core: handle problem projection

packages/hydrooj/src/handler/contest.ts

@@ -104,7 +104,7 @@ export class ContestDetailHandler extends Handler {
             tdoc, tsdoc, udict, page,
         };
         if (contest.isNotStarted(tdoc)) return;
-        const pdict = await problem.getList(domainId, tdoc.pids, true);
+        const pdict = await problem.getList(domainId, tdoc.pids, true, undefined, undefined, problem.PROJECTION_CONTEST_LIST);
         const psdict = {};
         let rdict = {};
         if (tsdoc) {

packages/hydrooj/src/handler/homework.ts

@@ -74,7 +74,7 @@ class HomeworkDetailHandler extends Handler {
             tdoc, tsdoc, udict, ddocs, page, dpcount, dcount,
         };
         if (contest.isNotStarted(tdoc)) return;
-        const pdict = await problem.getList(domainId, tdoc.pids, true);
+        const pdict = await problem.getList(domainId, tdoc.pids, true, undefined, undefined, problem.PROJECTION_CONTEST_LIST);
         const psdict = {};
         let rdict = {};
         if (tsdoc) {

packages/hydrooj/src/handler/problem.ts

@@ -297,6 +297,7 @@ export class ProblemDetailHandler extends ProblemHandler {
             if (!contest.canShowScoreboard(this.tdoc) || !contest.isLocked(this.tdoc)) {
                 delete this.pdoc.nAccept;
                 delete this.pdoc.nSubmit;
+                delete this.pdoc.difficulty;
                 delete this.pdoc.stats;
             }
         } else if (!problem.canViewBy(this.pdoc, this.user)) {