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// Author: cirakg & claude ai
// Summary: UTC time for TOTP: the 2038-safe widening of the watch clock, the user's offset, and the trusted clock.
//
// Connect IQ stores time as a 32-bit signed integer, which turns negative on
// 2038-01-19. Reading it as unsigned keeps it correct until 2106 (README 9).
// The trusted clock (Time.CURRENT_TIME_RTC, API 3.0.10) is synced from GPS and
// can't be changed by the user; the UI warns when it is unsynced or differs
// from the normal clock.
import Toybox.Lang;
import Toybox.Time;
module Clock {
const TWO_POW_32 = 4294967296l;
// A 32-bit clock value read as unsigned.
function toUnsigned(value as Number) as Long {
var v = value.toLong();
return v < 0 ? v + TWO_POW_32 : v;
}
// Current unix time (UTC seconds) plus the user's offset for clock skew.
function nowUnix(offsetSeconds as Number) as Long {
if (TestMode.ON) {
return TestMode.NOW + offsetSeconds;
}
return toUnsigned(Time.now().value()) + offsetSeconds;
}
// The trusted clock's unix time, or null when it isn't synced yet.
function trustedUnix() as Long? {
if (TestMode.ON) {
return TestMode.NOW;
}
try {
return toUnsigned(Time.getCurrentTime({:currentTimeType => Time.CURRENT_TIME_RTC}).value());
} catch (e instanceof Time.RealTimeClockNotValidException) {
return null;
}
}
}
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