consolidate Service interface and implementation classes

Oqtane.Client/Services/LanguageService.cs

@@ -7,6 +7,55 @@ using Oqtane.Shared;
 
 namespace Oqtane.Services
 {
+    /// <summary>
+    /// Service to manage <see cref="Language"/> entries
+    /// </summary>
+    public interface ILanguageService
+    {
+        /// <summary>
+        /// Returns a list of all available languages for the given <see cref="Site"/> 
+        /// </summary>
+        /// <param name="siteId"></param>
+        /// <returns></returns>
+        Task<List<Language>> GetLanguagesAsync(int siteId);
+
+        /// <summary>
+        /// Returns a list of all available languages for the given <see cref="Site" /> and package
+        /// </summary>
+        /// <param name="siteId"></param>
+        /// <param name="packageName"></param>
+        /// <returns></returns>
+        Task<List<Language>> GetLanguagesAsync(int siteId, string packageName);
+
+        /// <summary>
+        /// Returns the given language
+        /// </summary>
+        /// <param name="languageId"></param>
+        /// <returns></returns>
+        Task<Language> GetLanguageAsync(int languageId);
+
+        /// <summary>
+        /// Adds the given language
+        /// </summary>
+        /// <param name="language"></param>
+        /// <returns></returns>
+        Task<Language> AddLanguageAsync(Language language);
+
+        /// <summary>
+        /// Edits the given language
+        /// </summary>
+        /// <param name="language"></param>
+        /// <returns></returns>
+        Task EditLanguageAsync(Language language);
+
+        /// <summary>
+        /// Deletes the given language
+        /// </summary>
+        /// <param name="languageId"></param>
+        /// <returns></returns>
+        Task DeleteLanguageAsync(int languageId);
+    }
+
     [PrivateApi("Don't show in the documentation, as everything should use the Interface")]
     public class LanguageService : ServiceBase, ILanguageService
     {