content: /*
   * Copyright (C) 2017 The Android Open Source Project
   *
   * 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 com.google.android.exoplayer2.drm;
  
  import android.util.Pair;
  import com.google.android.exoplayer2.C;
  import java.util.Map;
  
  /**
   * Utility methods for Widevine.
   */
  public final class WidevineUtil {
  
    /** Widevine specific key status field name for the remaining license duration, in seconds. */
    public static final String PROPERTY_LICENSE_DURATION_REMAINING = "LicenseDurationRemaining";
    /** Widevine specific key status field name for the remaining playback duration, in seconds. */
    public static final String PROPERTY_PLAYBACK_DURATION_REMAINING = "PlaybackDurationRemaining";
  
    private WidevineUtil() {}
  
    /**
     * Returns license and playback durations remaining in seconds.
     *
     * @param drmSession The drm session to query.
     * @return A {@link Pair} consisting of the remaining license and playback durations in seconds,
     *     or null if called before the session has been opened or after it's been released.
     */
    public static Pair<Long, Long> getLicenseDurationRemainingSec(DrmSession<?> drmSession) {
      Map<String, String> keyStatus = drmSession.queryKeyStatus();
      if (keyStatus == null) {
        return null;
      }
      return new Pair<>(getDurationRemainingSec(keyStatus, PROPERTY_LICENSE_DURATION_REMAINING),
          getDurationRemainingSec(keyStatus, PROPERTY_PLAYBACK_DURATION_REMAINING));
    }
  
    private static long getDurationRemainingSec(Map<String, String> keyStatus, String property) {
      if (keyStatus != null) {
        try {
          String value = keyStatus.get(property);
          if (value != null) {
            return Long.parseLong(value);
          }
        } catch (NumberFormatException e) {
          // do nothing.
        }
      }
      return C.TIME_UNSET;
    }
  
  }
  