/*
*
* Copyright 2013 Entando S.r.l. (http://www.entando.com) All rights reserved.
*
* This file is part of Entando software.
* Entando is a free software;
* You can redistribute it and/or modify it
* under the terms of the GNU General Public License (GPL) as published by the Free Software Foundation; version 2.
*
* See the file License for the specific language governing permissions
* and limitations under the License
*
*
*
* Copyright 2013 Entando S.r.l. (http://www.entando.com) All rights reserved.
*
*/
package com.agiletec.plugins.jprssaggregator.aps.system.services.converter;
import java.io.Reader;
import java.io.StringReader;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.input.SAXBuilder;
import com.agiletec.aps.system.ApsSystemUtils;
import com.agiletec.aps.system.common.AbstractService;
import com.agiletec.aps.system.common.entity.model.EntitySearchFilter;
import com.agiletec.aps.system.exception.ApsSystemException;
import com.agiletec.aps.system.services.baseconfig.ConfigInterface;
import com.agiletec.aps.system.services.lang.ILangManager;
import com.agiletec.plugins.jacms.aps.system.services.content.IContentManager;
import com.agiletec.plugins.jacms.aps.system.services.content.model.Content;
import com.agiletec.plugins.jprssaggregator.aps.system.services.aggregator.ApsAggregatorItem;
import com.sun.syndication.feed.synd.SyndEntryImpl;
import com.sun.syndication.feed.synd.SyndFeed;
import com.sun.syndication.feed.synd.SyndFeedImpl;
import com.sun.syndication.fetcher.FeedFetcher;
import com.sun.syndication.fetcher.impl.FeedFetcherCache;
import com.sun.syndication.fetcher.impl.HashMapFeedInfoCache;
import com.sun.syndication.fetcher.impl.HttpURLFeedFetcher;
/**
* This service builds {@link Content} objects from a feed.
*/
public class RssConverterManager extends AbstractService implements IRssConverterManager {
@Override
public void init() throws Exception {
this.loadMappingMap();
ApsSystemUtils.getLogger().debug(this.getClass().getName() + " is ready");
}
@SuppressWarnings("unchecked")
protected void loadMappingMap() throws ApsSystemException {
try {
String xml = this.getConfigInterface().getConfigItem(IRssConverterManager.CONFIG_ITEM);
if (xml == null) {
throw new ApsSystemException("The config item: " + IRssConverterManager.CONFIG_ITEM + " is not present.");
}
Document doc = this.getDocument(xml);
Element root = doc.getRootElement();
List<Element> elements = root.getChildren();
Iterator<Element> it = elements.iterator();
while (it.hasNext()) {
Element currentElement = it.next();
String key = currentElement.getAttributeValue("contentType");
this.getMappingMap().put(key, new AggregatorConfig(currentElement));
}
} catch (Throwable t) {
ApsSystemUtils.logThrowable(t, this, "loadMappingMap");
throw new ApsSystemException("An error occurred loading configuration", t);
}
}
@Override
public Set<String> getMappings() {
return this.getMappingMap().keySet();
}
private Document getDocument(String xmlText) throws ApsSystemException {
Document doc = null;
try {
SAXBuilder saxBuilder = new SAXBuilder(false);
Reader stringReader = new StringReader(xmlText);
doc = saxBuilder.build(stringReader);
} catch (Throwable t) {
ApsSystemUtils.logThrowable(t, this, "getDocument");
throw new ApsSystemException ("error parsing the configuration", t);
}
return doc;
}
public AggregatorConfig getAggregatorConfig(String contentType) {
return this.getMappingMap().get(contentType);
}
@Override
public List<Content> getContents(ApsAggregatorItem item) throws ApsSystemException {
List<Content> contents = new ArrayList<Content>();
AggregatorConfig aggregatorConfig = this.getMappingMap().get(item.getContentType());
try {
List<SyndEntryImpl> entries = this.getRssEntries(IRssConverterManager.RSS_2_0, item.getLink());
if(null == entries) return contents;
Iterator<SyndEntryImpl> entriesIt = entries.iterator();
String linkAttributeName = aggregatorConfig.getLinkAttributeName();// this.getLinkAttributeName(typeCode);
