org.mycore.frontend.basket.MCRBasketServlet Maven / Gradle / Ivy
/*
* This file is part of *** M y C o R e ***
* See http://www.mycore.de/ for details.
*
* MyCoRe 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 3 of the License, or
* (at your option) any later version.
*
* MyCoRe 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 MyCoRe. If not, see .
*/
package org.mycore.frontend.basket;
import java.net.URL;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.jdom2.Document;
import org.mycore.common.MCRException;
import org.mycore.common.content.MCRJDOMContent;
import org.mycore.datamodel.metadata.MCRObjectID;
import org.mycore.frontend.servlets.MCRServlet;
import org.mycore.frontend.servlets.MCRServletJob;
/**
* Provides the web front end to manage baskets and their contents.
* Required parameter is the type of basket and the action to perform.
* For a basket of objects, possible requests would be:
*
* BasketServlet?type=objects&action=show
* to output the contents of the objects basket using basket-{type}.xsl
* BasketServlet?type=objects&action=clear
* to remove all entries in the objects basket.
* BasketServlet?type=objects&action=add&id=DocPortal_document_00774301&uri=mcrobject:DocPortal_document_00774301
* to add a new entry with ID DocPortal_document_00774301 to the basket,
* reading its contents from URI mcrobject:DocPortal_document_00774301
* BasketServlet?type=objects&action=add&id=DocPortal_document_00774301&uri=mcrobject:DocPortal_document_00774301&resolve=true
* to add a new entry with ID DocPortal_document_00774301 to the basket,
* immediately resolving content from the given URI.
* BasketServlet?type=objects&action=remove&id=DocPortal_document_00774301
* to remove the entry with ID DocPortal_document_00774301 from the basket
* BasketServlet?type=objects&action=up&id=DocPortal_document_00774301
* to move the entry with ID DocPortal_document_00774301 one position up in the basket
* BasketServlet?type=objects&action=down&id=DocPortal_document_00774301
* to move the entry with ID DocPortal_document_00774301 one position down in the basket
* BasketServlet?type=objects&action=comment&id=DocPortal_document_00774301
* to change the comment stored in the basket. This is called
* using EditorServlet submission, see basket-edit.xml for an example.
* BasketServlet?type=objects&action=create&ownerID=DocPortal_basket_01234567
* to store a basket in a new file "basket" in a new derivate that is owned by the metadata object
* with the given ownerID.
* BasketServlet?type=objects&action=update
* to update a persistent basket in its derivate - that is the derivate the basket was loaded from.
* BasketServlet?action=retrieve&derivateID=DocPortal_derivate_12345678
* to retrieve a basket's data from a file "basket.xml" in the given derivate into the current user's session.
*
* @author Frank L\u00fctzenkirchen
**/
public class MCRBasketServlet extends MCRServlet {
private static final Logger LOGGER = LogManager.getLogger(MCRBasketServlet.class);
public void doGetPost(MCRServletJob job) throws Exception {
HttpServletRequest req = job.getRequest();
HttpServletResponse res = job.getResponse();
String type = req.getParameter("type");
String action = req.getParameter("action");
String[] uris = req.getParameterValues("uri");
String[] ids = req.getParameterValues("id");
String redirect = getProperty(req, "redirect");
URL referer = getReferer(req);
boolean resolveContent = "true".equals(req.getParameter("resolve"));
LOGGER.info("{} {} {}", action, type, ids == null ? "" : ids);
MCRBasket basket = MCRBasketManager.getOrCreateBasketInSession(type);
if ("add".equals(action)) {
if (uris.length != ids.length) {
throw new MCRException("Amount of URIs must match amount of IDs");
}
for (int i = 0; i < uris.length; i++) {
MCRBasketEntry entry = new MCRBasketEntry(ids[i], uris[i]);
basket.add(entry);
if (resolveContent) {
entry.resolveContent();
}
}
} else if ("remove".equals(action)) {
for (String id : ids) {
basket.removeEntry(id);
}
} else if ("up".equals(action)) {
for (String id : ids) {
basket.up(basket.get(id));
}
} else if ("down".equals(action)) {
for (String id : ids) {
basket.down(basket.get(id));
}
} else if ("clear".equals(action)) {
basket.clear();
} else if ("create".equals(action)) {
String ownerID = req.getParameter("ownerID");
MCRObjectID ownerOID = MCRObjectID.getInstance(ownerID);
MCRBasketPersistence.createDerivateWithBasket(basket, ownerOID);
} else if ("update".equals(action)) {
MCRBasketPersistence.updateBasket(basket);
} else if ("retrieve".equals(action)) {
String derivateID = req.getParameter("derivateID");
basket = MCRBasketPersistence.retrieveBasket(derivateID);
type = basket.getType();
MCRBasketManager.setBasketInSession(basket);
} else if ("comment".equals(action)) {
Document sub = (Document) (job.getRequest().getAttribute("MCRXEditorSubmission"));
String comment = sub.getRootElement().getChildTextTrim("comment");
for (String id : ids) {
basket.get(id).setComment(comment);
}
} else if ("show".equals(action)) {
req.setAttribute("XSL.Style", type);
Document xml = new MCRBasketXMLBuilder(true).buildXML(basket);
getLayoutService().doLayout(req, res, new MCRJDOMContent(xml));
return;
}
if (referer != null && "referer".equals(redirect)) {
res.sendRedirect(res.encodeRedirectURL(referer.toExternalForm()));
} else if (redirect != null) {
res.sendRedirect(res.encodeRedirectURL(redirect));
} else {
res.sendRedirect(res.encodeRedirectURL(getServletBaseURL() + "MCRBasketServlet?action=show&type=" + type));
}
}
}