using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Text.RegularExpressions;

namespace PointOfSales.Config
{
   public class UsableFunction
    {
        public void clearTxt(Control container)
        {
            try
            {
                //'for each txt as control in this(object).control
                foreach (Control txt in container.Controls)
                {
                    //conditioning the txt as control by getting it's type.
                    //the type of txt as control must be textbox.
                    if (txt is TextBox)
                    {
                        //if the object(textbox) is present. The result is, the textbox will be cleared.
                        txt.Text = "";
                    }
                    if (txt is RichTextBox)
                    {
                        txt.Text = "";
                    }
                }


            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

        //initialize the validating method
        static Regex Valid_Name = StringOnly();
        static Regex Valid_Contact = NumbersOnly();
        static Regex Valid_Password = ValidPassword();
        static Regex Valid_Email = Email_Address();



        //Method for validating email address
        private static Regex Email_Address()
        {
            string Email_Pattern = @"^(?!\.)(""([^""\r\\]|\\[""\r\\])*""|"
                + @"([-a-z0-9!#$%&'*+/=?^_`{|}~]|(?<!\.)\.)*)(?<!\.)"
                + @"@[a-z0-9][\w\.-]*[a-z0-9]\.[a-z][a-z\.]*[a-z]$";

            return new Regex(Email_Pattern, RegexOptions.IgnoreCase);
        }
        //Method for string validation only
        private static Regex StringOnly()
        {
            string StringAndNumber_Pattern = "^[a-zA-Z]";

            return new Regex(StringAndNumber_Pattern, RegexOptions.IgnoreCase);
        }
        //Method for numbers validation only
        private static Regex NumbersOnly()
        {
            string StringAndNumber_Pattern = "^[0-9]*$";

            return new Regex(StringAndNumber_Pattern, RegexOptions.IgnoreCase);
        }
        //Method for password validation only
        private static Regex ValidPassword()
        {
            string Password_Pattern = "(?!^[0-9]*$)(?!^[a-zA-Z]*$)^([a-zA-Z0-9]{8,15})$";

            return new Regex(Password_Pattern, RegexOptions.IgnoreCase);
        }
    }
}
