core: contest team (#1183)

packages/hydrooj/locales/zh.yaml

@@ -489,6 +489,40 @@ Materials: 材料
 Max files for user: 单用户最大文件数量
 Max files per problem: 单题最大文件数量
 Max files size per problem: 单题最大总文件大小
+Max members per contest team: 每个参赛队伍最大成员数
+Accept: 接受
+Reject: 拒绝
+Allow Team: 允许团队
+Allow team participation: 允许团队参赛
+Choose how you want to participate in this contest.: 选择你参加本次比赛的方式。
+Create a Team: 创建队伍
+'Create a team, invite teammates by their username, then choose "Team Participation" when attending an allow-team contest.': 创建队伍，按用户名邀请队友，之后在报名允许团队的比赛时选择“团队参赛”。
+How It Works: 使用说明
+Invitation code: 邀请码
+Invitation code is required.: 必须填写邀请码。
+Invitation sent: 邀请已发送
+Invite Member: 邀请成员
+Leave Team: 退出队伍
+Leave this team? You may lose access to team contests.: 确定退出该队伍吗？退出后你可能无法访问该队伍参加的比赛。
+Manage Teams: 管理队伍
+Members: 成员
+My Teams: 我的队伍
+Once enabled, team participation cannot be disabled for this contest.: 一旦启用，该比赛将无法关闭团队参赛。
+Pending Invites: 待处理邀请
+Personal Participation: 个人参赛
+Please select a team.: 请选择一个队伍。
+Rename: 重命名
+Revoke: 撤销
+Save: 保存
+Successfully attended: 报名成功
+Team: 队伍
+Team Participation: 团队参赛
+Team name: 队伍名称
+Team participation is not allowed for this contest.: 该比赛不允许团队参赛。
+Teams let multiple users participate in a contest together, sharing one set of submissions.: 队伍允许多名用户共同参加比赛，共享同一份提交记录。
+You are not in any team.: 你还没有加入任何队伍。
+You are not in any team yet. Create one from the panel on the right, or ask a teammate to invite you by your username.: 你还没有加入任何队伍。在右侧面板创建一个，或请队友按你的用户名邀请你。
+'You have {0} pending team invite(s)': '你有 {0} 个待处理的队伍邀请'
 Max pretest count per minute: 每分钟自测数量限制
 Max submission count per minute: 每分钟提交数量限制
 Max total file size for user: 单用户最大总文件大小

packages/hydrooj/locales/zh_TW.yaml

@@ -486,6 +486,40 @@ Materials: 材料
 Max files for user: 單使用者最大檔案數量
 Max files per problem: 單題最大檔案數量
 Max files size per problem: 單題最大總檔案大小
+Max members per contest team: 每個參賽隊伍最大成員數
+Accept: 接受
+Reject: 拒絕
+Allow Team: 允許團隊
+Allow team participation: 允許團隊參賽
+Choose how you want to participate in this contest.: 選擇你參加本次比賽的方式。
+Create a Team: 建立隊伍
+'Create a team, invite teammates by their username, then choose "Team Participation" when attending an allow-team contest.': 建立隊伍，以使用者名稱邀請隊友，之後在報名允許團隊的比賽時選擇「團隊參賽」。
+How It Works: 使用說明
+Invitation code: 邀請碼
+Invitation code is required.: 必須填寫邀請碼。
+Invitation sent: 邀請已發送
+Invite Member: 邀請成員
+Leave Team: 退出隊伍
+Leave this team? You may lose access to team contests.: 確定退出該隊伍嗎？退出後你可能無法存取該隊伍參加的比賽。
+Manage Teams: 管理隊伍
+Members: 成員
+My Teams: 我的隊伍
+Once enabled, team participation cannot be disabled for this contest.: 一旦啟用，該比賽將無法關閉團隊參賽。
+Pending Invites: 待處理邀請
+Personal Participation: 個人參賽
+Please select a team.: 請選擇一個隊伍。
+Rename: 重新命名
+Revoke: 撤銷
+Save: 儲存
+Successfully attended: 報名成功
+Team: 隊伍
+Team Participation: 團隊參賽
+Team name: 隊伍名稱
+Team participation is not allowed for this contest.: 該比賽不允許團隊參賽。
+Teams let multiple users participate in a contest together, sharing one set of submissions.: 隊伍允許多名使用者共同參加比賽，共享同一份提交記錄。
+You are not in any team.: 你還沒有加入任何隊伍。
+You are not in any team yet. Create one from the panel on the right, or ask a teammate to invite you by your username.: 你還沒有加入任何隊伍。在右側面板建立一個，或請隊友以你的使用者名稱邀請你。
+'You have {0} pending team invite(s)': '你有 {0} 個待處理的隊伍邀請'
 Max pretest count per minute: 每分鐘自測數量限制
 Max submission count per minute: 每分鐘提交數量限制
 Max total file size for user: 單使用者最大總檔案大小

