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web support of light framework

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/*
 * Copyright (C) 2020 the original author or authors.
 *
 * 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 vip.justlive.oxygen.web.hook;

import java.util.Locale;
import lombok.extern.slf4j.Slf4j;
import vip.justlive.oxygen.core.CoreConfigKeys;
import vip.justlive.oxygen.core.bean.Bean;
import vip.justlive.oxygen.core.util.base.ResourceBundle;
import vip.justlive.oxygen.core.util.base.Strings;
import vip.justlive.oxygen.web.http.Request;
import vip.justlive.oxygen.web.router.RoutingContext;

/**
 * i18n
 *
 * @author wubo
 */
@Bean
@Slf4j
public class I18nWebHook implements WebHook {

  @Override
  public boolean before(RoutingContext ctx) {
    String paramKey = CoreConfigKeys.I18N_PARAM_KEY.getValue();
    Request request = ctx.request();
    String localeStr = request.getParam(paramKey);
    String sessionKey = CoreConfigKeys.I18N_SESSION_KEY.getValue();
    if (localeStr == null || localeStr.length() == 0) {
      Locale locale = (Locale) request.getSession().get(sessionKey);
      if (locale != null) {
        ResourceBundle.setThreadLocale(locale);
      }
    } else {
      String[] arr = localeStr.split(Strings.UNDERSCORE);
      if (arr.length != 2) {
        log.warn("locale [{}] is incorrect", localeStr);
      } else {
        Locale locale = new Locale(arr[0], arr[1]);
        if (log.isDebugEnabled()) {
          log.debug("change locale from [{}] to [{}]", ResourceBundle.currentThreadLocale(),
              locale);
        }
        request.getSession().put(sessionKey, locale);
        ResourceBundle.setThreadLocale(locale);
      }
    }
    return true;
  }

  @Override
  public void finished(RoutingContext ctx) {
    ResourceBundle.clearThreadLocale();
  }
}