package org.paneris.bibliomania;

 import java.util.Enumeration;

 import java.util.Vector;

 import org.melati.Melati;

 import org.webmacro.servlet.WebContext;

 public class AllMessageboards extends BibliomaniaServlet {

   /**

    * 

    */

   private static final long serialVersionUID = 1L;

   protected String bibliomaniaHandle(Melati melati, WebContext context)

             throws Exception {

     BibliomaniaDatabase db = (BibliomaniaDatabase) melati.getDatabase();

     db.setupContext(melati, context, null, null);

     Vector sectionGroups = load(db.getSectionGroupTable().selection());

     Vector sections = load(db.getSectionTable().selection());

     Vector authors = load(db.getAuthorTable().selection());

     Vector books =  load(db.getBookTable().selection());

     authors = ensure(authors, books);

     sections = ensure(sections, authors);

     sectionGroups = ensure(sectionGroups, sections);

     context.put("sectionGroups",sectionGroups);    

     context.put("sections",sections);    

     context.put("authors",authors);    

     context.put("books",books);    

     return "AllMessageboards.wm";

   }

   private Vector ensure(Vector a, Vector b) {

     for (Enumeration e = b.elements(); e.hasMoreElements();) {

       Unit u = (Unit)e.nextElement();

       if (!a.contains(u.getParentUnit())) { 

         a.add(u.getParentUnit());

       }

     }

     return a;

   }

   private Vector load(Enumeration e) {

     Vector v = new Vector();

     while (e.hasMoreElements()) {

       Unit u = (Unit)e.nextElement();

       if (u.getMessageboard() != null && u.getMessageboard().isActive()) {

         v.add(u);

       }

     }

     return v;

   }  

 }