package org.springframework.web.portlet.sample;

import java.text.SimpleDateFormat;
import java.util.Date;

import javax.portlet.ActionRequest;
import javax.portlet.ActionResponse;
import javax.portlet.PortletRequest;
import javax.portlet.RenderRequest;
import javax.portlet.RenderResponse;

import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.propertyeditors.CustomDateEditor;
import org.springframework.validation.BindException;
import org.springframework.web.portlet.bind.PortletRequestDataBinder;
import org.springframework.web.portlet.mvc.SimpleFormController;
import org.springframework.web.portlet.ModelAndView;

public class BookEditController extends SimpleFormController implements InitializingBean {

    private BookService bookService;
   
    public void afterPropertiesSet() throws Exception {
        if (this.bookService == null)
            throw new IllegalArgumentException("A BookService is required");
    }

    public void onSubmitAction(ActionRequest request, ActionResponse response,
            Object command,    BindException errors) throws Exception {
       
        Book book = (Book) command;
        Integer key;

        try {
            key = new Integer(request.getParameter("book"));
        } catch (NumberFormatException ex) {
            key = null;
        }
       
        if (key == null) {
            bookService.addBook(book);
        } else {
            bookService.saveBook(book);
        }

        response.setRenderParameter("action","books");
    }
   
    protected Object formBackingObject(PortletRequest request)
            throws Exception {

        Book book;

        try {
            Integer key = new Integer(request.getParameter("book"));
            book = bookService.getBook(key);
        } catch (NumberFormatException ex) {
            book = new Book();
        }
       
        return book;
    }
   
    protected void initBinder(PortletRequest request, PortletRequestDataBinder binder)
            throws Exception {
        SimpleDateFormat dateFormat = new SimpleDateFormat("MM/dd/yyyy");
        binder.registerCustomEditor(Date.class, null, new    CustomDateEditor(dateFormat, true));
        binder.setAllowedFields(new String[] {"author","title","description","availability","count"});
    }

    protected ModelAndView renderInvalidSubmit(RenderRequest request, RenderResponse response)
            throws Exception {
        return null;
    }
   
    protected void handleInvalidSubmit(ActionRequest request, ActionResponse response)
            throws Exception {
        response.setRenderParameter("action","books");
    }

    public void setBookService(BookService bookService) {
        this.bookService = bookService;
    }
}