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/*
* Copyright (C) 2008-2017, Juick
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.juick.www.controllers;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.github.scribejava.apis.FacebookApi;
import com.github.scribejava.core.builder.ServiceBuilder;
import com.github.scribejava.core.model.OAuth2AccessToken;
import com.github.scribejava.core.model.OAuthRequest;
import com.github.scribejava.core.model.Verb;
import com.github.scribejava.core.oauth.OAuth20Service;
import com.juick.server.util.HttpBadRequestException;
import com.juick.service.CrosspostService;
import com.juick.service.EmailService;
import com.juick.service.UserService;
import com.juick.www.Utils;
import com.juick.www.facebook.User;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.math.NumberUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.CookieValue;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import javax.annotation.PostConstruct;
import javax.inject.Inject;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.UUID;
import java.util.concurrent.ExecutionException;
/**
*
* @author Ugnich Anton
*/
@Controller
public class FacebookLogin {
private static final Logger logger = LoggerFactory.getLogger(FacebookLogin.class);
@Value("${facebook_appid}")
private String FACEBOOK_APPID;
@Value("${facebook_secret}")
private String FACEBOOK_SECRET;
private final String FACEBOOK_REDIRECT = "http://juick.com/_fblogin";
@Inject
private ObjectMapper jsonMapper;
private ServiceBuilder serviceBuilder;
@Inject
private CrosspostService crosspostService;
@Inject
private UserService userService;
@Inject
private EmailService emailService;
@PostConstruct
public void init() {
serviceBuilder = new ServiceBuilder(FACEBOOK_APPID);
}
@GetMapping("/_fblogin")
protected String doGet(HttpServletRequest request,
@RequestParam(required = false) String code,
@RequestParam(required = false) String state,
@CookieValue(required = false) String fbstate,
HttpServletResponse response) throws IOException, ExecutionException, InterruptedException {
if (StringUtils.isBlank(code)) {
fbstate = UUID.randomUUID().toString();
Cookie c = new Cookie("fbstate", fbstate);
response.addCookie(c);
OAuth20Service facebookAuthService = serviceBuilder
.apiSecret(FACEBOOK_SECRET)
.callback(FACEBOOK_REDIRECT)
.scope("email")
.state(fbstate)
.build(FacebookApi.instance());
return "redirect:" + facebookAuthService.getAuthorizationUrl();
}
if (StringUtils.isBlank(fbstate) || !fbstate.equals(state)) {
throw new HttpBadRequestException();
} else {
Cookie c = new Cookie("fbstate", "-");
c.setMaxAge(0);
response.addCookie(c);
}
OAuth20Service facebookService = serviceBuilder
.apiKey(FACEBOOK_APPID)
.apiSecret(FACEBOOK_SECRET)
.callback(FACEBOOK_REDIRECT)
.state(state)
.build(FacebookApi.instance());
OAuth2AccessToken token = facebookService.getAccessToken(code);
final OAuthRequest meRequest = new OAuthRequest(Verb.GET, "https://graph.facebook.com/v2.10/me?fields=id,name,link,verified,email");
facebookService.signRequest(token, meRequest);
String graph = facebookService.execute(meRequest).getBody();
if (StringUtils.isBlank(graph)) {
logger.error("FACEBOOK GRAPH ERROR");
throw new HttpBadRequestException();
}
User fb = jsonMapper.readValue(graph, User.class);
long fbID = NumberUtils.toLong(fb.getId(), 0);
if (fbID == 0 || StringUtils.isBlank(fb.getName()) || StringUtils.isBlank(fb.getLink())) {
throw new HttpBadRequestException();
}
int uid = crosspostService.getUIDbyFBID(fbID);
if (uid > 0) {
if (!crosspostService.updateFacebookUser(fbID, token.getAccessToken(), fb.getName(), fb.getLink())) {
throw new HttpBadRequestException();
}
Cookie c = new Cookie("hash", userService.getHashByUID(uid));
c.setMaxAge(50 * 24 * 60 * 60);
response.addCookie(c);
return Utils.getPreviousPageByRequest(request).orElse("redirect:/");
} else if (fb.getVerified()) {
String loginhash = UUID.randomUUID().toString();
if (!crosspostService.createFacebookUser(fbID, loginhash, token.getAccessToken(), fb.getName(), fb.getLink())) {
if (StringUtils.isNotEmpty(fb.getEmail())) {
logger.info("found {} for facebook user {}", fb.getEmail(), fb.getLink());
Integer userId = crosspostService.getUIDbyFBID(fbID);
if (!emailService.getEmails(userId, false).contains(fb.getEmail())) {
emailService.addEmail(userId, fb.getEmail());
}
}
logger.info("email not found for facebook user {}", fb.getLink());
throw new HttpBadRequestException();
}
return "redirect:/signup?type=fb&hash=" + loginhash;
} else {
throw new HttpBadRequestException();
}
}
}
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