1 /*
2  * Copyright (C) 2022 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.development;
18 
19 import android.content.Context;
20 import android.os.SystemProperties;
21 import android.util.Log;
22 
23 import androidx.annotation.Nullable;
24 import androidx.annotation.VisibleForTesting;
25 import androidx.preference.Preference;
26 import androidx.preference.TwoStatePreference;
27 
28 import com.android.settingslib.development.DeveloperOptionsPreferenceController;
29 
30 /**
31  * Preference controller to control NFCSNOOP data payload
32  */
33 public class NfcSnoopLogPreferenceController extends
34         DeveloperOptionsPreferenceController implements Preference.OnPreferenceChangeListener {
35     private static final String TAG = "NfcSnoopLog";
36     private static final String NFC_NFCSNOOP_LOG_KEY =
37             "nfc_snoop_log";
38     @VisibleForTesting
39     static final String NFC_NFCSNOOP_LOG_MODE_PROPERTY =
40             "persist.nfc.snoop_log_mode";
41     @VisibleForTesting
42     static final String NFCSNOOP_MODE_FILTERED = "filtered";
43     @VisibleForTesting
44     static final String NFCSNOOP_MODE_FULL = "full";
45 
46     @VisibleForTesting
47     boolean mChanged = false;
48 
49     @Nullable private final DevelopmentSettingsDashboardFragment mFragment;
50 
NfcSnoopLogPreferenceController(Context context, @Nullable DevelopmentSettingsDashboardFragment fragment)51     public NfcSnoopLogPreferenceController(Context context,
52             @Nullable DevelopmentSettingsDashboardFragment fragment) {
53         super(context);
54         mFragment = fragment;
55     }
56 
57     @Override
getPreferenceKey()58     public String getPreferenceKey() {
59         return NFC_NFCSNOOP_LOG_KEY;
60     }
61 
62     @Override
onPreferenceChange(Preference preference, Object newValue)63     public boolean onPreferenceChange(Preference preference, Object newValue) {
64         NfcRebootDialog.show(mFragment);
65         mChanged = true;
66         return false;
67     }
68 
69     @Override
updateState(Preference preference)70     public void updateState(Preference preference) {
71         try {
72             final String currentValue = SystemProperties.get(NFC_NFCSNOOP_LOG_MODE_PROPERTY);
73             ((TwoStatePreference) mPreference).setChecked(currentValue.equals(NFCSNOOP_MODE_FULL));
74         } catch (RuntimeException e) {
75             Log.e(TAG, "Fail to get nfc system property: " + e.getMessage());
76         }
77     }
78 
79     @Override
onDeveloperOptionsSwitchDisabled()80     protected void onDeveloperOptionsSwitchDisabled() {
81         super.onDeveloperOptionsSwitchDisabled();
82         try {
83             SystemProperties.set(NFC_NFCSNOOP_LOG_MODE_PROPERTY, NFCSNOOP_MODE_FILTERED);
84             ((TwoStatePreference) mPreference).setChecked(false);
85         } catch (RuntimeException e) {
86             Log.e(TAG, "Fail to set nfc system property: " + e.getMessage());
87         }
88     }
89 
90     /**
91      * Check whether the current setting is the default value or not.
92      */
isDefaultValue()93     public boolean isDefaultValue() {
94         try {
95             final String currentValue = SystemProperties.get(NFC_NFCSNOOP_LOG_MODE_PROPERTY);
96             return !currentValue.equals(NFCSNOOP_MODE_FULL);
97         } catch (RuntimeException e) {
98             Log.e(TAG, "Fail to get nfc system property: " + e.getMessage());
99         }
100         return true;
101     }
102 
103     /**
104      * Called when the NfcRebootDialog confirm is clicked.
105      */
onNfcRebootDialogConfirmed()106     public void onNfcRebootDialogConfirmed() {
107         if (!mChanged) {
108             return;
109         }
110         try {
111             final String currentValue =
112                     SystemProperties.get(NFC_NFCSNOOP_LOG_MODE_PROPERTY, NFCSNOOP_MODE_FILTERED);
113             if (currentValue.equals(NFCSNOOP_MODE_FILTERED)) {
114                 SystemProperties.set(NFC_NFCSNOOP_LOG_MODE_PROPERTY, NFCSNOOP_MODE_FULL);
115             } else {
116                 SystemProperties.set(NFC_NFCSNOOP_LOG_MODE_PROPERTY, NFCSNOOP_MODE_FILTERED);
117             }
118         } catch (RuntimeException e) {
119             Log.e(TAG, "Fail to set nfc system property: " + e.getMessage());
120         }
121 
122     }
123 
124     /**
125      * Called when the NfcRebootDialog cancel is clicked.
126      */
onNfcRebootDialogCanceled()127     public void onNfcRebootDialogCanceled() {
128         mChanged = false;
129     }
130 }
131