D-Net

package eu.dnetlib.openaire.usermanagement.api;

import com.fasterxml.jackson.core.JsonProcessingException;

import com.fasterxml.jackson.databind.ObjectMapper;

import com.google.gson.Gson;

import com.google.gson.JsonArray;

import com.google.gson.JsonObject;

import com.google.gson.JsonParser;

import com.unboundid.ldap.sdk.LDAPException;

import eu.dnetlib.openaire.user.pojos.migration.LDAPUser;

import eu.dnetlib.openaire.user.pojos.migration.MigrationUser;

import eu.dnetlib.openaire.user.pojos.migration.Role;

import eu.dnetlib.openaire.user.dao.RoleDAO;

import eu.dnetlib.openaire.user.dao.SQLMigrationUserDAO;

import eu.dnetlib.openaire.user.ldap.MUserActionsLDAP;

import eu.dnetlib.openaire.user.store.DataSourceConnector;

import eu.dnetlib.openaire.usermanagement.security.JWTGenerator;

import org.apache.log4j.Logger;

import org.mitre.openid.connect.model.OIDCAuthenticationToken;

import org.mitre.openid.connect.model.UserInfo;

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

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

import org.springframework.http.*;

import org.springframework.http.HttpMethod;

import org.springframework.security.core.context.SecurityContextHolder;

import org.springframework.stereotype.Component;

import org.springframework.web.client.DefaultResponseErrorHandler;

import org.springframework.web.client.RestTemplate;

import javax.ws.rs.*;

import javax.ws.rs.core.MediaType;

import javax.ws.rs.core.Response;

import java.sql.SQLException;

/**

 * Created by sofia on 24/11/2016.

 */

@Component(value = "test3service")

@Path("/users")

public class Test3Service {

    private static final Logger logger = Logger.getLogger(Test3Service.class);

    @Autowired

    private SQLMigrationUserDAO sqlMigrationUserDAO;

    @Autowired

    private MUserActionsLDAP mUserActionsLDAP;

    @Autowired

    private DataSourceConnector dataSourceConnector;

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

    private String issuer;

    @GET

    @Path("/{userId}")

    @Produces(MediaType.APPLICATION_JSON)

    public Response getUserById(@PathParam("userId") int userId) {

        try {

            MigrationUser mUser = sqlMigrationUserDAO.fetchById(userId);

            // Invalide user ID

            if (mUser == null) {

                String errorMessageJson = compose404Message("Cannot find user with id " + userId + ".");

                return Response

                        .status(Response.Status.NOT_FOUND)

                        .entity(errorMessageJson)

                        .type(MediaType.APPLICATION_JSON)

                        .build();

            }

            return Response.status(200).entity(composeDataResponse(mUser)).build();

        }

        catch (SQLException e) {

            return Response

                    .status(Response.Status.INTERNAL_SERVER_ERROR)

                    .entity(compose500Message("Fail to fetch users.", e))

                    .type(MediaType.APPLICATION_JSON)

                    .build();

        }

    }

     /* How to check @browser ../authenticate/?username=MY_USERNAME&password=MY_PASSWORD

     * http://localhost:8080/uoa-user-management-1.0.0-SNAPSHOT/api/users/authenticate?username=sba&password=12345678

    @GET

    @Path("/authenticate")

    @Produces(MediaType.APPLICATION_JSON)

    public Response authenticateUserGET(@QueryParam("username") String username, @QueryParam("password") String password)

    {

        return commonAuthenticateFunction(username, password);

    }*/

    @POST

    @Path("/authenticates")

    @Produces(MediaType.APPLICATION_JSON)

    @Consumes(MediaType.APPLICATION_JSON)

    public Response authenticateUserPOST(String input) {

        JsonObject jsonObject = new JsonParser().parse(input).getAsJsonObject();

        String username = jsonObject.get("username").getAsString();

        String password = jsonObject.get("password").getAsString();

        return commonAuthenticateFunction(username, password);

    }

    private Response commonAuthenticateFunction(String username, String password)

    {

        try {

            boolean usernameExists = mUserActionsLDAP.usernameExists(username);

            // if user was not found

            if (!usernameExists) {

                String errorMessageJson = compose401Message("Wrong credentials.");

                return Response

                        .status(Response.Status.UNAUTHORIZED)

                        .entity(errorMessageJson)

                        .type(MediaType.APPLICATION_JSON)

                        .build();

            }

            boolean authenticated = mUserActionsLDAP.authenticate(username, password);

            // if user was not authenticated

            if (!authenticated) {

                return Response

                        .status(Response.Status.UNAUTHORIZED)

                        .entity(compose401Message("User " + username + " could not be authenticated."))

