moved middleware event publisher to sse package

internal/server/api/accounts/router.go

@@ -9,6 +9,7 @@ import (
 	"ruben/inventory2/internal/logging"
 	"ruben/inventory2/internal/server/middleware"
 	"ruben/inventory2/internal/server/response"
+	"ruben/inventory2/internal/server/sse"
 	"strconv"
 
 	"github.com/gin-gonic/gin"
@@ -23,7 +24,7 @@ func Routes(
 	r *gin.RouterGroup,
 	logger *logging.Logger,
 	accts *accounts.Store,
-	pub *middleware.UpdateNotificationPublisher,
+	pub *sse.UpdateNotificationPublisher,
 ) {
 	as := &accountSubrouter{
 		log:   logger,

internal/server/api/apis.go

@@ -22,7 +22,7 @@ func Routes(
 	auth *middleware.Auth,
 	sq *sse.Queue,
 	accts *accounts.Store,
-	unp *middleware.UpdateNotificationPublisher,
+	unp *sse.UpdateNotificationPublisher,
 	rawEvents *raw_events.Store,
 	etsy *etsy_platform.Platform,
 ) {

internal/server/server.go

@@ -79,9 +79,11 @@ func NewRouter(
 
 	// sse setup
 	sq := sse.NewQueue()
-	unp := middleware.NewUpdateNotificationPublisher(
+	unp := sq.NewUpdateNotificationPublisher(
 		logger.WithGroup("update.notification.publisher"),
-		sq,
+		func(c *gin.Context) int64 {
+			return middleware.GetIdentity(c).Account.AccountID
+		},
 	).Trim("/api")
 
 	api.Routes(

internal/server/sse/publisher.go

@@ -1,31 +1,40 @@
-package middleware
+package sse
 
 import (
 	"context"
 	"fmt"
 	"path"
-	"ruben/inventory2/internal/logging"
-	"ruben/inventory2/internal/server/sse"
 	"strings"
 	"time"
 
 	"github.com/gin-gonic/gin"
+
+	"ruben/inventory2/internal/logging"
 )
 
-type UpdateNotificationPublisher struct {
+type (
+	UpdateNotificationPublisher struct {
 		log             *logging.Logger
-	sse             *sse.Queue
+		queue           sender
+		getAccountID    func(*gin.Context) int64
 		trimBasePath    string
 		basePathPattern string
-}
+	}
 
-func NewUpdateNotificationPublisher(
+	// sender is satisfied by *Queue
+	sender interface {
+		Send(ctx context.Context, e Event) error
+	}
+)
+
+func (q *Queue) NewUpdateNotificationPublisher(
 	log *logging.Logger,
-	sse *sse.Queue,
+	getAccountID func(*gin.Context) int64,
 ) *UpdateNotificationPublisher {
 	return &UpdateNotificationPublisher{
 		log:          log,
-		sse: sse,
+		queue:        q,
+		getAccountID: getAccountID,
 	}
 }
 
@@ -46,7 +55,8 @@ func (p *UpdateNotificationPublisher) Group(pathPattern string) *UpdateNotificat
 	return &p2
 }
 
-// Publish must be applied AFTER a middleware puts in the Identity into the gin.Context.
+// Publish constructs a gin middleware.
+// It must used with and after middleware puts in the Identity into the gin.Context.
 func (p *UpdateNotificationPublisher) Publish(pathPattern string) gin.HandlerFunc {
 	trimBasePathSegs := getPathSegments(p.trimBasePath)
 	trimmedBasePathPattern := path.Join(p.basePathPattern, pathPattern)
@@ -92,13 +102,13 @@ func (p *UpdateNotificationPublisher) Publish(pathPattern string) gin.HandlerFun
 			parentEvent = e
 		}
 
-		acctID := GetIdentity(c).Account.AccountID
+		acctID := p.getAccountID(c)
 		for _, e := range events {
 			go func() {
 				ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
 				defer cancel()
 
-				if err := p.sse.Send(ctx, sse.Event{
+				if err := p.queue.Send(ctx, Event{
 					AccountID: acctID,
 					Type:      e,
 					Data:      []byte(fmt.Sprintf(`{"eventType": %q}`, e)),