packages/hydrooj/src/error.ts

@@ -34,6 +34,7 @@ export const PrivilegeError = Err('PrivilegeError', ForbiddenError, function (th
 export const ContestNotAttendedError = Err('ContestNotAttendedError', ForbiddenError, "You haven't attended this contest yet.");
 export const RequireProError = Err('RequireProError', ForbiddenError, 'RequireProError');
 export const ContestAlreadyAttendedError = Err('ContestAlreadyAttendedError', ForbiddenError, "You've already attended this contest.");
+export const TeamMemberLimitError = Err('TeamMemberLimitError', ForbiddenError, 'Team is full (maximum {0} members).');
 export const ContestNotLiveError = Err('ContestNotLiveError', ForbiddenError, 'This contest is not live.');
 export const ContestAlreadyStartedError = Err('ContestAlreadyStartedError', ForbiddenError, 'This contest has already started.');
 export const ContestNotEndedError = Err('ContestNotEndedError', ForbiddenError, 'This contest is not ended.');
@@ -48,7 +49,12 @@ export const DomainJoinAlreadyMemberError = Err('DomainJoinAlreadyMemberError',
 export const InvalidJoinInvitationCodeError = Err('InvalidJoinInvitationCodeError', ForbiddenError, 'The invitation code you provided is invalid.');
 export const CurrentPasswordError = Err('CurrentPasswordError', ForbiddenError, "Current password doesn't match.");
 export const DiscussionLockedError = Err('DiscussionLockedError', ForbiddenError, 'The discussion is locked, you can not reply anymore.');
-export const NotAssignedError = Err('NotAssignedError', ForbiddenError, 'You are not assigned to this {0}.');
+export const NotAssignedError = Err('NotAssignedError', ForbiddenError, function (this: HydroError) {
+    if (this.params.length >= 3) {
+        return 'Team member {2} is not assigned to this {0}.';
+    }
+    return 'You are not assigned to this {0}.';
+});
 export const FileLimitExceededError = Err('FileLimitExceededError', ForbiddenError, 'File {0} limit exceeded.');
 export const FileUploadError = Err('FileUploadError', ForbiddenError, 'File upload failed.');
 export const FileExistsError = Err('FileExistsError', ForbiddenError, 'File {0} already exists.');

packages/hydrooj/src/handler/contest.ts

@@ -10,9 +10,10 @@ import {
 } from '@hydrooj/utils/lib/utils';
 import { Context, Service } from '../context';
 import {
-    BadRequestError, ContestAlreadyStartedError, ContestNotAttendedError, ContestNotEndedError, ContestNotFoundError,
-    ContestNotLiveError, ContestScoreboardHiddenError, FileLimitExceededError, FileUploadError,
-    InvalidTokenError, MethodNotAllowedError, NotAssignedError, NotFoundError, PermissionError, ValidationError,
+    BadRequestError, ContestAlreadyAttendedError, ContestAlreadyStartedError, ContestNotAttendedError, ContestNotEndedError,
+    ContestNotFoundError, ContestNotLiveError, ContestScoreboardHiddenError, FileLimitExceededError, FileUploadError,
+    InvalidTokenError, MethodNotAllowedError, NotAssignedError, NotFoundError, PermissionError, TeamMemberLimitError,
+    ValidationError,
 } from '../error';
 import { ContestStatusDoc, FileInfo, ScoreboardConfig, Tdoc } from '../interface';
 import { PERM, PRIV, STATUS } from '../model/builtin';
@@ -78,14 +79,16 @@ export class ContestListHandler extends Handler {
 export class ContestDetailBaseHandler extends Handler {
     tdoc?: Tdoc;
     tsdoc?: ContestStatusDoc;
+    team?: number;
 
     @param('tid', Types.ObjectId, true)
     async __prepare(domainId: string, tid: ObjectId) {
         if (!tid) return; // ProblemDetailHandler also extends from ContestDetailBaseHandler
-        [this.tdoc, this.tsdoc] = await Promise.all([
-            contest.get(domainId, tid),
-            contest.getStatus(domainId, tid, this.user._id),
-        ]);
+        this.tdoc = await contest.get(domainId, tid);
+        if (this.tdoc.allowTeam) {
+            this.team = await contest.getTeamVid(domainId, tid, this.user._id) || undefined;
+        }
+        this.tsdoc = await contest.getStatus(domainId, tid, this.team ?? this.user._id);
         if (this.tdoc.assign?.length && !this.user.own(this.tdoc) && !this.user.hasPerm(PERM.PERM_VIEW_HIDDEN_CONTEST)) {
             const groups = await user.listGroup(domainId, this.user._id);
             if (!new Set(this.tdoc.assign).intersection(new Set(groups.map((i) => i.name))).size) {
@@ -103,7 +106,11 @@ export class ContestDetailBaseHandler extends Handler {
 
     tsdocAsPublic() {
         if (!this.tsdoc) return null;
-        return pick(this.tsdoc, ['attend', 'subscribe', 'startAt', ...(this.tdoc.duration || this.tsdoc.endAt ? ['endAt'] : [])]);
+        return pick(this.tsdoc, [
+            'attend', 'subscribe', 'startAt',
+            'displayName', 'members', // for team
+            ...(this.tdoc.duration || this.tsdoc.endAt ? ['endAt'] : []),
+        ]);
     }
 
