using System;
using Microsoft.AspNetCore.Http;

namespace GDZZ.Core;

/// <summary>
/// 验证扩展类
/// </summary>
public static partial class Extensions
{
    /// <summary>
    /// 检查 Object 是否为 NULL
    /// </summary>
    /// <param name="value"></param>
    /// <returns></returns>
    public static bool IsEmpty(this object value)
    {
        return value == null || string.IsNullOrEmpty(value.ParseToString());
    }

    /// <summary>
    /// 检查 Object 是否为 NULL 或者 0
    /// </summary>
    /// <param name="value"></param>
    /// <returns></returns>
    public static bool IsNullOrZero(this object value)
    {
        return value == null || value.ParseToString().Trim() == "0";
    }

    /// <summary>
    /// 检查是否为 AJAX 请求
    /// </summary>
    /// <param name="request"></param>
    /// <returns></returns>
    public static bool IsAjaxRequest(this HttpRequest request)
    {
        if (request == null)
            throw new ArgumentNullException(nameof(request));

        if (request.Headers != null)
            return request.Headers["X-Requested-With"] == "XMLHttpRequest";
        return false;
    }
}