add quiet hours to silence alerts during specific time periods (#265)

internal/records/records.go

@@ -498,6 +498,10 @@ func (rm *RecordManager) DeleteOldRecords() {
 		if err != nil {
 			return err
 		}
+		err = deleteOldQuietHours(txApp)
+		if err != nil {
+			return err
+		}
 		return nil
 	})
 }
@@ -591,6 +595,17 @@ func deleteOldContainerRecords(app core.App) error {
 	return nil
 }
 
+// Deletes old quiet hours records where end date has passed
+func deleteOldQuietHours(app core.App) error {
+	now := time.Now().UTC()
+	_, err := app.DB().NewQuery("DELETE FROM quiet_hours WHERE type = 'one-time' AND end < {:now}").Bind(dbx.Params{"now": now}).Execute()
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
 /* Round float to two decimals */
 func twoDecimals(value float64) float64 {
 	return math.Round(value*100) / 100