using System;
using System.Web.Mvc;

namespace Neo.Legitimate.Web.FrameworkExtensions
{
    /// <summary>
    /// Custom decimal binder.
    ///   Add the following to Global.Asax
    ///     ModelBinders.Binders.Add(typeof(decimal), new DecimalModelBinder());
    ///     ModelBinders.Binders.Add(typeof(decimal?), new DecimalModelBinder());
    /// </summary>
    public class DecimalModelBinder : DefaultModelBinder
    {
        #region Implementation of IModelBinder

        public override object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
        {
            var valueProviderResult = bindingContext.ValueProvider.GetValue(bindingContext.ModelName);

            if(valueProviderResult.AttemptedValue.Equals("N.aN") ||
                valueProviderResult.AttemptedValue.Equals("NaN") ||
                valueProviderResult.AttemptedValue.Equals("Infini.ty") ||
                valueProviderResult.AttemptedValue.Equals("Infinity") ||
                string.IsNullOrEmpty(valueProviderResult.AttemptedValue))
                return 0m;

            return valueProviderResult == null ? base.BindModel(controllerContext, bindingContext) : Convert.ToDecimal(valueProviderResult.AttemptedValue);
        }

        #endregion
    }

}