feat: run scheduler event in given interval

scheduler.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"context"
 	"database/sql"
 	"log"
 	"time"
@@ -38,30 +39,46 @@ func (s Scheduler) AddListener(event string, listenFunc ListenFunc) {
 	s.listeners[event] = listenFunc
 }
 
-// CallListeners calls the event listener of provided event
-func (s Scheduler) CallListeners(event Event) {
+// callListeners calls the event listener of provided event
+func (s Scheduler) callListeners(event Event) {
 	eventFn, ok := s.listeners[event.Name]
 	if ok {
 		go eventFn(event.Payload)
-		s.ClearEvent(event)
+		_, err := s.db.Exec(`DELETE FROM "public"."jobs" WHERE "id" = $1`, event.ID)
+		if err != nil {
+			log.Print("💀 error: ", err)
+		}
 	} else {
 		log.Print("💀 error: couldn't find event listeners attached to ", event.Name)
 	}
 
 }
 
-// ClearEvent clears job from database
-func (s Scheduler) ClearEvent(event Event) {
-	_, err := s.db.Exec(`DELETE FROM "public"."jobs" WHERE "id" = $1`, event.ID)
-	if err != nil {
-		log.Print("💀 error: ", err)
-	}
+// CheckEventsInInterval checks the event in given interval
+func (s Scheduler) CheckEventsInInterval(ctx context.Context, duration time.Duration) {
+	ticker := time.NewTicker(duration)
+	go func() {
+		for {
+			select {
+			case <-ctx.Done():
+				ticker.Stop()
+				return
+			case <-ticker.C:
+				log.Println("⏰ Ticks Received...")
+				events := s.checkDueEvents()
+				for _, e := range events {
+					s.callListeners(e)
+				}
+			}
+
+		}
+	}()
 }
 
-// CheckDueEvents checks and returns due events
-func (s Scheduler) CheckDueEvents() []Event {
+// checkDueEvents checks and returns due events
+func (s Scheduler) checkDueEvents() []Event {
 	events := []Event{}
-	rows, err := s.db.Query(`SELECT id, name, payload FROM jobs WHERE runAt < $1`, time.Now())
+	rows, err := s.db.Query(`SELECT "id", "name", "payload" FROM "public"."jobs" WHERE "runAt" < $1`, time.Now())
 	if err != nil {
 		log.Print("💀 error: ", err)
 		return nil