Package org.cyclop.service.um.intern

Source Code of org.cyclop.service.um.intern.CookieBasedUserManager

/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements.  See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.cyclop.service.um.intern;

import java.util.Optional;

import javax.inject.Inject;
import javax.inject.Named;

import org.cyclop.model.UserIdentifier;
import org.cyclop.model.UserPreferences;
import org.cyclop.service.common.CookieStorage;
import org.cyclop.service.um.UserManager;
import org.cyclop.validation.EnableValidation;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/** @author Maciej Miklas */
@Named
@EnableValidation
public class CookieBasedUserManager implements UserManager {

  private final static Logger LOG = LoggerFactory.getLogger(CookieBasedUserManager.class);

  @Inject
  private CookieStorage cookieStorage;

  @Override
  public boolean storePreferences(UserPreferences preferences) {
    UserPreferences readPrefs = readPreferences();
    if (readPrefs.equals(preferences)) {
      LOG.debug("Preferences did not change - no update required {}", preferences);
      return false;
    }
    LOG.debug("Updating preferences {}", preferences);
    cookieStorage.storeCookieAsJson(CookieStorage.CookieName.cyclop_prefs, preferences);
    return true;
  }

  @Override
  public UserPreferences readPreferences() {
    Optional<UserPreferences> preferencesOpt = cookieStorage.readCookieAsJson(
        CookieStorage.CookieName.cyclop_prefs, UserPreferences.class);
    UserPreferences preferences = preferencesOpt.orElseGet(UserPreferences::new);
    if (!preferencesOpt.isPresent()) {
      LOG.debug("User preferences not found as cookie - using default");
    }
    return preferences;
  }

  @Override
  public void storeIdentifier(UserIdentifier id) {
    cookieStorage.storeCookieAsJson(CookieStorage.CookieName.cyclop_userid, new UserIdentifierCookie(id));
  }

  @Override
  public UserIdentifier readIdentifier() {
    UserIdentifier id = null;
    Optional<UserIdentifierCookie> cookie = cookieStorage.readCookieAsJson(CookieStorage.CookieName.cyclop_userid,
        UserIdentifierCookie.class);
    if (!cookie.isPresent()) {
      id = new UserIdentifier();
      storeIdentifier(id);
      LOG.info("Generated new User Identifier: " + id.id);
    } else {
      id = cookie.get().getId();
    }

    return id;
  }
}
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