now I actually implemented the shuffle button

src/Controller/MusicPlayer/MusicPlayer.cpp

@@ -70,7 +70,7 @@ void MusicPlayer::MoveSongInQueue(Song* songToMove, Song* otherSong, bool before
   songQueue->MoveSongInPriorityQueue(songToMove, otherSong, beforeElseAfter);
 }
 
-void MusicPlayer::shuffleQueue( ) {
+void MusicPlayer::shuffleHandler( ) {
   shuffle ? songQueue->ShufflePlaylist( ) : songQueue->RestorePlaylist( );
 }
 

src/Controller/MusicPlayer/MusicPlayer.h

@@ -19,7 +19,7 @@ public:
   }
 
 private:
-  MusicPlayer( ) { }
+  MusicPlayer( ) : songQueue(new SongQueue( )) { }
 
   // 0 no shuffle, 1 shuffling
   int shuffle = 0;
@@ -36,7 +36,7 @@ private:
 
   Audio& audio = Audio::getInstance( );
 
-  void shuffleQueue( );
+  void shuffleHandler( );
   void setQueueLoop( );
 
 public:
@@ -95,7 +95,10 @@ public:
    */
   Song* GetCurrentlyPlaying( );
 
-  void SetShuffle(bool shuffle) { this->shuffle = shuffle; }
+  void SetShuffle(bool shuffle) {
+    this->shuffle = shuffle;
+    shuffleHandler( );
+  }
   bool GetShuffle( ) { return shuffle; }
   void SetLoop(Loop loop) { this->loop = loop; }
   Loop GetLoop( ) { return loop; }

src/core/SongQueue/ConditionalCircularLinkedList/ConditionalCircularLinkedList.cpp

@@ -1,7 +1,5 @@
 #include "ConditionalCircularLinkedList.h"
 
-ConditionalCircularLinkedList::ConditionalCircularLinkedList( ) { }
-
 void ConditionalCircularLinkedList::Append(Song* song) {
   Node* newNode = new Node(song);
   if (head == nullptr) {

src/core/SongQueue/ConditionalCircularLinkedList/ConditionalCircularLinkedList.h

@@ -22,8 +22,8 @@ private:
   // Variable to either link or unlink the list
   bool isLinked;
 public:
-  ConditionalCircularLinkedList( );
+  ConditionalCircularLinkedList( ) : head(nullptr), isLinked(false), current(nullptr) { }
-  ConditionalCircularLinkedList(bool isLinked) : head(nullptr), isLinked(isLinked) { }
+  ConditionalCircularLinkedList(bool isLinked) : head(nullptr), isLinked(isLinked), current(nullptr) { }
 
   /**
    * @brief Append a new song to the queue

src/core/SongQueue/SongQueue.cpp

@@ -1,7 +1,7 @@
 #include "SongQueue.h"
 
 SongQueue::SongQueue( ) {
-  queue = new ConditionalCircularLinkedList( );
+  queue = new ConditionalCircularLinkedList(false);
 
   // Its never going to be linked, I'm just too lazy to make a new implementation thats almost the same
   priorityQueue = new ConditionalCircularLinkedList(false);
@@ -77,6 +77,7 @@ void SongQueue::MoveSongInPriorityQueue(Song* songToMove, Song* otherSong, bool
 }
 
 void SongQueue::ShufflePlaylist( ) {
+  if (queue && queue->IsEmpty( )) return;
   //First backup the original list state
   queue_original = new ConditionalCircularLinkedList(queue);