/* 
    P/P   *  Method: net.sourceforge.pebble.web.action.UnsubscribeAction__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.domain.Blog;
    36  import net.sourceforge.pebble.util.StringUtils;
    37  import net.sourceforge.pebble.web.view.View;
    38  import net.sourceforge.pebble.web.view.impl.UnsubscribeView;
    39  import net.sourceforge.pebble.web.view.impl.UnsubscribedView;
    40  
         /* 
    P/P   *  Method: void net.sourceforge.pebble.web.action.UnsubscribeAction()
          */
    41  import javax.servlet.ServletException;
    42  import javax.servlet.http.HttpServletRequest;
    43  import javax.servlet.http.HttpServletResponse;
    44  import java.util.HashSet;
    45  import java.util.Set;
    46  
    47  /**
    48   * Allows the user to unsubscribe from e-mail updates whenever a blog entry
    49   * is added.
    50   *
    51   * @author    Simon Brown
    52   */
    53  public class UnsubscribeAction 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:
              *    emails.length@64 <= 232-1
              *    java.util.HashMap:get(...)@63 != null
              *    net.sourceforge.pebble.domain.Blog:getEmailSubscriptionList(...)@70 != null
              * 
              *  Postconditions:
              *    return_value in Addr_Set{&new UnsubscribeView(process#5),&new UnsubscribedView(process#4)}
              *    new UnsubscribeView(process#5) num objects <= 1
              *    new UnsubscribedView(process#4) num objects <= 1
              * 
              *  Test Vectors:
              *    java.util.Iterator:hasNext(...)@75: {1}, {0}
              *    javax.servlet.http.HttpServletRequest:getParameterValues(...)@64: Addr_Set{null}, Inverse{null}
              */
    63      Blog blog = (Blog)getModel().get(Constants.BLOG_KEY);
    64      String[] emails = request.getParameterValues("email");
    65  
    66      if (emails != null) {
    67        Set<String> emailSet = new HashSet<String>();
    68        for (String email : emails) {
    69          email = StringUtils.filterHTML(email);
    70          blog.getEmailSubscriptionList().removeEmailAddress(email);
    71          emailSet.add(email);
    72        }
    73  
    74        String emailListAsString = "";
    75        for (String email : emailSet) {
    76          emailListAsString += email;
    77          emailListAsString += " ";
    78        }
    79  
    80        getModel().put("email", emailListAsString);
    81        return new UnsubscribedView();
    82      }
    83  
    84      return new UnsubscribeView();
    85    }
    86  
    87  }