kdeplasma-addons: new pexels POTD provider

requires the following commit from kdelibs:
552d89425b81d7999c08e867a98c95a673f90b4d

Signed-off-by: Ivailo Monev <xakepa10@gmail.com>

kdeplasma-addons/dataengines/potd/CMakeLists.txt

@@ -81,3 +81,24 @@ install(
     FILES apodprovider.desktop
     DESTINATION ${KDE4_SERVICES_INSTALL_DIR}
 )
+
+
+set(potd_pexels_provider_SRCS
+    pexelsprovider.cpp
+)
+
+kde4_add_plugin(plasma_potd_pexelsprovider ${potd_pexels_provider_SRCS})
+target_link_libraries(plasma_potd_pexelsprovider
+    KDE4::kio
+    KDE4::kdecore
+    ${QT_QTGUI_LIBRARY}
+    plasmapotdprovidercore 
+)
+install(
+    TARGETS plasma_potd_pexelsprovider
+    DESTINATION ${KDE4_PLUGIN_INSTALL_DIR}
+)
+install(
+    FILES pexelsprovider.desktop
+    DESTINATION ${KDE4_SERVICES_INSTALL_DIR}
+)

kdeplasma-addons/dataengines/potd/pexelsprovider.cpp

@@ -0,0 +1,143 @@
+/*
+ *   Copyright (C) 2023 Ivailo Monev <xakepa10@gmail.com>
+ *
+ *   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 2 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 Library General Public
+ *   License along with this program; if not, write to the
+ *   Free Software Foundation, Inc.,
+ *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+#include "pexelsprovider.h"
+
+#include <QImage>
+#include <QJsonDocument>
+
+#include <KDebug>
+#include <KRandom>
+#include <kio/job.h>
+
+// for reference:
+// https://www.pexels.com/api/documentation/#photos-curated
+
+static const QString s_pexelsapikey = QString::fromLatin1("WeDUAEYr4oV9211fAie7Jcwat6tNlkrW0BTx7kaoiyITGWp7WMcxpSoM");
+static const QString s_pexelsapiurl = QString::fromLatin1("https://api.pexels.com/v1/curated");
+
+POTDPROVIDER_EXPORT_PLUGIN(PexelsProvider, "PexelsProvider", "")
+
+class PexelsProvider::Private
+{
+public:
+    Private(PexelsProvider *parent)
+      : mParent(parent)
+    {
+    }
+
+    void pageRequestFinished(KJob*);
+    void imageRequestFinished(KJob*);
+    void parsePage();
+
+    PexelsProvider *mParent;
+    QImage mImage;
+
+private:
+    QStringList m_photoList;
+};
+
+void PexelsProvider::Private::pageRequestFinished(KJob *kjob)
+{
+    KIO::StoredTransferJob* kstoredjob = qobject_cast<KIO::StoredTransferJob*>(kjob);
+    if (kstoredjob->error()) {
+        kWarning() << "request error" << kstoredjob->url();
+        kstoredjob->deleteLater();
+        emit mParent->error(mParent);
+        return;
+    }
+
+    m_photoList.clear();
+
+    const QByteArray jsondata = kstoredjob->data();
+    kstoredjob->deleteLater();
+
+    const QJsonDocument jsondoc = QJsonDocument::fromJson(jsondata);
+    if (jsondoc.isNull()) {
+        kWarning() << "JSON error" << jsondoc.errorString();
+        return;
+    }
+
+    const QVariantMap jsonmap = jsondoc.toVariant().toMap();
+    const QVariantList jsonphotoslist = jsonmap["photos"].toList();
+    foreach (const QVariant &photo, jsonphotoslist) {
+        const QVariantMap photomap = photo.toMap()["src"].toMap();
+        const QString photourl = photomap["landscape"].toString();
+        if (photourl.isEmpty()) {
+            kDebug() << "skipping photo without landscape url";
+            continue;
+        }
+        kDebug() << "photo" << photourl;
+        m_photoList.append(photourl);
+    }
+
+    if (m_photoList.isEmpty()) {
+        kWarning() << "empty photo list";
+        return;
+    }
+
+    const KUrl photourl(m_photoList.at(KRandom::randomMax(m_photoList.size())));
+    kDebug() << "chosen photo" << photourl.prettyUrl();
+    kstoredjob = KIO::storedGet(photourl, KIO::NoReload, KIO::HideProgressInfo);
+    kstoredjob->setAutoDelete(false);
+    kstoredjob->addMetaData("Authorization", s_pexelsapikey);
+    mParent->connect(kstoredjob, SIGNAL(finished(KJob*)), SLOT(imageRequestFinished(KJob*)));
+}
+
+void PexelsProvider::Private::imageRequestFinished(KJob *kjob)
+{
+    KIO::StoredTransferJob* kstoredjob = qobject_cast<KIO::StoredTransferJob*>(kjob);
+    if (kstoredjob->error()) {
+        kWarning() << "image job error" << kstoredjob->url();
+        kstoredjob->deleteLater();
+        emit mParent->error(mParent);
+        return;
+    }
+
+    mImage = QImage::fromData(kstoredjob->data());
+    if (mImage.isNull()) {
+        kWarning() << "null image for" << kstoredjob->url();
+    }
+    kstoredjob->deleteLater();
+    emit mParent->finished(mParent);
+}
+
+PexelsProvider::PexelsProvider(QObject *parent, const QVariantList &args)
+    : PotdProvider(parent, args),
+    d(new Private(this))
+{
+    const KUrl queryurl(s_pexelsapiurl);
+    kDebug() << "starting job for" << queryurl.prettyUrl();
+    KIO::StoredTransferJob *kstoredjob = KIO::storedGet(queryurl, KIO::NoReload, KIO::HideProgressInfo);
+    kstoredjob->setAutoDelete(false);
+    kstoredjob->addMetaData("Authorization", s_pexelsapikey);
+    connect(kstoredjob, SIGNAL(finished(KJob*)), SLOT(pageRequestFinished(KJob*)));
+}
+
+PexelsProvider::~PexelsProvider()
+{
+    delete d;
+}
+
+QImage PexelsProvider::image() const
+{
+    return d->mImage;
+}
+
+#include "moc_pexelsprovider.cpp"

kdeplasma-addons/dataengines/potd/pexelsprovider.desktop

@@ -0,0 +1,9 @@
+[Desktop Entry]
+Type=Service
+X-KDE-ServiceTypes=PlasmaPoTD/Plugin
+X-KDE-Library=plasma_potd_pexelsprovider
+X-KDE-PlasmaPoTDProvider-Identifier=pexels
+Icon=
+
+Name=Pexels Picture of the Day
+Comment=Pexels Provider

kdeplasma-addons/dataengines/potd/pexelsprovider.h

@@ -0,0 +1,42 @@
+/*
+ *   Copyright (C) 2023 Ivailo Monev <xakepa10@gmail.com>
+ *
+ *   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 2 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 Library General Public
+ *   License along with this program; if not, write to the
+ *   Free Software Foundation, Inc.,
+ *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+#ifndef PEXELSPROVIDER_H
+#define PEXELSPROVIDER_H
+
+#include "potdprovider.h"
+
+class PexelsProvider : public PotdProvider
+{
+    Q_OBJECT
+public:
+    PexelsProvider(QObject *parent, const QVariantList &args);
+    ~PexelsProvider();
+
+    virtual QImage image() const;
+
+private:
+    class Private;
+    Private* const d;
+
+    Q_PRIVATE_SLOT(d, void pageRequestFinished(KJob *))
+    Q_PRIVATE_SLOT(d, void imageRequestFinished(KJob *))
+};
+
+#endif