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Improve SchedulingUtil.getZoneId for PhoneNumberType.UNKONWN numbers

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This commit is contained in:
Chris Eager
2026-02-05 13:41:00 -06:00
committed by Chris Eager
parent 5ec8628b51
commit c13a34b2c8
2 changed files with 38 additions and 17 deletions
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26
service/src/main/java/org/whispersystems/textsecuregcm/scheduler/SchedulingUtil.java
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@@ -44,7 +44,7 @@ public class SchedulingUtil {
final LocalTime preferredTime,
final Clock clock) {
final ZonedDateTime candidateNotificationTime = getZoneId(account, clock)
final ZonedDateTime candidateNotificationTime = getZoneId(account.getNumber(), clock)
.map(zoneId -> {
Metrics.counter(PARSED_TIMEZONE_COUNTER_NAME, HAS_TIMEZONE_TAG_NAME, String.valueOf(true)).increment();
return ZonedDateTime.now(clock.withZone(zoneId)).with(preferredTime);
@@ -64,15 +64,23 @@ public class SchedulingUtil {
}
@VisibleForTesting
static Optional<ZoneId> getZoneId(final Account account, final Clock clock) {
public static Optional<ZoneId> getZoneId(final String e164, final Clock clock) {
try {
final Phonenumber.PhoneNumber phoneNumber = PhoneNumberUtil.getInstance().parse(account.getNumber(), null);
final Phonenumber.PhoneNumber phoneNumber = PhoneNumberUtil.getInstance().parse(e164, null);
final List<String> timeZonesForNumber =
List<String> timeZonesForNumber =
PhoneNumberToTimeZonesMapper.getInstance().getTimeZonesForNumber(phoneNumber);
if (timeZonesForNumber.equals(List.of(PhoneNumberToTimeZonesMapper.getUnknownTimeZone()))) {
return Optional.empty();
if (isUnknownTimeZone(timeZonesForNumber)) {
// The more general getTimeZonesForNumber has a guard on PhoneNumberType.UNKONWN, returning the “unknown”
// time zone for these numbers. In these cases, we'll first fall back to the geographical lookup, which looks up
// a result based on the country code and national significant number.
timeZonesForNumber =
PhoneNumberToTimeZonesMapper.getInstance().getTimeZonesForGeographicalNumber(phoneNumber);
if (isUnknownTimeZone(timeZonesForNumber)) {
return Optional.empty();
}
}
final Instant now = clock.instant();
@@ -91,7 +99,7 @@ public class SchedulingUtil {
.collect(Collectors.toMap(
ZoneId::getRules,
Function.identity(),
(v1, v2) -> v2));
(_, v2) -> v2));
// Sort the ZoneRules by the offsets they produce
final List<ZoneRules> zoneRulesSortedByOffset = byOffset.keySet()
@@ -105,4 +113,8 @@ public class SchedulingUtil {
return Optional.empty();
}
}
static boolean isUnknownTimeZone(final List<String> timeZonesForNumber) {
return timeZonesForNumber.equals(List.of(PhoneNumberToTimeZonesMapper.getUnknownTimeZone()));
}
}