listen to correct topic

cmd/backoffice/main.go

@@ -3,6 +3,7 @@ package main
 import (
 	"context"
 	"errors"
+	"fmt"
 	"log"
 	"net/http"
 	"os"
@@ -12,6 +13,7 @@ import (
 	actor "git.tornberg.me/go-cart-actor/pkg/actor"
 	"git.tornberg.me/go-cart-actor/pkg/cart"
 	messages "git.tornberg.me/go-cart-actor/pkg/messages"
+	"github.com/matst80/slask-finder/pkg/messaging"
 	amqp "github.com/rabbitmq/amqp091-go"
 )
 
@@ -52,59 +54,21 @@ func buildRegistry() actor.MutationRegistry {
 	return reg
 }
 
-func startMutationConsumer(ctx context.Context, amqpURL string, hub *Hub) error {
+func startMutationConsumer(ctx context.Context, conn *amqp.Connection, hub *Hub) error {
-	conn, err := amqp.Dial(amqpURL)
-	if err != nil {
-		return err
-	}
 	ch, err := conn.Channel()
 	if err != nil {
 		_ = conn.Close()
 		return err
 	}
+	msgs, err := messaging.DeclareBindAndConsume(ch, "cart", "mutation")
+	if err != nil {
+		_ = ch.Close()
+		return err
+	}
 
-	// declare exchange (idempotent)
-	if err := ch.ExchangeDeclare(
-		"cart",  // name
-		"topic", // type
-		true,    // durable
-		false,   // autoDelete
-		false,   // internal
-		false,   // noWait
-		nil,     // args
-	); err != nil {
-		_ = ch.Close()
-		_ = conn.Close()
-		return err
-	}
-	// declare an exclusive, auto-deleted queue by default
-	q, err := ch.QueueDeclare(
-		"",    // name -> let server generate
-		false, // durable
-		true,  // autoDelete
-		true,  // exclusive
-		false, // noWait
-		nil,   // args
-	)
-	if err != nil {
-		_ = ch.Close()
-		_ = conn.Close()
-		return err
-	}
-	if err := ch.QueueBind(q.Name, "mutation", "cart", false, nil); err != nil {
-		_ = ch.Close()
-		_ = conn.Close()
-		return err
-	}
-	msgs, err := ch.Consume(q.Name, "backoffice", true, true, false, false, nil)
-	if err != nil {
-		_ = ch.Close()
-		_ = conn.Close()
-		return err
-	}
 	go func() {
 		defer ch.Close()
-		defer conn.Close()
+
 		for {
 			select {
 			case <-ctx.Done():
@@ -185,7 +149,11 @@ func main() {
 	defer cancel()
 
 	if amqpURL != "" {
-		if err := startMutationConsumer(ctx, amqpURL, hub); err != nil {
+		conn, err := amqp.Dial(amqpURL)
+		if err != nil {
+			fmt.Errorf("failed to connect to RabbitMQ: %w", err)
+		}
+		if err := startMutationConsumer(ctx, conn, hub); err != nil {
 			log.Printf("AMQP listener disabled: %v", err)
 		} else {
 			log.Printf("AMQP listener connected")