diff options
Diffstat (limited to 'java/com/android/dialer/assisteddialing')
5 files changed, 507 insertions, 0 deletions
diff --git a/java/com/android/dialer/assisteddialing/AssistedDialingMediator.java b/java/com/android/dialer/assisteddialing/AssistedDialingMediator.java new file mode 100644 index 000000000..2613d07a9 --- /dev/null +++ b/java/com/android/dialer/assisteddialing/AssistedDialingMediator.java @@ -0,0 +1,81 @@ +/* + * 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 com.android.dialer.common.LogUtil; +import java.util.Optional; + +/** + * The Mediator for Assisted Dialing. + * + * <p>This class is responsible for mediating location discovery of the user, determining if the + * call is eligible for assisted dialing, and performing the transformation of numbers eligible for + * assisted dialing. + */ +public final class AssistedDialingMediator { + + private final LocationDetector locationDetector; + private final NumberTransformer numberTransformer; + + protected AssistedDialingMediator( + @NonNull LocationDetector locationDetector, @NonNull NumberTransformer numberTransformer) { + if (locationDetector == null) { + throw new NullPointerException("locationDetector was null"); + } + + if (numberTransformer == null) { + throw new NullPointerException("numberTransformer was null"); + } + this.locationDetector = locationDetector; + this.numberTransformer = numberTransformer; + } + + /** + * 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 conditionsEligibleForAssistedDialing( + @NonNull String numberToCheck, + @NonNull String userHomeCountryCode, + @NonNull String userRoamingCountryCode) { + return numberTransformer.canDoAssistedDialingTransformation( + numberToCheck, userHomeCountryCode, userRoamingCountryCode); + } + + /** + * Returns an Optional of type String containing the transformed number that was provided. The + * transformed number should be capable of dialing out of the User's current country and + * successfully connecting with a contact in the User's home country. + */ + @SuppressWarnings("AndroidApiChecker") // Use of optional + @TargetApi(VERSION_CODES.N) + public Optional<String> attemptAssistedDial(@NonNull String numberToTransform) { + Optional<String> userHomeCountryCode = locationDetector.getUpperCaseUserHomeCountry(); + Optional<String> userRoamingCountryCode = locationDetector.getUpperCaseUserRoamingCountry(); + + if (!userHomeCountryCode.isPresent() || !userRoamingCountryCode.isPresent()) { + LogUtil.i("AssistedDialingMediator.attemptAssistedDial", "Unable to determine country codes"); + return Optional.empty(); + } + + return numberTransformer.doAssistedDialingTransformation( + numberToTransform, userHomeCountryCode.get(), userRoamingCountryCode.get()); + } +} diff --git a/java/com/android/dialer/assisteddialing/ConcreteCreator.java b/java/com/android/dialer/assisteddialing/ConcreteCreator.java new file mode 100644 index 000000000..f51216a69 --- /dev/null +++ b/java/com/android/dialer/assisteddialing/ConcreteCreator.java @@ -0,0 +1,58 @@ +/* + * 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.content.Context; +import android.os.Build.VERSION_CODES; +import android.support.annotation.NonNull; +import android.telephony.TelephonyManager; +import com.android.dialer.common.LogUtil; + +/** + * A Creator for AssistedDialingMediators. + * + * <p>This helps keep the dependencies required by AssistedDialingMediator for assisted dialing + * explicit. + */ +@TargetApi(VERSION_CODES.N) +public final class ConcreteCreator { + + /** + * Creates a new AssistedDialingMediator + * + * @param telephonyManager The telephony manager used to determine user location. + * @param context The context used to determine whether or not a provided number is an emergency + * number. + * @return An AssistedDialingMediator + */ + public static AssistedDialingMediator createNewAssistedDialingMediator( + @NonNull TelephonyManager telephonyManager, @NonNull Context context) { + if (telephonyManager == null) { + LogUtil.i( + "ConcreteCreator.createNewAssistedDialingMediator", "provided TelephonyManager was null"); + throw new NullPointerException("Provided TelephonyManager was null"); + } + if (context == null) { + LogUtil.i("ConcreteCreator.createNewAssistedDialingMediator", "provided context was null"); + throw new NullPointerException("Provided context was null"); + } + Constraints constraints = new Constraints(context); + return new AssistedDialingMediator( + new LocationDetector(telephonyManager), new NumberTransformer(constraints)); + } +} diff --git a/java/com/android/dialer/assisteddialing/Constraints.java b/java/com/android/dialer/assisteddialing/Constraints.java new file mode 100644 index 000000000..6bcab9963 --- /dev/null +++ b/java/com/android/dialer/assisteddialing/Constraints.java @@ -0,0 +1,202 @@ +/* + * 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.content.Context; +import android.os.Build.VERSION_CODES; +import android.support.annotation.NonNull; +import android.telephony.PhoneNumberUtils; +import android.text.TextUtils; +import android.util.ArraySet; +import