/*
* The MIT License (MIT)
*
* Copyright (c) 2014 México Abierto
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* For more information visit https://github.com/mxabierto/avisos.
*/
package mx.org.cedn.avisosconagua.engine;
import com.mongodb.BasicDBObject;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.List;
import java.util.UUID;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import mx.org.cedn.avisosconagua.exceptions.AvisosException;
import mx.org.cedn.avisosconagua.mongo.MongoInterface;
/**
* Controller servlet.
* Manages the requests in the defined workflows for the web application, taking as input the {@link types.properties} config file.
* @author serch
*/
@WebServlet(name = "Controler", urlPatterns = {"/ctrl/*"})
public class Controler extends HttpServlet {
private static final HashMap<String, List<String>> control = new HashMap<>();
private static final HashMap<String, Processor> processors = new HashMap<>();
private static final String ADVICE_ID = "internalId";
@Override
public void init(ServletConfig config) throws ServletException {
super.init(config);
try (BufferedReader input = new BufferedReader(new InputStreamReader(Controler.class.getResourceAsStream("/types.properties")))) {
String linea;
while ((linea = input.readLine()) != null) {
if (!linea.startsWith("#")) {
String[] kv = linea.split("=");
if (kv.length == 2) {
String[] val = kv[1].split(",");
List<String> list = Arrays.asList(val);
control.put(kv[0], list);
for (String proc : list) {
if (!processors.containsKey(proc)) {
String clazzName = "mx.org.cedn.avisosconagua.engine.processors." + proc.substring(0, 1).toUpperCase() + proc.substring(1);
Class clazz = Class.forName(clazzName);
Processor procObj = (Processor) clazz.newInstance();
processors.put(proc, procObj);
}
}
}
}
}
} catch (IOException | ReflectiveOperationException ex) {
ex.printStackTrace();
}
}
/**
* Processes requests for both HTTP <code>GET</code> and <code>POST</code>
* methods.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String currentId = (String) request.getSession(true).getAttribute(ADVICE_ID);
String[] parts = request.getRequestURI().split("/");
if (parts.length > 3 && control.containsKey(parts[2])) {
List<String> flujo = control.get(parts[2]);
BasicDBObject datos = null;
if (flujo.contains(parts[3])) {
if ("capgen".equals(parts[2])) {
processors.get(parts[3]).invokeForm(request, response,
null, parts);
return;
}
if (parts.length > 4 && !"new".equals(parts[4])) {
datos = MongoInterface.getInstance().getAdvice(parts[4]);
if (null != datos) {
currentId = parts[4];
request.getSession(true).setAttribute(ADVICE_ID, currentId);
response.sendRedirect("/" + parts[1] + "/" + parts[2] + "/" + parts[3]);
return;
}
}
if ((null == currentId && parts[3].equals(flujo.get(0))) || (parts.length > 4 && "new".equals(parts[4]))) {
currentId = UUID.randomUUID().toString();
request.getSession(true).setAttribute(ADVICE_ID, currentId);
MongoInterface.getInstance().createNewAdvice(currentId, parts[2]);
response.sendRedirect("/" + parts[1] + "/" + parts[2] + "/" + parts[3]);
return;
}
if (null == datos) {
datos = MongoInterface.getInstance().getAdvice(currentId);
}
cleanAttributes(request);
processors.get(parts[3]).invokeForm(request, response,
(BasicDBObject) datos.get(parts[3]), parts);
}
}
}
// <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
/**
* Handles the HTTP <code>GET</code> method.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
/**
* Handles the HTTP <code>POST</code> method.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String currentId = (String) request.getSession(true).getAttribute(ADVICE_ID);
if (null == currentId) {
response.sendError(500, "Call outside the flow");
}
String[] parts = request.getRequestURI().split("/");
if (parts.length > 3 && control.containsKey(parts[2])
&& control.get(parts[2]).contains(parts[3])) {
try {
processors.get(parts[3]).processForm(request, parts, currentId);
} catch (AvisosException aex){
PrintWriter pw = response.getWriter();
pw.println("<html><body><script>alert('Error: "+
aex.getMessage()+
"'); window.location.href='/ctrl/"+parts[2]+"/"+parts[3]+
"';</script></body></html>");
pw.flush();
System.out.println("tuve error, listo para return");
return;
}
System.out.println("redirect a nextPart");
response.sendRedirect("/ctrl/" + parts[2] + "/" + getNext(parts));
} else {
System.out.println("not found");
response.sendError(404);
}
}
/**
* Returns a short description of the servlet.
*
* @return a String containing servlet description
*/
@Override
public String getServletInfo() {
return "Short description";
}// </editor-fold>
/**
* Cleans the attributes from the servlet request.
* @param request servlet request.
*/
private void cleanAttributes(HttpServletRequest request) {
Enumeration<String> en = request.getAttributeNames();
while (en.hasMoreElements()) {
String act = en.nextElement();
request.removeAttribute(act);
}
}
/**
* Gets the next step from the workflows configured in the controller.
* @param parts parts of the request URI.
* @return next step in the configured workflow.
*/
private String getNext(String[] parts) {
List<String> flujo = control.get(parts[2]);
int idx = flujo.indexOf(parts[3]) + 1;
if (idx < flujo.size()) {
return flujo.get(idx);
} else {
return null;
}
}
}