new event system (again)

event/stdin.go

@@ -2,7 +2,6 @@ package event
 
 import (
 	"bufio"
-	"context"
 	"os"
 )
 
@@ -10,36 +9,26 @@ type Stdin struct {
 	Val string
 }
 
-type StdinHandler struct {
-	*Loop
-	stdInChan chan Stdin
-	Ctx       context.Context
-}
-
-func (s *StdinHandler) OnTick(_ Tick) (err error) {
-	select {
-	case stdin := <-s.stdInChan:
-		err = s.Fire(Stdin{stdin.Val})
-	default:
-
-	}
-	return
-}
-
-func (s *StdinHandler) ScanJob() {
-	scanner := bufio.NewScanner(os.Stdin)
-	for scanner.Scan() {
-		select {
-		case <-s.Ctx.Done():
-			return
-		default:
-			s.stdInChan <- Stdin{scanner.Text()}
-		}
-	}
-}
-func (s *StdinHandler) OnStart() (err error) {
-	s.RegisterCritical(s.OnTick)
-	s.stdInChan = make(chan Stdin)
-	go s.ScanJob()
+func StartListingStdin(l *Loop) {
+	l.RegisterEventSource(func() (chSending <-chan any) {
+		ch := make(chan any)
+		go func() {
+			scanner := bufio.NewScanner(os.Stdin)
+			ctx := l.Ctx
+			for scanner.Scan() {
+				select {
+				case <-ctx.Done():
+					return
+				default:
+					ch <- Stdin{scanner.Text()}
+				}
+			}
+			if err := scanner.Err(); err != nil {
+				ch <- err
+			}
+		}()
+		chSending = ch
+		return
+	}())
 	return
 }