webdownloader.cpp


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#include <QNetworkReply>
#include <QNetworkRequest>
#include <QJsonDocument>
#include <QJsonObject>
#include <QJsonArray>

#include "webdownloader.h"

WebDownloader::WebDownloader(QObject *parent) : QObject(parent) {
    mAccessMgr = new QNetworkAccessManager(this);
    connect(mAccessMgr, &QNetworkAccessManager::finished, this, &WebDownloader::dlFinished);
}

void WebDownloader::fetchData(QString artist, QString album){
    mArtist = artist;
    mAlbum = album;
    QString artistQ = QString("artist:\"%1\"").arg(artist);
    QByteArray peq = QUrl::toPercentEncoding(artistQ);
    QString url = QString("https://musicbrainz.org/ws/2/release/?query=%1&fmt=json&limit=100").arg(QString(peq));
    QUrl aUrl(url);
    QNetworkRequest req(aUrl);
    req.setHeader(QNetworkRequest::UserAgentHeader, "Beetplayer/1.0.0 (beetplayer@d-tor.org");
    mAccessMgr->get(req);
}

void WebDownloader::dlFinished(QNetworkReply *reply){
    mData.clear();
    mOtherData.clear();
    QByteArray res = reply->readAll();
    QJsonParseError err;
    QJsonDocument jDoc = QJsonDocument::fromJson(res, &err);
    QJsonObject docObj = jDoc.object();
    QJsonArray relArr = docObj.value("releases").toArray();
    for(QJsonArray::const_iterator it = relArr.constBegin(); it != relArr.constEnd(); ++it){
        QJsonValue v = *it;
        QString title = v.toObject().value("title").toString().toLower();
        QString curId = v.toObject().value("release-group").toObject().value("id").toString();
        qDebug() << mAlbum << title;
        if(mAlbum == title){
            if(!mData.contains(curId)){
                mData << curId;
            }
        }else{
            mOtherData.insert(title, curId);
        }
    }
    reply->deleteLater();
    emit done();
}