gwms/GWMS.Data/DbAdmin.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.EntityFrameworkCore;

namespace GWMS.Data
{
    public class DbAdmin : IDisposable
    {
        #region Private Fields

        private AdminContext adbCtx;

        #endregion Private Fields

        #region Public Fields

        /// <summary>
        /// Singleton gestione
        /// </summary>
        public static DbAdmin man = new DbAdmin();

        #endregion Public Fields

        #region Public Constructors

        public DbAdmin()
        {
            // Initialize database context for ADMIN
            adbCtx = new AdminContext();
        }

        #endregion Public Constructors

        #region Public Methods

        public bool checkCreateUser(string username, string pwd)
        {
            bool answ = false;
            // ricerca utente...
            var numUser = adbCtx
                .UserList
                .Where(x => x.User == username)
                .ToList()
                .Count;
            if (numUser > 0)
            {
                answ = true;
            }
            if (!answ)
            {
                // creo utente
                string sqlCommand = "FLUSH PRIVILEGES;";
                adbCtx.Database.ExecuteSqlRaw(sqlCommand);
                sqlCommand = $"CREATE USER '{username}'@'localhost' IDENTIFIED BY '{pwd}';";
                adbCtx.Database.ExecuteSqlRaw(sqlCommand);
                sqlCommand = $"GRANT ALL ON *.* TO '{username}'@'localhost';";
                adbCtx.Database.ExecuteSqlRaw(sqlCommand);
                sqlCommand = "FLUSH PRIVILEGES;";
                adbCtx.Database.ExecuteSqlRaw(sqlCommand);
            }
            return answ;
        }

        public void Dispose()
        {
            // Clear database context
            adbCtx.Dispose();
        }

        #endregion Public Methods
    }
}