feat(P2): SSE 实时消息通知 — 点赞/评论/关注事件推送 + Notification 表

backend/internal/http/router.go

@@ -1,6 +1,7 @@
 package http
 
 import (
+	"context"
 	"feedsystem_video_go/internal/account"
 	"feedsystem_video_go/internal/feed"
 	"feedsystem_video_go/internal/middleware/jwt"
@@ -179,5 +180,45 @@ func SetRouter(db *gorm.DB, cache *rediscache.Client, rmq *rabbitmq.RabbitMQ) *g
 	}
 	worker.StartOutboxPoller(db, timelineMQ)
 	worker.StartConsumer(timelineMQ, "video.timeline.update.queue", cache)
+
+	// SSE notification
+	if rmq != nil && rmq.Ch != nil {
+		rmq.DeclareTopic("like.events", "notification.like", "like.like")
+		rmq.DeclareTopic("comment.events", "notification.comment", "comment.publish")
+		rmq.DeclareTopic("social.events", "notification.social", "social.follow")
+	}
+	sseHub := worker.NewSSEHub(db)
+	notifGroup := r.Group("/notification")
+	notifGroup.Use(sseHub.SSERequireAuth())
+	sseHub.RegisterRoutes(r, notifGroup)
+
+	go func() {
+		if rmq != nil && rmq.Ch != nil {
+			hub := sseHub
+			ctx := context.Background()
+			// consume from like queue
+			go func() {
+				w := worker.NewNotificationWorker(rmq.Ch, db, "notification.like", hub)
+				if err := w.Run(ctx); err != nil {
+					log.Printf("notification-like worker: %v", err)
+				}
+			}()
+			go func() {
+				w := worker.NewNotificationWorker(rmq.Ch, db, "notification.comment", hub)
+				if err := w.Run(ctx); err != nil {
+					log.Printf("notification-comment worker: %v", err)
+				}
+			}()
+			go func() {
+				w := worker.NewNotificationWorker(rmq.Ch, db, "notification.social", hub)
+				if err := w.Run(ctx); err != nil {
+					log.Printf("notification-social worker: %v", err)
+				}
+			}()
+		} else {
+			log.Printf("Notification SSE disabled (MQ not available)")
+		}
+	}()
+
 	return r
 }