replace String.random with randomstring

packages/hydrooj/src/handler/contest.ts

@@ -5,7 +5,7 @@ import { escapeRegExp, pick } from 'lodash';
 import moment from 'moment-timezone';
 import { ObjectId } from 'mongodb';
 import {
-    Counter, sortFiles, Time, yaml,
+    Counter, diffArray, randomstring, sortFiles, Time, yaml,
 } from '@hydrooj/utils/lib/utils';
 import { Context, Service } from '../context';
 import {
@@ -317,7 +317,7 @@ export class ContestEditHandler extends Handler {
                 title, content, rule, beginAt, endAt, pids, rated, duration: contestDuration,
             });
             if (this.tdoc.beginAt !== beginAt || this.tdoc.endAt !== endAt
-                || Array.isDiff(this.tdoc.pids, pids) || this.tdoc.rule !== rule
+                || diffArray(this.tdoc.pids, pids) || this.tdoc.rule !== rule
                 || lockAt !== this.tdoc.lockAt) {
                 await contest.recalcStatus(domainId, this.tdoc.docId);
             }
@@ -484,7 +484,7 @@ export class ContestManagementHandler extends ContestManagementBaseHandler {
         if (size >= system.get('limit.contest_files_size')) {
             throw new FileLimitExceededError('size');
         }
-        filename ||= file.originalFilename || String.random(16);
+        filename ||= file.originalFilename || randomstring(16);
         await storage.put(`contest/${domainId}/${tid}/${filename}`, file.filepath, this.user._id);
         const meta = await storage.getMeta(`contest/${domainId}/${tid}/${filename}`);
         const payload = { _id: filename, name: filename, ...pick(meta, ['size', 'lastModified', 'etag']) };