deduplicate json config file access

apps/backend/src/services/scheduler/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 SCHEDULED_JOBS_FILE_PATH = path.join(PROJECT_ROOT, 'data', 'scheduled-jobs.json')
 const CLOUDTENTACLES_HEALTH_JOB_ID = 'cloudtentacles-health'
@@ -17,10 +17,7 @@ export function getScheduledJobsConfig() {
 }
 
 export function saveScheduledJobsConfig(rawValue: unknown) {
-  const normalized = normalizeScheduledJobsConfig(rawValue)
-  fs.mkdirSync(path.dirname(SCHEDULED_JOBS_FILE_PATH), { recursive: true })
-  fs.writeFileSync(SCHEDULED_JOBS_FILE_PATH, `${JSON.stringify(normalized, null, 2)}\n`, 'utf8')
-  return normalized
+  return writeJsonFile(SCHEDULED_JOBS_FILE_PATH, rawValue, normalizeScheduledJobsConfig)
 }
 
 export function getCloudtentaclesHealthJob(config: JsonObject = getScheduledJobsConfig()) {
@@ -30,16 +27,11 @@ export function getCloudtentaclesHealthJob(config: JsonObject = getScheduledJobs
 }
 
 function loadScheduledJobsConfigFromFile() {
-  if (!fs.existsSync(SCHEDULED_JOBS_FILE_PATH)) {
-    return createDefaultScheduledJobsConfig()
-  }
-
-  try {
-    const rawText = fs.readFileSync(SCHEDULED_JOBS_FILE_PATH, 'utf8')
-    return normalizeScheduledJobsConfig(JSON.parse(rawText))
-  } catch {
-    return createDefaultScheduledJobsConfig()
-  }
+  return readJsonFile(
+    SCHEDULED_JOBS_FILE_PATH,
+    createDefaultScheduledJobsConfig,
+    normalizeScheduledJobsConfig,
+  )
 }
 
 function normalizeScheduledJobsConfig(rawValue: unknown) {