src/Datory/DatabaseImpl/MySqlImpl.cs

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using System;
using System.Collections.Generic;
using System.Data.Common;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Threading.Tasks;
using Dapper;
using MySql.Data.MySqlClient;
using SqlKata.Compilers;
using Datory.Utils;

[assembly: InternalsVisibleTo("Datory.Tests")]

namespace Datory.DatabaseImpl
{
    internal class MySqlImpl : IDatabaseImpl
    {
        private static IDatabaseImpl _instance;
        public static IDatabaseImpl Instance
        {
            get
            {
                if (_instance != null) return _instance;
                _instance = new MySqlImpl();
                return _instance;
            }
        }

        public DbConnection GetConnection(string connectionString)
        {
            return new MySqlConnection(connectionString);
        }

        public Compiler GetCompiler(string connectionString)
        {
            return new MySqlCompiler();
        }

        public bool IsUseLegacyPagination(string connectionString)
        {
            return false;
        }

        public async Task<List<string>> GetDatabaseNamesAsync(string connectionString)
        {
            var databaseNames = new List<string>();

            using (var connection = GetConnection(connectionString))
            {
                using var rdr = await connection.ExecuteReaderAsync("show databases");
                while (rdr.Read())
                {
                    var dbName = rdr.GetString(0);
                    if (dbName == null) continue;
                    if (dbName != "information_schema" &&
                        dbName != "mysql" &&
                        dbName != "performance_schema" &&
                        dbName != "sakila" &&
                        dbName != "sys" &&
                        dbName != "world")