1 /*
2  * Copyright (C) 2018 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.settings.wifi.slice;
18 
19 import android.content.Context;
20 import android.net.NetworkCapabilities;
21 import android.net.Uri;
22 import android.net.wifi.WifiInfo;
23 import android.net.wifi.WifiManager;
24 import android.net.wifi.WifiSsid;
25 import android.text.TextUtils;
26 import android.util.Log;
27 
28 import androidx.annotation.VisibleForTesting;
29 import androidx.slice.Slice;
30 
31 import com.android.settings.overlay.FeatureFactory;
32 import com.android.settings.slices.CustomSliceRegistry;
33 import com.android.settings.slices.CustomSliceable;
34 
35 /**
36  * {@link CustomSliceable} for Wi-Fi, used by contextual homepage.
37  */
38 public class ContextualWifiSlice extends WifiSlice {
39 
40     private static final String TAG = "ContextualWifiSlice";
41     @VisibleForTesting
42     static long sActiveUiSession = -1000;
43     @VisibleForTesting
44     static boolean sPreviouslyDisplayed;
45 
ContextualWifiSlice(Context context)46     public ContextualWifiSlice(Context context) {
47         super(context);
48     }
49 
50     @Override
getUri()51     public Uri getUri() {
52         return CustomSliceRegistry.CONTEXTUAL_WIFI_SLICE_URI;
53     }
54 
55     @Override
getSlice()56     public Slice getSlice() {
57         final long currentUiSession = FeatureFactory.getFactory(mContext)
58                 .getSlicesFeatureProvider().getUiSessionToken();
59         if (currentUiSession != sActiveUiSession) {
60             sActiveUiSession = currentUiSession;
61             sPreviouslyDisplayed = false;
62         }
63         if (!sPreviouslyDisplayed && hasWorkingNetwork()) {
64             Log.d(TAG, "Wifi is connected, no point showing any suggestion.");
65             return null;
66         }
67         // Set sPreviouslyDisplayed to true - we will show *something* on the screen. So we should
68         // keep showing this card to keep UI stable, even if wifi connects to a network later.
69         sPreviouslyDisplayed = true;
70 
71         return super.getSlice();
72     }
73 
hasWorkingNetwork()74     private boolean hasWorkingNetwork() {
75         return !TextUtils.equals(getActiveSSID(), WifiSsid.NONE) && hasInternetAccess();
76     }
77 
getActiveSSID()78     private String getActiveSSID() {
79         if (mWifiManager.getWifiState() != WifiManager.WIFI_STATE_ENABLED) {
80             return WifiSsid.NONE;
81         }
82         return WifiInfo.removeDoubleQuotes(mWifiManager.getConnectionInfo().getSSID());
83     }
84 
hasInternetAccess()85     private boolean hasInternetAccess() {
86         final NetworkCapabilities nc = mConnectivityManager.getNetworkCapabilities(
87                 mWifiManager.getCurrentNetwork());
88         return nc != null
89                 && !nc.hasCapability(NetworkCapabilities.NET_CAPABILITY_CAPTIVE_PORTAL)
90                 && !nc.hasCapability(NetworkCapabilities.NET_CAPABILITY_PARTIAL_CONNECTIVITY)
91                 && nc.hasCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED);
92     }
93 
94     @Override
getBackgroundWorkerClass()95     public Class getBackgroundWorkerClass() {
96         return ContextualWifiScanWorker.class;
97     }
98 }
99