core: add paginator keys

packages/hydrooj/src/handler/contest.ts

@@ -13,7 +13,6 @@ import {
     InvalidTokenError, NotAssignedError, PermissionError, ValidationError,
 } from '../error';
 import { ScoreboardConfig, Tdoc } from '../interface';
-import paginate from '../lib/paginate';
 import { PERM, PRIV, STATUS } from '../model/builtin';
 import * as contest from '../model/contest';
 import * as discussion from '../model/discussion';
@@ -99,7 +98,7 @@ export class ContestListHandler extends Handler {
         const cursor = contest.getMulti(domainId, q).sort({ endAt: -1, beginAt: -1, _id: -1 });
         let qs = rule ? `rule=${rule}` : '';
         if (group) qs += qs ? `&group=${group}` : `group=${group}`;
-        const [tdocs, tpcount] = await paginate<Tdoc>(cursor, page, system.get('pagination.contest'));
+        const [tdocs, tpcount] = await this.paginate(cursor, page, 'contest');
         const tids = [];
         for (const tdoc of tdocs) tids.push(tdoc.docId);
         const tsdict = await contest.getListStatus(domainId, this.user._id, tids);