D-Net

package eu.dnetlib.openaire.usermanagement;

import eu.dnetlib.openaire.user.utils.EmailSender;

import eu.dnetlib.openaire.user.utils.LDAPActions;

import eu.dnetlib.openaire.user.utils.VerificationActions;

import eu.dnetlib.openaire.user.utils.VerifyRecaptcha;

import eu.dnetlib.openaire.usermanagement.utils.UrlConstructor;

import org.apache.commons.validator.routines.EmailValidator;

import org.apache.log4j.Logger;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.beans.factory.annotation.Value;

import org.springframework.web.context.support.SpringBeanAutowiringSupport;

import javax.mail.MessagingException;

import javax.servlet.ServletConfig;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.servlet.http.HttpSession;

import java.io.IOException;

import java.sql.Timestamp;

import java.util.Date;

import java.util.UUID;

/**

 * Created by sofia on 21/5/2018.

 */

public class RequestToDeleteAccountServlet extends HttpServlet {

    @Autowired

    private VerificationActions verificationActions;

    @Autowired

    private LDAPActions ldapActions;

    @Autowired

    private EmailSender emailSender;

    @Value("${oidc.home}")

    private String oidcHomeUrl;

    @Value("${google.recaptcha.secret}")

    private String secret;

    @Value("${google.recaptcha.key}")

    private String sitekey;

    private static final Logger logger = Logger.getLogger(RequestActivationCodeServlet.class);

    public void init(ServletConfig config) throws ServletException {

        super.init(config);

        SpringBeanAutowiringSupport.processInjectionBasedOnServletContext(this,

                config.getServletContext());

        config.getServletContext().setAttribute("sitekey", sitekey);

    }

    @Override

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException {

        String formEmail = request.getParameter("email").trim();

        String gRecaptchaResponse = request.getParameter("g-recaptcha-response");

        HttpSession session = request.getSession();

        session.setAttribute("homeUrl", oidcHomeUrl);

        if (formEmail == null) {

            request.getSession().setAttribute("message", "Error reading email.");

            response.sendRedirect("./requestToDeleteAccount.jsp");

        } else if (formEmail.isEmpty()) {

            request.getSession().setAttribute("message", "Please enter your email.");

            response.sendRedirect("./requestToDeleteAccount.jsp");

        } else if (!EmailValidator.getInstance().isValid(formEmail)) {

            request.getSession().setAttribute("message", "Please enter a valid email.");

            response.sendRedirect("./requestToDeleteAccount.jsp");

        } else if (!VerifyRecaptcha.verify(gRecaptchaResponse, secret)) {

            request.getSession().setAttribute("reCAPTCHA_message", "You missed the reCAPTCHA validation!");

            response.sendRedirect("./requestToDeleteAccount.jsp");

        } else {

            try {

                Boolean isRegistered = false;

                Boolean isZombie = false;

                if (ldapActions.emailExists(formEmail)) {

                    logger.info("User with email: " + formEmail + " is activated user!");

                    isRegistered = true;

                } else if (ldapActions.isZombieUsersEmail(formEmail)) {

                    logger.info("User with email: " + formEmail + " is zombie user!");

                    isZombie = true;

                }

                if (!isRegistered && !isZombie) {

                    request.getSession().setAttribute("message", "There is no user with that email.");

                    response.sendRedirect("./requestToDeleteAccount.jsp");

                } else {

                    String username = null;

                    if (isRegistered) {

                        username = ldapActions.getUsername(formEmail);

                    } else if (isZombie) {

                        username = ldapActions.getZombieUsersUserName(formEmail);

                    }

                    UUID verificationCode = UUID.randomUUID();

                    Date creationDate = new Date();

                    String vCode = verificationCode.toString();

                    Timestamp timestamp = new Timestamp(creationDate.getTime());

                    if (!verificationActions.verificationEntryExists(username)) {

                        verificationActions.addVerificationEntry(username, vCode, timestamp);

                    } else {

                        verificationActions.updateVerificationEntry(username, vCode, timestamp);

                    }

                    String resultPath = UrlConstructor.getRedirectUrl(request, "verifyToDelete.jsp");

                    String resultPathWithVCode = UrlConstructor.getVerificationLink(resultPath, vCode);

                    String verificationCodeMsg = "<p>Hello " + username + ",</p>" +

                            "<p> A request has been made to get a verification code to delete your OpenAIRE account. To delete your " +

                            "account, you will need to submit your username and this verification code in order to verify that the " +

                            "request was legitimate.</p>" +

                            "<p>" +

                            "The verification code is " + vCode +

                            "</p>" +

                            "Click the URL below and proceed with deleting your account." +

                            "<p><a href=" + resultPathWithVCode + ">" + resultPathWithVCode + "</a></p>" +

                            "<p>The verification code is valid for 24 hours.</p>" +

                            "<p>Thank you,</p>" +

                            "<p>OpenAIRE technical team</p>";

                    String verificationCodeSubject = "Request to delete your OpenAIRE account";

                    emailSender.sendEmail(formEmail, verificationCodeSubject, verificationCodeMsg);

                    logger.info("Sending verification code to user: " + formEmail);

                    response.sendRedirect("./verifyToDelete.jsp");

                }

            } catch (MessagingException e) {

                logger.error("Error in sending email", e);

                request.getSession().setAttribute("message", "Error sending email");

                response.sendRedirect("./requestActivationCode.jsp");

            } catch (Exception ldape) {

                logger.error("Could not user with email " + formEmail, ldape);

                response.sendRedirect(UrlConstructor.getRedirectUrl(request, "error.jsp"));

            }

        }

    }

    public String getOidcHomeUrl() {

        return oidcHomeUrl;

    }

    public void setOidcHomeUrl(String oidcHomeUrl) {

        this.oidcHomeUrl = oidcHomeUrl;

    }

}