using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

public static partial class ValidationHelper
{
    #region 常用驗證

    #region 集合系列
    /// <summary>
    /// 判斷集合是否有資料
    /// </summary>
    /// <typeparam name="T"></typeparam>
 

    /// <param name="list"></param>
    /// <returns></returns>
    public static bool ExistsData<T>(this IEnumerable<T> list)
    {
        bool b = false;
        if (list != null && list.Count() > 0)
        {
            b = true;
        }
        return
 
 b;
    } 
    #endregion

    #region Null判斷系列
    /// <summary>
    /// 判斷是否為空或Null
    /// </summary>
    /// <param name="objStr"></param>
    /// <returns></returns>
    public static bool IsNullOrWhiteSpace(this string objStr)
    {
        if (string.IsNullOrWhiteSpace
 
(objStr))
        {
            return true;
        }
        else
        {
            return false;
        }
    }

    /// <summary>
    /// 判斷型別是否為可空型別
    /// </summary>
    /// <param name="theType"></param>
    /// <returns></returns>
    public static bool IsNullableType(Type theType)
    {
        return (theType.IsGenericType && theType.GetGenericTypeDefinition().Equals(typeof(Nullable<>)));
    }
    #endregion

    #region 數字字串檢查
    /// <summary>
    /// 是否數字字串(包括小數)
    /// </summary>
    /// <param name="objStr">輸入字串</param>
    /// <returns></returns>
    public static bool IsNumber(this string objStr)
    {
        try
        {
            return Regex.IsMatch(objStr, @"^\d+(\.\d+)?$");
        }
        catch
        {
            return false;
        }
    }

    /// <summary>
    /// 是否是浮點數
    /// </summary>
    /// <param name="objStr">輸入字串</param>
    /// <returns></returns>
    public static bool IsDecimal(this string objStr)
    {
        try
        {
            return Regex.IsMatch(objStr, @"^(-?\d+)(\.\d+)?$");
        }
        catch
        {
            return false;
        }
    }
    #endregion

    #endregion

    #region 業務常用

    #region 中文檢測
    /// <summary>
    /// 檢測是否有中文字元
    /// </summary>
    /// <param name="objStr"></param>
    /// <returns></returns>
    public static bool IsZhCN(this string objStr)
    {
        try
        {
            return Regex.IsMatch(objStr, "[\u4e00-\u9fa5]");
        }
        catch
        {
            return false;
        }
    }
    #endregion

    #region 郵箱驗證
    /// <summary>
    /// 判斷郵箱地址是否正確
    /// </summary>
    /// <param name="objStr"></param>
    /// <returns></returns>
    public static bool IsEmail(this string objStr)
    {
        try
        {
            return Regex.IsMatch(objStr, @"^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$");
        }
        catch
        {
            return false;
        }
    }
    #endregion

    #region IP系列驗證
    /// <summary>
    /// 是否為ip
    /// </summary>
    /// <param name="objStr"></param>
    /// <returns></returns>
    public static bool IsIP(this string objStr)
    {
        return Regex.IsMatch(objStr, @"^((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)$");
    }

    /// <summary>  
    /// 判斷輸入的字串是否是表示一個IP地址  
    /// </summary>  
    /// <param name="objStr">被比較的字串</param>  
    /// <returns>是IP地址則為True</returns>  
    public static bool IsIPv4(this string objStr)
    {
        string[] IPs = objStr.Split('.');
        for (int i = 0; i < IPs.Length; i++)
        {
            if (!Regex.IsMatch(IPs[i], @"^\d+$"))
            {
                return false;
            }
            if (Convert.ToUInt16(IPs[i]) > 255)
            {
                return false;
            }
        }
        return true;
    }

    /// <summary>
    /// 判斷輸入的字串是否是合法的IPV6 地址  
    /// </summary>
    /// <param name="input"></param>
    /// <returns></returns>
    public static bool IsIPV6(string input)
    {
        string temp = input;
        string[] strs = temp.Split(':');
        if (strs.Length > 8)
        {
            return false;
        }
        int count = input.GetStrCount("::");
        if (count > 1)
        {
            return false;
        }
        else if (count == 0)
        {
            return Regex.IsMatch(input, @"^([\da-f]{1,4}:){7}[\da-f]{1,4}$");
        }
        else
        {
            return Regex.IsMatch(input, @"^([\da-f]{1,4}:){0,5}::([\da-f]{1,4}:){0,5}[\da-f]{1,4}$");
        }
    }
    #endregion

    #region 網址系列驗證
    /// <summary>
    /// 驗證網址是否正確（http:或者https:）【後期新增 // 的情況】
    /// </summary>
    /// <param name="objStr">地址</param>
    /// <returns></returns>
    public static bool IsWebUrl(this string objStr)
    {
        try
        {
            return Regex.IsMatch(objStr, @"http://([\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?|https://([\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?");
        }
        catch
        {
            return false;
        }
    }

    /// <summary>
    /// 判斷輸入的字串是否是一個超連結  
    /// </summary>
    /// <param name="objStr"></param>
    /// <returns></returns>
    public static bool IsURL(this string objStr)
    {
        string pattern = @"^[a-zA-Z]+://(\w+(-\w+)*)(\.(\w+(-\w+)*))*(\?\S*)?$";
        return Regex.IsMatch(objStr, pattern);
    }
    #endregion

    #region 郵政編碼驗證
    /// <summary>
    /// 驗證郵政編碼是否正確
    /// </summary>
    /// <param name="objStr">輸入字串</param>
    /// <returns></returns>
    public static bool IsZipCode(this string objStr)
    {
        try
        {
            return Regex.IsMatch(objStr, @"\d{6}");
        }
        catch
        {
            return false;
        }
    }
    #endregion

    #region 電話+手機驗證
    /// <summary>
    /// 驗證手機號是否正確
    /// </summary>
    /// <param name="objStr">手機號</param>
    /// <returns></returns>
    public static bool IsMobile(this string objStr)
    {
        try
        {
            return Regex.IsMatch(objStr, @"^13[0-9]{9}|15[012356789][0-9]{8}|18[0123456789][0-9]{8}|147[0-9]{8}$");
        }
        catch
        {
            return false;
        }
    }

    /// <summary>
    /// 匹配3位或4位區號的電話號碼，其中區號可以用小括號括起來，也可以不用，區號與本地號間可以用連字號或空格間隔，也可以沒有間隔   
    /// </summary>
    /// <param name="objStr"></param>
    /// <returns></returns>
    public static bool IsPhone(this string objStr)
    {
        try
        {
            return Regex.IsMatch(objStr, "^\\(0\\d{2}\\)[- ]?\\d{8}$|^0\\d{2}[- ]?\\d{8}$|^\\(0\\d{3}\\)[- ]?\\d{7}$|^0\\d{3}[- ]?\\d{7}$");
        }
        catch
        {
            return false;
        }
    }
    #endregion

    #region 字母或數字驗證
    /// <summary>
    /// 是否只是字母或數字
    /// </summary>
    /// <param name="objStr"></param>
    /// <returns></returns>
    public static bool IsAbcOr123(this string objStr)
    {
        try
        {
            return Regex.IsMatch(objStr, @"^[0-9a-zA-Z\$]+$");
        }
        catch
        {
            return false;
        }
    }
    #endregion

    #endregion
}