Add simple TCP socket listener.(and actual class) Fix next track accidentally playing last track again.

README

@@ -1,5 +1,10 @@
-How To Build This Template
--=-=-=-=-=-=-=-=-=-=-=-=-=
+About
+=====
+KDE Plasma DataEngine and Service that can queue Youtube and Bandcamp songs(by way of youtube-dl) and play them on the device. Also supports accepting remote commands on TCP socket(54634), discoverable through DNS-SD.
+
+
+How To Build
+-=-=-=-=-=-=
 
 --- On Unix:
 
@@ -20,3 +25,4 @@ Requires:
 * KDNSSD
 * youtube-dl
 * QtMultimedia
+* QtNetwork

src/minimediaplayer.cpp

@@ -173,8 +173,8 @@ void MiniMediaPlayer::mediaStatusChanged(QMediaPlayer::MediaStatus status)
     }
     else if(status == QMediaPlayer::MediaStatus::LoadedMedia)
     {
-        //Start playing media
-        m_player->play();
+        //Start playing media if more in playlsit
+        if(playlist.size() > 0) m_player->play();
     }
 }
 

src/simplecastengine.cpp

@@ -30,7 +30,7 @@ SimpleCastEngine::SimpleCastEngine(QObject *parent, const QVariantList &args)
     connect(player,SIGNAL(trackDurationChanged(qint64)),this,SLOT(durationChanged(qint64)));
     connect(player,SIGNAL(trackPositionChanged(qint64)),this,SLOT(positionChanged(qint64)));
     connect(player,SIGNAL(playlistChanged(QStringList)),this,SLOT(playlistChanged(QStringList)));
-    tcpService.listen();
+    tcpService.listen(QHostAddress::Any,54634);
 }
 
 void SimpleCastEngine::durationChanged(qint64 length)

src/simplecasttcpservice.cpp

@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 2019  Kevin Whitaker <eyecreate@eyecreate.org>
+ *
+ * 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 "simplecasttcpservice.h"
+#include <QThread>
+#include <QTcpSocket>
+#include <QDataStream>
+
+class SimpleCastTcpThread : public QThread
+{
+    Q_OBJECT
+public:
+    SimpleCastTcpThread(int socketDescriptor, MiniMediaPlayer *player, QObject *parent) : QThread(parent), socketDescriptor(socketDescriptor), player(player)
+    {
+    }
+    
+    void run() override
+    {
+        QTcpSocket openSocket;
+        if (!openSocket.setSocketDescriptor(socketDescriptor)) 
+        {
+            emit error(openSocket.error());
+            return;
+        }
+        
+        QByteArray data;
+        openSocket.waitForConnected();
+        openSocket.waitForReadyRead();
+        data = openSocket.readAll();
+        
+        //All Messages start with name header
+        if(QString::fromUtf8(data).startsWith("SIMPLECAST|"))
+        {
+            //Split message into parts
+            QStringList message = QString::fromUtf8(data).split("|");
+            if(message.size() == 2 && message[1] == "skipToNextTrack")
+            {
+                openSocket.write(player->nextTrack()?"0":"1");
+            }
+            else if(message.size() == 3 && message[1] == "changePlayState")
+            {
+                openSocket.write(player->playPauseTrack(message[2]=="0"?true:false)?"0":"1");
+            }
+            else if(message.size() == 3 && message[1] == "addURLToPlaylist")
+            {
+                openSocket.write(player->addURLToPlaylist(QUrl(message[2]))?"0":"1");
+            }
+            else
+            {
+                openSocket.write("0");
+            }
+        }
+        
+        
+        if(!openSocket.waitForDisconnected()) openSocket.close();
+        
+        
+    }
+    int socketDescriptor;
+    MiniMediaPlayer *player;
+signals:
+    void error(QTcpSocket::SocketError socketError);
+};
+
+SimpleCastTcpService::SimpleCastTcpService(MiniMediaPlayer *player,QObject *parent) : QTcpServer(parent),player(player)
+{
+}
+
+bool SimpleCastTcpService::listen(const QHostAddress& address, quint16 port)
+{
+    bool listening = QTcpServer::listen(address,port);
+    
+    //Setup DNSSD
+    dnsService = new KDNSSD::PublicService(QString(),"_simplecast._tcp",this->serverPort(),"local");
+    dnsService->setParent(this);
+    dnsService->publishAsync();
+    return listening;
+}
+
+void SimpleCastTcpService::close()
+{
+    QTcpServer::close();
+    dnsService->stop();
+}
+
+void SimpleCastTcpService::incomingConnection(qintptr handle)
+{
+    SimpleCastTcpThread *thread = new SimpleCastTcpThread(handle,player,this);
+    connect(thread, SIGNAL(finished()), thread, SLOT(deleteLater()));
+    thread->start();
+}
+
+#include "simplecasttcpservice.moc"
+

src/simplecasttcpservice.h

@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2019  Kevin Whitaker <eyecreate@eyecreate.org>
+ *
+ * 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/>.
+ */
+
+#ifndef SIMPLECASTTCPSERVICE_H
+#define SIMPLECASTTCPSERVICE_H
+
+#include <QTcpServer>
+#include <KDNSSD/DNSSD/PublicService>
+#include "minimediaplayer.h"
+
+/**
+ * Tcp Server that responds to simple client requests and can be found over DNSSD.
+ */
+class SimpleCastTcpService : public QTcpServer
+{
+    Q_OBJECT
+
+public:
+    SimpleCastTcpService(MiniMediaPlayer *player,QObject *parent = 0);
+    bool listen(const QHostAddress &address = QHostAddress::Any, quint16 port = 0);
+    void close();
+    
+protected:
+    void incomingConnection(qintptr handle) override;
+    
+private:
+    MiniMediaPlayer *player;
+    KDNSSD::PublicService *dnsService;
+
+};
+
+#endif // SIMPLECASTTCPSERVICE_H