fix: api rate limit

internal/handler/social.go

@@ -12,6 +12,7 @@ import (
 	"net/http"
 	"strconv"
 	"strings"
+	"time"
 
 	"github.com/go-chi/chi/v5"
 	"github.com/prabhupadasays/spsays-bff/internal/middleware"
@@ -258,6 +259,17 @@ func (h *PostHandler) Unhide(w http.ResponseWriter, r *http.Request) {
 func (h *PostHandler) ListMine(w http.ResponseWriter, r *http.Request) {
 	uid := middleware.UserID(r.Context())
 	limit, offset := parseLimitOffset(r)
+	// Keyset path (scroll feed): a `before` cursor pages older posts. Without a
+	// cursor we keep the offset+meta path the profile grid relies on.
+	if beforeAt, beforeID, ok := parseCursor(r); ok {
+		posts, err := h.svc.ListMineKeyset(r.Context(), uid, beforeAt, beforeID, limit)
+		if err != nil {
+			mapSocialErr(w, err)
+			return
+		}
+		response.JSON(w, http.StatusOK, posts)
+		return
+	}
 	posts, total, err := h.svc.ListMine(r.Context(), uid, limit, offset)
 	if err != nil {
 		mapSocialErr(w, err)
@@ -719,6 +731,22 @@ func (h *ProfileHandler) Feed(w http.ResponseWriter, r *http.Request) {
 	// gateByBlock already resolved the owner, so list by id rather than
 	// re-resolving the handle. Hidden posts never appear here (they live in
 	// the owner's separate Hidden tab).
+	//
+	// Keyset path (scroll feed): a `before` cursor pages older posts. Without a
+	// cursor we keep the offset+meta path the profile grid relies on.
+	if beforeAt, beforeID, ok := parseCursor(r); ok {
+		posts, err := h.posts.ListByUserKeyset(r.Context(), owner.ID, beforeAt, beforeID, limit)
+		if err != nil {
+			mapSocialErr(w, err)
+			return
+		}
+		if err := h.hydrateFeed(r, posts); err != nil {
+			mapSocialErr(w, err)
+			return
+		}
+		response.JSON(w, http.StatusOK, posts)
+		return
+	}
 	posts, total, err := h.posts.ListByUser(r.Context(), owner.ID, limit, offset)
 	if err != nil {
 		mapSocialErr(w, err)
@@ -896,6 +924,22 @@ func parseLimitOffset(r *http.Request) (limit, offset int) {
 	return limit, offset
 }
 
+// parseCursor reads an optional keyset cursor for the scroll feed: `before` is
+// the last seen post's created_at (RFC3339Nano) and `before_id` its id. ok is
+// false when either is missing or unparseable (callers then page by offset).
+func parseCursor(r *http.Request) (beforeAt time.Time, beforeID string, ok bool) {
+	at := strings.TrimSpace(r.URL.Query().Get("before"))
+	id := strings.TrimSpace(r.URL.Query().Get("before_id"))
+	if at == "" || id == "" {
+		return time.Time{}, "", false
+	}
+	t, err := time.Parse(time.RFC3339Nano, at)
+	if err != nil {
+		return time.Time{}, "", false
+	}
+	return t, id, true
+}
+
 func paginationMeta(total, limit, offset int) *response.Meta {
 	if limit == 0 {
 		limit = 20