package dk.hansen;

import javax.servlet.http.*;

import org.apache.log4j.Logger;
import org.apache.struts.action.*;

public final class DetailCDAction extends CommonCDAction {

   private static Logger logger = 
     Logger.getLogger(DetailCDAction.class.getName());

   public ActionForward commonExecute(
      ActionMapping mapping,
      ActionForm form,
      HttpServletRequest request,
      HttpServletResponse response) {

      ActionErrors errors = new ActionErrors();

      // Get the index of the CD (given in the hyperlink)
      DetailCDForm df = (DetailCDForm) form;
      String index = df.getId();
      if (index == null || index.equals("")) {
         // Logging the error:
         String message = "No id given to the detail action";
         logger.fatal(message);
         
         // Message for the user:
         errors.add("label", new ActionError("error.noindex"));
         saveErrors(request, errors);
         
         // Save the exception:
         request.setAttribute("MYEXCEPTION", new DAOException(message));
         
         // Return to the error page
         return (mapping.findForward("error"));
      }

      // Get the factory class
      HttpSession session = request.getSession();
      CDManagerFactoryIF factory = (CDManagerFactoryIF) session.getAttribute("cdfactory");
      CDManagerIF manager = factory.createCDManager();

      // Transfer the data from the cd bean to the ActionForm
      CD cd = null;
      try {
         cd = manager.getCD(index);
      } catch (DAOException e) {
         // Logging the error:
         String message = "CD could not be listed. id=" + index;
         logger.fatal(message, e);
         
         // Message for the user:
         errors.add("label", new ActionError("error.detailfailed"));
         saveErrors(request, errors);
         
         // Save the chained exceptions:
         request.setAttribute("MYEXCEPTION", new DAOException(message, e));
         
         // Return to the error page
         return (mapping.findForward("error"));
      }

      if (cd == null) {
         // Logging the error:
         String message = "CD could not be listed. id=" + index;
         logger.fatal(message);
         
         // Message for the user:
         errors.add("label", new ActionError("error.detailfailed"));
         saveErrors(request, errors);
         
         // Save the chained exceptions:
         request.setAttribute("MYEXCEPTION", new DAOException(message));
         
         // Return to the error page
         return (mapping.findForward("error"));
      }
      
      df.setTitle(cd.getTitle());
      df.setAuthor(cd.getAuthor());
      df.setYear(cd.getYear());
      
      // Forward control to the list page
      return (mapping.findForward("detail"));
   }

}