     @param('tid', Types.ObjectId, true)
@@ -158,11 +165,17 @@ export class ContestDetailHandler extends ContestDetailBaseHandler {
     @param('tid', Types.ObjectId)
     async get(domainId: string, tid: ObjectId) {
         this.response.template = 'contest_detail.html';
-        const udict = await user.getList(domainId, [this.tdoc.owner]);
+        const [udict, teamVdocs] = await Promise.all([
+            user.getList(domainId, [this.tdoc.owner]),
+            this.tdoc.allowTeam && this.user.hasPriv(PRIV.PRIV_USER_PROFILE)
+                ? user.getVusersByMember(this.user._id, { _id: 1, displayName: 1, members: 1 })
+                : [],
+        ]);
         this.response.body = {
             tdoc: this.tdoc,
             tsdoc: this.tsdocAsPublic(),
             udict,
+            team_vdocs: teamVdocs,
             files: (this.tsdoc?.attend && !contest.isNotStarted(this.tdoc)) ? sortFiles(this.tdoc.privateFiles || []) : [],
             urlForFile: (filename: string) => this.url('contest_file_download', { tid, filename, type: 'private' }),
         };
@@ -174,11 +187,42 @@ export class ContestDetailHandler extends ContestDetailBaseHandler {
 
     @param('tid', Types.ObjectId)
     @param('code', Types.String, true)
-    async postAttend(domainId: string, tid: ObjectId, code = '') {
+    @param('vuid', Types.Int, true)
+    async postAttend(domainId: string, tid: ObjectId, code = '', vuid?: number) {
         this.checkPerm(PERM.PERM_ATTEND_CONTEST);
         if (contest.isDone(this.tdoc)) throw new ContestNotLiveError(domainId, tid);
         if (this.tdoc._code && code !== this.tdoc._code) throw new InvalidTokenError('Contest Invitation', code);
-        await contest.attend(domainId, tid, this.user._id, { subscribe: 1 });
+        if (vuid) {
+            if (!this.tdoc.allowTeam) throw new ValidationError('allowTeam');
+            const v = await user.getVuserById(vuid);
+            if (!v?.members?.includes(this.user._id)) throw new PermissionError(PERM.PERM_ATTEND_CONTEST);
+            if (this.tdoc.assign?.length) {
+                const memberUdict = await user.getList(domainId, v.members);
+                for (const uid of v.members) {
+                    if (uid === this.tdoc.owner) continue;
+                    const m = memberUdict[uid];
+                    if (m?.hasPerm(PERM.PERM_VIEW_HIDDEN_CONTEST)) continue;
+                    if (!new Set(this.tdoc.assign).intersection(new Set(m?.group || [])).size) {
+                        throw new NotAssignedError('contest', tid, uid);
+                    }
+                }
+            }
+            const conflicts = await Promise.all(v.members.map(async (uid) =>
+                ((await contest.getStatus(domainId, tid, uid))?.attend
+                    || await contest.getTeamVid(domainId, tid, uid)) ? uid : null));
+            const conflict = conflicts.find((c) => c !== null);
+            if (conflict != null) throw new ContestAlreadyAttendedError(tid, conflict);
+            await contest.attend(domainId, tid, vuid, {
+                subscribe: 1,
+                displayName: v.displayName,
+                members: v.members,
+            });
+        } else {
+            if (this.tdoc.allowTeam && await contest.getTeamVid(domainId, tid, this.user._id)) {
+                throw new ContestAlreadyAttendedError(tid, this.user._id);
+            }
+            await contest.attend(domainId, tid, this.user._id, { subscribe: 1 });
+        }
         this.back();
     }
 
@@ -186,7 +230,7 @@ export class ContestDetailHandler extends ContestDetailBaseHandler {
     @param('subscribe', Types.Boolean)
     async postSubscribe(domainId: string, tid: ObjectId, subscribe = false) {
         if (!this.tsdoc?.attend) throw new ContestNotAttendedError(domainId, tid);
-        await contest.setStatus(domainId, tid, this.user._id, { subscribe: subscribe ? 1 : 0 });
+        await contest.setStatus(domainId, tid, this.team ?? this.user._id, { subscribe: subscribe ? 1 : 0 });
         this.back();
     }
 
