1 /*
2  * Copyright (C) 2019 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.twopanelsettings.slices;
18 
19 import android.app.slice.SliceManager;
20 import android.content.Context;
21 import android.net.Uri;
22 import android.util.ArrayMap;
23 import android.util.Log;
24 
25 import com.android.tv.twopanelsettings.slices.PreferenceSliceLiveData.SliceLiveDataImpl;
26 
27 
28 /**
29  * Ensure the SliceLiveData with same uri is created only once across the activity.
30  */
31 public class ContextSingleton {
32     private static final String TAG = "TvSettingsContext";
33     private static ContextSingleton sInstance;
34     private ArrayMap<Uri, SliceLiveDataImpl> mSliceMap;
35     private boolean mGivenFullSliceAccess;
36 
37     /**
38      * Get the instance.
39      */
getInstance()40     public static ContextSingleton getInstance() {
41         if (sInstance == null) {
42             sInstance = new ContextSingleton();
43         }
44         return sInstance;
45     }
46 
ContextSingleton()47     private ContextSingleton() {
48         mSliceMap = new ArrayMap<>();
49         mGivenFullSliceAccess = false;
50     }
51 
52     /**
53      * Get the corresponding SliceLiveData based on the uri.
54      */
getSliceLiveData(Context context, Uri uri)55     public SliceLiveDataImpl getSliceLiveData(Context context, Uri uri) {
56         if (!mSliceMap.containsKey(uri)) {
57             mSliceMap.put(uri, PreferenceSliceLiveData.fromUri(context, uri));
58         }
59 
60         return mSliceMap.get(uri);
61     }
62 
63     /**
64      *  Grant full access to current package.
65      */
grantFullAccess(Context ctx, Uri uri)66     public void grantFullAccess(Context ctx, Uri uri) {
67         if (!mGivenFullSliceAccess) {
68             String currentPackageName = ctx.getApplicationContext().getPackageName();
69             // Uri cannot be null here as SliceManagerService calls notifyChange(uri, null) in
70             // grantPermissionFromUser.
71             ctx.getSystemService(SliceManager.class).grantPermissionFromUser(
72                     uri, currentPackageName, true);
73             mGivenFullSliceAccess = true;
74         }
75     }
76 
77     /**
78      *  Grant full access to specific package.
79      */
grantFullAccess(Context ctx, String uri, String packageName)80     public void grantFullAccess(Context ctx, String uri, String packageName) {
81         try {
82             ctx.getSystemService(SliceManager.class).grantPermissionFromUser(
83                     Uri.parse(uri), packageName, true);
84         } catch (Exception e) {
85             Log.e(TAG, "Cannot grant full access to " + packageName + " " + e);
86         }
87     }
88 }
89