D-Net

package eu.dnetlib.openaire.usermanagement.api;

import com.fasterxml.jackson.core.JsonProcessingException;

import com.google.gson.Gson;

import com.google.gson.JsonArray;

import com.google.gson.JsonObject;

import com.google.gson.JsonParser;

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

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

import eu.dnetlib.openaire.user.login.utils.AuthoritiesMapper;

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

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

import org.apache.commons.io.IOUtils;

import org.apache.http.HttpResponse;

import org.apache.http.NameValuePair;

import org.apache.http.client.entity.UrlEncodedFormEntity;

import org.apache.http.client.methods.HttpPost;

import org.apache.http.impl.client.CloseableHttpClient;

import org.apache.http.impl.client.HttpClients;

import org.apache.http.message.BasicNameValuePair;

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.security.access.prepost.PreAuthorize;

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.servlet.http.HttpServletRequest;

import javax.ws.rs.GET;

import javax.ws.rs.Path;

import javax.ws.rs.Produces;

import javax.ws.rs.QueryParam;

import javax.ws.rs.core.Context;

import javax.ws.rs.core.MediaType;

import javax.ws.rs.core.Response;

import java.io.IOException;

import java.io.InputStream;

import java.io.UnsupportedEncodingException;

import java.nio.charset.StandardCharsets;

import java.util.ArrayList;

import java.util.List;

/**

 * Created by sofia on 24/11/2016.

 */

@Component(value = "test3service")

@Path("/users")

public class Test3Service {

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

    public static final String errorMessage = "{ \"status\" : \"error\", \"code\" : \"%s\", \"message\" : \"%s\", \"description\" : \"%s\" }";

    @Autowired

    private SQLMigrationUserDAO sqlMigrationUserDAO;

    @Autowired

    private MUserActionsLDAP mUserActionsLDAP;

    @Autowired

    private DataSourceConnector dataSourceConnector;

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

    private String issuer;

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

    private String secret;

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

    private String id;

    @GET

    @PreAuthorize("hasAuthority('ROLE_USER')")

    @Path("/getRefreshToken")

    public Response getRefreshToken(){

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

        return Response.status(200).entity(authentication.getRefreshTokenValue()).build();

    }

    @GET

    @PreAuthorize("hasAuthority('ROLE_USER')")

    @Path("/getJWTToken")

    public Response getAccessToken(){

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

        return Response.status(200).entity(authentication.getAccessTokenValue()).build();

    }

    @GET

    @Path("/getAccessToken")

    @Produces(MediaType.APPLICATION_JSON)

    public Response getAccessTokenFromRefreshToken(@Context final HttpServletRequest request,

                                                   @QueryParam("refreshToken") String refreshToken){

        if (refreshToken == null || refreshToken.isEmpty()) {

            return Response.status(Response.Status.BAD_REQUEST)

                    .entity(String.format(errorMessage, 400, "Bad Request", "Missing refreshToken parameter"))

                    .type(MediaType.APPLICATION_JSON).build();

        }

        CloseableHttpClient httpclient = HttpClients.createDefault();

        HttpPost httppost = new HttpPost(issuer+"/token");

        // Request parameters and other properties.

        List<NameValuePair> params = new ArrayList<NameValuePair>();

        params.add(new BasicNameValuePair("client_id", id));

        params.add(new BasicNameValuePair("client_secret", secret));

        params.add(new BasicNameValuePair("grant_type", "refresh_token"));

        params.add(new BasicNameValuePair("refresh_token", refreshToken));

        params.add(new BasicNameValuePair("scope", "openid"));

        HttpResponse response = null;

        try {

            httppost.setEntity(new UrlEncodedFormEntity(params, "UTF-8"));

            //Execute and get the response.

            response = httpclient.execute(httppost);

            org.apache.http.HttpEntity entity = response.getEntity();

            if (response.getStatusLine().getStatusCode() == 401) {

                return Response.status(Response.Status.UNAUTHORIZED)

                        .entity(String.format(errorMessage, 401, "Unauthorised", "Invalid refreshToken token " + refreshToken))

                        .type(MediaType.APPLICATION_JSON).build();

            }

            String serverMessage = IOUtils.toString(entity.getContent(), StandardCharsets.UTF_8.name());

            return Response.status(response.getStatusLine().getStatusCode())

                    .entity(serverMessage).type(MediaType.APPLICATION_JSON).build();

