[Settings] Code Refactor

Adjust code structure for maintainance.

Bug: 259611847
Test: auto test
Change-Id: I6710aa814441c0858c712f416ffddde44081d4d1

src/com/android/settings/network/ResetNetworkRestrictionViewBuilder.java

@@ -0,0 +1,118 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.network;
+
+import android.app.Activity;
+import android.os.UserHandle;
+import android.os.UserManager;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewStub;
+
+import androidx.annotation.VisibleForTesting;
+import androidx.appcompat.app.AlertDialog;
+
+import com.android.settings.R;
+import com.android.settings.enterprise.ActionDisabledByAdminDialogHelper;
+import com.android.settingslib.RestrictedLockUtilsInternal;
+import com.android.settingslib.RestrictedLockUtils.EnforcedAdmin;
+
+/**
+ * A builder for creating restriction View when constructing UI for resetting network
+ * configuration.
+ */
+public class ResetNetworkRestrictionViewBuilder extends NetworkResetRestrictionChecker {
+
+    @VisibleForTesting
+    static final String mRestriction = UserManager.DISALLOW_NETWORK_RESET;
+
+    protected Activity mActivity;
+    protected LayoutInflater mInflater;
+
+    /**
+     * Constructor of builder.
+     *
+     * @param activity Activity to present restriction View.
+     */
+    public ResetNetworkRestrictionViewBuilder(Activity activity) {
+        super(activity);
+        mActivity = activity;
+    }
+
+    /**
+     * Option for configuring LayoutInflater.
+     *
+     * @param inflater LayoutInflater
+     * @return this builder
+     */
+    public ResetNetworkRestrictionViewBuilder setLayoutInflater(LayoutInflater inflater) {
+        mInflater = inflater;
+        return this;
+    }
+
+    /**
+     * Try to provide a View if access to reset network is not allowed.
+     * @return a View which presenting information of restrictions.
+     *         {@code null} when no restriction on accessing.
+     */
+    public View build() {
+        if (hasUserRestriction()) {
+            return operationNotAllow();
+        }
+
+        // Not allow when this option is restricted.
+        EnforcedAdmin admin = getEnforceAdminByRestriction();
+        if (admin == null) {
+            return null;
+        }
+
+        createRestrictDialogBuilder(admin)
+                .setOnDismissListener(dialogInterface -> mActivity.finish())
+                .show();
+        return createEmptyView();
+    }
+
+    @VisibleForTesting
+    protected LayoutInflater getLayoutInflater() {
+        if (mInflater != null) {
+            return mInflater;
+        }
+        return mActivity.getLayoutInflater();
+    }
+
+    @VisibleForTesting
+    protected View operationNotAllow() {
+        return getLayoutInflater().inflate(R.layout.network_reset_disallowed_screen, null);
+    }
+
+    @VisibleForTesting
+    protected EnforcedAdmin getEnforceAdminByRestriction() {
+        return RestrictedLockUtilsInternal.checkIfRestrictionEnforced(
+                mActivity, mRestriction, UserHandle.myUserId());
+    }
+
+    @VisibleForTesting
+    protected AlertDialog.Builder createRestrictDialogBuilder(EnforcedAdmin admin) {
+        return (new ActionDisabledByAdminDialogHelper(mActivity))
+                .prepareDialogBuilder(mRestriction, admin);
+    }
+
+    @VisibleForTesting
+    protected View createEmptyView() {
+        return new ViewStub(mActivity);
+    }
+}