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Garmin: Add DST/Timezone support

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This commit is contained in:
Daniele Gobbetti 2024-04-19 16:45:58 +02:00
parent 69934b2d7c
commit 2c70f1a616
1 changed files with 18 additions and 12 deletions
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30
app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/garmin/messages/CurrentTimeRequestMessage.java
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@ -1,7 +1,11 @@
package nodomain.freeyourgadget.gadgetbridge.service.devices.garmin.messages;
import java.util.Calendar;
import org.threeten.bp.Instant;
import org.threeten.bp.ZoneId;
import org.threeten.bp.zone.ZoneOffsetTransition;
import org.threeten.bp.zone.ZoneRules;
import java.util.TimeZone;
import nodomain.freeyourgadget.gadgetbridge.service.devices.garmin.GarminTimeUtils;
@ -23,13 +27,17 @@ public class CurrentTimeRequestMessage extends GFDIMessage {
@Override
protected boolean generateOutgoing() {
long now = System.currentTimeMillis();
final TimeZone timeZone = TimeZone.getDefault();
final Calendar calendar = Calendar.getInstance(timeZone);
calendar.setTimeInMillis(now);
int dstOffset = calendar.get(Calendar.DST_OFFSET) / 1000;
int timeZoneOffset = timeZone.getOffset(now) / 1000;
int garminTimestamp = GarminTimeUtils.javaMillisToGarminTimestamp(now);
final Instant now = Instant.now();
final ZoneRules zoneRules = ZoneId.systemDefault().getRules();
final int dstOffset = (int) zoneRules.getDaylightSavings(now).getSeconds();
final int timeZoneOffset = TimeZone.getDefault().getOffset(now.toEpochMilli()) / 1000;
final int garminTimestamp = GarminTimeUtils.unixTimeToGarminTimestamp((int) now.getEpochSecond());
final ZoneOffsetTransition nextTransitionStart = zoneRules.nextTransition(now);
final int nextTransitionStartsTs = (int) nextTransitionStart.toEpochSecond();
final int nextTransitionEndsTs = (int) zoneRules.nextTransition(nextTransitionStart.getInstant()).toEpochSecond();
LOG.info("Processing current time request #{}: time={}, DST={}, ofs={}", referenceID, garminTimestamp, dstOffset, timeZoneOffset);
@ -41,10 +49,8 @@ public class CurrentTimeRequestMessage extends GFDIMessage {
writer.writeInt(referenceID);
writer.writeInt(garminTimestamp);
writer.writeInt(timeZoneOffset);
// TODO: next DST start/end
writer.writeInt(0);
writer.writeInt(0);
writer.writeInt(GarminTimeUtils.unixTimeToGarminTimestamp(nextTransitionEndsTs));
writer.writeInt(GarminTimeUtils.unixTimeToGarminTimestamp(nextTransitionStartsTs));
return true;
}
}