Fix(booking-job): check before completing probe & reduce thread

backend/internal/ktmtrainbot/backgroundbookingjob.go

@@ -213,7 +213,7 @@ func (env *Env) startBooking(job *Booking, username string, password string, cre
 	contact := job.Contact
 	reverse := job.BackToSg
 
-	threadCount := 15
+	threadCount := 10
 	for i := 0; i < threadCount; i++ {
 		time.Sleep(time.Millisecond * 100)
 		go func() {
@@ -229,6 +229,9 @@ func (env *Env) startBooking(job *Booking, username string, password string, cre
 			currPage = selectBookingSlot(getBookingSlotCtx, currPage, timeCode)
 			log.Println("Booking slot selected.")
 
+			// Make sure page completes loading
+			currPage.MustWaitLoad()
+
 			select {
 			case <-getBookingSlotCtx.Done():
 				return
@@ -430,10 +433,16 @@ func selectBookingSlot(ctx context.Context, page *rod.Page, timeCode string) *ro
 			closeModalButton := page.MustElement("#popupModalCloseButton")
 			closeModalButton.Eval(`this.click()`)
 			time.Sleep(1000 * time.Millisecond)
+		}
+
+		styleAttribute := selectButtonElement.MustAttribute("style")
+		if styleAttribute == nil || !strings.Contains(*styleAttribute, "display: none") {
+			completed = false
 		} else {
 			log.Println("Completed probing")
 			completed = true
 		}
+
 	}
 
 	// Checks for context before clicking