deduplicate json config file access

apps/backend/src/services/order/fulfillment-binding-config-service.ts

@@ -1,7 +1,7 @@
-import fs from 'node:fs'
 import path from 'node:path'
 
 import { PROJECT_ROOT } from '../../config/runtime.js'
+import { readJsonFile, writeJsonFile } from '../../utils/json-file-store.js'
 
 const ORDER_FULFILLMENT_BINDINGS_FILE_PATH = path.join(PROJECT_ROOT, 'data', 'order-fulfillment-bindings.json')
 
@@ -20,28 +20,19 @@ export function getLegacyOrderFulfillmentBindingConfigs() {
 }
 
 export function saveOrderFulfillmentBindingConfigs(rawValue) {
-  const normalized = normalizeOrderFulfillmentBindingConfigs(rawValue)
-  fs.mkdirSync(path.dirname(ORDER_FULFILLMENT_BINDINGS_FILE_PATH), { recursive: true })
-  fs.writeFileSync(
+  return writeJsonFile(
     ORDER_FULFILLMENT_BINDINGS_FILE_PATH,
-    `${JSON.stringify(normalized, null, 2)}\n`,
-    'utf8',
+    rawValue,
+    normalizeOrderFulfillmentBindingConfigs,
   )
-  return normalized
 }
 
 function loadOrderFulfillmentBindingConfigsFromFile() {
-  if (!fs.existsSync(ORDER_FULFILLMENT_BINDINGS_FILE_PATH)) {
-    return []
-  }
-
-  try {
-    const rawText = fs.readFileSync(ORDER_FULFILLMENT_BINDINGS_FILE_PATH, 'utf8')
-    const parsed = JSON.parse(rawText)
-    return normalizeOrderFulfillmentBindingConfigs(parsed)
-  } catch {
-    return []
-  }
+  return readJsonFile(
+    ORDER_FULFILLMENT_BINDINGS_FILE_PATH,
+    [],
+    normalizeOrderFulfillmentBindingConfigs,
+  )
 }
 
 function normalizeOrderFulfillmentBindingConfigs(rawValue) {