/* 
    P/P   *  Method: net.sourceforge.pebble.web.action.ViewMonthAction__static_init
          */
     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  import net.sourceforge.pebble.util.SecurityUtils;
    36  import net.sourceforge.pebble.domain.*;
    37  import net.sourceforge.pebble.web.view.View;
    38  import net.sourceforge.pebble.web.view.NotFoundView;
    39  import net.sourceforge.pebble.web.view.impl.BlogEntriesByMonthView;
    40  
         /* 
    P/P   *  Method: void net.sourceforge.pebble.web.action.ViewMonthAction()
          */
    41  import javax.servlet.ServletException;
    42  import javax.servlet.http.HttpServletRequest;
    43  import javax.servlet.http.HttpServletResponse;
    44  import java.util.List;
    45  import java.util.ArrayList;
    46  
    47  /**
    48   * Finds all blog entries for a particular month, ready for them
    49   * to be displayed.
    50   *
    51   * @author    Simon Brown
    52   */
    53  public class ViewMonthAction extends Action {
    54  
    55    /**
    56     * Peforms the processing associated with this action.
    57     *
    58     * @param request  the HttpServletRequest instance
    59     * @param response the HttpServletResponse instance
    60     * @return the name of the next view
    61     */
    62    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
              * 
              *  Presumptions:
              *    java.util.HashMap:get(...)@63 != null
              *    net.sourceforge.pebble.domain.Blog:getBlogForMonth(...)@70 != null
              *    net.sourceforge.pebble.domain.Blog:getCalendar(...)@96 != null
              *    net.sourceforge.pebble.domain.BlogService:getBlogEntries(...)@79 != null
              *    net.sourceforge.pebble.domain.Month:getDate(...)@96 != null
              *    ...
              * 
              *  Postconditions:
              *    return_value in Addr_Set{&new BlogEntriesByMonthView(process#4),&new NotFoundView(process#1)}
              *    new BlogEntriesByMonthView(process#4) num objects <= 1
              *    new NotFoundView(process#1) num objects <= 1
              * 
              *  Test Vectors:
              *    java.lang.String:length(...)@68: {0}, {1..232-1}
              *    java.lang.String:length(...)@69: {0}, {1..232-1}
              *    java.util.Date:after(...)@96: {0}, {1}
              *    javax.servlet.http.HttpServletRequest:getParameter(...)@63: Addr_Set{null}, Inverse{null}
              *    javax.servlet.http.HttpServletRequest:getParameter(...)@64: Addr_Set{null}, Inverse{null}
              *    net.sourceforge.pebble.domain.Month:before(...)@92: {1}, {0}
              *    net.sourceforge.pebble.domain.Month:before(...)@96: {0}, {1}
              */
    63      String year = request.getParameter("year");
    64      String month = request.getParameter("month");
    65  
    66      Blog blog = (Blog)getModel().get(Constants.BLOG_KEY);
    67      Month monthly;
    68      if (year != null && year.length() > 0 &&
    69          month != null && month.length() > 0) {
    70        monthly = blog.getBlogForMonth(Integer.parseInt(year), Integer.parseInt(month));
    71      } else {
    72        return new NotFoundView();
    73      }
    74  
    75      BlogService service = new BlogService();
    76  
    77      List<BlogEntry> blogEntries = null;
    78      try {
    79        blogEntries = service.getBlogEntries(blog, Integer.parseInt(year), Integer.parseInt(month));
    80      } catch (BlogServiceException e) {
    81        throw new ServletException(e);
    82      }
    83      getModel().put(Constants.BLOG_ENTRIES, filter(blog, blogEntries));
    84      getModel().put("displayMode", "month");
    85      getModel().put(Constants.MONTHLY_BLOG, monthly);
    86  
    87      // put the previous and next months in the model for navigation purposes
    88      Month firstMonth = blog.getBlogForFirstMonth();
    89      Month previousMonth = monthly.getPreviousMonth();
    90      Month nextMonth = monthly.getNextMonth();
    91  
    92      if (!previousMonth.before(firstMonth)) {
    93        getModel().put("previousMonth", previousMonth);
    94      }
    95  
    96      if (!nextMonth.getDate().after(blog.getCalendar().getTime()) || nextMonth.before(firstMonth)) {
    97        getModel().put("nextMonth", nextMonth);
    98      }
    99  
   100      return new BlogEntriesByMonthView();
   101    }
   102  
           /* 
    P/P     *  Method: List filter(Blog, List)
            * 
            *  Preconditions:
            *    blogEntries != null
            *    (soft) blog != null
            * 
            *  Presumptions:
            *    java.util.Iterator:next(...)@106 != null
            * 
            *  Postconditions:
            *    return_value == &new ArrayList(filter#1)
            *    new ArrayList(filter#1) num objects == 1
            * 
            *  Test Vectors:
            *    java.util.Iterator:hasNext(...)@106: {1}, {0}
            *    net.sourceforge.pebble.domain.BlogEntry:isPublished(...)@108: {1}, {0}
            *    net.sourceforge.pebble.domain.BlogEntry:isUnpublished(...)@110: {0}, {1}
            */
   103    private List<BlogEntry> filter(Blog blog, List<BlogEntry> blogEntries) {
   104      List<BlogEntry> filtered = new ArrayList<BlogEntry>();
   105  
   106      for (BlogEntry blogEntry : blogEntries) {
   107        if (
   108            blogEntry.isPublished() ||
   109            (
   110              (SecurityUtils.isUserAuthorisedForBlog(blog) && blogEntry.isUnpublished())
   111            )
   112           ) {
   113          filtered.add(blogEntry);
   114        }
   115      }
   116  
   117      return filtered;
   118    }
   119  
   120  }