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      1 /*
      2  * Copyright (C) 2017 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.settingslib.suggestions;
     18 
     19 import android.content.Intent;
     20 import android.util.ArrayMap;
     21 import android.util.ArraySet;
     22 
     23 import com.android.settingslib.drawer.Tile;
     24 
     25 import java.util.ArrayList;
     26 import java.util.List;
     27 import java.util.Map;
     28 import java.util.Set;
     29 
     30 public class SuggestionList {
     31     // Category -> list of suggestion map
     32     private final Map<SuggestionCategory, List<Tile>> mSuggestions;
     33 
     34     // A flatten list of all suggestions.
     35     private List<Tile> mSuggestionList;
     36 
     37     public SuggestionList() {
     38         mSuggestions = new ArrayMap<>();
     39     }
     40 
     41     public void addSuggestions(SuggestionCategory category, List<Tile> suggestions) {
     42         mSuggestions.put(category, suggestions);
     43     }
     44 
     45     public List<Tile> getSuggestions() {
     46         if (mSuggestionList != null) {
     47             return mSuggestionList;
     48         }
     49         mSuggestionList = new ArrayList<>();
     50         for (List<Tile> suggestions : mSuggestions.values()) {
     51             mSuggestionList.addAll(suggestions);
     52         }
     53         dedupeSuggestions(mSuggestionList);
     54         return mSuggestionList;
     55     }
     56 
     57     public boolean isExclusiveSuggestionCategory() {
     58         if (mSuggestions.size() != 1) {
     59             // If there is no category, or more than 1 category, it's not exclusive by definition.
     60             return false;
     61         }
     62         for (SuggestionCategory category : mSuggestions.keySet()) {
     63             if (category.exclusive) {
     64                 return true;
     65             }
     66         }
     67         return false;
     68     }
     69 
     70     /**
     71      * Filter suggestions list so they are all unique.
     72      */
     73     private void dedupeSuggestions(List<Tile> suggestions) {
     74         final Set<String> intents = new ArraySet<>();
     75         for (int i = suggestions.size() - 1; i >= 0; i--) {
     76             final Tile suggestion = suggestions.get(i);
     77             final String intentUri = suggestion.intent.toUri(Intent.URI_INTENT_SCHEME);
     78             if (intents.contains(intentUri)) {
     79                 suggestions.remove(i);
     80             } else {
     81                 intents.add(intentUri);
     82             }
     83         }
     84     }
     85 }
     86