inabox/InABox.Core/DigitalForms/Layouts/Fields/DFLayoutDateField/DFLayoutDateFieldProperties.cs

using Newtonsoft.Json.Linq;
using System;
using System.Globalization;

namespace InABox.Core
{
    public class DFLayoutDateFieldProperties : DFLayoutFieldProperties<DateTime, DateTime?>
    {
        public DFLayoutDateFieldProperties()
        {
            Format = "dd MMM yy";
        }

        public string Format { get; set; }

        public override string FormatValue(DateTime? value)
        {
            return string.Format("{0" + (string.IsNullOrWhiteSpace(Format) ? "" : ":" + Format.Replace(":", "\\:")) + "}", value);
        }

        public override DateTime GetValue(DateTime? value)
        {
            return value ?? Default;
        }

        public override void SerializeValue(DFSaveStorageEntry entry, DateTime? value)
        {
            if(value != null)
            {
                entry.SetValue(value.Value.ToString("dd-MM-yyyy"));
            }
        }

        public override DateTime? DeserializeValue(DFLoadStorageEntry entry)
        {
            var value = entry.GetValue();
            if (value is DateTime date)
                return date;
            if (DateTime.TryParseExact(value as string, "dd-MM-yyyy", CultureInfo.InvariantCulture, DateTimeStyles.None, out var result))
                return result;
            return null;
        }

        protected override void LoadProperties()
        {
            base.LoadProperties();
            Format = GetProperty("Format", Format);
        }

        protected override void SaveProperties()
        {
            base.SaveProperties();
            SetProperty("Format", Format);
        }
    }
}