Fixing the error on the publish action #50

sources/Re3gistry2/src/main/java/eu/europa/ec/re3gistry2/web/controller/UpdateRSS.java

@@ -0,0 +1,157 @@
+/*
+ * Copyright 2007,2016 EUROPEAN UNION
+ * Licensed under the EUPL, Version 1.2 or - as soon they will be approved by
+ * the European Commission - subsequent versions of the EUPL (the "Licence");
+ * You may not use this work except in compliance with the Licence.
+ * You may obtain a copy of the Licence at:
+ *
+ * https://ec.europa.eu/isa2/solutions/european-union-public-licence-eupl_en
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the Licence is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the Licence for the specific language governing permissions and
+ * limitations under the Licence.
+ *
+ * Date: 2020/05/11
+ * Authors:
+ * European Commission, Joint Research Centre - [email protected]
+ *
+ * This work was supported by the Interoperability solutions for public
+ * administrations, businesses and citizens programme (http://ec.europa.eu/isa2)
+ * through Action 2016.10: European Location Interoperability Solutions for e-Government (ELISE)
+ */
+package eu.europa.ec.re3gistry2.web.controller;
+
+import eu.europa.ec.re3gistry2.base.utility.BaseConstants;
+import eu.europa.ec.re3gistry2.base.utility.Configuration;
+import eu.europa.ec.re3gistry2.base.utility.ItemHelper;
+import eu.europa.ec.re3gistry2.base.utility.WebConstants;
+import eu.europa.ec.re3gistry2.model.RegAction;
+import eu.europa.ec.re3gistry2.model.RegItem;
+import java.io.File;
+import java.io.IOException;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.List;
+import java.util.Properties;
+import java.util.logging.Level;
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.ParserConfigurationException;
+import javax.xml.transform.OutputKeys;
+import javax.xml.transform.Transformer;
+import javax.xml.transform.TransformerFactory;
+import javax.xml.transform.dom.DOMSource;
+import javax.xml.transform.stream.StreamResult;
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.Node;
+import org.w3c.dom.NodeList;
+import org.xml.sax.SAXException;
+
+public class UpdateRSS {
+
+    public UpdateRSS() {
+    }
+
+    public static void updateRSS(RegAction regAction, List<RegItem> regItems) throws Exception {
+        Date regActionInsertDate = regAction.getInsertdate();
+        SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
+        String strDate = formatter.format(regActionInsertDate);
+        try {
+            // Get configuration properties
+            final Properties properties = Configuration.getInstance().getProperties();
+            String pathRSS = properties.getProperty(BaseConstants.KEY_RELEASENOTE_RSS_APPLICATION) + WebConstants.PAGE_PATH_RSS + WebConstants.PAGE_URINAME_RSS + WebConstants.PAGE_RSS_EXTENSION;
+
+            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
+            DocumentBuilder builder = factory.newDocumentBuilder();
+
+            Document document = builder.parse(new File(pathRSS));
+
+            NodeList nList = document.getElementsByTagName("item");
+
+            boolean itemExist = false;
+            for (int temp = 0; temp < nList.getLength(); temp++) {
+                Node node = nList.item(temp);
+                if (node.getNodeType() == Node.ELEMENT_NODE) {
+                    Element eElement = (Element) node;
+
+                    if (strDate.equals(eElement.getAttribute("id"))) {
+                        updateInformationToItemRSS(document, eElement, regAction, regItems);
+                        itemExist = true;
+                        break;
+                    }
+                }
+            }
+
+            if (!itemExist) {
+                createItemRSS(document, regAction, regItems);
+            }
+
+            //for output to file, console
+            TransformerFactory transformerFactory = TransformerFactory.newInstance();
+
+            Transformer transformer = transformerFactory.newTransformer();
+            //for pretty print
+            transformer.setOutputProperty(OutputKeys.INDENT, "yes");
+            transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");
+            DOMSource source = new DOMSource(document);
+
+            //write to file
+            StreamResult file = new StreamResult(new File(pathRSS));
+
+            //write data
+            transformer.transform(source, file);
+        } catch (ParserConfigurationException | SAXException | IOException ex) {
+            java.util.logging.Logger.getLogger(RegisterManager.class.getName()).log(Level.SEVERE, null, ex);
+        }
+
+    }
+
+    private static void updateInformationToItemRSS(Document document, Element eElement, RegAction regAction, List<RegItem> regItems) throws Exception {
+        NodeList descriptionNodeList = eElement.getElementsByTagName("description");
+        Element descriptionElement = (Element) descriptionNodeList.item(0);
+        String description = descriptionNodeList.item(0).getTextContent().replace("<![CDATA[", "").replace("]]>", "");
+        String newActionText = "<p>Changes for action: " + (regAction.getChangelog() == null ? "The registry item has been updated." : regAction.getChangelog()) + "</p>\n";
+        newActionText += "<ul>";
+        for (RegItem regItem : regItems) {
+            newActionText += "<li> " + ItemHelper.getURI(regItem) + "</li>\n";
+        }
+        newActionText += "</ul>";
+
+        Element descriptionNewElement = document.createElement("description");
+        descriptionNewElement.appendChild(document.createCDATASection(newActionText.concat(description)));
+
+        eElement.replaceChild(descriptionNewElement, descriptionElement);
+    }
+
+    private static void createItemRSS(Document document, RegAction regAction, List<RegItem> regItems) throws Exception {
+        Element root = document.getDocumentElement();
+        Element itemElement = document.createElement("item");
+
+        SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
+        String strDate = formatter.format(regAction.getInsertdate());
+        itemElement.setAttribute("id", strDate);
+
+        Element titleElement = document.createElement("title");
+        titleElement.setTextContent("Release: " + strDate);
+        itemElement.appendChild(titleElement);
+
+        Element descriptionElement = document.createElement("description");
+        String itemsDescription = "<p>Changes for action: " + (regAction.getChangelog() == null ? "The registry item has been updated." : regAction.getChangelog()) + "</p>\n";
+        itemsDescription += "<ul>";
+        for (RegItem regItem : regItems) {
+            itemsDescription += "<li>" + ItemHelper.getURI(regItem) + "</li>\n";
+        }
+        itemsDescription += "</ul> \n";
+
+        descriptionElement.appendChild(document.createCDATASection(itemsDescription));
+        itemElement.appendChild(descriptionElement);
+
+        NodeList channelNodeList = document.getElementsByTagName("channel");
+        Node channel = channelNodeList.item(0);
+        channel.getParentNode().insertBefore(itemElement, channel.getNextSibling());
+    }
+
+}