src/com/android/packageinstaller/role/model/SmsRoleBehavior.java

/*
 * Copyright (C) 2018 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.packageinstaller.role.model;

import android.content.Context;
import android.os.Process;
import android.os.UserHandle;
import android.os.UserManager;
import android.telephony.TelephonyManager;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;

import com.android.packageinstaller.permission.utils.CollectionUtils;
import com.android.packageinstaller.role.utils.UserUtils;
import com.android.permissioncontroller.R;

import java.util.List;

/**
 * Class for behavior of the SMS role.
 *
 * @see com.android.settings.applications.DefaultAppSettings
 * @see com.android.settings.applications.defaultapps.DefaultSmsPreferenceController
 * @see com.android.settings.applications.defaultapps.DefaultSmsPicker
 */
public class SmsRoleBehavior implements RoleBehavior {

    @Override
    public boolean isAvailableAsUser(@NonNull Role role, @NonNull UserHandle user,
            @NonNull Context context) {
        if (UserUtils.isWorkProfile(user, context)) {
            return false;
        }
        UserManager userManager = context.getSystemService(UserManager.class);
        if (userManager.isRestrictedProfile(user)) {
            return false;
        }
        TelephonyManager telephonyManager = context.getSystemService(TelephonyManager.class);
        if (!telephonyManager.isSmsCapable()
                // Ensure sms role is present on car despite !isSmsCapable config (b/132972702)
                && getDefaultHolder(role, context) == null) {
            return false;
        }
        return true;
    }

    @Nullable
    @Override
    public String getFallbackHolder(@NonNull Role role, @NonNull Context context) {
        String defaultPackageName = getDefaultHolder(role, context);
        if (defaultPackageName != null) {
            return defaultPackageName;
        }

        // TODO(b/132916161): This was the previous behavior, however this may allow any third-party
        //  app to suddenly become the default SMS app and get the permissions, if no system default
        //  SMS app is available.
        List<String> qualifyingPackageNames = role.getQualifyingPackagesAsUser(
                Process.myUserHandle(), context);
        return CollectionUtils.firstOrNull(qualifyingPackageNames);
    }

    @Nullable
    private static String getDefaultHolder(@NonNull Role role, @NonNull Context context) {
        return ExclusiveDefaultHolderMixin.getDefaultHolder(role, "config_defaultSms", context);
    }

    @Nullable
    @Override
    public CharSequence getConfirmationMessage(@NonNull Role role, @NonNull String packageName,
            @NonNull Context context) {
        return EncryptionUnawareConfirmationMixin.getConfirmationMessage(role, packageName,
                context);
    }

    @Override
    public boolean isVisibleAsUser(@NonNull Role role, @NonNull UserHandle user,
            @NonNull Context context) {
        return context.getResources().getBoolean(R.bool.config_showSmsRole);
    }
}