1/*
2 * Copyright (C) 2016 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
17package com.android.tv.analytics;
18
19import android.content.Context;
20import android.os.Handler;
21import android.os.Looper;
22import android.support.annotation.MainThread;
23import com.android.tv.data.ChannelDataManager;
24import com.android.tv.data.api.Channel;
25import com.android.tv.util.RecurringRunner;
26import java.util.List;
27import java.util.concurrent.TimeUnit;
28
29/**
30 * Periodically sends analytics data with the channel count.
31 *
32 * <p>
33 *
34 * <p>This should only be started from a user activity like {@link com.android.tv.MainActivity}.
35 */
36@MainThread
37public class SendChannelStatusRunnable implements Runnable {
38    private static final long SEND_CHANNEL_STATUS_INTERVAL_MS = TimeUnit.DAYS.toMillis(1);
39
40    public static RecurringRunner startChannelStatusRecurringRunner(
41            Context context, Tracker tracker, ChannelDataManager channelDataManager) {
42
43        final SendChannelStatusRunnable sendChannelStatusRunnable =
44                new SendChannelStatusRunnable(channelDataManager, tracker);
45
46        Runnable onStopRunnable =
47                new Runnable() {
48                    @Override
49                    public void run() {
50                        sendChannelStatusRunnable.setDbLoadListener(null);
51                    }
52                };
53        final RecurringRunner recurringRunner =
54                new RecurringRunner(
55                        context,
56                        SEND_CHANNEL_STATUS_INTERVAL_MS,
57                        sendChannelStatusRunnable,
58                        onStopRunnable);
59
60        if (channelDataManager.isDbLoadFinished()) {
61            sendChannelStatusRunnable.setDbLoadListener(null);
62            recurringRunner.start();
63        } else {
64            // Start the recurring runnable after the channel DB is finished loading.
65            sendChannelStatusRunnable.setDbLoadListener(
66                    new ChannelDataManager.Listener() {
67                        @Override
68                        public void onLoadFinished() {
69                            // This is called inside an iterator of Listeners so the remove step is
70                            // done
71                            // via a post on the main thread
72                            new Handler(Looper.getMainLooper())
73                                    .post(
74                                            new Runnable() {
75                                                @Override
76                                                public void run() {
77                                                    sendChannelStatusRunnable.setDbLoadListener(
78                                                            null);
79                                                }
80                                            });
81                            recurringRunner.start();
82                        }
83
84                        @Override
85                        public void onChannelListUpdated() {}
86
87                        @Override
88                        public void onChannelBrowsableChanged() {}
89                    });
90        }
91        return recurringRunner;
92    }
93
94    private final ChannelDataManager mChannelDataManager;
95    private final Tracker mTracker;
96    private ChannelDataManager.Listener mListener;
97
98    private SendChannelStatusRunnable(ChannelDataManager channelDataManager, Tracker tracker) {
99        mChannelDataManager = channelDataManager;
100        mTracker = tracker;
101    }
102
103    @Override
104    public void run() {
105        int browsableChannelCount = 0;
106        List<Channel> channelList = mChannelDataManager.getChannelList();
107        for (Channel channel : channelList) {
108            if (channel.isBrowsable()) {
109                ++browsableChannelCount;
110            }
111        }
112        mTracker.sendChannelCount(browsableChannelCount, channelList.size());
113    }
114
115    private void setDbLoadListener(ChannelDataManager.Listener listener) {
116        if (mListener != null) {
117            mChannelDataManager.removeListener(mListener);
118        }
119        mListener = listener;
120        if (listener != null) {
121            mChannelDataManager.addListener(listener);
122        }
123    }
124}
125