CROWLER/Services/SqlServerConnectionFactory.cs

using CRAWLER.Configuration;
using Microsoft.Data.SqlClient;
using Microsoft.Extensions.Configuration;

namespace CRAWLER.Services;

internal interface IDatabaseConnectionFactory
{
    SqlConnection CreateConnection();
    SqlConnection CreateMasterConnection();
    DatabaseOptions Options { get; }
}

internal sealed class SqlServerConnectionFactory : IDatabaseConnectionFactory
{
    public SqlServerConnectionFactory(IConfiguration configuration)
    {
        Options = configuration.GetSection("Database").Get<DatabaseOptions>()
                  ?? throw new InvalidOperationException("Раздел Database не найден в appsettings.json.");
    }

    public DatabaseOptions Options { get; }

    public SqlConnection CreateConnection()
    {
        return new SqlConnection(BuildConnectionString(Options.Database));
    }

    public SqlConnection CreateMasterConnection()
    {
        return new SqlConnection(BuildConnectionString("master"));
    }

    private string BuildConnectionString(string databaseName)
    {
        var builder = new SqlConnectionStringBuilder
        {
            ApplicationName = Options.ApplicationName,
            DataSource = Options.Server,
            InitialCatalog = databaseName,
            ConnectTimeout = Options.ConnectTimeoutSeconds,
            Encrypt = Options.Encrypt,
            IntegratedSecurity = Options.IntegratedSecurity,
            MultipleActiveResultSets = Options.MultipleActiveResultSets,
            Pooling = Options.Pooling,
            MaxPoolSize = Options.MaxPoolSize,
            MinPoolSize = Options.MinPoolSize,
            TrustServerCertificate = Options.TrustServerCertificate,
            ConnectRetryCount = Options.ConnectRetryCount,
            ConnectRetryInterval = Options.ConnectRetryIntervalSeconds
        };

        return builder.ConnectionString;
    }
}