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.network;
18 
19 import android.app.Activity;
20 import android.os.UserHandle;
21 import android.os.UserManager;
22 import android.view.LayoutInflater;
23 import android.view.View;
24 import android.view.ViewStub;
25 
26 import androidx.annotation.VisibleForTesting;
27 import androidx.appcompat.app.AlertDialog;
28 
29 import com.android.settings.R;
30 import com.android.settings.enterprise.ActionDisabledByAdminDialogHelper;
31 import com.android.settingslib.RestrictedLockUtilsInternal;
32 import com.android.settingslib.RestrictedLockUtils.EnforcedAdmin;
33 
34 /**
35  * A builder for creating restriction View when constructing UI for resetting network
36  * configuration.
37  */
38 public class ResetNetworkRestrictionViewBuilder extends NetworkResetRestrictionChecker {
39 
40     @VisibleForTesting
41     static final String mRestriction = UserManager.DISALLOW_NETWORK_RESET;
42 
43     protected Activity mActivity;
44     protected LayoutInflater mInflater;
45 
46     /**
47      * Constructor of builder.
48      *
49      * @param activity Activity to present restriction View.
50      */
ResetNetworkRestrictionViewBuilder(Activity activity)51     public ResetNetworkRestrictionViewBuilder(Activity activity) {
52         super(activity);
53         mActivity = activity;
54     }
55 
56     /**
57      * Option for configuring LayoutInflater.
58      *
59      * @param inflater LayoutInflater
60      * @return this builder
61      */
setLayoutInflater(LayoutInflater inflater)62     public ResetNetworkRestrictionViewBuilder setLayoutInflater(LayoutInflater inflater) {
63         mInflater = inflater;
64         return this;
65     }
66 
67     /**
68      * Try to provide a View if access to reset network is not allowed.
69      * @return a View which presenting information of restrictions.
70      *         {@code null} when no restriction on accessing.
71      */
build()72     public View build() {
73         if (hasUserRestriction()) {
74             return operationNotAllow();
75         }
76 
77         // Not allow when this option is restricted.
78         EnforcedAdmin admin = getEnforceAdminByRestriction();
79         if (admin == null) {
80             return null;
81         }
82 
83         createRestrictDialogBuilder(admin)
84                 .setOnDismissListener(dialogInterface -> mActivity.finish())
85                 .show();
86         return createEmptyView();
87     }
88 
89     @VisibleForTesting
getLayoutInflater()90     protected LayoutInflater getLayoutInflater() {
91         if (mInflater != null) {
92             return mInflater;
93         }
94         return mActivity.getLayoutInflater();
95     }
96 
97     @VisibleForTesting
operationNotAllow()98     protected View operationNotAllow() {
99         return getLayoutInflater().inflate(R.layout.network_reset_disallowed_screen, null);
100     }
101 
102     @VisibleForTesting
getEnforceAdminByRestriction()103     protected EnforcedAdmin getEnforceAdminByRestriction() {
104         return RestrictedLockUtilsInternal.checkIfRestrictionEnforced(
105                 mActivity, mRestriction, UserHandle.myUserId());
106     }
107 
108     @VisibleForTesting
createRestrictDialogBuilder(EnforcedAdmin admin)109     protected AlertDialog.Builder createRestrictDialogBuilder(EnforcedAdmin admin) {
110         return (new ActionDisabledByAdminDialogHelper(mActivity))
111                 .prepareDialogBuilder(mRestriction, admin);
112     }
113 
114     @VisibleForTesting
createEmptyView()115     protected View createEmptyView() {
116         return new ViewStub(mActivity);
117     }
118 }
119