fix: feed repitition

internal/server/server.go

@@ -56,6 +56,7 @@ type Server struct {
 	collectionH    *handler.CollectionHandler
 	profileH       *handler.ProfileHandler
 	relationH      *handler.RelationshipHandler
+	soketiWebhookH *handler.SoketiWebhookHandler
 	notificationH  *handler.NotificationHandler
 	sadhnaH        *handler.SadhnaHandler
 	pushH          *handler.PushHandler
@@ -168,7 +169,13 @@ func (s *Server) initAuth(cfg *config.Config, logger *zap.Logger) {
 	likeRepo := repository.NewLikeRepo(s.pg, s.redis, logger)
 	mentionRepo := repository.NewMentionRepo(s.pg)
 	commentRepo := repository.NewCommentRepo(s.pg, logger)
-	postSvc := service.NewPostService(postRepo, r2, likeRepo, mentionRepo, commentRepo)
+	// Per-user "already served" set so the home feed never repeats posts
+	// across pages (nil-safe — falls back to offset paging without Redis).
+	feedRepo := repository.NewFeedRepo(s.redis, logger)
+	postSvc := service.NewPostService(postRepo, r2, likeRepo, mentionRepo, commentRepo, feedRepo)
+	// Soketi signs webhooks with the app secret; on channel_vacated for a
+	// per-user notifications channel we evict that user's feed seen-set.
+	s.soketiWebhookH = handler.NewSoketiWebhookHandler(cfg.SoketiAppKey, cfg.SoketiAppSecret, feedRepo, logger)
 	bookmarkSvc := service.NewBookmarkService(userRepo, bookmarkRepo)
 	collectionSvc := service.NewCollectionService(userRepo, collectionRepo, postRepo, r2)
 
@@ -765,6 +772,13 @@ func (s *Server) setupRouter() {
 		// present, so the feed can carry `viewer_has_reshared` on each
 		// post. Without a cookie the routes still respond — they just
 		// return the anonymous shape (all-false).
+		// Soketi webhooks — server-to-server, authenticated by the HMAC
+		// signature (not a session). channel_vacated on a per-user
+		// notifications channel evicts that user's feed seen-set.
+		if s.soketiWebhookH != nil {
+			r.Post("/webhooks/soketi", s.soketiWebhookH.Handle)
+		}
+
 		// Home feed — the global, personalised feed of posts + its "new on
 		// the platform" discovery strip. Auth-required (the feed is
 		// per-viewer: ordering + relationship flags depend on the caller).
@@ -777,6 +791,8 @@ func (s *Server) setupRouter() {
 				r.Use(middleware.RequireAuth(s.authIssuer, s.userRepo))
 				r.Get("/", s.postH.Feed)
 				r.Get("/new-users", s.postH.FeedNewUsers)
+				// Clear the per-user seen-set (logout / page unload).
+				r.Post("/reset", s.postH.FeedReset)
 			})
 		})