[Photo Plugin] Make photo plugin use QUrl instead of a local path

This is a companion merge request for !476,

this way it can be accessed directly from QML's FileDialog

cli/kdeconnect-cli.cpp

@@ -295,7 +295,7 @@ int main(int argc, char** argv)
             const QString fileName = parser.value(QStringLiteral("photo"));
             if (!fileName.isEmpty()) {
                 QDBusMessage msg = QDBusMessage::createMethodCall(QStringLiteral("org.kde.kdeconnect"), QStringLiteral("/modules/kdeconnect/devices/") + device + QStringLiteral("/photo"), QStringLiteral("org.kde.kdeconnect.device.photo"), QStringLiteral("requestPhoto"));
-                msg.setArguments({fileName});
+                msg.setArguments({QUrl::fromLocalFile(fileName).toString()});
                 blockOnReply(QDBusConnection::sessionBus().asyncCall(msg));
             } else {
                 QTextStream(stderr) << i18n("Please specify a filename for the photo") << endl;

plugins/photo/photoplugin.cpp

@@ -35,18 +35,18 @@ bool PhotoPlugin::receivePacket(const NetworkPacket& np)
         return true;
     }
 
-    const QString& fileName = requestedFiles.takeFirst();
-    FileTransferJob* job = np.createPayloadTransferJob(QUrl::fromLocalFile(fileName));
-    connect(job, &FileTransferJob::result, this, [this, fileName] {
-        Q_EMIT photoReceived(fileName);
+    const QString url = requestedFiles.takeFirst();
+    FileTransferJob* job = np.createPayloadTransferJob(QUrl(url));
+    connect(job, &FileTransferJob::result, this, [this, url] {
+        Q_EMIT photoReceived(url);
     });
     job->start();
     return true;
 }
 
-void PhotoPlugin::requestPhoto(const QString& fileName)
+void PhotoPlugin::requestPhoto(const QString& url)
 {
-    requestedFiles.append(fileName);
+    requestedFiles.append(url);
     NetworkPacket np(PACKET_TYPE_PHOTO_REQUEST);
     sendPacket(np);
 }

plugins/photo/photoplugin.h

@@ -24,7 +24,7 @@ public:
     explicit PhotoPlugin(QObject* parent, const QVariantList& args);
     ~PhotoPlugin() override;
 
-    Q_SCRIPTABLE void requestPhoto(const QString& fileName);
+    Q_SCRIPTABLE void requestPhoto(const QString& url);
 
     bool receivePacket(const NetworkPacket& np) override;
     void connected() override {}
@@ -32,7 +32,7 @@ public:
     QString dbusPath() const override;
 
 Q_SIGNALS:
-    Q_SCRIPTABLE void photoReceived(const QString& fileName);
+    Q_SCRIPTABLE void photoReceived(const QString& url);
 
 private:
     QStringList requestedFiles;