HtmlController.java

/**
 * Copyright 2014 Global Crop Diversity Trust
 *
 * 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 org.genesys.server.mvc;

import java.util.HashMap;
import java.util.Locale;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.genesys.server.servlet.filter.LocaleURLFilter;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.ResolvableType;
import org.springframework.security.oauth2.client.registration.ClientRegistration;
import org.springframework.security.oauth2.client.registration.ClientRegistrationRepository;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;

/**
 * Controller which simply handles *.html requests
 */
@Controller
public class HtmlController extends BaseController {

	private static String authorizationRequestBaseUri = "oauth2/authorization";

	@Autowired
	private ClientRegistrationRepository clientRegistrationRepository;

	@RequestMapping("/")
	public String index(HttpServletRequest request) {

		Locale requestLocale = request.getLocale();
		Locale requestedLocale = (Locale) request.getAttribute(LocaleURLFilter.REQUEST_LOCALE_ATTR);
		if (LOG.isDebugEnabled()) {
			LOG.debug("Request locale: {} requested: {}", requestLocale, requestedLocale);
		}

		if (requestedLocale == null && requestLocale != null) {
			LOG.info("Redirecting to request locale: {}", requestLocale.getLanguage());
			return "redirect:/" + requestLocale.getLanguage().toLowerCase() + "/welcome";
		}

		return "redirect:/welcome";
	}

	@RequestMapping(value = "welcome")
	public String welcome(ModelMap model) {
		return "/index";
	}

	@RequestMapping(value = "/login")
	public String login(final ModelMap model) {
		Map<String, String> oauth2AuthenticationUrls = new HashMap<>();

		Iterable<ClientRegistration> clientRegistrations = null;
		ResolvableType type = ResolvableType.forInstance(clientRegistrationRepository).as(Iterable.class);
		if (type != ResolvableType.NONE &&
			ClientRegistration.class.isAssignableFrom(type.resolveGenerics()[0])) {
			clientRegistrations = (Iterable<ClientRegistration>) clientRegistrationRepository;
			clientRegistrations.forEach(registration -> {
				// Add all but self!
				if (! registration.getRegistrationId().equals("local")) {
					oauth2AuthenticationUrls.put(
						registration.getClientName(),
						authorizationRequestBaseUri + "/" + registration.getRegistrationId()
					);
				}
			});
		}

		model.addAttribute("urls", oauth2AuthenticationUrls);
		return "/login";
	}

}