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      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 import android.support.annotation.Nullable;
     24 import android.text.TextUtils;
     25 
     26 import com.android.tv.R;
     27 import com.android.tv.parental.ContentRatingSystem.Rating;
     28 import com.android.tv.parental.ContentRatingSystem.SubRating;
     29 
     30 import java.util.ArrayList;
     31 import java.util.List;
     32 
     33 public class ContentRatingsManager {
     34     private final List<ContentRatingSystem> mContentRatingSystems = new ArrayList<>();
     35 
     36     private final Context mContext;
     37 
     38     public ContentRatingsManager(Context context) {
     39         mContext = context;
     40     }
     41 
     42     public void update() {
     43         mContentRatingSystems.clear();
     44 
     45         TvInputManager manager =
     46                 (TvInputManager) mContext.getSystemService(Context.TV_INPUT_SERVICE);
     47         ContentRatingsParser parser = new ContentRatingsParser(mContext);
     48 
     49         List<TvContentRatingSystemInfo> infos = manager.getTvContentRatingSystemList();
     50         for (TvContentRatingSystemInfo info : infos) {
     51             List<ContentRatingSystem> list = parser.parse(info);
     52             if (list != null) {
     53                 mContentRatingSystems.addAll(list);
     54             }
     55         }
     56     }
     57 
     58     /**
     59      * Returns the content rating system with the give ID.
     60      */
     61     @Nullable
     62     public ContentRatingSystem getContentRatingSystem(String contentRatingSystemId) {
     63         for (ContentRatingSystem ratingSystem : mContentRatingSystems) {
     64             if (TextUtils.equals(ratingSystem.getId(), contentRatingSystemId)) {
     65                 return ratingSystem;
     66             }
     67         }
     68         return null;
     69     }
     70 
     71     /**
     72      * Returns a new list of all content rating systems defined.
     73      */
     74     public List<ContentRatingSystem> getContentRatingSystems() {
     75         return new ArrayList<>(mContentRatingSystems);
     76     }
     77 
     78     /**
     79      * Returns the long name of a given content rating including descriptors (sub-ratings) that is
     80      * displayed to the user. For example, "TV-PG (L, S)".
     81      */
     82     public String getDisplayNameForRating(TvContentRating canonicalRating) {
     83         if (TvContentRating.UNRATED.equals(canonicalRating)) {
     84             return mContext.getResources().getString(R.string.unrated_rating_name);
     85         }
     86         Rating rating = getRating(canonicalRating);
     87         if (rating == null) {
     88             return null;
     89         }
     90         List<SubRating> subRatings = getSubRatings(rating, canonicalRating);
     91         if (!subRatings.isEmpty()) {
     92             StringBuilder builder = new StringBuilder();
     93             for (SubRating subRating : subRatings) {
     94                 builder.append(subRating.getTitle());
     95                 builder.append(", ");
     96             }
     97             return rating.getTitle() + " (" + builder.substring(0, builder.length() - 2) + ")";
     98         }
     99         return rating.getTitle();
    100     }
    101 
    102     private Rating getRating(TvContentRating canonicalRating) {
    103         if (canonicalRating == null || mContentRatingSystems == null) {
    104             return null;
    105         }
    106         for (ContentRatingSystem system : mContentRatingSystems) {
    107             if (system.getDomain().equals(canonicalRating.getDomain())
    108                     && system.getName().equals(canonicalRating.getRatingSystem())) {
    109                 for (Rating rating : system.getRatings()) {
    110                     if (rating.getName().equals(canonicalRating.getMainRating())) {
    111                         return rating;
    112                     }
    113                 }
    114             }
    115         }
    116         return null;
    117     }
    118 
    119     private List<SubRating> getSubRatings(Rating rating, TvContentRating canonicalRating) {
    120         List<SubRating> subRatings = new ArrayList<>();
    121         if (rating == null || rating.getSubRatings() == null
    122                 || canonicalRating == null || canonicalRating.getSubRatings() == null) {
    123             return subRatings;
    124         }
    125         for (String subRatingString : canonicalRating.getSubRatings()) {
    126             for (SubRating subRating : rating.getSubRatings()) {
    127                 if (subRating.getName().equals(subRatingString)) {
    128                     subRatings.add(subRating);
    129                     break;
    130                 }
    131             }
    132         }
    133         return subRatings;
    134     }
    135 }
    136