ar.com.zauber.commons.social.oauth.examples.web.controllers.WelcomeController.java Source code

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/**
 * Copyright (c) 2005-2011 Zauber S.A. <http://www.zaubersoftware.com/>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package ar.com.zauber.commons.social.oauth.examples.web.controllers;

import java.io.IOException;

import org.apache.commons.lang.Validate;
import org.springframework.http.HttpStatus;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.web.servlet.ModelAndView;

import ar.com.zauber.commons.social.oauth.examples.services.ExampleUser;
import ar.com.zauber.commons.social.oauth.examples.services.ExampleUserDao;
import ar.com.zauber.commons.social.oauth.examples.services.ExampleUserDetails;

/**
 * Controller for welcome page.
 * 
 * 
 * @author Francisco J. Gonzlez Costanz
 * @since Sep 23, 2010
 */
public final class WelcomeController {

    private final ExampleUserDao userDao;

    /**
     * Creates the WelcomeController.
     *
     * @param userDao
     */
    private WelcomeController(final ExampleUserDao userDao) {
        Validate.notNull(userDao);
        this.userDao = userDao;
    }

    /**
     * @throws IOException
     */
    @RequestMapping(method = RequestMethod.GET)
    @ResponseStatus(value = HttpStatus.OK)
    public ModelAndView getIndex() throws IOException {
        ModelAndView out;

        Authentication auth = SecurityContextHolder.getContext().getAuthentication();
        ExampleUserDetails principal = (ExampleUserDetails) auth.getPrincipal();

        String username = principal.getUsername();
        if (username == null) {
            out = new ModelAndView("newuser");
            out.addObject("twitterUsername", principal.getAccessToken().getScreenName());
        } else {
            out = new ModelAndView("welcome");
            out.addObject("username", username);
        }

        return out;
    }

    /**
     * Join!
     * 
     * @param username
     * @return
     * @throws IOException
     */
    @RequestMapping(method = RequestMethod.POST)
    @ResponseStatus(value = HttpStatus.OK)
    public ModelAndView doPost(@RequestParam(value = "username", required = true) final String username)
            throws IOException {
        Authentication auth = SecurityContextHolder.getContext().getAuthentication();
        ExampleUserDetails principal = (ExampleUserDetails) auth.getPrincipal();

        ExampleUser user = new ExampleUser();
        user.setUsername(username);
        user.setAccessToken(principal.getAccessToken());

        userDao.save(user);

        SecurityContextHolder.clearContext();

        return new ModelAndView("index");
    }

}