using System;
using System.Text.RegularExpressions;

namespace Zhaizj.Framework {

    /// <summary>
    /// 封装了几个常用的正则表达式
    /// </summary>
    public class RegPattern {

        //public static readonly String Email = @"\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*";

        /// <summary>
        /// 网址的正则表达式
        /// </summary>
        //public static readonly String Url = @"^http\://[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(/\S*)?$";
        public static readonly string Url = @"^(ht|f)tp(s?)\:\/\/[0-9a-zA-Z]([-.\w]*[0-9a-zA-Z])*(:(0-9)*)*(\/?)([a-zA-Z0-9\-\.\?\,\'\/\\\+&amp;%\$#_]*)?$";

        // http://msdn.microsoft.com/en-us/library/ms998267.aspx

        /// <summary>
        /// email 正则表达式
        /// </summary>
        public static readonly String Email = @"^(?("")("".+?""@)|(([0-9a-zA-Z]((\.(?!\.))|[-!#\$%&'\*\+/=\?\^`\{\}\|~\w])*)(?<=[0-9a-zA-Z])@))(?(\[)(\[(\d{1,3}\.){3}\d{1,3}\])|(([0-9a-zA-Z][-\w]*[0-9a-zA-Z]\.)+[a-zA-Z]{2,6}))$";

        //public static readonly String Url = @"^(ht|f)tp(s?)\:\/\/[0-9a-zA-Z]([-.\w]*[0-9a-zA-Z])*(:(0-9)*)*(\/?)([a-zA-Z0-9\-\.\?\,\'\/\\\+&amp;%\$#_]*)?$";

        /// <summary>
        /// 货币值(小数)的正则表达式
        /// </summary>
        public static readonly String Currency = @"^\d+(\.\d\d)?$"; //1.00

        /// <summary>
        /// (负数)货币值(小数)的正则表达式
        /// </summary>
        public static readonly String NegativeCurrency = @"^(-)?\d+(\.\d\d)?$"; //-1.20

        /// <summary>
        /// html 页面中图片的正则表达式，获取&lt;img src="" /&gt; 的src部分
        /// </summary>
        public static readonly String Img = "(?<=<img.+?src\\s*?=\\s*?\"?)([^\\s\"]+?)(?=[\\s\"])";

        /// <summary>
        /// 检查 input 字符串是否和指定的正则表达式匹配
        /// </summary>
        /// <param name="input">需要检查的字符串</param>
        /// <param name="pattern">正则表达式</param>
        /// <returns></returns>
        public static Boolean IsMatch( String input, String pattern ) {
            return Regex.IsMatch( input, pattern);
        }

    }

}