messengerapi/code/MessengerApi/Factories/DbContextFactory.cs

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();
        }
    }
}