/*
* The contents of this file are subject to the Mozilla Public License Version 1.1
* (the "License"); you may not use this file except in compliance with the License.
* You may obtain a copy of the License at .
*
* Software distributed under the License is distributed on an "AS IS" basis, WITHOUT
* WARRANTY OF ANY KIND, either express or implied. See the License for the specific
* language governing rights and limitations under the License.
*
* The Original Code is the Venice Web Communities System.
*
* The Initial Developer of the Original Code is Eric J. Bowersox ,
* for Silverwrist Design Studios. Portions created by Eric J. Bowersox are
* Copyright (C) 2001 Eric J. Bowersox/Silverwrist Design Studios. All Rights Reserved.
*
* Contributor(s):
*/
package com.silverwrist.venice.servlets.format;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
import com.silverwrist.util.StringUtil;
import com.silverwrist.venice.core.*;
public class TopicPosts implements JSPRender
{
/*--------------------------------------------------------------------------------
* Static data members
*--------------------------------------------------------------------------------
*/
// Attribute name for request attribute
protected static final String ATTR_NAME = "com.silverwrist.venice.content.TopicPosts";
/*--------------------------------------------------------------------------------
* Attributes
*--------------------------------------------------------------------------------
*/
private VeniceEngine engine;
private SIGContext sig;
private ConferenceContext conf;
private TopicContext topic;
private int first;
private int last;
private boolean show_advanced;
private int unread;
private List messages;
private TopicVisitOrder visit_order;
private String topic_stem;
private String cache_locator = null;
/*--------------------------------------------------------------------------------
* Constructor
*--------------------------------------------------------------------------------
*/
public TopicPosts(HttpServletRequest request, VeniceEngine engine, SIGContext sig, ConferenceContext conf,
TopicContext topic, int first, int last, boolean read_new, boolean show_advanced)
throws DataException, AccessError
{
this.engine = engine;
this.sig = sig;
this.conf = conf;
this.topic = topic;
this.first = first;
this.last = last;
this.show_advanced = show_advanced;
this.unread = topic.getUnreadMessages();
if (read_new)
topic.setUnreadMessages(0);
this.messages = topic.getMessages(first,last);
this.visit_order = TopicVisitOrder.retrieve(request.getSession(true),conf.getConfID());
visit_order.visit(topic.getTopicNumber());
List aliases = conf.getAliases();
topic_stem = (String)(aliases.get(0)) + "." + String.valueOf(topic.getTopicNumber()) + ".";
} // end constructor
/*--------------------------------------------------------------------------------
* External static functions
*--------------------------------------------------------------------------------
*/
public static TopicPosts retrieve(ServletRequest request)
{
return (TopicPosts)(request.getAttribute(ATTR_NAME));
} // end retrieve
/*--------------------------------------------------------------------------------
* Implementations from interface VeniceContent
*--------------------------------------------------------------------------------
*/
public String getPageTitle(RenderData rdat)
{
return topic.getName() + ": " + topic.getTotalMessages() + " Total; " + unread + " New; Last: "
+ rdat.formatDateForDisplay(topic.getLastUpdateDate());
} // end getPageTitle
/*--------------------------------------------------------------------------------
* Implementations from interface JSPRender
*--------------------------------------------------------------------------------
*/
public void store(ServletRequest request)
{
request.setAttribute(ATTR_NAME,this);
} // end store
public String getTargetJSPName()
{
return "posts.jsp";
} // end getTargetJSPName
/*--------------------------------------------------------------------------------
* External operations
*--------------------------------------------------------------------------------
*/
public static String getPosterName(TopicMessageContext msg)
{
try
{ // have to guard agains a DataException here
return msg.getCreatorName();
} // end try
catch (DataException de)
{ // just return "unknown" on failure
return "(unknown)";
} // end catch
} // end getPosterName
public static String getMessageBodyText(TopicMessageContext msg)
{
try
{ // have to guard against a DataException here
return msg.getBodyText();
} // end try
catch (DataException de)
{ // just return an error message