@@ -196,7 +240,7 @@ export class ContestDetailHandler extends ContestDetailBaseHandler {
         if (!this.tsdoc?.attend) throw new ContestNotAttendedError(domainId, tid);
         if (!contest.isOngoing(this.tdoc, this.tsdoc)) throw new ContestNotLiveError(domainId, tid);
         const now = new Date();
-        await contest.setStatus(domainId, tid, this.user._id, { endAt: now, ...(!this.tsdoc.startAt ? { startAt: now } : {}) });
+        await contest.setStatus(domainId, tid, this.team ?? this.user._id, { endAt: now, ...(!this.tsdoc.startAt ? { startAt: now } : {}) });
         this.back();
     }
 }
@@ -298,7 +342,7 @@ export class ContestProblemListHandler extends ContestDetailBaseHandler {
         const [pdict, udict, tcdocs] = await Promise.all([
             problem.getList(domainId, this.tdoc.pids, true, true, problem.PROJECTION_CONTEST_LIST),
             user.getList(domainId, [this.tdoc.owner, this.user._id]),
-            contest.getMultiClarification(domainId, tid, this.user._id),
+            contest.getMultiClarification(domainId, tid, this.tsdoc?.members?.length ? this.tsdoc.members : this.user._id),
         ]);
         this.response.body = {
             pdict, psdict: {}, udict, rdict: {}, tdoc: this.tdoc, tcdocs,
@@ -307,7 +351,7 @@ export class ContestProblemListHandler extends ContestDetailBaseHandler {
         this.response.body.showScore = Object.values(this.tdoc.score || {}).some((i) => i && i !== 100);
         if (!this.tsdoc) return;
         if (this.tsdoc.attend && !this.tsdoc.startAt && contest.isOngoing(this.tdoc)) {
-            await contest.setStatus(domainId, tid, this.user._id, { startAt: new Date() });
+            await contest.setStatus(domainId, tid, this.team ?? this.user._id, { startAt: new Date() });
             this.tsdoc.startAt = new Date();
         }
         this.response.body.tsdoc = this.tsdocAsPublic();
@@ -324,10 +368,12 @@ export class ContestProblemListHandler extends ContestDetailBaseHandler {
             rids.push(...Object.values(correction).map((i) => i.rid));
             this.response.body.correction = correction;
         }
+        const uidFilter = this.team && this.tsdoc?.members?.length
+            ? { $in: this.tsdoc.members } : this.user._id;
         [this.response.body.rdict, this.response.body.rdocs] = canViewRecord
             ? await Promise.all([
                 record.getList(domainId, rids),
-                record.getMulti(domainId, { contest: tid, uid: this.user._id })
+                record.getMulti(domainId, { contest: tid, uid: uidFilter })
                     .sort({ _id: -1 }).toArray(),
             ])
             : [Object.fromEntries(psdocs.map((i) => [i.rid, { _id: i.rid }])), []];
@@ -417,16 +463,18 @@ export class ContestEditHandler extends Handler {
     @param('allowViewCode', Types.Boolean)
     @param('allowPrint', Types.Boolean)
     @param('keepScoreboardHidden', Types.Boolean)
+    @param('allowTeam', Types.Boolean)
     @param('langs', Types.CommaSeperatedArray, true)
     async postUpdate(
         domainId: string, tid: ObjectId, beginAtDate: string, beginAtTime: string, duration: number,
         title: string, content: string, rule: string, _pids: string, rated = false,
         _code = '', autoHide = false, assign: string[] = [], lock: number = null,
         contestDuration: number = null, maintainer: number[] = [], allowViewCode = false, allowPrint = false,
-        keepScoreboardHidden = false, langs: string[] = [],
+        keepScoreboardHidden = false, allowTeam = false, langs: string[] = [],
     ) {
         if (!Object.keys(contest.RULES).includes(rule) || contest.RULES[rule].hidden) throw new ValidationError('rule');
         if (autoHide) this.checkPerm(PERM.PERM_EDIT_PROBLEM);
+        allowTeam ||= !!this.tdoc?.allowTeam;
         const pids = _pids.replace(/，/g, ',').split(',').map((i) => +i).filter((i) => i);
         const beginAtMoment = moment.tz(`${beginAtDate} ${beginAtTime}`, this.user.timeZone);
         if (!beginAtMoment.isValid()) throw new ValidationError('beginAtDate', 'beginAtTime');
@@ -465,7 +513,7 @@ export class ContestEditHandler extends Handler {
             });
         }
         await contest.edit(domainId, tid, {
-            assign, _code, autoHide, lockAt, maintainer, allowViewCode, allowPrint, keepScoreboardHidden, langs,
+            assign, _code, autoHide, lockAt, maintainer, allowViewCode, allowPrint, keepScoreboardHidden, allowTeam, langs,
         });
         this.response.body = { tid };
         this.response.redirect = this.url('contest_detail', { tid });
@@ -665,7 +713,7 @@ class ContestClarificationHandler extends ContestManagementBaseHandler {
             ]);
         } else {
             const tsdocs = await contest.getMultiStatus(domainId, { docId: tid, subscribe: 1 }).toArray();
-            const uids = Array.from<number>(new Set(tsdocs.map((tsdoc) => tsdoc.uid)));
+            const uids = Array.from<number>(new Set(tsdocs.flatMap((tsdoc) => (tsdoc.members?.length ? tsdoc.members : [tsdoc.uid]))));
             const flag = contest.isOngoing(this.tdoc) ? message.FLAG_ALERT : message.FLAG_UNREAD;
             await Promise.all([
                 contest.addClarification(domainId, tid, 0, content, this.request.ip, subject),
@@ -692,7 +740,7 @@ export class ContestFileDownloadHandler extends ContestDetailBaseHandler {
         if (type === 'private' && !this.user.own(this.tdoc) && !this.user.hasPerm(PERM.PERM_EDIT_CONTEST)) {
             if (!this.tsdoc?.attend) throw new ContestNotAttendedError(domainId, tid);
             if (!contest.isOngoing(this.tdoc) && !contest.isDone(this.tdoc)) throw new ContestNotLiveError(domainId, tid);
-            if (!this.tsdoc.startAt) await contest.setStatus(domainId, tid, this.user._id, { startAt: new Date() });
+            if (!this.tsdoc.startAt) await contest.setStatus(domainId, tid, this.team ?? this.user._id, { startAt: new Date() });
         }
         this.response.addHeader('Cache-Control', 'public');
         const target = `contest/${domainId}/${tid}/${type}/${filename}`;
@@ -711,7 +759,7 @@ export class ContestUserHandler extends ContestManagementBaseHandler {
     @param('tid', Types.ObjectId)
     async get(domainId: string, tid: ObjectId) {
         const tsdocs = await contest.getMultiStatus(domainId, { docId: tid }).project({
-            uid: 1, attend: 1, startAt: 1, unrank: 1, endAt: 1,
+            uid: 1, attend: 1, startAt: 1, unrank: 1, endAt: 1, displayName: 1, members: 1,
         }).toArray();
         for (const tsdoc of tsdocs) {
             if (this.tdoc.duration && tsdoc.startAt) {
@@ -722,8 +770,9 @@ export class ContestUserHandler extends ContestManagementBaseHandler {
                 ]).toDate();
             }
         }
+        const memberUids = tsdocs.flatMap((tsdoc) => tsdoc.members || []);
         const udict = await user.getListForRender(
-            domainId, [this.tdoc.owner, ...tsdocs.map((i) => i.uid)],
+            domainId, [this.tdoc.owner, ...tsdocs.map((i) => i.uid), ...memberUids],
             this.user.hasPerm(PERM.PERM_VIEW_USER_PRIVATE_INFO),
         );
         this.response.body = { tdoc: this.tdoc, tsdocs, udict };
@@ -931,9 +980,105 @@ declare module 'cordis' {
     }
 }
 
