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/*
* Copyright (C) 2015 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.recommendation;
import android.content.Context;
import com.android.tv.data.Channel;
import com.android.tv.testing.Utils;
import org.mockito.Matchers;
import org.mockito.Mockito;
import org.mockito.invocation.InvocationOnMock;
import org.mockito.stubbing.Answer;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Random;
import java.util.TreeMap;
import java.util.concurrent.TimeUnit;
public class RecommendationUtils {
private static final long INVALID_CHANNEL_ID = -1;
/**
* Create a mock RecommendationDataManager backed by a {@link ChannelRecordSortedMapHelper}.
*/
public static RecommendationDataManager createMockRecommendationDataManager(
final ChannelRecordSortedMapHelper channelRecordSortedMap) {
RecommendationDataManager dataManager = Mockito.mock(RecommendationDataManager.class);
Mockito.doAnswer(new Answer<Integer>() {
@Override
public Integer answer(InvocationOnMock invocation) throws Throwable {
return channelRecordSortedMap.size();
}
}).when(dataManager).getChannelRecordCount();
Mockito.doAnswer(new Answer<Collection<ChannelRecord>>() {
@Override
public Collection<ChannelRecord> answer(InvocationOnMock invocation) throws Throwable {
return channelRecordSortedMap.values();
}
}).when(dataManager).getChannelRecords();
Mockito.doAnswer(new Answer<ChannelRecord>() {
@Override
public ChannelRecord answer(InvocationOnMock invocation) throws Throwable {
long channelId = (long) invocation.getArguments()[0];
return channelRecordSortedMap.get(channelId);
}
}).when(dataManager).getChannelRecord(Matchers.anyLong());
return dataManager;
}
public static class ChannelRecordSortedMapHelper extends TreeMap<Long, ChannelRecord> {
private final Context mContext;
private Recommender mRecommender;
private Random mRandom = Utils.createTestRandom();
public ChannelRecordSortedMapHelper(Context context) {
mContext = context;
}
public void setRecommender(Recommender recommender) {
mRecommender = recommender;
}
public void resetRandom(Random random) {
mRandom = random;
}
/**
* Add new {@code numberOfChannels} channels by adding channel record to
* {@code channelRecordMap} with no history.
* This action corresponds to loading channels in the RecommendationDataManger.
*/
public void addChannels(int numberOfChannels) {
for (int i = 0; i < numberOfChannels; ++i) {
addChannel();
}
}
/**
* Add new one channel by adding channel record to {@code channelRecordMap} with no history.
* This action corresponds to loading one channel in the RecommendationDataManger.
*
* @return The new channel was made by this method.
*/
public Channel addChannel() {
long channelId = size();
Channel channel = new Channel.Builder().setId(channelId).build();
ChannelRecord channelRecord = new ChannelRecord(mContext, channel, false);
put(channelId, channelRecord);
return channel;
}
/**
* Add the watch logs which its durationTime is under {@code maxWatchDurationMs}.
* Add until latest watch end time becomes bigger than {@code watchEndTimeMs},
* starting from {@code watchStartTimeMs}.
*
* @return true if adding watch log success, otherwise false.
*/
public boolean addRandomWatchLogs(long watchStartTimeMs, long watchEndTimeMs,
long maxWatchDurationMs) {
long latestWatchEndTimeMs = watchStartTimeMs;
long previousChannelId = INVALID_CHANNEL_ID;
List<Long> channelIdList = new ArrayList<>(keySet());
while (latestWatchEndTimeMs < watchEndTimeMs) {
long channelId = channelIdList.get(mRandom.nextInt(channelIdList.size()));
if (previousChannelId == channelId) {
// Time hopping with random minutes.
latestWatchEndTimeMs += TimeUnit.MINUTES.toMillis(mRandom.nextInt(30) + 1);
}
long watchedDurationMs = mRandom.nextInt((int) maxWatchDurationMs) + 1;
if (!addWatchLog(channelId, latestWatchEndTimeMs, watchedDurationMs)) {
return false;
}
latestWatchEndTimeMs += watchedDurationMs;
previousChannelId = channelId;
}
return true;
}
/**
* Add new watch log to channel that id is {@code ChannelId}. Add watch log starts from
* {@code watchStartTimeMs} with duration {@code durationTimeMs}. If adding is finished,
* notify the recommender that there's a new watch log.
*
* @return true if adding watch log success, otherwise false.
*/
public boolean addWatchLog(long channelId, long watchStartTimeMs, long durationTimeMs) {
ChannelRecord channelRecord = get(channelId);
if (channelRecord == null ||
watchStartTimeMs + durationTimeMs > System.currentTimeMillis()) {
return false;
}
channelRecord.logWatchHistory(new WatchedProgram(null, watchStartTimeMs,
watchStartTimeMs + durationTimeMs));
if (mRecommender != null) {
mRecommender.onNewWatchLog(channelRecord);
}
return true;
}
}
}
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