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.parental;
18 
19 import android.content.Context;
20 import android.media.tv.TvContentRating;
21 import android.media.tv.TvContentRatingSystemInfo;
22 import android.media.tv.TvInputManager;
23 
24 import com.android.tv.parental.ContentRatingSystem.Rating;
25 import com.android.tv.parental.ContentRatingSystem.SubRating;
26 
27 import java.util.ArrayList;
28 import java.util.List;
29 
30 public class ContentRatingsManager {
31     private final List<ContentRatingSystem> mContentRatingSystems = new ArrayList<>();
32 
33     private final Context mContext;
34 
ContentRatingsManager(Context context)35     public ContentRatingsManager(Context context) {
36         mContext = context;
37     }
38 
update()39     public void update() {
40         mContentRatingSystems.clear();
41 
42         TvInputManager manager =
43                 (TvInputManager) mContext.getSystemService(Context.TV_INPUT_SERVICE);
44         ContentRatingsParser parser = new ContentRatingsParser(mContext);
45 
46         List<TvContentRatingSystemInfo> infos = manager.getTvContentRatingSystemList();
47         for (TvContentRatingSystemInfo info : infos) {
48             List<ContentRatingSystem> list = parser.parse(info);
49             if (list != null) {
50                 mContentRatingSystems.addAll(list);
51             }
52         }
53     }
54 
55     /**
56      * Returns a new list of all content rating systems defined.
57      */
getContentRatingSystems()58     public List<ContentRatingSystem> getContentRatingSystems() {
59         return new ArrayList<>(mContentRatingSystems);
60     }
61 
62     /**
63      * Returns the long name of a given content rating including descriptors (sub-ratings) that is
64      * displayed to the user. For example, "TV-PG (L, S)".
65      */
getDisplayNameForRating(TvContentRating canonicalRating)66     public String getDisplayNameForRating(TvContentRating canonicalRating) {
67         Rating rating = getRating(canonicalRating);
68         if (rating == null) {
69             return null;
70         }
71         List<SubRating> subRatings = getSubRatings(rating, canonicalRating);
72         if (!subRatings.isEmpty()) {
73             StringBuilder builder = new StringBuilder();
74             for (SubRating subRating : subRatings) {
75                 builder.append(subRating.getTitle());
76                 builder.append(", ");
77             }
78             return rating.getTitle() + " (" + builder.substring(0, builder.length() - 2) + ")";
79         }
80         return rating.getTitle();
81     }
82 
getRating(TvContentRating canonicalRating)83     private Rating getRating(TvContentRating canonicalRating) {
84         if (canonicalRating == null || mContentRatingSystems == null) {
85             return null;
86         }
87         for (ContentRatingSystem system : mContentRatingSystems) {
88             if (system.getDomain().equals(canonicalRating.getDomain())
89                     && system.getName().equals(canonicalRating.getRatingSystem())) {
90                 for (Rating rating : system.getRatings()) {
91                     if (rating.getName().equals(canonicalRating.getMainRating())) {
92                         return rating;
93                     }
94                 }
95             }
96         }
97         return null;
98     }
99 
getSubRatings(Rating rating, TvContentRating canonicalRating)100     private List<SubRating> getSubRatings(Rating rating, TvContentRating canonicalRating) {
101         List<SubRating> subRatings = new ArrayList<>();
102         if (rating == null || rating.getSubRatings() == null
103                 || canonicalRating == null || canonicalRating.getSubRatings() == null) {
104             return subRatings;
105         }
106         for (String subRatingString : canonicalRating.getSubRatings()) {
107             for (SubRating subRating : rating.getSubRatings()) {
108                 if (subRating.getName().equals(subRatingString)) {
109                     subRatings.add(subRating);
110                     break;
111                 }
112             }
113         }
114         return subRatings;
115     }
116 }
117