Add waiting for next period

emgauwa-lib/src/db/schedules.rs

@@ -198,4 +198,12 @@ impl DbSchedule {
 	pub fn is_on(&self, now: &NaiveTime) -> bool {
 		self.periods.0.iter().any(|period| period.is_on(now))
 	}
+
+	pub fn get_next_time(&self, now: &NaiveTime) -> Option<NaiveTime> {
+		self.periods
+			.0
+			.iter()
+			.filter_map(|period| period.get_next_time(now))
+			.min()
+	}
 }