YARA-850

src/helpers/outer-damage-parts.ts

@@ -298,6 +298,48 @@ export function partIdentityKey(p: DamageSelectedPartV2): string {
   return `${p.side}|${p.name}`;
 }
 
+/**
+ * Resolve a client `partId` from claim detail / expert reply to a selected part row.
+ * Accepts `partIdentityKey` values (`id:12`, `left|backfender`), `id:12`, catalog id
+ * when unique, or `index:N` for the Nth entry in `selectedParts`.
+ */
+export function resolveSelectedPartByPartId(
+  partId: string,
+  selected: DamageSelectedPartV2[],
+): DamageSelectedPartV2 | undefined {
+  const raw = String(partId ?? "").trim();
+  if (!raw || !selected.length) return undefined;
+
+  for (const p of selected) {
+    if (partIdentityKey(p) === raw) return p;
+  }
+
+  const idColon = raw.match(/^id:(\d+)$/i);
+  if (idColon) {
+    const id = Number(idColon[1]);
+    return selected.find((p) => p.id === id);
+  }
+
+  const indexColon = raw.match(/^index:(\d+)$/i);
+  if (indexColon) {
+    const i = Number(indexColon[1]);
+    if (Number.isInteger(i) && i >= 0 && i < selected.length) {
+      return selected[i];
+    }
+  }
+
+  if (/^\d+$/.test(raw)) {
+    const n = Number(raw);
+    const byCatalogId = selected.filter((p) => p.id === n);
+    if (byCatalogId.length === 1) return byCatalogId[0];
+    if (Number.isInteger(n) && n >= 0 && n < selected.length) {
+      return selected[n];
+    }
+  }
+
+  return undefined;
+}
+
 /**
  * Same canonical identity as `partIdentityKey`, but derived directly from a
  * unified `carPartDamage` snapshot (the shape we persist on