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