com.android.dialer.common.LogUtil; +import com.google.i18n.phonenumbers.NumberParseException; +import com.google.i18n.phonenumbers.PhoneNumberUtil; +import com.google.i18n.phonenumbers.Phonenumber.PhoneNumber; +import com.google.i18n.phonenumbers.Phonenumber.PhoneNumber.CountryCodeSource; +import java.util.Arrays; +import java.util.Locale; +import java.util.Optional; +import java.util.Set; +import java.util.stream.Collectors; + +/** Ensures that a number is eligible for Assisted Dialing */ +@TargetApi(VERSION_CODES.N) +@SuppressWarnings("AndroidApiChecker") // Use of optional +final class Constraints { + private final PhoneNumberUtil phoneNumberUtil = PhoneNumberUtil.getInstance(); + private final Context context; + + /** + * Create a new instance of Constraints. + * + * @param context The context used to determine whether or not a number is an emergency number. + */ + public Constraints(@NonNull Context context) { + if (context == null) { + throw new NullPointerException("Provided context cannot be null"); + } + this.context = context; + } + + // TODO(erfanian): Ensure the below standard is consistent between libphonenumber and the + // platform. + // ISO 3166-1 alpha-2 Country Codes that are eligible for assisted dialing. + private final String[] supportedCountryCodeValues = + new String[] { + "CA" /* Canada */, + "GB" /* United Kingdom */, + "JP" /* Japan */, + "MX" /* Mexico */, + "US" /* United States*/, + }; + + private final Set<String> supportedCountryCodes = + Arrays.stream(supportedCountryCodeValues) + .map(v -> v.toUpperCase(Locale.US)) + .collect(Collectors.toCollection(ArraySet::new)); + + /** + * Determines whether or not we think Assisted Dialing is possible given the provided parameters. + * + * @param numberToCheck A string containing the phone number. + * @param userHomeCountryCode A string containing an ISO 3166-1 alpha-2 country code representing + * the user's home country. + * @param userRoamingCountryCode A string containing an ISO 3166-1 alpha-2 country code + * representing the user's roaming country. + * @return A boolean indicating whether or not the provided values are eligible for assisted + * dialing. + */ + public boolean meetsPreconditions( + @NonNull String numberToCheck, + @NonNull String userHomeCountryCode, + @NonNull String userRoamingCountryCode) { + + if (TextUtils.isEmpty(numberToCheck)) { + LogUtil.i("Constraints.meetsPreconditions", "numberToCheck was empty"); + return false; + } + + if (TextUtils.isEmpty(userHomeCountryCode)) { + LogUtil.i("Constraints.meetsPreconditions", "userHomeCountryCode was empty"); + return false; + } + + if (TextUtils.isEmpty(userRoamingCountryCode)) { + LogUtil.i("Constraints.meetsPreconditions", "userRoamingCountryCode was empty"); + return false; + } + + userHomeCountryCode = userHomeCountryCode.toUpperCase(Locale.US); + userRoamingCountryCode = userRoamingCountryCode.toUpperCase(Locale.US); + + Optional<PhoneNumber> parsedPhoneNumber = parsePhoneNumber(numberToCheck, userHomeCountryCode); + + if (!parsedPhoneNumber.isPresent()) { + LogUtil.i("Constraints.meetsPreconditions", "parsedPhoneNumber was empty"); + return false; + } + + return areSupportedCountryCodes(userHomeCountryCode, userRoamingCountryCode) + && isUserRoaming(userHomeCountryCode, userRoamingCountryCode) + && isNotInternationalNumber(parsedPhoneNumber) + && isNotEmergencyNumber(numberToCheck, context) + && isValidNumber(parsedPhoneNumber); + } + + /** Returns a boolean indicating the value equivalence of the provided country codes. */ + private boolean isUserRoaming( + @NonNull String userHomeCountryCode, @NonNull String userRoamingCountryCode) { + boolean result = !userHomeCountryCode.equals(userRoamingCountryCode); + LogUtil.i("Constraints.isUserRoaming", String.valueOf(result)); + return result; + } + + /** + * Returns a boolean indicating the support of both provided country codes for assisted dialing. + * Both country codes must be allowed for the return value to be true. + */ + private boolean areSupportedCountryCodes( + @NonNull String userHomeCountryCode, @NonNull String userRoamingCountryCode) { + if (TextUtils.isEmpty(userHomeCountryCode)) { + LogUtil.i("Constraints.areSupportedCountryCodes", "userHomeCountryCode was empty"); + return false; + } + + if (TextUtils.isEmpty(userRoamingCountryCode)) { + LogUtil.i("Constraints.areSupportedCountryCodes", "userRoamingCountryCode was empty"); + return false; + } + + boolean result = + supportedCountryCodes.contains(userHomeCountryCode) + && supportedCountryCodes.contains(userRoamingCountryCode); + LogUtil.i("Constraints.areSupportedCountryCodes", String.valueOf(result)); + return result; + } + + /** + * A convenience method to take a number as a String and a specified country code, and return a + * PhoneNumber object. + */ + private Optional<PhoneNumber> parsePhoneNumber( + @NonNull String numberToParse, @NonNull String userHomeCountryCode) { + try { + // TODO(erfanian): confirm behavior of blocking the foreground thread when moving to the + // framework + return