/*
 * MIT License
 *
 * Copyright (c) 2020-present Cloudogu GmbH and Contributors
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package sonia.scm.group;

import sonia.scm.auditlog.AuditEntry;
import sonia.scm.xml.XmlMapMultiStringAdapter;

import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;

import static java.util.Collections.emptySet;

@AuditEntry(ignore = true)
@XmlRootElement(name = "user-group-cache")
@XmlAccessorType(XmlAccessType.FIELD)
class UserGroupCache {
  @XmlJavaTypeAdapter(XmlMapMultiStringAdapter.class)
  private Map<String, Set<String>> cache;

  Set<String> get(String user) {
    if (cache == null) {
      return emptySet();
    }
    return cache.getOrDefault(user, emptySet());
  }

  boolean put(String user, Set<String> groups) {
    if (cache == null) {
      cache = new HashMap<>();
    }
    if (groups.equals(cache.get(user))) {
      return false;
    }
    cache.put(user, groups);
    return true;
  }
}
