Add language repository & controller

Oqtane.Server/Repository/LanguageRepository.cs

@@ -0,0 +1,35 @@
+using System.Collections.Generic;
+using System.Linq;
+using Oqtane.Models;
+
+namespace Oqtane.Repository
+{
+    public class LanguageRepository : ILanguageRepository
+    {
+        private TenantDBContext _db;
+
+        public LanguageRepository(TenantDBContext context)
+        {
+            _db = context;
+        }
+            
+        public IEnumerable<Language> GetLanguages(int siteId) => _db.Languages.Where(l => l.SiteId == siteId);
+
+        public Language AddLanguage(Language language)
+        {
+            _db.Languages.Add(language);
+            _db.SaveChanges();
+
+            return language;
+        }
+
+        public Language GetLanguage(int languageId) => _db.Languages.Find(languageId);
+
+        public void DeleteLanguage(int languageId)
+        {
+            var language = _db.Languages.Find(languageId);
+            _db.Languages.Remove(language);
+            _db.SaveChanges();
+        }
+    }
+}