+class ContestTeamHandler extends Handler {
+    async prepare() {
+        this.checkPriv(PRIV.PRIV_USER_PROFILE);
+    }
+
+    async get({ domainId }) {
+        const [mine, invites] = await Promise.all([
+            user.getVusersByMember(this.user._id),
+            user.getVusersByInvite(this.user._id),
+        ]);
+        const udict = await user.getList(domainId, mine.flatMap((t) => [...t.members, ...(t.invite || [])]));
+        this.response.template = 'contest_team.html';
+        this.response.body = { mine, invites, udict, page_name: 'contest_team' };
+    }
+
+    private async mustMember(vuid: number) {
+        const v = await user.getVuserById(vuid);
+        if (!v?.members?.includes(this.user._id)) throw new PermissionError(PERM.PERM_ATTEND_CONTEST);
+        return v;
+    }
+
+    @param('name', Types.String)
+    async postCreate(domainId: string, name: string) {
+        const displayName = name.trim();
+        if (!displayName) throw new ValidationError('name');
+        await user.createVuser(`team:${this.user._id}:${randomstring(6)}`, {
+            displayName,
+            members: [this.user._id],
+        });
+        this.back();
+    }
+
+    @param('vuid', Types.Int)
+    @param('name', Types.String)
+    async postRename(domainId: string, vuid: number, name: string) {
+        await this.mustMember(vuid);
+        const displayName = name.trim();
+        if (!displayName) throw new ValidationError('name');
+        await user.updateVuserById(vuid, { $set: { displayName } });
+        this.back();
+    }
+
+    @param('vuid', Types.Int)
+    @param('uid', Types.Int)
+    async postInvite(domainId: string, vuid: number, uid: number) {
+        await this.limitRate('contest_team_invite', 3600, 20);
+        if (uid <= 0 || !await user.getById(domainId, uid)) throw new ValidationError('uid');
+        const v = await this.mustMember(vuid);
+        if (v.members.includes(uid) || v.invite?.includes(uid)) throw new ValidationError('uid');
+        const teamMembersLimit = this.ctx.setting.get('limit.team_members');
+        if (v.members.length + (v.invite?.length || 0) >= teamMembersLimit) {
+            throw new TeamMemberLimitError(teamMembersLimit);
+        }
+        await user.updateVuserById(vuid, { $addToSet: { invite: uid } });
+        await message.send(this.user._id, uid,
+            `${this.user.uname} invites you to join team "${v.displayName}": ${this.url('contest_team')}`,
+            message.FLAG_RICHTEXT);
+        this.back();
+    }
+
+    @param('vuid', Types.Int)
+    async postAccept(domainId: string, vuid: number) {
+        const v = await user.getVuserById(vuid);
+        if (!v?.invite?.includes(this.user._id)) throw new ValidationError('vuid');
+        const teamMembersLimit = this.ctx.setting.get('limit.team_members');
+        if (v.members.length >= teamMembersLimit) throw new TeamMemberLimitError(teamMembersLimit);
+        await user.updateVuserById(vuid, { $pull: { invite: this.user._id }, $addToSet: { members: this.user._id } });
+        this.back();
+    }
+
+    @param('vuid', Types.Int)
+    async postReject(domainId: string, vuid: number) {
+        const v = await user.getVuserById(vuid);
+        if (!v?.invite?.includes(this.user._id)) throw new ValidationError('vuid');
+        await user.updateVuserById(vuid, { $pull: { invite: this.user._id } });
+        this.back();
+    }
+
+    @param('vuid', Types.Int)
+    @param('uid', Types.Int, true)
+    async postLeave(domainId: string, vuid: number, uid?: number) {
+        const target = uid ?? this.user._id;
+        if (target === this.user._id) {
+            const v = await user.getVuserById(vuid);
+            if (!v?.members?.includes(this.user._id) && !v?.invite?.includes(this.user._id)) {
+                throw new PermissionError(PERM.PERM_ATTEND_CONTEST);
+            }
+        } else {
+            await this.mustMember(vuid);
+        }
+        await user.updateVuserById(vuid, { $pull: { members: target, invite: target } });
+        this.back();
+    }
+}
+
 export async function apply(ctx: Context) {
     ctx.Route('contest_create', '/contest/create', ContestEditHandler);
     ctx.Route('contest_main', '/contest', ContestListHandler, PERM.PERM_VIEW_CONTEST);
+    ctx.Route('contest_team', '/contest/team', ContestTeamHandler); // before /contest/:tid: "team" is not a valid ObjectId
     ctx.Route('contest_detail', '/contest/:tid', ContestDetailHandler, PERM.PERM_VIEW_CONTEST);
     ctx.Route('contest_problemlist', '/contest/:tid/problems', ContestProblemListHandler, PERM.PERM_VIEW_CONTEST);
     ctx.Route('contest_edit', '/contest/:tid/edit', ContestEditHandler, PERM.PERM_VIEW_CONTEST);
@@ -1030,8 +1175,8 @@ export async function apply(ctx: Context) {
                     teams.map((i, idx) => {
                         const showName = this.user.hasPerm(PERM.PERM_VIEW_USER_PRIVATE_INFO) && udict[i.uid].displayName
                             ? udict[i.uid].displayName : udict[i.uid].uname;
-                        const teamName = `${i.rank ? '*' : ''}${escape(udict[i.uid].school || unknownSchool)}-${escape(showName)}`;
-                        return `@t ${idx + 1},0,1,"${teamName}"`;
+                        const displayName = `${i.rank ? '*' : ''}${escape(udict[i.uid].school || unknownSchool)}-${escape(showName)}`;
+                        return `@t ${idx + 1},0,1,"${displayName}"`;
                     }),
                     submissions,
                 );

