From e502b39aca348e03493a706c773f55376be4bc18 Mon Sep 17 00:00:00 2001
From: Niels Mokkenstorm <niels@mokkenstorm.dev>
Date: Thu, 16 Jul 2026 22:51:26 +0200
Subject: [PATCH] refactor(server): read variant_source straight off the
 catalog index

adoption_count now reads catalog_index's own maintained tally instead of
calling Constellation live per request, matching releases (already a
direct catalog_index.list read after the row-module extraction). Kills
the browse handler's last per-request network dependency; the unused
Constellation backlink helper and its source constant go with it.
---
 server/src/at_record_server/wiring.gleam | 30 +++++++++---------------
 1 file changed, 11 insertions(+), 19 deletions(-)

diff --git a/server/src/at_record_server/wiring.gleam b/server/src/at_record_server/wiring.gleam
index d4dab8a..3701d7d 100644
--- a/server/src/at_record_server/wiring.gleam
+++ b/server/src/at_record_server/wiring.gleam
@@ -17,10 +17,6 @@ import gleam/dynamic/decode
 import gleam/option.{None}
 import gleam/result
 
-/// Backlink source for adoption: shelf.entry rows whose `release` field
-/// points at the release uri.
-const shelf_entry_release_source = "dev.mokkenstorm.crate.shelf.entry:release.uri"
-
 pub fn context(
   client client: Client,
   static_directory static_directory: String,
@@ -45,25 +41,21 @@ pub fn context(
     catalog:,
     known_users:,
     catalog_index:,
-    variant_source: variant_source(catalog, catalog_index),
+    variant_source: variant_source(catalog_index),
     oauth:,
   )
 }
 
-/// The resolution layer's read port: candidate rows read straight off the
-/// maintained `catalog_index` (its rows already carry the chain edges, so no
-/// per-row fetch is needed), with adoption still tallied live from
-/// Constellation.
-fn variant_source(
-  catalog: catalog_deps.Deps,
-  catalog_index: catalog_index.Store,
-) -> catalog_source.Source {
-  catalog_source.Source(releases: catalog_index.list, adoption_count: fn(uri) {
-    case catalog.backlinks(uri, shelf_entry_release_source) {
-      Ok(page) -> page.total
-      Error(_) -> 0
-    }
-  })
+/// The resolution layer's read port, built directly over the maintained
+/// `catalog_index`: its rows already carry the chain edges, and its own
+/// adoption tally is the same public count Constellation would recompute
+/// live, just already indexed -- so neither field costs a per-request
+/// network round trip.
+fn variant_source(catalog_index: catalog_index.Store) -> catalog_source.Source {
+  catalog_source.Source(
+    releases: catalog_index.list,
+    adoption_count: catalog_index.adoption_count,
+  )
 }
 
 fn text_sender(client: Client) {
-- 
2.51.2