app/sources/bluerockbackend.cpp

/*
    blueROCK - for digital rock
    Copyright (C) 2019  Dorian Zedler

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "headers/bluerockbackend.h"

BlueRockBackend::BlueRockBackend(QObject *parent) : QObject(parent)
{
    this->_shareUtils = new ShareUtils(this);
    this->shareResultsAsPoster("test");
}

QVariant BlueRockBackend::getWidgetData(QVariantMap params) {
    QString requestUrl;
    if(params["nation"].toString() == "ICC") {
        requestUrl = "https://www.digitalrock.de/egroupware/ranking/json.php?";
        params["nation"] = "";
    }
    else if (params["nation"].toString() == "GER") {
        requestUrl = "https://www.digitalrock.de/egroupware/ranking/json.php?";
    }
    else if (params["nation"].toString() == "SUI") {
        requestUrl = "https://www.digitalrock.de/egroupware/ranking/json.php?";
    }
    else {
        params.remove("nation");
        requestUrl = "https://www.digitalrock.de/egroupware/ranking/json.php?";
    }

    for(QVariantMap::const_iterator iter = params.begin(); iter != params.end(); ++iter) {
        requestUrl += iter.key() + "=" + iter.value().toString() + "&";
    }

    requestUrl = requestUrl.left(requestUrl.length() - 1); // remove last '&'

    qDebug() << requestUrl;

    QVariantMap ret = this->senddata(QUrl(requestUrl));

    if(ret["status"] != 200) {
        // request was a failure
        return QVariantMap({{"status", ret["status"]}, {"data", ""}});
    }

    QJsonDocument jsonReply = QJsonDocument::fromJson(ret["text"].toString().toUtf8());

    QVariantMap data = {{"status", 200}, {"data", jsonReply.toVariant()}};

    return data;
}


QVariantMap BlueRockBackend::getParamsFromUrl(QString stringUrl) {
    stringUrl = stringUrl.replace("#!", "?");
    QUrl url(stringUrl);
    QUrlQuery query(url.query());

    QVariantMap params;

    for(QPair<QString, QString> pair : query.queryItems()) {
        if(params.contains(pair.first))
            params[pair.first] = pair.second;
        else
            params.insert(pair.first, pair.second);
    }

    return params;
}

void BlueRockBackend::shareResultsAsUrl(QString url) {
    this->_shareUtils->shareText(url);
}

void BlueRockBackend::shareResultsAsPoster(QString url) {
    QPdfWriter writer("/tmp/test.pdf");
    writer.setPageSize(QPageSize(QPageSize::A4));
    writer.setPageMargins(QMargins(0, 0, 0, 0));
    writer.setResolution(600);
    QPainter painter(&writer);
    painter.drawText(QRect(0, 0, 1980, 100),Qt::AlignHCenter|Qt::AlignBottom,
                     "Children's Health Checkup Form");
    QPixmap image(":/PosterTemplate.png");
    painter.drawPixmap(0,0, writer.width(), writer.height(), image);
    painter.end();
}

// ------------------------
// --- Helper functions ---
// ------------------------

QVariantMap BlueRockBackend::senddata(QUrl serviceUrl, QUrlQuery pdata)
{
    // create network manager
    QNetworkAccessManager * networkManager = new QNetworkAccessManager();

    QVariantMap ret; //this is a custom type to store the return-data

    // Create network request
    QNetworkRequest request(serviceUrl);
    request.setHeader(QNetworkRequest::ContentTypeHeader,
                      "application/x-www-form-urlencoded");

    //QSslConfiguration config = QSslConfiguration::defaultConfiguration();
    //config.setProtocol(QSsl::TlsV1_2);
    //request.setSslConfiguration(config);

    //send a POST request with the given url and data to the server

    QNetworkReply *reply;

    if(pdata.isEmpty()) {
        // if no post data is given -> send a GET request
        reply = networkManager->get(request);
    }
    else {
        // if post data is given -> send POST request
        reply = networkManager->post(request, pdata.toString(QUrl::FullyEncoded).toUtf8());
    }

    // loop to wait until the request has finished before processing the data
    QEventLoop loop;
    // timer to cancel the request after 3 seconds
    QTimer timer;
    timer.setSingleShot(true);

    // quit the loop when the request finised
    loop.connect(networkManager, SIGNAL(finished(QNetworkReply*)), SLOT(quit()));
    // or the timer timed out
    loop.connect(&timer, SIGNAL(timeout()), &loop, SLOT(quit()));
    // start the timer
    timer.start(10000);
    // start the loop
    loop.exec();

    //get the status code
    QVariant status_code = reply->attribute(QNetworkRequest::HttpStatusCodeAttribute);

    ret.insert("status", status_code.toInt());

    //get the full text response
    ret.insert("text", QString::fromUtf8(reply->readAll()));

    // delete the reply object
    delete reply;

    // delete the newtwork access manager object
    delete networkManager;

    //return the data
    return(ret);
}

// -------------------------
// --- Functions for QML ---
// -------------------------