Enginio C++ Examples - Image Gallery

 /****************************************************************************
 **
 ** Copyright (C) 2015 The Qt Company Ltd.
 ** Contact: http://www.qt.io/licensing/
 **
 ** This file is part of the examples of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:BSD$
 ** You may use this file under the terms of the BSD license as follows:
 **
 ** "Redistribution and use in source and binary forms, with or without
 ** modification, are permitted provided that the following conditions are
 ** met:
 **   * Redistributions of source code must retain the above copyright
 **     notice, this list of conditions and the following disclaimer.
 **   * Redistributions in binary form must reproduce the above copyright
 **     notice, this list of conditions and the following disclaimer in
 **     the documentation and/or other materials provided with the
 **     distribution.
 **   * Neither the name of The Qt Company Ltd nor the names of its
 **     contributors may be used to endorse or promote products derived
 **     from this software without specific prior written permission.
 **
 **
 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #include <QtWidgets>
 #include <QDebug>
 #include <QFrame>
 #include <QLabel>
 #include <QListView>
 #include <QMenu>
 #include <QNetworkAccessManager>
 #include <QPushButton>
 #include <QTimer>
 #include <QVBoxLayout>

 #include <enginioclient.h>
 #include <enginioreply.h>

 // To get the backend right, we use a helper class in the example.
 // Usually one would just insert the backend information below.
 #include "backendhelper.h"

 #include "imageobject.h"
 #include "mainwindow.h"
 #include "imagemodel.h"

 MainWindow::MainWindow(QWidget *parent)
     : QMainWindow(parent)
 {
     setWindowTitle(QStringLiteral("Enginio Image Gallery"));

     m_client = new EnginioClient(this);
     m_client->setBackendId(backendId("image-gallery"));

     m_model = new ImageModel(this);
     m_model->setClient(m_client);

     m_view = new QListView;
     m_view->setModel(m_model);
     m_view->setViewMode(QListView::IconMode);
     m_view->setGridSize(QSize(104, 104));

     m_fileDialog = new QFileDialog(this);
     m_fileDialog->setFileMode(QFileDialog::ExistingFile);
     m_fileDialog->setNameFilter("Image files (*.png *.jpg *.jpeg)");
     connect(m_fileDialog, SIGNAL(fileSelected(QString)),
             this, SLOT(fileSelected(QString)));

     m_uploadButton = new QPushButton("Upload image");
     connect(m_uploadButton, SIGNAL(clicked()),
             m_fileDialog, SLOT(show()));

     QFrame *frame = new QFrame;
     QVBoxLayout *windowLayout = new QVBoxLayout(frame);
     windowLayout->addWidget(m_view);
     windowLayout->addWidget(m_uploadButton);
     setCentralWidget(frame);

     queryImages();
 }

 QSize MainWindow::sizeHint() const
 {
     return QSize(500, 700);
 }

 void MainWindow::queryImages()
 {
     QJsonObject query;
     query.insert("objectType", QStringLiteral("objects.image"));
     QJsonObject fileObject;
     fileObject.insert("file", QJsonObject());

     // Use include parameter to request full "file" object for every result
     // object including image and thumbnail URLs.
     query.insert("include", fileObject);

     // Filter out objects which have not yet been uploaded completely
     QJsonObject filter;
     QJsonObject exists;
     exists.insert("$exists", true);
     filter.insert("file.id", exists);
     query.insert("query", filter);

     m_model->setQuery(query);
 }

 void MainWindow::error(EnginioReply *error)
 {
     qWarning() << Q_FUNC_INFO << error;
 }

 void MainWindow::fileSelected(const QString &filePath)
 {
     if (filePath.isEmpty())
         return;

     QJsonObject object;
     object.insert("objectType", QString("objects.image"));
     QString fileName = filePath.split(QDir::separator()).last();
     object.insert("name", fileName);
     object.insert("localPath", filePath);
     EnginioReply *reply = m_model->append(object);
     connect(reply, SIGNAL(finished(EnginioReply*)), this, SLOT(beginUpload(EnginioReply*)));
 }

 void MainWindow::beginUpload(EnginioReply *reply)
 {
     reply->deleteLater();
     QString path = reply->data().value("localPath").toString();
     QString objectId = reply->data().value("id").toString();

     QJsonObject object;
     object.insert("id", objectId);
     object.insert("objectType", QStringLiteral("objects.image"));
     object.insert("propertyName", QStringLiteral("file"));

     QJsonObject fileObject;
     fileObject.insert(QStringLiteral("fileName"), path);

     QJsonObject uploadJson;
     uploadJson.insert(QStringLiteral("targetFileProperty"), object);
     uploadJson.insert(QStringLiteral("file"), fileObject);

     EnginioReply *upload = m_client->uploadFile(uploadJson, QUrl::fromUserInput(path));
     connect(upload, SIGNAL(finished(EnginioReply*)), upload, SLOT(deleteLater()));
 }