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.media.tv.TvContentRating; 20 21 import com.android.tv.parental.ContentRatingSystem.Rating; 22 import com.android.tv.parental.ContentRatingSystem.SubRating; 23 import com.android.tv.util.TvSettings; 24 import com.android.tv.util.TvSettings.ContentRatingLevel; 25 26 import java.util.HashSet; 27 import java.util.Set; 28 29 public class ContentRatingLevelPolicy { 30 private static final int AGE_THRESHOLD_FOR_LEVEL_HIGH = 6; 31 private static final int AGE_THRESHOLD_FOR_LEVEL_MEDIUM = 12; 32 private static final int AGE_THRESHOLD_FOR_LEVEL_LOW = -1; // Highest age for each rating system 33 ContentRatingLevelPolicy()34 private ContentRatingLevelPolicy() { } 35 getRatingsForLevel( ParentalControlSettings settings, ContentRatingsManager manager, @ContentRatingLevel int level)36 public static Set<TvContentRating> getRatingsForLevel( 37 ParentalControlSettings settings, ContentRatingsManager manager, 38 @ContentRatingLevel int level) { 39 if (level == TvSettings.CONTENT_RATING_LEVEL_NONE) { 40 return new HashSet<>(); 41 } else if (level == TvSettings.CONTENT_RATING_LEVEL_HIGH) { 42 return getRatingsForAge(settings, manager, AGE_THRESHOLD_FOR_LEVEL_HIGH); 43 } else if (level == TvSettings.CONTENT_RATING_LEVEL_MEDIUM) { 44 return getRatingsForAge(settings, manager, AGE_THRESHOLD_FOR_LEVEL_MEDIUM); 45 } else if (level == TvSettings.CONTENT_RATING_LEVEL_LOW) { 46 return getRatingsForAge(settings, manager, AGE_THRESHOLD_FOR_LEVEL_LOW); 47 } 48 throw new IllegalArgumentException("Unexpected rating level"); 49 } 50 getRatingsForAge( ParentalControlSettings settings, ContentRatingsManager manager, int age)51 private static Set<TvContentRating> getRatingsForAge( 52 ParentalControlSettings settings, ContentRatingsManager manager, int age) { 53 Set<TvContentRating> ratings = new HashSet<>(); 54 55 for (ContentRatingSystem contentRatingSystem : manager.getContentRatingSystems()) { 56 if (!settings.isContentRatingSystemEnabled(contentRatingSystem)) { 57 continue; 58 } 59 int ageLimit = age; 60 if (ageLimit == AGE_THRESHOLD_FOR_LEVEL_LOW) { 61 ageLimit = getMaxAge(contentRatingSystem); 62 } 63 for (Rating rating : contentRatingSystem.getRatings()) { 64 if (rating.getAgeHint() < ageLimit) { 65 continue; 66 } 67 TvContentRating tvContentRating = TvContentRating.createRating( 68 contentRatingSystem.getDomain(), contentRatingSystem.getName(), 69 rating.getName()); 70 ratings.add(tvContentRating); 71 for (SubRating subRating : rating.getSubRatings()) { 72 tvContentRating = TvContentRating.createRating( 73 contentRatingSystem.getDomain(), contentRatingSystem.getName(), 74 rating.getName(), subRating.getName()); 75 ratings.add(tvContentRating); 76 } 77 } 78 } 79 80 return ratings; 81 } 82 getMaxAge(ContentRatingSystem contentRatingSystem)83 private static int getMaxAge(ContentRatingSystem contentRatingSystem) { 84 int maxAge = 0; 85 for (Rating rating : contentRatingSystem.getRatings()) { 86 if (maxAge < rating.getAgeHint()) { 87 maxAge = rating.getAgeHint(); 88 } 89 } 90 return maxAge; 91 } 92 } 93