                        .type(MediaType.APPLICATION_JSON)

                        .build();

            }

            MigrationUser mUser = sqlMigrationUserDAO.fetchByUsername(username);

            // if user was not found in my db

            LDAPUser ldapUser = null;

            if (mUser == null) {

                mUser = new MigrationUser(username);

                ldapUser = mUserActionsLDAP.getUser(username);

                mUser.setFullname(ldapUser.getDisplayName());

                mUser.setEmail(ldapUser.getEmail());

                mUser.setRoleId(2);

                sqlMigrationUserDAO.insert(mUser);

            }

            return Response.status(200).entity(composeDataResponse(mUser)).type(MediaType.APPLICATION_JSON).build();

        } catch (LDAPException exc) {

            logger.error("Fail to connect to LDAP. ", exc);

            return Response

                    .status(Response.Status.INTERNAL_SERVER_ERROR)

                    .entity(compose500Message("LDAP error.", exc))

                    .type(MediaType.APPLICATION_JSON)

                    .build();

        } catch (SQLException exc) {

            logger.error("Fail to fetch users. ", exc);

            return Response

                    .status(Response.Status.INTERNAL_SERVER_ERROR)

                    .entity(compose500Message("Fail to fetch users.", exc))

                    .type(MediaType.APPLICATION_JSON)

                    .build();

        }

    }

    @GET

    @Path("/changeRole")

    @Produces(MediaType.APPLICATION_JSON)

    public Response changeRole(@QueryParam("roleId") int roleId, @QueryParam("userId") int userId)

    {

        RoleDAO roleDAO = new RoleDAO();

        try

        {

            Role role = roleDAO.fetchById(roleId);

            if (role == null)

            {

                //fetch all roleids TODO

                String errorMessageJson = compose404Message("Cannot find role with id" + roleId + ".");

                return Response

                        .status(Response.Status.NOT_FOUND)

                        .entity(errorMessageJson)

                        .type(MediaType.APPLICATION_JSON)

                        .build();

            }

            MigrationUser mUser = sqlMigrationUserDAO.fetchById(userId);

            if (mUser == null)

            {

                String errorMessageJson = compose404Message("Cannot find user with id " + userId + ".");

                return Response

                        .status(Response.Status.NOT_FOUND)

                        .entity(errorMessageJson)

                        .type(MediaType.APPLICATION_JSON)

                        .build();

            }

            mUser.setRoleId(roleId);

            sqlMigrationUserDAO.update(mUser);

            return Response.status(200).entity(composeDataResponse(mUser)).build();

        }

        catch (SQLException exc)

        {

            return Response

                    .status(Response.Status.INTERNAL_SERVER_ERROR)

                    .entity(compose500Message("Fail to fetch users.", exc))

                    .type(MediaType.APPLICATION_JSON)

                    .build();

        }

    }

    @GET

    @Path("/getUserInfo")

    @Produces(MediaType.APPLICATION_JSON)

    public Response getUserInfo(@QueryParam("accessToken") String accessToken) throws JsonProcessingException {

        //return Response.status(404).entity(compose404Message("This is a test message.")).type(MediaType.APPLICATION_JSON).build();

        // call aai with accessToken

        RestTemplate restTemplate = new RestTemplate();

        restTemplate.setErrorHandler(new DefaultResponseErrorHandler(){

            protected boolean hasError(HttpStatus statusCode) {

                return false;

            }});

        HttpHeaders headers = new HttpHeaders();

        headers.add("Authorization","Bearer " + accessToken);

        HttpEntity request = new HttpEntity(null, headers);

        String fooResourceUrl = issuer +"userinfo";

        //logger.info(restTemplate.exchange(fooResourceUrl, HttpMethod.GET, request, Object.class));

