/*
* Copyright (C) 2010-2011 Geometer Plus <contact@geometerplus.com>
*
* This program is free software; you can redistribute it and/or modify
* it 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
package org.geometerplus.fbreader.network.opds;
import java.io.IOException;
import java.io.InputStream;
import java.net.URLConnection;
import java.util.*;
import org.geometerplus.zlibrary.core.network.ZLNetworkManager;
import org.geometerplus.zlibrary.core.network.ZLNetworkException;
import org.geometerplus.zlibrary.core.network.ZLNetworkRequest;
import org.geometerplus.zlibrary.core.util.ZLMiscUtil;
import org.geometerplus.fbreader.network.ICustomNetworkLink;
import org.geometerplus.fbreader.network.INetworkLink;
import org.geometerplus.fbreader.network.NetworkException;
import org.geometerplus.fbreader.network.UrlInfo;
public class OPDSCustomLink extends OPDSNetworkLink implements ICustomNetworkLink {
private int myId;
private boolean myHasChanges;
private static String removeWWWPrefix(String siteName) {
if (siteName != null && siteName.startsWith("www.")) {
return siteName.substring(4);
}
return siteName;
}
public OPDSCustomLink(int id, String siteName, String title, String summary, Map<String,UrlInfo> infos) {
super(removeWWWPrefix(siteName), title, summary, null, infos, false);
myId = id;
}
public int getId() {
return myId;
}
public void setId(int id) {
myId = id;
}
public boolean hasChanges() {
return myHasChanges;
}
public void resetChanges() {
myHasChanges = false;
}
public final void setSiteName(String name) {
myHasChanges = myHasChanges || !ZLMiscUtil.equals(mySiteName, name);
mySiteName = name;
}
public final void setSummary(String summary) {
myHasChanges = myHasChanges || !ZLMiscUtil.equals(mySummary, summary);
mySummary = summary;
}
public final void setTitle(String title) {
myHasChanges = myHasChanges || !ZLMiscUtil.equals(myTitle, title);
myTitle = title;
}
public final void setUrl(String urlKey, String url) {
myInfos.put(urlKey, new UrlInfo(url, new Date()));
myHasChanges = true;
}
public final void removeUrl(String urlKey) {
final UrlInfo oldUrl = myInfos.remove(urlKey);
myHasChanges = myHasChanges || oldUrl != null;
}
public boolean isObsolete(long milliSeconds) {
final long old = System.currentTimeMillis() - milliSeconds;
final Date searchUpdateDate = getUrlInfo(URL_SEARCH).Updated;
if (searchUpdateDate == null || searchUpdateDate.getTime() < old) {
return true;
}
final Date iconUpdateDate = getUrlInfo(URL_ICON).Updated;
if (iconUpdateDate == null || iconUpdateDate.getTime() < old) {
return true;
}
return false;
}
public void reloadInfo(final boolean urlsOnly) throws ZLNetworkException {
final LinkedList<String> opensearchDescriptionURLs = new LinkedList<String>();
final List<OpenSearchDescription> descriptions = Collections.synchronizedList(new LinkedList<OpenSearchDescription>());
ZLNetworkException error = null;
try {
ZLNetworkManager.Instance().perform(new ZLNetworkRequest(getUrlInfo(URL_MAIN).URL) {
@Override
public void handleStream(URLConnection connection, InputStream inputStream) throws IOException, ZLNetworkException {
final CatalogInfoReader info = new CatalogInfoReader(URL, OPDSCustomLink.this, opensearchDescriptionURLs);
new OPDSXMLReader(info).read(inputStream);
if (!info.FeedStarted) {
throw new ZLNetworkException(NetworkException.ERROR_NOT_AN_OPDS);
}
if (info.Title == null) {
throw new ZLNetworkException(NetworkException.ERROR_NO_REQUIRED_INFORMATION);
}
setUrl(URL_ICON, info.Icon);
if (info.DirectOpenSearchDescription != null) {
descriptions.add(info.DirectOpenSearchDescription);
}
if (!urlsOnly) {
myTitle = info.Title;
mySummary = info.Summary;
}
}
});
} catch (ZLNetworkException e) {
error = e;
}
// TODO: Use ALL available descriptions and not only Direct
if (descriptions.isEmpty() && !opensearchDescriptionURLs.isEmpty()) {
LinkedList<ZLNetworkRequest> requests = new LinkedList<ZLNetworkRequest>();
for (String url: opensearchDescriptionURLs) {
requests.add(new ZLNetworkRequest(url) {
@Override
public void handleStream(URLConnection connection, InputStream inputStream) throws IOException, ZLNetworkException {
new OpenSearchXMLReader(URL, descriptions).read(inputStream);
}
});
}
try {
ZLNetworkManager.Instance().perform(requests);
} catch (ZLNetworkException e) {
if (error == null) {
error = e;
}
}
}
if (!descriptions.isEmpty()) {
// TODO: May be do not use '%s'??? Use Description instead??? (this needs to rewrite SEARCH engine logic a little)
setUrl(URL_SEARCH, descriptions.get(0).makeQuery("%s"));
} else {
setUrl(URL_SEARCH, null);
}
if (error != null) {
throw error;
}
}
}