| /* |
| * 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.dialer.assisteddialing; |
| |
| import android.annotation.TargetApi; |
| import android.os.Build.VERSION_CODES; |
| import android.support.annotation.NonNull; |
| import android.text.TextUtils; |
| import com.android.dialer.common.LogUtil; |
| import com.android.dialer.strictmode.StrictModeUtils; |
| import com.google.i18n.phonenumbers.NumberParseException; |
| import com.google.i18n.phonenumbers.PhoneNumberUtil; |
| import com.google.i18n.phonenumbers.Phonenumber.PhoneNumber; |
| import java.util.Optional; |
| |
| /** Responsible for transforming numbers to make them dialable and valid when roaming. */ |
| final class NumberTransformer { |
| |
| private final PhoneNumberUtil phoneNumberUtil; |
| private final Constraints constraints; |
| |
| public NumberTransformer(Constraints constraints) { |
| this.constraints = constraints; |
| this.phoneNumberUtil = StrictModeUtils.bypass(() -> PhoneNumberUtil.getInstance()); |
| } |
| |
| /** |
| * Returns a boolean for callers to quickly determine whether or not the AssistedDialingMediator |
| * thinks an attempt at assisted dialing is likely to succeed. |
| */ |
| public boolean canDoAssistedDialingTransformation( |
| @NonNull String numberToCheck, |
| @NonNull String userHomeCountryCode, |
| @NonNull String userRoamingCountryCode) { |
| return constraints.meetsPreconditions( |
| numberToCheck, userHomeCountryCode, userRoamingCountryCode); |
| } |
| |
| /** |
| * A method to do assisted dialing transformations. |
| * |
| * <p>The library will do its best to attempt a transformation, but, if for any reason the |
| * transformation fails, we return an empty optional. The operation can be considered a success |
| * when the Optional we return has a value set. |
| */ |
| @SuppressWarnings("AndroidApiChecker") // Use of optional |
| @TargetApi(VERSION_CODES.N) |
| public Optional<TransformationInfo> doAssistedDialingTransformation( |
| String numbertoTransform, String userHomeCountryCode, String userRoamingCountryCode) { |
| |
| if (!constraints.meetsPreconditions( |
| numbertoTransform, userHomeCountryCode, userRoamingCountryCode)) { |
| LogUtil.i( |
| "NumberTransformer.doAssistedDialingTransformation", |
| "assisted dialing failed preconditions"); |
| return Optional.empty(); |
| } |
| |
| PhoneNumber phoneNumber = |
| StrictModeUtils.bypass( |
| () -> { |
| try { |
| return phoneNumberUtil.parse(numbertoTransform, userHomeCountryCode); |
| } catch (NumberParseException e) { |
| LogUtil.i( |
| "NumberTransformer.doAssistedDialingTransformation", "number failed to parse"); |
| return null; |
| } |
| }); |
| |
| if (phoneNumber == null) { |
| return Optional.empty(); |
| } |
| |
| String transformedNumber = |
| StrictModeUtils.bypass( |
| () -> |
| phoneNumberUtil.formatNumberForMobileDialing( |
| phoneNumber, userRoamingCountryCode, true)); |
| |
| // formatNumberForMobileDialing may return an empty String. |
| if (TextUtils.isEmpty(transformedNumber)) { |
| LogUtil.i( |
| "NumberTransformer.doAssistedDialingTransformation", |
| "formatNumberForMobileDialing returned an empty string"); |
| return Optional.empty(); |
| } |
| |
| // TODO Verify the transformed number is still valid? |
| return Optional.of( |
| TransformationInfo.builder() |
| .setOriginalNumber(numbertoTransform) |
| .setTransformedNumber(transformedNumber) |
| .setUserHomeCountryCode(userHomeCountryCode) |
| .setUserRoamingCountryCode(userRoamingCountryCode) |
| .setTransformedNumberCountryCallingCode(phoneNumber.getCountryCode()) |
| .build()); |
| } |
| } |