AiDOPWarehouse/Admin.NET/Admin.NET.Core/Extension/ObjectExtension.cs

namespace Admin.NET.Core;

/// <summary>
/// 对象拓展类
/// </summary>
[SuppressSniffer]
public static class ObjectExtension
{
    /// <summary>
    /// 获取实体排序
    /// </summary>
    /// <param name="type">排序类型</param>
    /// <returns>int</returns>
    public static int GetSqlSugarEntityOrder(this Type type)
    {
        return !type.IsDefined(typeof(SqlSugarEntityAttribute), true) ? 0 : type.GetCustomAttribute<SqlSugarEntityAttribute>(true).Order;
    }

    /// <summary>
    /// 判断类型是否实现某个泛型
    /// </summary>
    /// <param name="type">类型</param>
    /// <param name="generic">泛型类型</param>
    /// <returns>bool</returns>
    public static bool HasImplementedRawGeneric(this Type type, Type generic)
    {
        // 检查接口类型
        var isTheRawGenericType = type.GetInterfaces().Any(IsTheRawGenericType);
        if (isTheRawGenericType) return true;

        // 检查类型
        while (type != null && type != typeof(object))
        {
            isTheRawGenericType = IsTheRawGenericType(type);
            if (isTheRawGenericType) return true;
            type = type.BaseType;
        }

        return false;

        // 判断逻辑
        bool IsTheRawGenericType(Type type) => generic == (type.IsGenericType ? type.GetGenericTypeDefinition() : type);
    }

    /// <summary>
    /// 将字典转化为QueryString格式
    /// </summary>
    /// <param name="dict"></param>
    /// <param name="urlEncode"></param>
    /// <returns></returns>
    public static string ToQueryString(this Dictionary<string, string> dict, bool urlEncode = true)
    {
        return string.Join("&", dict.Select(p => $"{(urlEncode ? p.Key?.UrlEncode() : "")}={(urlEncode ? p.Value?.UrlEncode() : "")}"));
    }

    /// <summary>
    /// 将字符串URL编码
    /// </summary>
    /// <param name="str"></param>
    /// <returns></returns>
    public static string UrlEncode(this string str)
    {
        return string.IsNullOrEmpty(str) ? "" : System.Web.HttpUtility.UrlEncode(str, Encoding.UTF8);
    }

    /// <summary>
    /// List转DataTable
    /// </summary>
    /// <typeparam name="T"></typeparam>
    /// <param name="list"></param>
    /// <returns></returns>
    public static DataTable ToDataTable<T>(this List<T> list)
    {
        DataTable result = new();
        if (list.Count > 0)
        {
            result.TableName = list[0].GetType().Name; // 表名赋值
            PropertyInfo[] propertys = list[0].GetType().GetProperties();
            foreach (PropertyInfo pi in propertys)
            {
                Type colType = pi.PropertyType;
                if (colType.IsGenericType && colType.GetGenericTypeDefinition() == typeof(Nullable<>))
                {
                    colType = colType.GetGenericArguments()[0];
                }
                if (IsIgnoreColumn(pi))
                    continue;
                result.Columns.Add(pi.Name, colType);
            }
            for (int i = 0; i < list.Count; i++)
            {
                ArrayList tempList = new();
                foreach (PropertyInfo pi in propertys)
                {
                    if (IsIgnoreColumn(pi))
                        continue;
                    object obj = pi.GetValue(list[i], null);
                    tempList.Add(obj);
                }
                object[] array = tempList.ToArray();
                result.LoadDataRow(array, true);
            }
        }
        return result;
    }
    
    /// <summary>
    /// 对象序列化成json字符串
    /// </summary>
    /// <param name="obj"></param>
    /// <returns></returns>
    public static string ToJson(this object obj)
    {
        return JSON.GetJsonSerializer().Serialize(obj);
    }
    
    /// <summary>
    /// json字符串反序列化成对象
    /// </summary>
    /// <typeparam name="T"></typeparam>
    /// <param name="json"></param>
    /// <returns></returns>
    public static T ToObject<T>(this string json)
    {
        return JSON.GetJsonSerializer().Deserialize<T>(json);
    }

    /// <summary>
    /// 排除SqlSugar忽略的列
    /// </summary>
    /// <param name="pi"></param>
    /// <returns></returns>
    private static bool IsIgnoreColumn(PropertyInfo pi)
    {
        var sc = pi.GetCustomAttributes<SugarColumn>(false).FirstOrDefault(u => u.IsIgnore == true);
        return sc != null;
    }
}