core&ui: add contest/homework group filter (#589)

packages/hydrooj/src/handler/contest.ts

@@ -73,32 +73,37 @@ ScheduleModel.Worker.addHandler('contest', async (doc) => {
 
 export class ContestListHandler extends Handler {
     @param('rule', Types.Range(contest.RULES), true)
+    @param('group', Types.Name, true)
     @param('page', Types.PositiveInt, true)
-    async get(domainId: string, rule = '', page = 1) {
+    async get(domainId: string, rule = '', group = '', page = 1) {
         if (rule && contest.RULES[rule].hidden) throw new BadRequestError();
+        const groups = (await user.listGroup(domainId, this.user._id)).map((i) => i.name);
+        if (group && !groups.includes(group)) throw new NotAssignedError(group);
         const rules = Object.keys(contest.RULES).filter((i) => !contest.RULES[i].hidden);
         const q = {
-            ...this.user.hasPerm(PERM.PERM_VIEW_HIDDEN_CONTEST)
+            ...this.user.hasPerm(PERM.PERM_VIEW_HIDDEN_CONTEST) && !group
                 ? {}
                 : {
                     $or: [
                         { maintainer: this.user._id },
                         { owner: this.user._id },
-                        { assign: { $in: this.user.group } },
+                        { assign: { $in: groups } },
                         { assign: { $size: 0 } },
                     ],
                 },
             ...rule ? { rule } : { rule: { $in: rules } },
+            ...group ? { assign: { $in: [group] } } : {},
         };
         const cursor = contest.getMulti(domainId, q);
-        const qs = rule ? `rule=${rule}` : '';
+        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 tids = [];
         for (const tdoc of tdocs) tids.push(tdoc.docId);
         const tsdict = await contest.getListStatus(domainId, this.user._id, tids);
         this.response.template = 'contest_main.html';
         this.response.body = {
-            page, tpcount, qs, rule, tdocs, tsdict,
+            page, tpcount, qs, rule, tdocs, tsdict, groups, group,
         };
     }
 }