packages/hydrooj/src/handler/judge.ts

@@ -122,8 +122,10 @@ export class JudgeResultCallbackContext {
         if (rdoc.contest?.toString().startsWith('0'.repeat(23))) return;
         const accept = rdoc.status === builtin.STATUS.STATUS_ACCEPTED;
         const updated = await problem.updateStatus(rdoc.domainId, rdoc.pid, rdoc.uid, rdoc._id, rdoc.status, rdoc.score);
-        if (rdoc.contest) await contest.updateStatus(rdoc.domainId, rdoc.contest, rdoc.uid, rdoc._id, rdoc.pid, rdoc);
-        else if (accept && updated) await domain.incUserInDomain(rdoc.domainId, rdoc.uid, 'nAccept', 1);
+        if (rdoc.contest) {
+            const teamVid = await contest.getTeamVid(rdoc.domainId, rdoc.contest, rdoc.uid);
+            await contest.updateStatus(rdoc.domainId, rdoc.contest, teamVid ?? rdoc.uid, rdoc._id, rdoc.pid, rdoc);
+        } else if (accept && updated) await domain.incUserInDomain(rdoc.domainId, rdoc.uid, 'nAccept', 1);
         const isNormalSubmission = ![
             STATUS.STATUS_ETC, STATUS.STATUS_HACK_SUCCESSFUL, STATUS.STATUS_HACK_UNSUCCESSFUL,
             STATUS.STATUS_FORMAT_ERROR, STATUS.STATUS_SYSTEM_ERROR, STATUS.STATUS_CANCELED,

packages/hydrooj/src/handler/problem.ts

@@ -534,7 +534,7 @@ export class ProblemSubmitHandler extends ProblemDetailHandler {
             await Promise.all([
                 problem.inc(domainId, this.pdoc.docId, 'nSubmit', 1),
                 domain.incUserInDomain(domainId, this.user._id, 'nSubmit'),
-                tid && contest.updateStatus(domainId, tid, this.user._id, rid, this.pdoc.docId),
+                tid && contest.updateStatus(domainId, tid, this.team ?? this.user._id, rid, this.pdoc.docId),
             ]);
         }
         if (tid && !pretest && !contest.canShowSelfRecord.call(this, this.tdoc)) {
@@ -561,8 +561,13 @@ export class ProblemHackHandler extends ProblemDetailHandler {
             if (this.tdoc.rule !== 'codeforces') throw new HackFailedError('This contest is not hackable.');
             if (!contest.isOngoing(this.tdoc, this.tsdoc)) throw new ContestNotLiveError(this.tdoc.docId);
         }
-        if (this.rdoc.uid === this.user._id) throw new HackFailedError('You cannot hack your own submission');
-        if (this.psdoc?.status !== STATUS.STATUS_ACCEPTED) throw new HackFailedError('You must accept this problem before hacking.');
+        if (this.rdoc.uid === this.user._id
+            || (tid && await contest.isSameTeam(domainId, tid, this.rdoc.uid, this.user._id))) {
+            throw new HackFailedError('You cannot hack your own submission');
+        }
+        const accepted = this.psdoc?.status === STATUS.STATUS_ACCEPTED
+            || this.tsdoc?.detail?.[this.pdoc.docId]?.status === STATUS.STATUS_ACCEPTED;
+        if (!accepted) throw new HackFailedError('You must accept this problem before hacking.');
         if (this.rdoc.status !== STATUS.STATUS_ACCEPTED) throw new HackFailedError('You cannot hack a unsuccessful submission.');
     }
 

