From 7da7638ecd378d935f3d8c3dc2bd94fddc3b2a7e Mon Sep 17 00:00:00 2001
From: mamor87 <markusgilg87@gmail.com>
Date: Wed, 17 Sep 2025 07:55:38 +0200
Subject: [PATCH] add helper to read data

---
 README.md            | 8 +++-----
 helper.go            | 7 +++++++
 test/handler_test.go | 6 ++----
 3 files changed, 12 insertions(+), 9 deletions(-)
 create mode 100644 helper.go

diff --git a/README.md b/README.md
index 9f85c0e..acd77fe 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,6 @@ package main
 
 import (
 	"fmt"
-	"sync"
 
 	"git.apihub24.de/admin/events"
 )
@@ -55,15 +54,14 @@ func main() {
 
 	nameSubscription := handler.Subscribe(NameEventType, func(event events.IEvent) {
 		// read the Name Event Data
-		var data NameEventData
-		_ = event.Data(&data)
+		data, _ := events.ParseEventData[NameEventData](event)
 		// Publish the Greet Event
 		_ = handler.Publish(events.NewEvent(GreetEventType, GreetEventData{Greeting: fmt.Sprintf("Hello, %s", data.Name)}))
 	})
 
 	greetSubscription := handler.Subscribe(GreetEventType, func(event events.IEvent) {
-		var data GreetEventData
-		_ = event.Data(&data)
+		data, _ := events.ParseEventData[GreetEventData](event)
+		println(fmt.Sprintf("%v", data))
 	})
 	// publish the Name Event
 	_ = handler.Publish(nameEvent)
diff --git a/helper.go b/helper.go
new file mode 100644
index 0000000..e945dde
--- /dev/null
+++ b/helper.go
@@ -0,0 +1,7 @@
+package events
+
+func ParseEventData[T any](event IEvent) (T, error) {
+	var d T
+	err := event.Data(&d)
+	return d, err
+}
diff --git a/test/handler_test.go b/test/handler_test.go
index 28f8bff..e1bfa04 100644
--- a/test/handler_test.go
+++ b/test/handler_test.go
@@ -29,8 +29,7 @@ func Test_EventHandler_ShouldHandleSubscriptions(t *testing.T) {
 	wg.Add(2)
 
 	handler.Subscribe(NameEventType, func(event events.IEvent) {
-		var data NameEventData
-		err := event.Data(&data)
+		data, err := events.ParseEventData[NameEventData](event)
 		if err != nil {
 			t.Error(err)
 		}
@@ -42,8 +41,7 @@ func Test_EventHandler_ShouldHandleSubscriptions(t *testing.T) {
 	})
 
 	handler.Subscribe(GreetEventType, func(event events.IEvent) {
-		var data GreetEventData
-		err := event.Data(&data)
+		data, err := events.ParseEventData[GreetEventData](event)
 		if err != nil {
 			t.Error(err)
 		}