using System;
using System.Data.SqlClient;

namespace DataModel.Helpers
{
    /// <summary>
    /// SQL server ADO helpers
    /// </summary>
    public static class SqlHelpers
    {
        /// <summary>
        /// Binds the parameter to the command
        /// </summary>
        /// <param name="command">Command to bind parameter to</param>
        /// <param name="parameterName">Name of parameter</param>
        /// <param name="parameterValue">Value of parameter</param>
        /// <returns>Bound parameter</returns>
        public static SqlParameter Bind(this SqlCommand command, string parameterName, object parameterValue)
        {
            return parameterValue != null
                ? command.Parameters.AddWithValue(parameterName, parameterValue)
                : command.Parameters.AddWithValue(parameterName, DBNull.Value);
        }

        /// <summary>
        /// Binds the parameter to the command
        /// </summary>
        /// <param name="command">Command to bind parameter to</param>
        /// <param name="parameterName">Name of parameter</param>
        /// <param name="parameterValue">Value of parameter</param>
        /// <returns>Bound parameter</returns>
        public static SqlParameter Bind(this SqlCommand command, string parameterName, string parameterValue)
        {
            return !string.IsNullOrEmpty(parameterValue) ? 
                command.Parameters.AddWithValue(parameterName, parameterValue) : 
                command.Parameters.AddWithValue(parameterName, DBNull.Value);
        }

        /// <summary>
        /// Binds the parameter to the command
        /// </summary>
        /// <param name="command">Command to bind parameter to</param>
        /// <param name="parameterName">Name of parameter</param>
        /// <param name="parameterValue">Value of parameter</param>
        /// <returns>Bound parameter</returns>
        public static SqlParameter Bind(this SqlCommand command, string parameterName, byte[] parameterValue)
        {
            return parameterValue != null ? 
                command.Parameters.AddWithValue(parameterName, parameterValue) : 
                command.Parameters.AddWithValue(parameterName, DBNull.Value);
        }
    }
}