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/*
* Copyright (C) 2016 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.android.tv.dvr;
import android.content.Context;
import android.content.SharedPreferences;
import android.media.tv.TvInputManager;
import android.support.annotation.IntDef;
import com.android.tv.common.SharedPreferencesUtils;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.CopyOnWriteArraySet;
/**
* A class to manage DVR watched state.
* It will remember and provides previous watched position of DVR playback.
*/
public class DvrWatchedPositionManager {
private final static String TAG = "DvrWatchedPositionManager";
private final boolean DEBUG = false;
private SharedPreferences mWatchedPositions;
private final Map<Long, Set> mListeners = new HashMap<>();
/**
* The minimum percentage of recorded program being watched that will be considered as being
* completely watched.
*/
public static final float DVR_WATCHED_THRESHOLD_RATE = 0.98f;
@Retention(RetentionPolicy.SOURCE)
@IntDef({DVR_WATCHED_STATUS_NEW, DVR_WATCHED_STATUS_WATCHING, DVR_WATCHED_STATUS_WATCHED})
public @interface DvrWatchedStatus {}
/**
* The status indicates the recorded program has not been watched at all.
*/
public static final int DVR_WATCHED_STATUS_NEW = 0;
/**
* The status indicates the recorded program is being watched.
*/
public static final int DVR_WATCHED_STATUS_WATCHING = 1;
/**
* The status indicates the recorded program was completely watched.
*/
public static final int DVR_WATCHED_STATUS_WATCHED = 2;
public DvrWatchedPositionManager(Context context) {
mWatchedPositions = context.getSharedPreferences(
SharedPreferencesUtils.SHARED_PREF_DVR_WATCHED_POSITION, Context.MODE_PRIVATE);
}
/**
* Sets the watched position of the give program.
*/
public void setWatchedPosition(long recordedProgramId, long positionMs) {
mWatchedPositions.edit().putLong(Long.toString(recordedProgramId), positionMs).apply();
notifyWatchedPositionChanged(recordedProgramId, positionMs);
}
/**
* Gets the watched position of the give program.
*/
public long getWatchedPosition(long recordedProgramId) {
return mWatchedPositions.getLong(Long.toString(recordedProgramId),
TvInputManager.TIME_SHIFT_INVALID_TIME);
}
@DvrWatchedStatus public int getWatchedStatus(RecordedProgram recordedProgram) {
long watchedPosition = getWatchedPosition(recordedProgram.getId());
if (watchedPosition == TvInputManager.TIME_SHIFT_INVALID_TIME) {
return DVR_WATCHED_STATUS_NEW;
} else if (watchedPosition > recordedProgram
.getDurationMillis() * DVR_WATCHED_THRESHOLD_RATE) {
return DVR_WATCHED_STATUS_WATCHED;
} else {
return DVR_WATCHED_STATUS_WATCHING;
}
}
/**
* Adds {@link WatchedPositionChangedListener}.
*/
public void addListener(WatchedPositionChangedListener listener, long recordedProgramId) {
if (recordedProgramId == RecordedProgram.ID_NOT_SET) {
return;
}
Set<WatchedPositionChangedListener> listenerSet = mListeners.get(recordedProgramId);
if (listenerSet == null) {
listenerSet = new CopyOnWriteArraySet<>();
mListeners.put(recordedProgramId, listenerSet);
}
listenerSet.add(listener);
}
/**
* Removes {@link WatchedPositionChangedListener}.
*/
public void removeListener(WatchedPositionChangedListener listener) {
for (long recordedProgramId : new ArrayList<>(mListeners.keySet())) {
removeListener(listener, recordedProgramId);
}
}
/**
* Removes {@link WatchedPositionChangedListener}.
*/
public void removeListener(WatchedPositionChangedListener listener, long recordedProgramId) {
Set<WatchedPositionChangedListener> listenerSet = mListeners.get(recordedProgramId);
if (listenerSet == null) {
return;
}
listenerSet.remove(listener);
if (listenerSet.isEmpty()) {
mListeners.remove(recordedProgramId);
}
}
private void notifyWatchedPositionChanged(long recordedProgramId, long positionMs) {
Set<WatchedPositionChangedListener> listenerSet = mListeners.get(recordedProgramId);
if (listenerSet == null) {
return;
}
for (WatchedPositionChangedListener listener : listenerSet) {
listener.onWatchedPositionChanged(recordedProgramId, positionMs);
}
}
public interface WatchedPositionChangedListener {
/**
* Called when the watched position of some program is changed.
*/
void onWatchedPositionChanged(long recordedProgramId, long positionMs);
}
}
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