#include "cachewebpage.h"
#include "httpdownload.h"
#include "sncdatabase.h"
CacheWebPage::CacheWebPage(QString pageUrl, QString cachePath, QObject *parent):
    QThread(parent)
{
    this->pageUrl = pageUrl;
    this->cachePath = cachePath;
    this->stop = false;
    createPageCachePath();
}
CacheWebPage::~CacheWebPage()
{
    qDebug()<<QDateTime::currentDateTime().toString("yyyy-MM-dd HH:mm:ss")\
           <<"CacheWebPage Destroyed.";
}
void CacheWebPage::createPageCachePath()
{
    QString md5;
    QByteArray ba;
    ba = QCryptographicHash::hash ( this->pageUrl.toAscii(), QCryptographicHash::Md5 );
    md5.append(ba.toHex());
    QDir dir(this->cachePath);
    if(!dir.exists(md5))
    {
        dir.mkdir(md5);
    }
    if(this->cachePath.endsWith('/'))
        this->cachePath += md5 + "/";
    else
        this->cachePath += "/" + md5 + "/";
}
void CacheWebPage::abort()
{
    this-> stop = true;
}

void CacheWebPage::downloadPage()
{
    HttpDownload download;
    QString storePath = createLocalDirByUrl(this->pageUrl);
    int retCode = download.downloadFile(this->pageUrl,storePath);
    if(retCode<0)
        return ;
    if(stop)
        return ;
    QUrl url(this->pageUrl);
    QFileInfo fileInfo(url.path());
    QFile file(storePath + fileInfo.fileName());
    if(!file.open(QIODevice::ReadOnly))
        return ;
    QTextStream in(&file);
    QString souceText = in.readAll();
    file.close();
    QStringList elements = getMatchElementFromPage(souceText);
    QFileInfo fileInfo2(this->pageUrl);
    for(int i=0;i<elements.size();i++)
    {
        if(stop)
            break;
        QString link = this->pageUrl.replace(fileInfo2.fileName(),"") + elements.at(i);
        QString path = createLocalDirByUrl(link);
        HttpDownload down;
        down.downloadFile(link,path);
    }
}
QString CacheWebPage::createLocalDirByUrl(QString pageUrl)
{
    QUrl url(pageUrl);
    QString path = this->cachePath;
    QStringList subDirs = url.path().split("/");
    QDir dir(path);
    if(subDirs.size()>2)
    {
        for(int i=1;i<subDirs.size()-1;i++)
        {
            path += subDirs.at(i) + "/";
            if(!dir.exists(path))
            {
                dir.mkdir(path);
            }
        }
    }
    return path;
}
QStringList CacheWebPage::getMatchElementFromPage(QString souceText)
{
    QRegExp rx ("[a-zA-Z0-9]+/?[a-zA-Z0-9]+\\.{1}((jpg)|(gif)|(bmp)|(ico)|(png)|(js)|(css))") ;
    int pos = 0;
    QStringList elements;
    while ((pos = rx.indexIn(souceText, pos)) != -1)
    {
        pos += rx.matchedLength();
        elements<<rx.capturedTexts().at(0);
    }
    return elements;
}
void CacheWebPage::run()
{
    downloadPage();
}