create song storage class

sync/song.cpp

@@ -45,14 +45,6 @@ bool SongHeader::isValid() const{
 
 SongHeader::~SongHeader(){}
 
-
-
-Song::Song():
-    SongHeader()
-{
-    source.clear();
-}
-
 QDataStream& operator << (QDataStream& stream, const SongHeader& song){
     stream << song.id;
     stream << song.name;
@@ -66,6 +58,57 @@ QDataStream& operator >> (QDataStream& stream, SongHeader& song){
     return stream;
 }
 
+SongStorage::SongStorage():
+    SongHeader()
+{
+    url.clear();
+}
+
+SongStorage::SongStorage(const SongHeader& from)
+    :SongStorage::SongStorage()
+{
+    this->id = from.id;
+    this->name = from.name;
+    this->size = from.size;
+}
+
+unsigned int SongStorage::getSize() const{
+    return SongHeader::getSize();
+}
+
+const QUrl& SongStorage::getSource()const{
+    return url;
+}
+
+QMediaContent SongStorage::toMedia()const{
+    return QMediaContent(url);
+}
+
+bool SongStorage::isValid() const{
+
+    return SongHeader::isValid() && url.isValid();
+}
+
+SongStorage::~SongStorage(){}
+
+QDataStream& operator << (QDataStream& stream,const SongStorage& song){
+    stream << static_cast<const SongHeader&>(song);
+    stream << song.url;
+    return stream;
+}
+
+QDataStream& operator >> (QDataStream& stream, SongStorage& song){
+    stream >> static_cast<SongHeader&>(song);
+    stream >> song.url;
+    return stream;
+}
+
+Song::Song():
+    SongHeader()
+{
+    source.clear();
+}
+
 Song::Song(const SongHeader& from)
     :Song::Song()
 {

sync/song.h

@@ -4,6 +4,7 @@
 #include <QByteArray>
 #include <QDataStream>
 #include "chronotime.h"
+#include <QMediaContent>
 
 namespace syncLib {
 
@@ -49,11 +50,31 @@ public:
     friend QDataStream& operator >> (QDataStream& stream, SongHeader& song);
 };
 
+/**
+ * @brief The SongStorage class
+ * header with url to song source
+ */
+class SongStorage : public SongHeader {
+private:
+    QUrl url;
+public:
+    SongStorage();
+    SongStorage(const SongHeader& from);
+    const QUrl& getSource()const;
+    QMediaContent toMedia()const;
+    unsigned int getSize() const;
+    bool isValid() const;
+    ~SongStorage();
+    friend QDataStream& operator << (QDataStream& stream, const SongStorage& song);
+    friend QDataStream& operator >> (QDataStream& stream, SongStorage& song);
+    friend class MySql;
+};
+
 /**
  * @brief The Song class
  * into this calss added mediadata of playable media file.
  */
-class Song : public SongHeader{
+class Song : public SongHeader {
 private:
     QByteArray source;
 public: