Edit Game

 @Override
    public String editGame(String[] tokens) {
        StringBuilder sb = new StringBuilder();
        String id = tokens[1];

        Game game = this.gameRepository.findById(Long.parseLong(id)).orElse(null);
        if (game == null) {
            return "Game not found!";
        }

        GameEditDto gameToEdit = modelMapper.map(game, GameEditDto.class);
        gameToEdit.setId(Long.parseLong(id));

        for (int i = 2; i < tokens.length; i++) {
            String[] propertiesElements = tokens[i].split("=");
            String propertyName = propertiesElements[0];
            String propertyKey = propertiesElements[1];
            switch (propertyName) {
                case "title":
                    return "Title cannot be edited!";
                case "price":
                    gameToEdit.setPrice(new BigDecimal(propertyKey));
                    break;
                case "size":
                    gameToEdit.setSize(new BigDecimal(propertyKey));
                    break;
                case "trailer":
                    gameToEdit.setTrailer(propertyKey);
                    break;
                case "thumbnailUrl":
                    gameToEdit.setThumbnailUrl(propertyKey);
                    break;
                case "description":
                    gameToEdit.setDescription(propertyKey);
                    break;
            }
        }

        Set<ConstraintViolation<GameEditDto>> violations = this.validator.validate(gameToEdit);

        if (violations.size() > 0) {
            for (ConstraintViolation<GameEditDto> violation : violations) {
                sb.append(violation.getMessage()).append(System.lineSeparator());

            }
            return sb.toString().trim();
        } else {
            Game editedGame = this.modelMapper.map(gameToEdit, Game.class);
            if (editedGame != null) {
                Game savedGame = this.gameRepository.saveAndFlush(editedGame);
                if (savedGame != null) {
                    return String.format("Edited %s", savedGame.getTitle());
                }
            }
        }

        return null;
    }