move PermissionsSummaryHelper into SettingsLib to share with car/settings

/*

 * Copyright (C) 2017 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.settingslib.applications;

import android.annotation.NonNull;

import android.content.Context;

import android.content.pm.permission.RuntimePermissionPresentationInfo;

import android.content.pm.permission.RuntimePermissionPresenter;

import java.text.Collator;

import java.util.ArrayList;

import java.util.Collections;

import java.util.List;

public class PermissionsSummaryHelper  {

    public static void getPermissionSummary(Context context, String pkg,

            final PermissionsResultCallback callback) {

        final RuntimePermissionPresenter presenter =

                RuntimePermissionPresenter.getInstance(context);

        presenter.getAppPermissions(pkg, new RuntimePermissionPresenter.OnResultCallback() {

            @Override

            public void onGetAppPermissions(

                    @NonNull List<RuntimePermissionPresentationInfo> permissions) {

                final int permissionCount = permissions.size();

                int grantedStandardCount = 0;

                int grantedAdditionalCount = 0;

                int requestedCount = 0;

                List<CharSequence> grantedStandardLabels = new ArrayList<>();

                for (int i = 0; i < permissionCount; i++) {

                    RuntimePermissionPresentationInfo permission = permissions.get(i);

                    requestedCount++;

                    if (permission.isGranted()) {

                        if (permission.isStandard()) {

                            grantedStandardLabels.add(permission.getLabel());

                            grantedStandardCount++;

                        } else {

                            grantedAdditionalCount++;

                        }

                    }

                }

                Collator collator = Collator.getInstance();

                collator.setStrength(Collator.PRIMARY);

                Collections.sort(grantedStandardLabels, collator);

                callback.onPermissionSummaryResult(grantedStandardCount, requestedCount,

                        grantedAdditionalCount, grantedStandardLabels);

            }

        }, null);

    }

    public static abstract class PermissionsResultCallback {

        public void onAppWithPermissionsCountsResult(int standardGrantedPermissionAppCount,

                int standardUsedPermissionAppCount) {

            /* do nothing - stub */

        }

        public void onPermissionSummaryResult(int standardGrantedPermissionCount,

                int requestedPermissionCount, int additionalGrantedPermissionCount,

                List<CharSequence> grantedGroupLabels) {

            /* do nothing - stub */

        }

    }

}