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/*
* 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.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;
NumberTransformer(Constraints constraints) {
this.constraints = constraints;
this.phoneNumberUtil = StrictModeUtils.bypass(PhoneNumberUtil::getInstance);
}
/**
* 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.
*/
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());
}
}
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