New method getMoveListStringsGrouped in ChessEngine

schach/src/main/java/de/hs_mannheim/informatik/chess/model/ChessEngine.java

@@ -42,6 +42,20 @@ public class ChessEngine {
         return destinations;
     }
     
+    public List<String> getMoveListStringsGrouped() {
+        List<String> result = new ArrayList<>();
+        StringBuilder sb = new StringBuilder();
+        for (int i = 0; i < moves.size(); i++) {
+            if (i % 2 == 0) sb.append((i/2 + 1) + ". ");
+            sb.append(moves.get(i).toString()).append(" ");
+            if (i % 2 == 1 || i == moves.size() - 1) {
+                result.add(sb.toString().trim());
+                sb = new StringBuilder();
+            }
+        }
+        return result;
+    }
+    
     public PieceDTO getPieceAt(String square) {
         Piece piece = board.getPiece(Square.valueOf(square.toUpperCase()));
         return convertPieceToDTO(piece);