/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. The ASF licenses this file to You
* under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License. For additional information regarding
* copyright in this work, please see the NOTICE file in the top level
* directory of this distribution.
*/
package org.apache.roller.weblogger.ui.rendering.pagers;
import java.sql.Timestamp;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.roller.weblogger.business.URLStrategy;
import org.apache.roller.weblogger.business.Weblogger;
import org.apache.roller.weblogger.business.WebloggerFactory;
import org.apache.roller.weblogger.business.WeblogEntryManager;
import org.apache.roller.weblogger.pojos.WeblogEntryComment;
import org.apache.roller.weblogger.pojos.Weblog;
import org.apache.roller.weblogger.pojos.wrapper.WeblogEntryCommentWrapper;
/**
* Paging through a collection of comments.
*/
public class CommentsPager extends AbstractPager {
private static Log log = LogFactory.getLog(CommentsPager.class);
private Weblog weblog = null;
private String locale = null;
private int sinceDays = -1;
private int length = 0;
// the collection for the pager
private List comments = null;
// are there more items?
private boolean more = false;
// most recent update time of current set of entries
private Date lastUpdated = null;
public CommentsPager(
URLStrategy strat,
String baseUrl,
Weblog weblog,
String locale,
int sinceDays,
int page,
int length) {
super(strat, baseUrl, page);
this.weblog = weblog;
this.locale = locale;
this.sinceDays = sinceDays;
this.length = length;
// initialize the collection
getItems();
}
public List getItems() {
if (comments == null) {
// calculate offset
int offset = getPage() * length;
List results = new ArrayList();
Date startDate = null;
if(sinceDays > 0) {
Calendar cal = Calendar.getInstance();
cal.setTime(new Date());
cal.add(Calendar.DATE, -1 * sinceDays);
startDate = cal.getTime();
}
try {
Weblogger roller = WebloggerFactory.getWeblogger();
WeblogEntryManager wmgr = roller.getWeblogEntryManager();
List entries = wmgr.getComments(
weblog, null, null, startDate, null, WeblogEntryComment.APPROVED, true, offset, length + 1);
// wrap the results
int count = 0;
for (Iterator it = entries.iterator(); it.hasNext();) {
WeblogEntryComment comment = (WeblogEntryComment) it.next();
if (count++ < length) {
results.add(WeblogEntryCommentWrapper.wrap(comment, urlStrategy));
} else {
more = true;
}
}
} catch (Exception e) {
log.error("ERROR: fetching comment list", e);
}
comments = results;
}
return comments;
}
public boolean hasMoreItems() {
return more;
}
/** Get last updated time from items in pager */
public Date getLastUpdated() {
if (lastUpdated == null) {
// feeds are sorted by pubtime, so first might not be last updated
List<WeblogEntryCommentWrapper> items = (List<WeblogEntryCommentWrapper>)getItems();
if (getItems() != null && getItems().size() > 0) {
Timestamp newest = ((WeblogEntryCommentWrapper)getItems().get(0)).getPostTime();
for (WeblogEntryCommentWrapper c : items) {
if (c.getPostTime().after(newest)) {
newest = c.getPostTime();
}
}
lastUpdated = new Date(newest.getTime());
} else {
// no update so we assume it's brand new
lastUpdated = new Date();
}
}
return lastUpdated;
}
}