package org.paneris.bibliomania;
   
   /**
    * A TemplateContext utility. 
    * This is a utility object that is pretty widely used.
    * It provides shortcuts to frequently used functions.
    *
    * @see org.paneris.bibliomania.BibliomaniaDatabase
    */
  
  public class Bib {
    private BibliomaniaDatabase db;
  
    public Bib(BibliomaniaDatabase db) {
      this.db = db;
    }
  
    public BibliomaniaDatabase getDatabase() {
      return db;
    }
  
    /**
     * We need to add the extension as this is used in a 
     * template context so the TemplateEngine does not get a 
     * chance to add an extension.
     *   
     * @param name with path and extension
     * @return A name WebMacro can find in the CLASSPATH. 
     */
    public static String bibliomaniaTemplate(String name) {
      return BibliomaniaServlet.bibliomaniaTemplate(name) + ".wm";
    }
    /**
     * Return the URL for the root of the static content directory (set via
     * the `StaticRootURL' setting in the Settings table, generally
    `* /bibliomania-static').
     */
    public String getStaticRootURL() {
      return db.getStaticRootURL();
    }
  
    public String getContentStaticRootURL() {
      return db.getContentStaticRootURL();
    }
  
    public String getCacheRootURL() {
      return db.getCacheRootURL();
    }
  
    public String getHomepageURL() {
      return db.getHomepageURL();
    }
  
    /**
     * 
     * Access to static URLs defined here 
     * 
     */
  
    /**
     * Return the URL for the logo frame
     */
    public String getLogoURL() {
      return getStaticRootURL() + "/logo.html";
    }
  
    public String getFaqURL() {
      return getCacheRootURL() + "/Faq.html";
    }
  
    public String getCommentURL() {
      return "mailto:comments@boards.bibliomania.com";
    }
  
    public String getTrolleyURL() {
      return "/trolley";
    }
  
    public String urlPrefixedReally(
      String prefix,
      SectionGroup area,
      Section section,
      Unit object,
      Integer page) {
      if (object != null && object instanceof Chapter) {
        return addPage(
          urlDirectoryPrefixedReally(prefix, area, section, object),
          page)
          .toString();
      } else {
        return urlDirectoryPrefixedReally(prefix, area, section, object)
          .toString();
      }
  
    }
    public StringBuffer urlDirectoryPrefixedReally(
      String prefix,
      SectionGroup area,
      Section section,
     Unit object) {
 
     //Integer sectionid; 
     Integer authorid, bookid, chapterid;
 
     if (object == null) {
       //sectionid = null; 
       authorid = bookid = chapterid = null;
     } else {
       if (object instanceof Chapter) {
         Chapter chapter = (Chapter)object;
         Book book = chapter.getBook();
         chapterid = chapter.troid();
         bookid = book.troid();
         authorid = book.getAuthorTroid();
         section = book.getSection();
       } else if (object instanceof Book) {
         Book book = (Book)object;
         chapterid = null;
         bookid = book.troid();
         authorid = book.getAuthorTroid();
         section = book.getSection();
       } else if (object instanceof Author) {
         Author author = (Author)object;
         chapterid = null;
         bookid = null;
         authorid = author.troid();
         if (section == null)
           if ((section = author.getSection()) == null)
             section = db.getSectionTable().getSectionObject(0); // FIXME
       } else if (object instanceof Section) {
         chapterid = null;
         bookid = null;
         authorid = null;
         section = (Section)object;
       } else {
         chapterid = null;
         bookid = null;
         authorid = null;
         section = null;
         area = (SectionGroup)object;
       }
     }
 
     if (area == null)
       area = section != null ? section.getGroup() : db.getReadSectionGroup();
 
