using K4os.Compression.LZ4.Encoders;
using K4os.Compression.LZ4;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using WechatBakTool.Interface;
using WechatBakTool.Model;
using System.Xml;
namespace WechatBakTool
{
public class HtmlExport : IExport
{
private string HtmlBody = "";
private WXSession? Session = null;
public void InitTemplate(WXSession session)
{
Session = session;
HtmlBody = "<!DOCTYPE html><html><head><meta charset=\"utf-8\"><title>溯雪微信聊天记录备份工具</title><style>p{margin:0px;}.msg{padding-bottom:10px;}.nickname{font-size:10px;}.content{font-size:14px;}</style></head><body>";
HtmlBody += string.Format("<div class=\"msg\"><p class=\"nickname\"><b>与 {0}({1}) 的聊天记录</b></p>", Session.NickName, Session.UserName);
HtmlBody += string.Format("<div class=\"msg\"><p class=\"nickname\"><b>导出时间：{0}</b></p><hr/>", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"));
}
public void InitTemplate(WXContact contact)
{
WXSession session = new WXSession();
session.NickName = contact.NickName;
session.UserName = contact.UserName;
InitTemplate(session);
}
public void Save(string path = "",bool append = false)
{
if (!append)
{
File.WriteAllText(path, HtmlBody);
}
else
{
File.AppendAllText(path, HtmlBody);
HtmlBody = "";
}
}
public void SetEnd()
{
HtmlBody += "</body></html>";
}
public void SetMsg(WXUserReader reader,WXContact contact)
{
if (Session == null)
throw new Exception("请初始化模版：Not Use InitTemplate");
List<WXMsg>? msgList = reader.GetWXMsgs(contact.UserName);
if (msgList == null)
throw new Exception("获取消息失败，请确认数据库读取正常");
msgList.Sort((x, y) => x.CreateTime.CompareTo(y.CreateTime));
foreach (var msg in msgList)
{
HtmlBody += string.Format("<div class=\"msg\"><p class=\"nickname\">{0} <span style=\"padding-left:10px;\">{1}</span></p>", msg.IsSender ? "我" : Session.NickName, TimeStampToDateTime(msg.CreateTime).ToString("yyyy-MM-dd HH:mm:ss"));
if (msg.Type == 1)
HtmlBody += string.Format("<p class=\"content\">{0}</p></div>", msg.StrContent);
else if (msg.Type == 3)
{
string? path = reader.GetAttachment(WXMsgType.Image, msg);
if (path == null)
{
HtmlBody += string.Format("<p class=\"content\">{0}</p></div>", "图片转换出现错误或文件不存在");
continue;
}
HtmlBody += string.Format("<p class=\"content\"><img src=\"{0}\" style=\"max-height:1000px;max-width:1000px;\"/></p></div>", path);
}
else if (msg.Type == 43)
{
string? path = reader.GetAttachment(WXMsgType.Video, msg);
if (path == null)
{
HtmlBody += string.Format("<p class=\"content\">{0}</p></div>", "视频不存在");
continue;
}
HtmlBody += string.Format("<p class=\"content\"><video controls style=\"max-height:300px;max-width:300px;\"><source src=\"{0}\" type=\"video/mp4\" /></video></p></div>", path);
}
else if(msg.Type== 49)
{
using (var decoder = LZ4Decoder.Create(true, 64))
{
byte[] target = new byte[10240];
int res = 0;
if(msg.CompressContent != null)
res = LZ4Codec.Decode(msg.CompressContent, 0, msg.CompressContent.Length, target, 0, target.Length);
byte[] data = target.Skip(0).Take(res).ToArray();
string xml = Encoding.UTF8.GetString(data);
if (!string.IsNullOrEmpty(xml))
{
xml = xml.Replace("\n", "");
XmlDocument xmlObj = new XmlDocument();
xmlObj.LoadXml(xml);
if(xmlObj.DocumentElement != null)
{
string title = "";
string appName = "";
string url = "";
XmlNodeList? findNode = xmlObj.DocumentElement.SelectNodes("/msg/appmsg/title");
if(findNode != null)
{
if(findNode.Count > 0)
{
title = findNode[0]!.InnerText;
}
}
findNode = xmlObj.DocumentElement.SelectNodes("/msg/appmsg/sourcedisplayname");
if (findNode != null)
{
if (findNode.Count > 0)
{
appName = findNode[0]!.InnerText;
}
}
findNode = xmlObj.DocumentElement.SelectNodes("/msg/appmsg/url");
if (findNode != null)
{
if (findNode.Count > 0)
{
url = findNode[0]!.InnerText;
}
}
HtmlBody += string.Format("<p class=\"content\">{0}|{1}</p><p><a href=\"{2}\">点击访问</a></p></div>", appName, title, url);
}
}
}
}
else if (msg.Type == 34)
{
string? path = reader.GetAttachment(WXMsgType.Audio, msg);
if (path == null)
{
HtmlBody += string.Format("<p class=\"content\">{0}</p></div>", "语音不存在");
continue;
}
HtmlBody += string.Format("<p class=\"content\"><audio controls src=\"{0}\"></audio></p></div>", path);
}
else
{
HtmlBody += string.Format("<p class=\"content\">{0}</p></div>", "暂未支持的消息");
}
}
}
private static DateTime TimeStampToDateTime(long timeStamp, bool inMilli = false)
{
DateTimeOffset dateTimeOffset = inMilli ? DateTimeOffset.FromUnixTimeMilliseconds(timeStamp) : DateTimeOffset.FromUnixTimeSeconds(timeStamp);
return dateTimeOffset.LocalDateTime;
}
}
}