using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Controls;

namespace Tango.MachineStudio.Common.ValidationRules
{
    /// <summary>
    /// Represents a required field validation rule.
    /// </summary>
    /// <seealso cref="System.Windows.Controls.ValidationRule" />
    public class Required : ValidationRule
    {
        /// <summary>
        /// When overridden in a derived class, performs validation checks on a value.
        /// </summary>
        /// <param name="value">The value from the binding target to check.</param>
        /// <param name="cultureInfo">The culture to use in this rule.</param>
        /// <returns>
        /// A <see cref="T:System.Windows.Controls.ValidationResult" /> object.
        /// </returns>
        public override ValidationResult Validate(object value, CultureInfo cultureInfo)
        {
            return new ValidationResult(!String.IsNullOrWhiteSpace(value.ToStringSafe()), "Required");
        }
    }
}