/*
    * Licensed to The Apereo Foundation under one or more contributor license
    * agreements. See the NOTICE file distributed with this work for additional
    * information regarding copyright ownership.
    *
    *
    * The Apereo Foundation licenses this file to you under the Educational
    * Community 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://opensource.org/licenses/ecl2.txt
   *
   * 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.opencastproject.assetmanager.api.fn;
  
  import org.opencastproject.assetmanager.api.Property;
  import org.opencastproject.assetmanager.api.Snapshot;
  import org.opencastproject.assetmanager.api.query.ARecord;
  
  import java.util.LinkedHashSet;
  import java.util.List;
  import java.util.stream.Collectors;
  
  /**
   * Functions to deal with {@link ARecord}s.
   */
  public final class ARecords {
    public static String getMediaPackageId(LinkedHashSet<ARecord> records) {
      return records.stream()
          .map(r -> r.getMediaPackageId())
          .findFirst()
          .get();
  
    }
  
    public static List<Property> getProperties(LinkedHashSet<ARecord> records) {
      return records.stream()
          .map(r -> r.getProperties())
          .flatMap(List::stream)
          .collect(Collectors.toList());
    };
  
    public static boolean hasProperties(ARecord record) {
      return record.getProperties().isEmpty();
    }
  
    /**
     * Get the snapshot from a record.
     *
     * @see ARecord#getSnapshot()
     */
    public static List<Snapshot> getSnapshot(LinkedHashSet<ARecord> records) {
      return records.stream()
          .map(r -> r.getSnapshot())
          .filter(s -> s.isPresent())
          .map(s -> s.get())
          .collect(Collectors.toList());
  
    }
  
    private ARecords() {
    }
  }