
-        var internalLocalizer = (ProxyHelper.UnProxy(stringLocalizer) as IStringLocalizer).GetInternalLocalizer();
-        if (internalLocalizer is IAbpStringLocalizer stringLocalizerSupportsInheritance)
+        var internalLocalizer = ((IStringLocalizer)ProxyHelper.UnProxy(stringLocalizer)).GetInternalLocalizer();
+        if (internalLocalizer is IAbpStringLocalizer abpStringLocalizer)
         {
-            return stringLocalizerSupportsInheritance.GetAllStrings(
+            return abpStringLocalizer.GetAllStrings(
                 includeParentCultures,
                 includeBaseLocalizers
             );
@@ -54,4 +55,15 @@ public static class AbpStringLocalizerExtensions
             includeParentCultures
         );
     }
+
+    public static IEnumerable<string> GetSupportedCultures(this IStringLocalizer localizer)
+    {
+        var internalLocalizer = ((IStringLocalizer)ProxyHelper.UnProxy(localizer)).GetInternalLocalizer();
+        if (internalLocalizer is IAbpStringLocalizer abpStringLocalizer)
+        {
+            return abpStringLocalizer.GetSupportedCultures();
+        }
+
+        return Array.Empty<string>();
+    }
 }

framework/src/Volo.Abp.Localization/Volo/Abp/Localization/IAbpStringLocalizer.cs

@@ -9,4 +9,6 @@ public interface IAbpStringLocalizer : IStringLocalizer
         bool includeParentCultures,
         bool includeBaseLocalizers
     );
-}
+
+    IEnumerable<string> GetSupportedCultures();
+}

framework/src/Volo.Abp.Localization/Volo/Abp/Localization/ILocalizationResourceContributor.cs

@@ -10,4 +10,6 @@ public interface ILocalizationResourceContributor
     LocalizedString GetOrNull(string cultureName, string name);
 
     void Fill(string cultureName, Dictionary<string, LocalizedString> dictionary);
+    
+    IEnumerable<string> GetSupportedCultures();
 }

framework/src/Volo.Abp.Localization/Volo/Abp/Localization/LocalizationResourceBase.cs

@@ -32,4 +32,9 @@ public abstract class LocalizationResourceBase
             Contributors.Add(initialContributor);
         }
     }
+
+    internal IEnumerable<string> GetSupportedCultures()
+    {
+        return Contributors.GetSupportedCultures();
+    }
 }

framework/src/Volo.Abp.Localization/Volo/Abp/Localization/LocalizationResourceContributorList.cs

@@ -27,4 +27,9 @@ public class LocalizationResourceContributorList : List<ILocalizationResourceCon
             contributor.Fill(cultureName, dictionary);
         }
     }
+
+    internal IEnumerable<string> GetSupportedCultures()
+    {
+        return this.SelectMany(c => c.GetSupportedCultures()).Distinct();
+    }
 }

framework/src/Volo.Abp.Localization/Volo/Abp/Localization/VirtualFiles/VirtualFileLocalizationResourceContributorBase.cs

@@ -37,6 +37,11 @@ public abstract class VirtualFileLocalizationResourceContributorBase : ILocaliza
         GetDictionaries().GetOrDefault(cultureName)?.Fill(dictionary);
     }
 
+    public IEnumerable<string> GetSupportedCultures()
+    {
+        return GetDictionaries().Keys;
+    }
+
     private Dictionary<string, ILocalizationDictionary> GetDictionaries()
     {
         var dictionaries = _dictionaries;