Almost done with updating metadata of song, just need to handle records that have no related records associated with them

include/manager/SongManager.h

@@ -2,12 +2,14 @@
 #define SONGMANAGER_H_
 
 #include <iostream>
+#include <map>
 #include <string>
 
 #include <nlohmann/json.hpp>
 
 #include "dto/SongDto.hpp"
 #include "model/Models.h"
+#include "type/SongChanged.h"
 
 namespace manager
 {
@@ -17,6 +19,7 @@ namespace manager
         SongManager(std::string&);
         SongManager(const model::BinaryPath&);
 
+
         bool didSongChange(const model::Song&, const model::Song&);
         bool requiresFilesystemChange(const model::Song&, const model::Song&);
 
@@ -28,9 +31,17 @@ namespace manager
 
         static void printSong(const model::Song&);
     private:
+        std::map<type::SongChanged, bool> changesInSong(const model::Song&, const model::Song&);
+
+        void assignMiscId(model::Song&, const model::Song&);
+        void assignMiscFields(std::map<type::SongChanged, bool>&, model::Song&, 
+            const model::Song&);
         void saveSongTemp(model::Song&);
         void saveMisc(model::Song&);
         void deleteMisc(const model::Song&);
+        void updateMisc(const std::map<type::SongChanged, bool>&, 
+            model::Song&, const model::Song&);
+        void modifySongOnFilesystem(model::Song&, const model::Song&);
 
         model::BinaryPath m_bConf;
         std::string exe_path;