1 /*
2  * Copyright (C) 2015 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.tv.recommendation;
18 
19 import android.content.Context;
20 import android.support.annotation.GuardedBy;
21 import android.support.annotation.VisibleForTesting;
22 
23 import com.android.tv.TvSingletons;
24 import com.android.tv.data.ProgramDataManager;
25 import com.android.tv.data.api.Channel;
26 import com.android.tv.data.api.Program;
27 
28 import java.util.ArrayDeque;
29 import java.util.Deque;
30 
31 public class ChannelRecord {
32     // TODO: decide the value for max history size.
33     @VisibleForTesting static final int MAX_HISTORY_SIZE = 100;
34     private final Context mContext;
35 
36     @GuardedBy("this")
37     private final Deque<WatchedProgram> mWatchHistory;
38 
39     private Program mCurrentProgram;
40     private Channel mChannel;
41     private long mTotalWatchDurationMs;
42     private boolean mInputRemoved;
43 
ChannelRecord(Context context, Channel channel, boolean inputRemoved)44     public ChannelRecord(Context context, Channel channel, boolean inputRemoved) {
45         mContext = context;
46         mChannel = channel;
47         mWatchHistory = new ArrayDeque<>();
48         mInputRemoved = inputRemoved;
49     }
50 
getChannel()51     public Channel getChannel() {
52         return mChannel;
53     }
54 
setChannel(Channel channel, boolean inputRemoved)55     public void setChannel(Channel channel, boolean inputRemoved) {
56         mChannel = channel;
57         mInputRemoved = inputRemoved;
58     }
59 
isInputRemoved()60     public boolean isInputRemoved() {
61         return mInputRemoved;
62     }
63 
setInputRemoved(boolean removed)64     public void setInputRemoved(boolean removed) {
65         mInputRemoved = removed;
66     }
67 
getLastWatchEndTimeMs()68     public synchronized long getLastWatchEndTimeMs() {
69         WatchedProgram p = mWatchHistory.peekLast();
70         return (p == null) ? 0 : p.getWatchEndTimeMs();
71     }
72 
getCurrentProgram()73     public Program getCurrentProgram() {
74         long time = System.currentTimeMillis();
75         if (mCurrentProgram == null || mCurrentProgram.getEndTimeUtcMillis() < time) {
76             ProgramDataManager manager =
77                     TvSingletons.getSingletons(mContext).getProgramDataManager();
78             mCurrentProgram = manager.getCurrentProgram(mChannel.getId());
79         }
80         return mCurrentProgram;
81     }
82 
getTotalWatchDurationMs()83     public long getTotalWatchDurationMs() {
84         return mTotalWatchDurationMs;
85     }
86 
getWatchHistory()87     public final synchronized WatchedProgram[] getWatchHistory() {
88         return mWatchHistory.toArray(new WatchedProgram[mWatchHistory.size()]);
89     }
90 
logWatchHistory(WatchedProgram p)91     public synchronized void logWatchHistory(WatchedProgram p) {
92         mWatchHistory.offer(p);
93         mTotalWatchDurationMs += p.getWatchedDurationMs();
94         if (mWatchHistory.size() > MAX_HISTORY_SIZE) {
95             WatchedProgram program = mWatchHistory.poll();
96             mTotalWatchDurationMs -= program.getWatchedDurationMs();
97         }
98     }
99 }
100