core: fix when tsdoc doesn't exist

packages/hydrooj/package.json

@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "2.29.19",
+    "version": "2.29.20",
     "bin": "bin/hydrooj.js",
     "main": "dist/loader.js",
     "typings": "dist/loader.d.ts",

packages/hydrooj/src/handler/problem.ts

@@ -91,7 +91,10 @@ export class ProblemMainHandler extends ProblemHandler {
         if (sort) pdocs = pdocs.sort((a, b) => sort.indexOf(a.docId) - sort.indexOf(b.docId));
         if (q) {
             const pdoc = await problem.get(domainId, +q || q, problem.PROJECTION_LIST);
-            if (pdoc) pdocs.filter((doc) => doc.docId !== pdoc.docId).unshift(pdoc);
+            if (pdoc) {
+                pdocs = pdocs.filter((doc) => doc.docId !== pdoc.docId);
+                pdocs.unshift(pdoc);
+            }
         }
         if (this.user.hasPriv(PRIV.PRIV_USER_PROFILE)) {
             psdict = await problem.getListStatus(

packages/hydrooj/src/model/discussion.ts

@@ -245,7 +245,7 @@ export async function getVnode(domainId: string, type: number, id: string, uid?:
         if (!tdoc) throw new DiscussionNodeNotFoundError(id);
         if (uid) {
             const tsdoc = await model.getStatus(domainId, _id, uid);
-            tdoc.attend = tsdoc.attend || tsdoc.enroll;
+            tdoc.attend = tsdoc?.attend || tsdoc?.enroll;
         }
         return { ...tdoc, type, id };
     }