        }  catch (UnsupportedEncodingException uee) {

            logger.error(uee);

            return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(String.format(errorMessage, 500, "Fail to get access token.", uee.getMessage()))

                    .type(MediaType.APPLICATION_JSON).build();

        } catch (IOException ioe) {

            logger.error(ioe);

            return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(String.format(errorMessage, 500, "Fail to get access token.", ioe.getMessage()))

                    .type(MediaType.APPLICATION_JSON).build();

        }

    }

    @GET

    @Path("/getToken")

    @Produces(MediaType.APPLICATION_JSON)

    public Response getToken(@QueryParam("accessToken") String accessToken){

        logger.debug("Refresh token " + accessToken);

        CloseableHttpClient httpclient = HttpClients.createDefault();

        HttpPost httppost = new HttpPost(issuer+"/token");

        // Request parameters and other properties.

        List<NameValuePair> params = new ArrayList<NameValuePair>();

        params.add(new BasicNameValuePair("client_id", id));

        params.add(new BasicNameValuePair("client_secret", secret));

        params.add(new BasicNameValuePair("grant_type", "refresh_token"));

        params.add(new BasicNameValuePair("refresh_token", accessToken));

        params.add(new BasicNameValuePair("scope", "openid"));

        try {

            httppost.setEntity(new UrlEncodedFormEntity(params, "UTF-8"));

            //Execute and get the response.

            HttpResponse response = null;

            response = httpclient.execute(httppost);

            org.apache.http.HttpEntity entity = response.getEntity();

            if (entity != null) {

                try (InputStream instream = entity.getContent()) {

                    logger.debug(IOUtils.toString(instream, StandardCharsets.UTF_8.name()));

                }

            }

        }  catch (UnsupportedEncodingException uee) {

            logger.error(uee);

            return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(String.format(errorMessage, 500, "Fail to get access token.", uee.getMessage()))

                    .type(MediaType.APPLICATION_JSON).build();

        } catch (IOException ioe) {

            logger.error(ioe);

            return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(String.format(errorMessage, 500, "Fail to get access token.", ioe.getMessage()))

                    .type(MediaType.APPLICATION_JSON).build();

        }

        return Response.status(200).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

        logger.info(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<String>  request = new HttpEntity<>(headers);

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

        ResponseEntity<String> response = restTemplate.exchange(issuer +"userinfo", HttpMethod.GET, request, String.class);

        if(response.getStatusCode() == HttpStatus.OK) {

            JsonObject userInfo = new JsonParser().parse(response.getBody()).getAsJsonObject();

            JsonArray roles = new JsonArray();

            AuthoritiesMapper.map(userInfo.get("edu_person_entitlements").getAsJsonArray()).forEach(grantedAuthority -> {

                roles.add(grantedAuthority.getAuthority());

            });

            userInfo.add("roles", roles);

            return Response.status(response.getStatusCode().value()).entity(userInfo.toString()).type(MediaType.APPLICATION_JSON).build();

        } else {

            return Response.status(response.getStatusCode().value()).entity(response.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();

            authentication.getAuthorities().forEach(grantedAuthority -> {

                roles.add(grantedAuthority.getAuthority());

            });

            userInfoJson.add("roles", roles);

        }catch (Exception e){

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

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

        }

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

    }

/*

    @GET

    @Path("/katerina")

    @Produces(MediaType.APPLICATION_JSON)

    //@PreAuthorize("hasRole('ROLE_USER')")

    @PreAuthorize("hasAuthority('urn:geant:openaire.eu:group:Registered+User#aai.openaire.eu')")

    public Response getKaterina()  {

        return Response.status(200).build();

    }

    @GET

    @Path("/skata")

    @Produces(MediaType.APPLICATION_JSON)

    @PreAuthorize("hasRole('ROLE_USER')")

    public Response getKaterina2()  {

        return Response.status(200).build();

    }

    @GET

    @Path("/skata2")

    @Produces(MediaType.APPLICATION_JSON)

    @PreAuthorize("hasAuthority('skata')")

    public Response getKaterina3()  {

        return Response.status(200).build();

    }

    @GET

    @Path("/me")

    //@Produces(MediaType.APPLICATION_JSON)

    public Response getKaterina(@AuthenticationPrincipal UserDetails userDetails)  {

        //return Response.status(200).entity(userDetails).type(MediaType.APPLICATION_JSON).build();

        return Response.status(200).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(LDAPUser user) {

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

    }

    private String composeDataResponse(String fullname) {

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

    }

}