while (entriesIt.hasNext()) {
SyndEntryImpl feedItem = entriesIt.next();
String link = feedItem.getLink();
Content content = this.getExistingContent(link, linkAttributeName, item.getContentType());
if (null == content) {
String typeCode = aggregatorConfig.getContentType();
content = this.getContentManager().createContentType(typeCode);
}
this.getContentBuilder().populateContentFromMapping(content, feedItem, item, this.getMappingMap().get(aggregatorConfig.getContentType()));
contents.add(content);
}
} catch (Throwable t) {
ApsSystemUtils.logThrowable(t, this, "getContents");
throw new ApsSystemException("errore in conversione lista feed", t);
}
return contents;
}
@SuppressWarnings("unchecked")
@Override
public List<SyndEntryImpl> getRssEntries(String feedType, String url) throws ApsSystemException {
SyndFeed feed = null;
try {
feed = new SyndFeedImpl();
String outputType = feedType;
feed.setFeedType(outputType);
feed.setTitle("jAPS Aggregated Feed");
feed.setDescription("jAPS Aggregated Feed");
feed.setAuthor("jAPS");
feed.setLink("www.japsportal.org");
List<SyndFeed> entries = new ArrayList<SyndFeed>();
feed.setEntries(entries);
SyndFeed inFeed = this.retrieveFeed(url);
if (null == inFeed) return null;
entries.addAll(inFeed.getEntries());
} catch (Throwable t) {
throw new ApsSystemException ("error in getRssEntries",t);
}
return feed.getEntries();
}
private SyndFeed retrieveFeed(String url) {
SyndFeed inFeed = null;
try {
FeedFetcherCache feedInfoCache = HashMapFeedInfoCache.getInstance();
FeedFetcher feedFetcher = new HttpURLFeedFetcher(feedInfoCache);
URL inputUrl = new URL(url);
inFeed = feedFetcher.retrieveFeed(inputUrl);
} catch (Throwable t) {
ApsSystemUtils.logThrowable(t, this, "error in retrieveFeed with url: " + url);
}
return inFeed;
}
private Content getExistingContent(String link, String linkAttributeName, String contentType) throws ApsSystemException {
Content content = null;
try {
EntitySearchFilter linkFilter = new EntitySearchFilter(linkAttributeName, true, link, false);
linkFilter.setLangCode(this.getDefaultLangCode());
EntitySearchFilter typeCodeFilter = new EntitySearchFilter(IContentManager.ENTITY_TYPE_CODE_FILTER_KEY, false, contentType, false);
EntitySearchFilter[] filters = new EntitySearchFilter[]{linkFilter, typeCodeFilter};
List<String> searchContents = this.getContentManager().searchId(filters);
if (null != searchContents && searchContents.size() > 0) {
String contentId = (String) searchContents.get(0);
content = this.getContentManager().loadContent(contentId, true);
}
} catch (Throwable t) {
throw new ApsSystemException("error in getExistingContent", t);
}
return content;
}
private String getDefaultLangCode() {
return this.getLangManager().getDefaultLang().getCode();
}
public void setMappingMap(Map<String, AggregatorConfig> mappingMap) {
this._mappingMap = mappingMap;
}
public Map<String, AggregatorConfig> getMappingMap() {
return _mappingMap;
}
public void setLangManager(ILangManager langManager) {
this._langManager = langManager;
}
protected ILangManager getLangManager() {
return _langManager;
}
public void setContentManager(IContentManager contentManager) {
this._contentManager = contentManager;
}
protected IContentManager getContentManager() {
return _contentManager;
}
public void setConfigInterface(ConfigInterface configInterface) {
this._configInterface = configInterface;
}
protected ConfigInterface getConfigInterface() {
return _configInterface;
}
public void setContentBuilder(ContentBuilder contentBuilder) {
this._contentBuilder = contentBuilder;
}
protected ContentBuilder getContentBuilder() {
return _contentBuilder;
}
private Map<String, AggregatorConfig> _mappingMap = new HashMap<String, AggregatorConfig>();
private ConfigInterface _configInterface;
private ILangManager _langManager;
private IContentManager _contentManager;
private ContentBuilder _contentBuilder;
}