// https://developers.facebook.com/docs/howtos/login/server-side-login/#step1
@Override
public boolean preHandle(final HttpServletRequest req, final HttpServletResponse res)
throws Exception {
final String code = getParamOrCookieValue(req, "code", "fb_code");
if (Strings.isNullOrEmpty(code)) {
redirectToLoginDialog(res);
return false;
}
final String sessionState = getParamOrCookieValue(req, "state", "fb_sessionState");
if (Strings.isNullOrEmpty(sessionState)) {
return false;
}
if (req.getParameter("signout") != null) {
this.client.logout();
deleteSessionCookies(res);
res.sendRedirect(this.fbRedirectAfterLogout);
return false;
}
String accessToken = readAccessToken(code);
if (Strings.isNullOrEmpty(accessToken)) {
redirectToLoginDialog(res);
return false;
}
final String basicUserInfo = getBasicUserInfo(accessToken);
LOG.info(basicUserInfo);
final FacebookUser fbUser = deserializeFacebookUser(basicUserInfo);
final String userName = fbUser.getId();
final boolean userExists = doesUserExist(userName);
if (userExists) {
setAuthenticationCookies(res, code, sessionState, userName);
res.sendRedirect(this.fbRedirectAfterLogin);
return false;
}
// TODO: Remove "#1:" since it's probably in default userstore
this.client.impersonate("#1:esocial");
final CreateUserParams createUserParams = new CreateUserParams();
UserInfo userInfo = new UserInfo();
createUserParams.username = fbUser.getId();
createUserParams.displayName = fbUser.getName();
createUserParams.password = createPasswordHash(fbUser);
createUserParams.userstore = "facebook";
createUserParams.email = fbUser.getUserName() + "@facebook.com";
userInfo.setFirstName(fbUser.getFirstName());
userInfo.setLastName(fbUser.getLastName());
userInfo.setNickName(fbUser.getUserName());
userInfo.setPersonalId(fbUser.getId());
createUserParams.userInfo = userInfo;
this.client.createUser(createUserParams);
final JoinGroupsParams joinGroupsParams = new JoinGroupsParams();
// joinGroupsParams.group = "#2:Facebook";
joinGroupsParams.groupsToJoin = new String[] {"#2:Facebook"};
joinGroupsParams.user = "******" + userName;
this.client.joinGroups(joinGroupsParams);
setAuthenticationCookies(res, code, sessionState, userName);
res.sendRedirect(this.fbRedirectAfterLogin);
return false;
}