packages/hydrooj/src/handler/record.ts

@@ -7,7 +7,7 @@ import {
     PermissionError, PretestRejudgeFailedError, ProblemConfigError,
     ProblemNotFoundError, RecordNotFoundError, UserNotFoundError,
 } from '../error';
-import { RecordDoc, Tdoc } from '../interface';
+import { ContestStatusDoc, RecordDoc, Tdoc } from '../interface';
 import { PERM, PRIV, STATUS } from '../model/builtin';
 import * as contest from '../model/contest';
 import problem, { ProblemDoc } from '../model/problem';
@@ -53,16 +53,23 @@ export class RecordListHandler extends ContestDetailBaseHandler {
             if (udoc) q.uid = udoc._id;
             else invalid = true;
         }
-        if (q.uid !== this.user._id) this.checkPerm(PERM.PERM_VIEW_RECORD);
+        // Team: a member viewing the contest record list sees the whole team's submissions.
+        let teamMembers: number[] | null = null;
+        if (tid && this.team && (q.uid === undefined || q.uid === this.user._id)) {
+            // this.tsdoc is already the team vuser's tsdoc (swapped in __prepare); no extra DB fetch needed
+            teamMembers = this.tsdoc?.members?.length ? this.tsdoc.members : null;
+        }
+        if (q.uid !== this.user._id && !teamMembers) this.checkPerm(PERM.PERM_VIEW_RECORD);
         if (tid) {
             tdoc = await contest.get(domainId, tid);
             this.tdoc = tdoc;
             if (!tdoc) throw new ContestNotFoundError(domainId, pid);
             if (!contest.canShowScoreboard.call(this, tdoc, true)) throw new PermissionError(PERM.PERM_VIEW_CONTEST_HIDDEN_SCOREBOARD);
-            if (!contest[q.uid === this.user._id ? 'canShowSelfRecord' : 'canShowRecord'].call(this, tdoc, true)) {
+            const viewingSelf = q.uid === this.user._id || !!teamMembers;
+            if (!contest[viewingSelf ? 'canShowSelfRecord' : 'canShowRecord'].call(this, tdoc, true)) {
                 throw new PermissionError(PERM.PERM_VIEW_CONTEST_HIDDEN_SCOREBOARD);
             }
-            if (!(await contest.getStatus(domainId, tid, this.user._id))?.attend) {
+            if (!this.team && !(await contest.getStatus(domainId, tid, this.user._id))?.attend) {
                 const name = tdoc.rule === 'homework'
                     ? "You haven't claimed this homework yet."
                     : "You haven't attended this contest yet.";
@@ -89,6 +96,7 @@ export class RecordListHandler extends ContestDetailBaseHandler {
             delete q.contest;
             q._id = { $gt: Time.getObjectID(new Date(Date.now() - 10 * Time.week)) };
         }
+        if (teamMembers && !all && !allDomain) q.uid = { $in: teamMembers };
         let cursor = record.getMulti(allDomain ? '' : domainId, q).sort('_id', -1);
         if (!full) cursor = cursor.project(buildProjection(record.PROJECTION_LIST));
         const limit = full ? 10 : system.get('pagination.record');
@@ -136,7 +144,7 @@ export class RecordDetailHandler extends ContestDetailBaseHandler {
     async prepare(domainId: string, rid: ObjectId) {
         this.rdoc = await record.get(domainId, rid);
         if (!this.rdoc) throw new RecordNotFoundError(rid);
-        if (this.rdoc.uid !== this.user._id) this.checkPerm(PERM.PERM_VIEW_RECORD);
+        if (!(await contest.isOwnOrTeammateRecord(domainId, this.rdoc, this.user._id))) this.checkPerm(PERM.PERM_VIEW_RECORD);
     }
 
