add timer and interval modules

interval.go

@@ -0,0 +1,70 @@
+package showbridge
+
+import (
+	"context"
+	"fmt"
+	"log/slog"
+	"time"
+)
+
+type Interval struct {
+	config   ModuleConfig
+	Duration uint32
+	router   *Router
+}
+
+func init() {
+	RegisterModule(ModuleRegistration{
+		Type: "gen.interval",
+		New: func(config ModuleConfig) (Module, error) {
+			params := config.Params
+
+			duration, ok := params["duration"]
+			if !ok {
+				return nil, fmt.Errorf("interval requires a duration parameter")
+			}
+
+			durationNum, ok := duration.(float64)
+
+			if !ok {
+				return nil, fmt.Errorf("interval duration must be number")
+			}
+
+			return &Interval{Duration: uint32(durationNum), config: config}, nil
+		},
+	})
+}
+
+func (i *Interval) Id() string {
+	return i.config.Id
+}
+
+func (i *Interval) Type() string {
+	return i.config.Type
+}
+
+func (i *Interval) RegisterRouter(router *Router) {
+	slog.Debug("registering router", "id", i.config.Id)
+	i.router = router
+}
+
+func (i *Interval) Run(ctx context.Context) error {
+	ticker := time.NewTicker(time.Millisecond * time.Duration(i.Duration))
+	defer ticker.Stop()
+	for {
+		select {
+		case <-ctx.Done():
+			ticker.Stop()
+			return nil
+		case t := <-ticker.C:
+			if i.router != nil {
+				i.router.HandleInput(i.config.Id, t)
+			}
+		}
+	}
+
+}
+
+func (i *Interval) Output(payload any) error {
+	return fmt.Errorf("interval output is not implemented")
+}