deduplicate task parsing and masking helpers

apps/backend/src/services/claim/session/shared.ts

@@ -1,6 +1,11 @@
 import { buildClaimUrl } from '../claim-service.js'
 import { createHttpError } from '../../../utils/http.js'
+import { maskCode as maskCodeValue } from '../../../utils/masking.js'
 import { formatFenToAmount, normalizeFen } from '../../../utils/money.js'
+import {
+  parseTaskContext as parseTaskContextValue,
+  parseTaskState as parseTaskStateValue,
+} from '../../../utils/task-json.js'
 
 export const CLAIM_TERMINAL_STATUSES = new Set(['expired', 'closed'])
 export const REDEEM_REPLACEMENT_LIMIT = 10
@@ -178,21 +183,7 @@ export function mergeTaskContext(task, patch = {}) {
 }
 
 export function parseTaskState(task) {
-  const value = task?.state_json
-
-  if (!value) {
-    return {}
-  }
-
-  if (typeof value === 'object') {
-    return value
-  }
-
-  try {
-    return JSON.parse(String(value || '{}'))
-  } catch {
-    return {}
-  }
+  return parseTaskStateValue(task)
 }
 
 export function isAssistedClaimTask(task) {
@@ -200,21 +191,7 @@ export function isAssistedClaimTask(task) {
 }
 
 export function parseTaskContext(task) {
-  const value = task?.context_json
-
-  if (!value) {
-    return {}
-  }
-
-  if (typeof value === 'object') {
-    return value
-  }
-
-  try {
-    return JSON.parse(String(value || '{}'))
-  } catch {
-    return {}
-  }
+  return parseTaskContextValue(task)
 }
 
 export function normalizeClaimLoginType(loginType) {
@@ -227,15 +204,5 @@ export function isRecoverableSessionError(error) {
 }
 
 export function maskCode(value) {
-  const text = String(value || '').trim()
-
-  if (!text) {
-    return ''
-  }
-
-  if (text.length <= 8) {
-    return `${text.slice(0, 2)}****${text.slice(-2)}`
-  }
-
-  return `${text.slice(0, 4)}****${text.slice(-4)}`
+  return maskCodeValue(value, { shortMask: '****' })
 }