Implemented MongoDb Basics

Services/DbInitializer.cs

@@ -1,28 +1,48 @@
 using JsonFlatFileDataStore;
+using MongoDB.Driver;
 using mstdnCats.Models;
 
 namespace mstdnCats.Services
 {
     public class DbInitializer
     {
-        public static Task<IDocumentCollection<Post>> SetupDb(string _dbname)
+        public static Task<IDocumentCollection<Post>> SetupJsonDb(string _dbname)
         {
             // Setup DB
             IDocumentCollection<Post>? collection = null;
 
-                try
-                {
-                    // Initialize DB
-                    var store = new DataStore($"{_dbname}.json", minifyJson: true);
-                    collection = store.GetCollection<Post>();
-                }
-                catch
-                {
-                    return Task.FromResult<IDocumentCollection<Post>>(null);
-                }
+            try
+            {
+                // Initialize Backup DB
+                var store = new DataStore($"{_dbname + "_BK"}.json", minifyJson: true);
+                collection = store.GetCollection<Post>();
+            }
+            catch
+            {
+                return Task.FromResult<IDocumentCollection<Post>>(null);
+            }
 
-                // Return collection
-                return Task.FromResult(collection);
+            // Return collection
+            return Task.FromResult(collection);
+        }
+
+        public static Task<IMongoDatabase> SetupDb(string mongoDbConnectionString, string dbName)
+        {
+            if (mongoDbConnectionString == null)
+            {
+                throw new Exception("MongoDb connection string is null");
+            }
+
+            try
+            {
+                var client = new MongoClient(mongoDbConnectionString);
+                var database = client.GetDatabase(dbName);
+                return Task.FromResult(database);
+            }
+            catch (Exception ex)
+            {
+                throw new Exception("Error while connecting to MongoDB: " + ex.Message);
+            }
         }
     }
 }