calculateRetentionHour static method
Calculates retention hours between install time (milliseconds) and nowUtcMillis.
Implementation
static int calculateRetentionHour(int installTimeMillis, int nowUtcMillis) {
if (installTimeMillis == -1) return -1;
try {
final diffMillis = nowUtcMillis - installTimeMillis;
final diffHours = diffMillis ~/ (1000 * 60 * 60);
return diffHours;
} catch (_) {
return -1;
}
}