64 lines
1.9 KiB
C#
64 lines
1.9 KiB
C#
using Base62;
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using Domain.Events;
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using Domain.SeedWork;
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Security.Cryptography;
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using System.Text;
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using System.Threading.Tasks;
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namespace Domain.AggregateModel.LinkAggregate
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{
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public class Link:Entity,IAggregateRoot
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{
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/// <summary>
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/// 非自增主键
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/// </summary>
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public string ShortCode { get; private set; }
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public string BaseUrl { get; private set; }
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public string SuffixUrl { get; private set; }
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public string FullUrl { get; private set; }
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public int AppId { get; private set; }
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public DateTime Time { get; private set; }
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private Link()
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{
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}
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/// <summary>
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/// 创建一条新的短链接
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/// </summary>
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/// <param name="baseUrl"></param>
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/// <param name="suffixUrl"></param>
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/// <param name="appId">分配的应用id</param>
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public Link(string baseUrl,string suffixUrl,string fullUrl,int appId,string shortCode)
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{
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BaseUrl = baseUrl;
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SuffixUrl = suffixUrl;
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FullUrl = fullUrl;
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ShortCode = shortCode;
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AppId = appId;
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Time = DateTime.Now;
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AddDomainEvent(new LinkCreatedDomainEvent(this));
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}
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/// <summary>
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/// 根据值计算短链字段
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/// </summary>
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/// <returns></returns>
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private void CalculateShortCode()
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{
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string code;
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using (var md5 = MD5.Create())
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{
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var result = md5.ComputeHash(Encoding.UTF8.GetBytes(FullUrl));
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var res = new[] { BitConverter.ToInt64(result, 0) ,BitConverter.ToInt64(result,8)};
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//任意取其中一条即可
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code = res[0].ToBase62();
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}
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ShortCode = code;
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}
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}
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}
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