/* 
    P/P   *  Method: net.sourceforge.pebble.web.action.BlogEntryToPdfAction__static_init
          * 
          *  Postconditions:
          *    init'ed(log)
          */
     1  /*
     2   * Copyright (c) 2003-2006, Simon Brown
     3   * All rights reserved.
     4   *
     5   * Redistribution and use in source and binary forms, with or without
     6   * modification, are permitted provided that the following conditions are met:
     7   *
     8   *   - Redistributions of source code must retain the above copyright
     9   *     notice, this list of conditions and the following disclaimer.
    10   *
    11   *   - Redistributions in binary form must reproduce the above copyright
    12   *     notice, this list of conditions and the following disclaimer in
    13   *     the documentation and/or other materials provided with the
    14   *     distribution.
    15   *
    16   *   - Neither the name of Pebble nor the names of its contributors may
    17   *     be used to endorse or promote products derived from this software
    18   *     without specific prior written permission.
    19   *
    20   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
    21   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    22   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    23   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
    24   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
    25   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
    26   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
    27   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
    28   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    29   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
    30   * POSSIBILITY OF SUCH DAMAGE.
    31   */
    32  package net.sourceforge.pebble.web.action;
    33  
    34  import net.sourceforge.pebble.Constants;
    35  
    36  import net.sourceforge.pebble.util.SecurityUtils;
    37  
    38  import net.sourceforge.pebble.domain.Blog;
    39  import net.sourceforge.pebble.domain.BlogEntry;
    40  import net.sourceforge.pebble.domain.BlogService;
    41  import net.sourceforge.pebble.domain.BlogServiceException;
    42  
    43  import net.sourceforge.pebble.web.view.NotFoundView;
    44  import net.sourceforge.pebble.web.view.PdfView;
    45  import net.sourceforge.pebble.web.view.View;
    46  
         /* 
    P/P   *  Method: void net.sourceforge.pebble.web.action.BlogEntryToPdfAction()
          */
    47  import javax.servlet.ServletException;
    48  import javax.servlet.http.HttpServletRequest;
    49  import javax.servlet.http.HttpServletResponse;
    50  
    51  import org.apache.commons.logging.Log;
    52  import org.apache.commons.logging.LogFactory;
    53  
    54  /**
    55   * Allows the user to export current blog entry as a PDF file.
    56   *
    57   * @author    Alexander Zagniotov
    58   */
    59  public class BlogEntryToPdfAction extends Action {
    60  
    61    private static final Log log = LogFactory.getLog(BlogEntryToPdfAction.class);
    62  
    63    /**
    64     * Peforms the processing associated with this action.
    65     *
    66     * @param request  the HttpServletRequest instance
    67     * @param response the HttpServletResponse instance
    68     * @return the name of the next view
    69     */
    70    public View process(HttpServletRequest request, HttpServletResponse response) throws ServletException {
             /* 
    P/P       *  Method: View process(HttpServletRequest, HttpServletResponse)
              * 
              *  Preconditions:
              *    request != null
              *    this.model != null
              *    this.model.data != null
              * 
              *  Postconditions:
              *    return_value in Addr_Set{&new PdfView(process#4),&new NotFoundView(process#3)}
              *    new NotFoundView(process#3) num objects <= 1
              *    new PdfView(process#4) num objects <= 1
              *    new PdfView(process#4).entry != null
              *    new PdfView(process#4).filename != null
              *    new PdfView(process#4).length == 0
              * 
              *  Test Vectors:
              *    javax.servlet.http.HttpServletRequest:getParameter(...)@72: Addr_Set{null}, Inverse{null}
              */
    71      Blog blog = (Blog)getModel().get(Constants.BLOG_KEY);
    72      String entryId = request.getParameter("entry");
    73  
    74      BlogEntry blogEntry = null;
    75      if (entryId != null) {
    76        BlogService service = new BlogService();
    77        try {
    78          blogEntry = service.getBlogEntry(blog, entryId);
    79        } catch (BlogServiceException e) {
    80          throw new ServletException(e);
    81        }
    82      }
    83  
    84  	if (blogEntry == null) {
    85        // the entry cannot be found - it may have been removed or the
    86        // requesting URL was wrong
    87        return new NotFoundView();
    88  
    89      } else {
    90        
    91  	  String filename = this.buildPermalink(blogEntry);
    92  	  return new PdfView(blogEntry, filename + ".pdf");
    93  
    94  	}
    95    }
    96  
           /* 
    P/P     *  Method: String buildPermalink(BlogEntry)
            * 
            *  Preconditions:
            *    blogEntry != null
            * 
            *  Postconditions:
            *    return_value != null
            * 
            *  Test Vectors:
            *    java.lang.String:length(...)@111: {1..232-1}, {0}
            *    java.lang.String:length(...)@99: {1..232-1}, {0}
            *    net.sourceforge.pebble.domain.BlogEntry:getTitle(...)@98: Addr_Set{null}, Inverse{null}
            */
    97    private String buildPermalink(BlogEntry blogEntry) {
    98      String title = blogEntry.getTitle();
    99      if (title == null || title.length() == 0) {
   100        title = "" + blogEntry.getId();
   101      } else {
   102        title = title.toLowerCase();
   103        title = title.replaceAll("[\\. ,;/\\\\-]", "_");
   104        title = title.replaceAll("[^a-z0-9_]", "");
   105        title = title.replaceAll("_+", "_");
   106        title = title.replaceAll("^_*", "");
   107        title = title.replaceAll("_*$", "");
   108      }
   109  
   110      // if the title has been blanked out, use the blog entry instead
+  111      if (title == null || title.length() == 0) {
   112        title = "" + blogEntry.getId();
   113      }
   114      return title;
   115    }
   116  }