Initial commit carried over from private repo. This is V2.

code/MessengerApi/Factories/DbContextFactory.cs

@@ -0,0 +1,34 @@
+using MessengerApi.Configuration.Model;
+using MessengerApi.Configuration.Model.Persistence;
+using MessengerApi.Contracts.Factories;
+using MessengerApi.Db;
+using MessengerApi.Db.Npg;
+using MessengerApi.Db.Sql;
+using Microsoft.EntityFrameworkCore;
+
+namespace MessengerApi.Factories
+{
+    public class DbContextFactory : IDbContextFactory, IDbContextFactory<MessengerDbContext>
+    {
+        private readonly MessengerConfiguration configuration;
+
+        public DbContextFactory(MessengerConfiguration configuration)
+        {
+            this.configuration = configuration;
+        }
+
+        public MessengerDbContext CreateDbContext()
+        {
+            if (this.configuration.PersistenceConfiguration.PersistenceType == Configuration.Enums.PersistenceTypes.Sql)
+            {
+                return new MessengerSqlDbContext((configuration.PersistenceConfiguration as SqlPersistenceConfiguration).ConnectionString);
+            }
+            else if (this.configuration.PersistenceConfiguration.PersistenceType == Configuration.Enums.PersistenceTypes.PostgreSql)
+            {
+                return new MessengerNpgDbContext((configuration.PersistenceConfiguration as NpgPersistenceConfiguration).ConnectionString);
+            }
+
+            throw new NotImplementedException();
+        }
+    }
+}