Subversion Repositories bacoAlunos

package pt.estgp.estgweb.web.json;

import com.owlike.genson.TransformationException;

import jomm.dao.impl.AbstractDao;

import org.apache.log4j.Logger;

import org.json.JSONArray;

import org.json.JSONException;

import org.json.JSONObject;

import pt.estgp.estgweb.domain.UserSession;

import pt.estgp.estgweb.services.courses.CoursesService;

import pt.estgp.estgweb.services.courses.xsd.Curso;

import pt.estgp.estgweb.web.UserSessionProxy;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.xml.bind.JAXBContext;

import javax.xml.bind.JAXBException;

import javax.xml.bind.Marshaller;

import javax.xml.bind.Unmarshaller;

import java.io.IOException;

import java.io.PrintWriter;

import java.io.StringReader;

/**

 * Created by jorgemachado on 02/02/16.

 */

public class JsonHandler extends HttpServlet

{

    private static final 1.5.0/docs/api/java/util/logging/Logger.html">Logger logger = 1.5.0/docs/api/java/util/logging/Logger.html">Logger.getLogger(JsonHandler.class);

    /** Handles the HTTP <code>GET</code> method.

     * @param request servlet request

     * @param response servlet response

     */

    protected void doGet(HttpServletRequest request, HttpServletResponse response)

            throws ServletException, 1.5.0/docs/api/java/io/IOException.html">IOException {

        processRequestSafe(request, response);

    }

    /** Handles the HTTP <code>POST</code> method.

     * @param request servlet request

     * @param response servlet response

     */

    protected void doPost(HttpServletRequest request, HttpServletResponse response)

            throws ServletException, 1.5.0/docs/api/java/io/IOException.html">IOException {

        processRequestSafe(request, response);

    }

    private void processRequestSafe(HttpServletRequest request, HttpServletResponse response) throws 1.5.0/docs/api/java/io/IOException.html">IOException {

        response.setContentType("application/json");

        try {

            processRequest(request, response);

        } catch (TransformationException e)

        {

            response.getWriter().print(e);

            response.getWriter().print("See log for details:");

            logger.error(e,e);

        }

        catch (JAXBException e)

        {

            response.getWriter().print(e);

            response.getWriter().print("See log for details:");

            logger.error(e,e);

        }

        catch (JSONException e)

        {

            response.getWriter().print(e);

            response.getWriter().print("See log for details:");

            logger.error(e, e);

        }

    }

    private void processRequest(HttpServletRequest request, HttpServletResponse response) throws 1.5.0/docs/api/java/io/IOException.html">IOException, TransformationException, JAXBException, JSONException {

        1.5.0/docs/api/java/lang/String.html">String service = request.getParameter("service");

        if(service == null)

        {

            printServices(response.getWriter());

        }

        else if(service.equals("listCourses"))

        {

            1.5.0/docs/api/java/lang/String.html">String school = request.getParameter("school");

            1.5.0/docs/api/java/lang/String.html">String type = request.getParameter("type");

            AbstractDao.getCurrentSession().beginTransaction();

            JSONObject obj = new CoursesService().getActiveCoursesForJsonApi(school,type);

            AbstractDao.getCurrentSession().getTransaction().commit();

            response.getWriter().write(obj.toString());

        }

        else if(service.equals("getCourse") && request.getParameter("code") != null)

        {

            1.5.0/docs/api/java/lang/String.html">String code = request.getParameter("code");

            AbstractDao.getCurrentSession().beginTransaction();

            JSONObject obj = new CoursesService().getCourseDetailForJsonApi(code);

            AbstractDao.getCurrentSession().getTransaction().commit();

            response.getWriter().write(obj.toString());

        }

        else if(service.equals("getStudiesPlanXml") && request.getParameter("code") != null)

        {

            1.5.0/docs/api/java/lang/String.html">String code = request.getParameter("code");

            response.setContentType("application/xml");

            response.setCharacterEncoding("UTF-8");

            AbstractDao.getCurrentSession().beginTransaction();

            1.5.0/docs/api/java/lang/String.html">String xml = new CoursesService().getCourseStudiesPlanXml(code);

            JAXBContext jc = JAXBContext.newInstance(Curso.class);

            Unmarshaller unmarshaller = jc.createUnmarshaller();

            Curso curso = (Curso) unmarshaller.unmarshal(new 1.5.0/docs/api/java/io/StringReader.html">StringReader(xml));

            Marshaller marshaller = jc.createMarshaller();

            marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);

            marshaller.marshal(curso, response.getOutputStream());

            //SETTING XML in COURSE STUDIES PLAN

            AbstractDao.getCurrentSession().getTransaction().commit();

        }

        else if(service.equals("syncSystemPlans") && request.getParameter("systemUrl") != null && request.getParameter("setActive") != null)

        {

            UserSession sess = UserSessionProxy.loadUserSessionFromRequest(request);

            response.setContentType("application/xml");

            if(sess.getUser() != null && sess.getUser().isSuperuserOrAdmin())

            {

                1.5.0/docs/api/java/lang/String.html">String systemUrl = request.getParameter("systemUrl");

                boolean setActive = 1.5.0/docs/api/java/lang/Boolean.html">Boolean.parseBoolean(request.getParameter("setActive"));

                response.setContentType("application/xml");

                AbstractDao.getCurrentSession().beginTransaction();

                1.5.0/docs/api/java/lang/String.html">String log = new CoursesService().sincronizeCoursesStudiesPlans(systemUrl,setActive);

                AbstractDao.getCurrentSession().getTransaction().commit();

                response.getWriter().write("<response><status>OK</status><log>" + log + "</log></response>");

            }

            else

            {

                response.getWriter().write("<error>Permission Denied</error>");

            }

        }

        else

        {

            printServices(response.getWriter());

        }

    }

    public void printServices(1.5.0/docs/api/java/io/PrintWriter.html">PrintWriter out) throws JSONException, 1.5.0/docs/api/java/io/IOException.html">IOException

    {

        JSONObject obj = new JSONObject();

        JSONArray availableServices = new JSONArray();

        JSONObject service2 = new JSONObject();

        service2.put("name","getCourse");

        service2.put("parameterCode","code");

        service2.put("parameterCodeType","integer");

        service2.put("exampleCall1","/wsjson/api?service=getCourse&code=9119");

        JSONObject service = new JSONObject();

        service.put("name","listCourses");

        service.put("parameterType","type");

        service.put("parameterTypeEnumValues","Licenciaturas,Mestrados,PosGraduacoes,CET,CTeSP or none for all");

        service.put("parameterSchool","school");

        service.put("parameterSchoolEnumValues","ESTG,ESECS,ESS,ESAE or none for all");

        service.put("exampleCall1","/wsjson/api?service=listCourses");

        service.put("exampleCall2","/wsjson/api?service=listCourses&type=Licenciaturas&school=ESTG");

        availableServices.put(service);

        availableServices.put(service2);

        JSONObject response = new JSONObject();

        obj.put("response",response);

        response.put("status","invalid service");

        response.put("availableServices",availableServices);

        out.write(obj.toString());

    }

}