        ResponseEntity response1 = restTemplate.exchange(fooResourceUrl, HttpMethod.GET, request, Object.class);

        logger.info(response1.getBody().toString());

        ObjectMapper mapper = new ObjectMapper();

        return Response.status(response1.getStatusCode().value()).entity(mapper.writeValueAsString(response1.getBody())).type(MediaType.APPLICATION_JSON).build();

    }

    @GET

    @Path("/getUser")

    @Produces(MediaType.APPLICATION_JSON)

    public Response getUser()  {

        JsonObject userInfoJson = new JsonObject();

        try {

            OIDCAuthenticationToken authentication = null;

            try {

                authentication = (OIDCAuthenticationToken) SecurityContextHolder.getContext().getAuthentication();

            }catch (Exception e){

                logger.info("Try to get User info - no context found ");

                return Response.status(404).entity(compose404Message("Get User info: no context found ")).type(MediaType.APPLICATION_JSON).build();

            }

            UserInfo userInfo = authentication.getUserInfo();

            if(userInfo == null){

                return Response.status(404).entity(compose404Message("Get User info: user info is null ")).type(MediaType.APPLICATION_JSON).build();

            }

            logger.info("Get User:\n name: " + authentication.getUserInfo().getGivenName() + " " + authentication.getUserInfo().getFamilyName());

            userInfoJson.addProperty("sub", userInfo.getSub());

            userInfoJson.addProperty("name", userInfo.getName());

            userInfoJson.addProperty("given_name", userInfo.getGivenName());

            userInfoJson.addProperty("family_name", userInfo.getFamilyName());

            userInfoJson.addProperty("email", userInfo.getEmail());

            JsonArray roles = new JsonArray();

            JsonObject source = authentication.getUserInfo().getSource();

            roles = source.getAsJsonArray("edu_person_entitlements");

            userInfoJson.add("edu_person_entitlements", roles);

        }catch (Exception e){

            logger.error("Get User info: An error occured ",e);

            return Response.status(500).entity(compose500Message("Get User info: An error occured ",e)).type(MediaType.APPLICATION_JSON).build();

        }

        return Response.status(200).entity(userInfoJson.toString()).type(MediaType.APPLICATION_JSON).build();

    }

    /* JSON Utility Methods */

    private String compose401Message(String message) {

        return  "{ \"status\" : \"error\", \"code\" : \"401\", \"message\" : \"  " + message +" \" }";

    }

    private String compose404Message(String message) {

        return  "{ \"status\" : \"error\", \"code\" : \"404\", \"message\" : \"  " + message +" \" }";

    }

    private String compose500Message(String message, Exception exception) {

        return  "{ \"status\" : \"fail\", \"code\" : \"500\", \"message\" : \"  " + message + "\", " +

                "\"description\" : \""+  exception.getMessage() +"\" }";

    }

    private String composeDataResponse(UserInfo user) {

        return "{ \"status\" : \"success\", \"code\": \"200\", " + "\"data\" : \"" + JWTGenerator.generateToken(user, "my-very-secret") + "\" }";

    }

    private String composeDataResponse(MigrationUser user) {

        //return "{ \"status\" : \"success\", \"code\": \"200\", " + "\"data\" : " + new Gson().toJson(user) + " }";

        return "{ \"status\" : \"success\", \"code\": \"200\", " + "\"data\" : \"" + JWTGenerator.generateToken(user, "my-very-secret") + "\" }";

    }

    private String composeDataResponse(LDAPUser user) {

        return " { \"status\" : \"success\", \"code\": \"200\", " + "\"data\" : " + new Gson().toJson(user) + " }";

    }

//        private String composeDataResponse(String username) {

//            return " { \"status\" : \"success\", \"code\": \"200\", " + "\"data\" : " + new Gson().toJson(username) + " }";

//        }

    private String composeDataResponse(String fullname) {

        return " { \"status\" : \"success\", \"code\": \"200\", " + "\"data\" : " + new Gson().toJson(fullname) + " }";

    }

    public String getIssuer() {

        return issuer;

    }

    public void setIssuer(String issuer) {

        this.issuer = issuer;

    }

}