Call monitor via callback in server

server/server.go

@@ -7,15 +7,18 @@ import (
 	"path"
 	"strings"
 	"syscall"
+	"time"
 )
 
 type Server struct {
-	addr string
+	addr           string
+	newItemHandler func(string, time.Duration)
 }
 
-func New(addr string) (*Server, error) {
+func New(addr string, newItemHandler func(string, time.Duration)) (*Server, error) {
 	return &Server{
-		addr: addr,
+		addr:           addr,
+		newItemHandler: newItemHandler,
 	}, nil
 }