Optional.of(phoneNumberUtil.parseAndKeepRawInput(numberToParse, userHomeCountryCode)); + } catch (NumberParseException e) { + LogUtil.i("Constraints.parsePhoneNumber", "could not parse the number"); + return Optional.empty(); + } + } + + /** + * Returns a boolean indicating if the provided number and home country code are already + * internationally formatted. + */ + private boolean isNotInternationalNumber(@NonNull Optional<PhoneNumber> parsedPhoneNumber) { + + if (parsedPhoneNumber.get().hasCountryCode() + && parsedPhoneNumber.get().getCountryCodeSource() + != CountryCodeSource.FROM_DEFAULT_COUNTRY) { + LogUtil.i( + "Constraints.isNotInternationalNumber", "phone number already provided the country code"); + return false; + } + return true; + } + + /** Returns a boolean indicating if the provided number is considered to be a valid number. */ + private boolean isValidNumber(@NonNull Optional<PhoneNumber> parsedPhoneNumber) { + boolean result = PhoneNumberUtil.getInstance().isValidNumber(parsedPhoneNumber.get()); + LogUtil.i("Constraints.isValidNumber", String.valueOf(result)); + + return result; + } + + /** Returns a boolean indicating if the provided number is an emergency number. */ + private boolean isNotEmergencyNumber(@NonNull String numberToCheck, @NonNull Context context) { + // isEmergencyNumber may depend on network state, so also use isLocalEmergencyNumber when + // roaming and out of service. + boolean result = + !PhoneNumberUtils.isEmergencyNumber(numberToCheck) + && !PhoneNumberUtils.isLocalEmergencyNumber(context, numberToCheck); + LogUtil.i("Constraints.isNotEmergencyNumber", String.valueOf(result)); + return result; + } +} diff --git a/java/com/android/dialer/assisteddialing/LocationDetector.java b/java/com/android/dialer/assisteddialing/LocationDetector.java new file mode 100644 index 000000000..684068912 --- /dev/null +++ b/java/com/android/dialer/assisteddialing/LocationDetector.java @@ -0,0 +1,73 @@ +/* + * 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.telephony.TelephonyManager; +import com.android.dialer.common.LogUtil; +import java.util.Locale; +import java.util.Optional; + +// TODO(erfanian): Improve definition of roaming and home country in finalized API. +/** + * LocationDetector is responsible for determining the Roaming location of the User, in addition to + * User's home country. + */ +final class LocationDetector { + + private final TelephonyManager telephonyManager; + + public LocationDetector(@NonNull TelephonyManager telephonyManager) { + if (telephonyManager == null) { + throw new NullPointerException("Provided TelephonyManager was null"); + } + this.telephonyManager = telephonyManager; + } + + // TODO(erfanian): confirm this is based on ISO 3166-1 alpha-2. libphonenumber expects Unicode's + // CLDR + // TODO(erfanian): confirm these are still valid in a multi-sim environment. + /** + * Returns what we believe to be the User's home country. This should resolve to + * PROPERTY_ICC_OPERATOR_ISO_COUNTRY + */ + @SuppressWarnings("AndroidApiChecker") // Use of optional + @TargetApi(VERSION_CODES.N) + public Optional<String> getUpperCaseUserHomeCountry() { + String simCountryIso = telephonyManager.getSimCountryIso(); + if (simCountryIso != null) { + return Optional.of(telephonyManager.getSimCountryIso().toUpperCase(Locale.US)); + } + LogUtil.i("LocationDetector.getUpperCaseUserHomeCountry", "user home country was null"); + return Optional.empty(); + } + + /** Returns what we believe to be the User's current (roaming) country */ + @SuppressWarnings("AndroidApiChecker") // Use of optional + @TargetApi(VERSION_CODES.N) + public Optional<String> getUpperCaseUserRoamingCountry() { + // TODO Increase coverage of location resolution?? + String networkCountryIso = telephonyManager.getNetworkCountryIso(); + if (networkCountryIso != null) { + return Optional.of(telephonyManager.getNetworkCountryIso().toUpperCase(Locale.US)); + } + LogUtil.i("LocationDetector.getUpperCaseUserRoamingCountry", "user roaming country was null"); + return Optional.empty(); + } +} diff --git a/java/com/android/dialer/assisteddialing/NumberTransformer.java b/java/com/android/dialer/assisteddialing/NumberTransformer.java new file mode 100644 index 000000000..f01d1a08f --- /dev/null +++ b/java/com/android/dialer/assisteddialing/NumberTransformer.java @@ -0,0 +1,93 @@ +/* + * 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.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 = PhoneNumberUtil.getInstance(); + private final Constraints constraints; + + public NumberTransformer(Constraints constraints) { + this.constraints = constraints; + } + + /** + * 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<String> 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; + try { + phoneNumber = phoneNumberUtil.parse(numbertoTransform, userHomeCountryCode); + } catch (NumberParseException e) { + LogUtil.i("NumberTransformer.doAssistedDialingTransformation", "number failed to parse"); + return Optional.empty(); + } + + String transformedNumber = + 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(transformedNumber); + } +} |