return "(Unable to retrieve message data: " + StringUtil.encodeHTML(de.getMessage()) + ")";
} // end catch
} // end getMessageBodyText
public int getSIGID()
{
return sig.getSIGID();
} // end getSIGID
public int getConfID()
{
return conf.getConfID();
} // end getConfID
public int getTopicNumber()
{
return topic.getTopicNumber();
} // end getTopicNumber
public int getNextTopicNumber()
{
return visit_order.getNext();
} // end getNextTopicNumber
public String getConfLocator()
{
StringBuffer buf = new StringBuffer("sig=");
buf.append(sig.getSIGID()).append("&conf=").append(conf.getConfID());
return buf.toString();
} // end getConfLocator
public String getLocator()
{
if (cache_locator==null)
{ // build up the standard locator
StringBuffer buf = new StringBuffer("sig=");
buf.append(sig.getSIGID()).append("&conf=").append(conf.getConfID()).append("&top=");
buf.append(topic.getTopicNumber());
cache_locator = buf.toString();
} // end if
return cache_locator;
} // end getLocator
public String getNextLocator()
{
StringBuffer buf = new StringBuffer("sig=");
buf.append(sig.getSIGID()).append("&conf=").append(conf.getConfID()).append("&top=");
buf.append(visit_order.getNext());
return buf.toString();
} // end getNextLocator
public String getRestoreLocator()
{
StringBuffer buf = new StringBuffer("rtop=");
buf.append(topic.getTopicNumber()).append("&rct=").append(unread);
return buf.toString();
} // end getRestoreLocator
public String getIdentifyingData()
{
StringBuffer buf = new StringBuffer("Posts ");
buf.append(first).append(" through ").append(last).append(" in topic #").append(topic.getTopicID());
return buf.toString();
} // end getIdentifyingData
public String getTopicName()
{
return topic.getName();
} // end getTopicName
public int getTotalMessages()
{
return topic.getTotalMessages();
} // end getTotalMessages
public int getNewMessages()
{
return unread;
} // end getNewMessages
public Date getLastUpdate()
{
return topic.getLastUpdateDate();
} // end getLastUpdate
public boolean isTopicHidden()
{
return topic.isHidden();
} // end isTopicHidden
public boolean canDoNextTopic()
{
return visit_order.isNext();
} // end canDoNextTopic
public boolean canFreezeTopic()
{
return topic.canFreeze();
} // end canFreezeTopic
public boolean isTopicFrozen()
{
return topic.isFrozen();
} // end isTopicFrozen
public boolean canArchiveTopic()
{
return topic.canArchive();
} // end canArchiveTopic
public boolean isTopicArchived()
{
return topic.isArchived();
} // end isTopicArchived
public boolean canDeleteTopic()
{
return topic.canDelete();
} // end canDeleteTopic
public boolean canScrollUp()
{
return (first>0);
} // end canScrollUp
public String getScrollUpLocator()
{
int new_first = first - engine.getNumPostsPerPage();
int new_last = last - 1;
if (new_first<0)
{ // normalize so we start at 0
new_last += (-new_first);
new_first = 0;
} // end if
StringBuffer buf = new StringBuffer("p1=");
buf.append(new_first).append("&p2=").append(new_last);
return buf.toString();
} // end getScrollUpLocator
public boolean canScrollDown()
{
return ((topic.getTotalMessages() - (1 + last))>=engine.getNumPostsPerPage());
} // end canScrollDown
public String getScrollDownLocator()
{
StringBuffer buf = new StringBuffer("p1=");
buf.append(last+1).append("&p2=").append(last+engine.getNumPostsPerPage());
return buf.toString();
} // end getScrollDownLocator
public boolean canScrollToEnd()
{
return ((topic.getTotalMessages() - (1 + last))>0);
} // end canScrollToEnd
public String getScrollToEndLocator()
{
int my_last = topic.getTotalMessages();
StringBuffer buf = new StringBuffer("p1=");
buf.append(my_last-engine.getNumPostsPerPage()).append("&p2=").append(my_last-1);
return buf.toString();
} // end getScrollToEndLocator
public Iterator getMessageIterator()
{
return messages.iterator();
} // end getMessageIterator()
public boolean emitBreakLinePoint(int msg)
{
return (msg==(topic.getTotalMessages()-unread));
} // end emitBreakLinePoint
public boolean showAdvanced()
{
return show_advanced && (last==first);
} // end showAdvanced
public boolean displayPostBox()
{
boolean flag1 = conf.canPostToConference();
boolean flag2 = (topic.isFrozen() ? topic.canFreeze() : true);
boolean flag3 = (topic.isArchived() ? topic.canArchive() : true);
return flag1 && flag2 && flag3;
} // end displayPostBox
public String getDefaultPseud()
{
return conf.getDefaultPseud();
} // end getDefaultPseud
public String getMessageReference(TopicMessageContext msg)
{
return topic_stem + String.valueOf(msg.getPostNumber());
} // end getMessageReference
public int getNumPostsPerPage()
{
return engine.getNumPostsPerPage();
} // end getNumPostsPerPage
} // end class TopicPosts