juick-spring-www/src/main/java/com/juick/www/controllers/LoginController.java


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package com.juick.www.controllers;

import com.juick.User;
import com.juick.server.util.HttpBadRequestException;
import com.juick.server.util.HttpForbiddenException;
import com.juick.service.UserService;
import com.juick.util.UserUtils;
import org.springframework.core.env.Environment;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestHeader;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;

import javax.inject.Inject;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletResponse;
import java.net.URI;
import java.security.Principal;
import java.util.Optional;

/**
 * Created by vitalyster on 09.12.2016.
 */
@Controller
public class LoginController {
    @Inject
    UserService userService;
    @Inject
    Environment env;

    @RequestMapping(value = "/login", method = RequestMethod.GET)
    public String doGetLoginForm(Principal principal) {
        String name = UserUtils.getUsername(principal, null);
        User visitor = userService.getUserByName(name);
        if (visitor.getUid() > 0) {
            return "redirect:/login";
        }
        return "views/login";
    }
    @RequestMapping(value = "/login", method = RequestMethod.POST)
    protected String doPostLogin(
            @RequestParam("username") Optional<String> username,
            @RequestParam("password") Optional<String> password,
            @RequestHeader("Referer") Optional<String> referer,
            HttpServletResponse response) {
        if (!username.isPresent() && password.isPresent()) {
            throw new HttpBadRequestException();
        }

        int uid = userService.checkPassword(username.get(), password.get());
        if (uid > 0) {
            if (referer.isPresent()) {
                URI refererURI = URI.create(referer.get());
                if (refererURI.getHost().equals(env.getProperty("web_domain"))
                        && !refererURI.getPath().equals("/login")) {
                    return "redirect:" + referer.get();
                } else {
                    return "redirect:/";
                }
            }
        }
        throw new HttpForbiddenException();
    }
}