using System;
using System.Linq;
using System.Linq.Expressions;

namespace Gestor.Application.Helpers;

public static class QueryableHelper
{
	public static IOrderedQueryable<T> OrderBy<T>(this IQueryable<T> source, string propertyName)
	{
		return source.OrderBy(ToLambda<T>(propertyName));
	}

	public static IOrderedQueryable<T> OrderByDescending<T>(this IQueryable<T> source, string propertyName)
	{
		return source.OrderByDescending(ToLambda<T>(propertyName));
	}

	private static Expression<Func<T, object>> ToLambda<T>(string propertyName)
	{
		ParameterExpression parameterExpression = Expression.Parameter(typeof(T));
		return Expression.Lambda<Func<T, object>>(Expression.Convert(Expression.Property(parameterExpression, propertyName), typeof(object)), new ParameterExpression[1] { parameterExpression });
	}
}