fix: chat accepts posts

internal/repository/social_graph_repo.go

@@ -242,6 +242,35 @@ func (r *BlockRepo) Unblock(ctx context.Context, blockerID, blockedID string) er
 
 // BlockState reports, in one round-trip, whether a blocked b and whether
 // b blocked a.
+// BlockedWith returns the subset of others that viewerID is blocked with in
+// EITHER direction — the set whose content must be hidden from them.
+//
+// The batched counterpart to BlockState, for resolving many authors at once.
+func (r *BlockRepo) BlockedWith(ctx context.Context, viewerID string, others []string) (map[string]bool, error) {
+	out := make(map[string]bool, len(others))
+	if viewerID == "" || len(others) == 0 {
+		return out, nil
+	}
+	rows, err := r.pg.Pool.Query(ctx, `
+		SELECT CASE WHEN blocker_id = $1 THEN blocked_id ELSE blocker_id END
+		FROM user_blocks
+		WHERE (blocker_id = $1 AND blocked_id = ANY($2))
+		   OR (blocked_id = $1 AND blocker_id = ANY($2))`,
+		viewerID, others)
+	if err != nil {
+		return nil, fmt.Errorf("blocked with: %w", err)
+	}
+	defer rows.Close()
+	for rows.Next() {
+		var id string
+		if err := rows.Scan(&id); err != nil {
+			return nil, fmt.Errorf("scan blocked with: %w", err)
+		}
+		out[id] = true
+	}
+	return out, rows.Err()
+}
+
 func (r *BlockRepo) BlockState(ctx context.Context, a, b string) (aBlockedB, bBlockedA bool, err error) {
 	err = r.pg.Pool.QueryRow(ctx, `
 		SELECT