     StringBuffer it = new StringBuffer();
     it.append(prefix);
     it.append('/');
     if (area.getUrlprefix() != null) {
       it.append(area.getUrlprefix());
       it.append('/');
     }
     it.append(area.troid());
     if (section != null) {
       it.append('/');
       it.append(section.troid());
       if (authorid != null) {
         it.append('/');
         it.append(authorid);
         if (bookid != null) {
           it.append('/');
           it.append(bookid);
           if (chapterid != null) {
             it.append('/');
             it.append(chapterid);
           }
         }
       }
     }
     return it;
   }
 
   private StringBuffer addPage(StringBuffer url, Integer page) {
     url.append('/');
     if (page == null) {
       url.append(1);
     } else {
       url.append(page.intValue());
     }
     url.append(".html");
     return url;
   }
 
   public String urlPrefixed(
     String prefix,
     SectionGroup area,
     Section section,
     Unit object,
     Integer page) {
     if (object != null && object instanceof Book) {
       Book book = (Book)object;
       Boolean hnfp = book.getHasnofrontpage();
       if (hnfp != null && hnfp.booleanValue())
         object = book.getChapter0();
     }
 
     return urlPrefixedReally(prefix, area, section, object, page);
   }
 
   public String url(
     SectionGroup area,
     Section section,
     Unit object,
     Integer page) {
     return urlPrefixed(
       ((BibliomaniaDatabase)object.getDatabase()).getCacheRootURL(),
       area,
       section,
       object,
       page);
   }
 
   /**
    * 
    * Given a SectionGroup and any Unit
    * return the url for that Unit within this 
    * SectionGroup
    * 
    */
   public String url(SectionGroup area, Unit object) {
     return url(area, null, object, null);
   }
 
   public String url(Chapter object, Integer page) {
     return url(null, null, object, page);
   }
 
   /**
    * 
    * Given a chapter and page return the url
    * 
    */
   public String url(Chapter object, String page) {
     return url(null, null, object, new Integer(page));
   }
 
   /**
    * 
    * Given any object return its url
    * 
    */
   public String url(Unit object) {
     return url(null, object);
   }
 
   /**
    * 
    * Given any object return its frameset url
    * 
    */
   // FIXME hack, this naming policy needs to be centrally organised
   public String framesetURL(Unit object) {
 
     String url = url(object);
     if (url.endsWith(".html"))
       url = url.substring(0, url.length() - 5);
 
     return url + "/frameset.html";
   }
 
   /**
    * 
    * Given a chapter and page return 
    * the frameset url
    * 
    */
   public String framesetURL(Chapter chapter, String page) {
 
     String url = url(chapter, page);
     if (url.endsWith(".html"))
       url = url.substring(0, url.length() - 5);
 
     return url + "/frameset.html";
   }
 
   // FIXME I don't think this is used
   public String urlReally(Unit object) {
     return urlPrefixedReally(
       ((BibliomaniaDatabase)object.getDatabase()).getCacheRootURL(),
       null,
       null,
       object,
       null);
   }
 
   /**
    * 
    * Given a Book id return the book
    * 
    */
   public Book book(Integer troid) {
     return (Book)db.getBookTable().getObject(troid);
   }
 
   /**
    * Given a chapter and an anchor 
    * return an anchor url.
    * 
    */
 
   public String anchorURL(Chapter chapter, String anchor) {
     Integer page = chapter.pageOfAnchor(anchor);
     return page == null
       ? url(null, chapter)
       : url(null, null, chapter, page) + "#" + anchor;
   }
 
   /**
    * Walk up the content hierarchy until Book level is reached.  I.e.,
    * return the book from which a chapter comes, or the object itself if it
    * is a book, author, section or sectiongroup.
    */
 
   public Unit atMostBook(Unit object) {
     return object instanceof Chapter ? ((Chapter)object).getBook() : object;
   }
 
   /**
    * Walk up the content hierarchy until Author level is reached.  I.e.,
    * return the author of a book or chapter, or the object itself if it is
    * an author, section or sectiongroup.
    */
   public Unit atMostAuthor(Unit object) {
     return object instanceof Chapter
       ? ((Chapter)object).getBook().getAuthor()
       : object instanceof Book
       ? ((Book)object).getAuthor()
       : object;
   }
 }