/*
    * This software was designed and created by Jason Carroll.
    * Copyright (c) 2002, 2003, 2004 Jason Carroll.
    * The author can be reached at jcarroll@cowsultants.com
    * ITracker website: http://www.cowsultants.com
    * ITracker forums: http://www.cowsultants.com/phpBB/index.php
    *
    * This program is free software; you can redistribute it and/or modify
    * it only under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2 of the License, or
   * (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   */
  
  package org.itracker.web.actions.project;
  
  import java.io.File;
  import java.io.IOException;
  
  import javax.servlet.ServletException;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  import org.apache.log4j.Logger;
  import org.apache.struts.action.ActionForm;
  import org.apache.struts.action.ActionForward;
  import org.apache.struts.action.ActionMapping;
  import org.apache.struts.action.ActionMessage;
  import org.apache.struts.action.ActionMessages;
  import org.itracker.model.IssueAttachment;
  import org.itracker.services.ConfigurationService;
  import org.itracker.services.IssueService;
  import org.itracker.services.util.UserUtilities;
  import org.itracker.web.actions.base.ItrackerBaseAction;
  
  
  public class RemoveIssueAttachmentAction extends ItrackerBaseAction {
  	private static final Logger log = Logger.getLogger(RemoveIssueAttachmentAction.class);
  	
  
  
      public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  
      	ActionMessages errors = new ActionMessages();
  
          if(! hasPermission(UserUtilities.PERMISSION_USER_ADMIN, request, response)) {
              return mapping.findForward("unauthorized");
          }
  
          try {
              IssueService issueService = getITrackerServices().getIssueService();
              
              try {
                  Integer attachmentId = new Integer((request.getParameter("id") == null ? "-1" : request.getParameter("id")));
                  IssueAttachment attachment = issueService.getIssueAttachment(attachmentId);
  
                  if(attachment != null) {
                      ConfigurationService configurationService = getITrackerServices().getConfigurationService();
  
                      File attachmentFile = new File( configurationService.getProperty("attachment_dir") 
                          + File.separator + attachment.getFileName());
                      attachmentFile.delete();
  
                      issueService.removeIssueAttachment(attachmentId);
                  }
              } catch(NumberFormatException nfe) {
              	errors.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage("itracker.web.error.removeattachment"));
                  if(log.isDebugEnabled()) {
                      log.debug("Invalid attachmentId " + request.getParameter("id") + " specified.");
                  }
              }
          } catch(Exception e) {
          	errors.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage("itracker.web.error.system"));
          }
  
          if(! errors.isEmpty()) {
          	saveErrors(request, errors);
          }
          return mapping.findForward("listattachments");
      }
  
  }