     async download() {
@@ -164,6 +172,7 @@ export class RecordDetailHandler extends ContestDetailBaseHandler {
         if (rev && allRevs[rev.toString()]) {
             rdoc = { ...rdoc, ...omit(await record.collHistory.findOne({ _id: rev }), ['_id']), progress: null };
         }
+        const isOwnOrTeammate = await contest.isOwnOrTeammateRecord(domainId, rdoc, this.user._id);
         let canViewDetail = true;
         if (rdoc.contest?.toString().startsWith('0'.repeat(23))) {
             if (rdoc.uid !== this.user._id) throw new PermissionError(PERM.PERM_READ_RECORD_CODE);
@@ -171,8 +180,8 @@ export class RecordDetailHandler extends ContestDetailBaseHandler {
             this.tdoc = await contest.get(domainId, rdoc.contest);
             let canView = this.user.own(this.tdoc);
             canView ||= contest.canShowRecord.call(this, this.tdoc);
-            canView ||= contest.canShowSelfRecord.call(this, this.tdoc, true) && rdoc.uid === this.user._id;
-            if (!canView && rdoc.uid !== this.user._id) throw new PermissionError(rid);
+            canView ||= contest.canShowSelfRecord.call(this, this.tdoc, true) && isOwnOrTeammate;
+            if (!canView && !isOwnOrTeammate) throw new PermissionError(rid);
             canViewDetail = canView;
             this.args.tid = this.tdoc.docId;
             if (!this.user.own(this.tdoc) && !this.user.hasPerm(PERM.PERM_EDIT_CONTEST)) {
@@ -187,12 +196,13 @@ export class RecordDetailHandler extends ContestDetailBaseHandler {
             user.getById(domainId, rdoc.uid),
         ]);
 
-        let canViewCode = rdoc.uid === this.user._id;
+        let canViewCode = isOwnOrTeammate;
         canViewCode ||= this.user.hasPriv(PRIV.PRIV_READ_RECORD_CODE);
         canViewCode ||= this.user.hasPerm(PERM.PERM_READ_RECORD_CODE);
         canViewCode ||= this.user.hasPerm(PERM.PERM_READ_RECORD_CODE_ACCEPT) && self?.status === STATUS.STATUS_ACCEPTED;
         if (this.tdoc) {
-            this.tsdoc = await contest.getStatus(domainId, this.tdoc.docId, this.user._id);
+            const teamVid = this.tdoc.allowTeam ? await contest.getTeamVid(domainId, this.tdoc.docId, this.user._id) : null;
+            this.tsdoc = await contest.getStatus(domainId, this.tdoc.docId, teamVid ?? this.user._id);
             canViewCode ||= this.user.own(this.tdoc);
             if (this.tdoc.allowViewCode && contest.isDone(this.tdoc)) {
                 canViewCode ||= !!this.tsdoc?.attend;
@@ -261,6 +271,7 @@ export class RecordMainConnectionHandler extends ConnectionHandler {
     status: number;
     pretest = false;
     tdoc: Tdoc;
+    teamMembers?: number[];
     applyProjection = false;
     noTemplate = false;
     queue: Map<string, () => Promise<any>> = new Map();
@@ -299,7 +310,18 @@ export class RecordMainConnectionHandler extends ConnectionHandler {
                 else throw new UserNotFoundError(uidOrName);
             }
         }
-        if (this.uid !== this.user._id) this.checkPerm(PERM.PERM_VIEW_RECORD);
+        if (this.tdoc?.allowTeam && !pretest && !all && !allDomain && (this.uid === undefined || this.uid === this.user._id)) {
+            const teamVid = await contest.getTeamVid(domainId, this.tdoc.docId, this.user._id);
+            if (teamVid) {
+                const tsdoc = await contest.getStatus(domainId, this.tdoc.docId, teamVid);
+                this.teamMembers = tsdoc?.members?.length ? tsdoc.members : undefined;
+            }
+        }
+        if (this.uid !== this.user._id && !this.teamMembers) {
+            const sameTeam = this.tdoc?.allowTeam && typeof this.uid === 'number'
+                && await contest.isSameTeam(domainId, this.tdoc.docId, this.uid, this.user._id);
+            if (!sameTeam) this.checkPerm(PERM.PERM_VIEW_RECORD);
+        }
         if (pid) {
             const pdoc = await problem.get(domainId, pid);
             if (pdoc) this.pid = pdoc.docId;
@@ -336,13 +358,16 @@ export class RecordMainConnectionHandler extends ConnectionHandler {
                 if (!rdoc.contest && this.tid) return;
                 if (rdoc.contest && ![this.tid, '000000000000000000000000'].includes(rdoc.contest.toString())) return;
                 if (this.tid && rdoc.contest?.toString() !== '0'.repeat(24)) {
-                    if (rdoc.uid !== this.user._id && !contest.canShowRecord.call(this, this.tdoc, true)) return;
-                    if (rdoc.uid === this.user._id && !contest.canShowSelfRecord.call(this, this.tdoc, true)) return;
+                    const own = await contest.isOwnOrTeammateRecord(this.args.domainId, rdoc, this.user._id);
+                    if (!own && !contest.canShowRecord.call(this, this.tdoc, true)) return;
+                    if (own && !contest.canShowSelfRecord.call(this, this.tdoc, true)) return;
                 }
             }
         }
         if (typeof this.pid === 'number' && rdoc.pid !== this.pid) return;
-        if (typeof this.uid === 'number' && rdoc.uid !== this.uid) return;
+        if (this.teamMembers) {
+            if (!this.teamMembers.includes(rdoc.uid)) return;
+        } else if (typeof this.uid === 'number' && rdoc.uid !== this.uid) return;
 
         let [udoc, pdoc] = await Promise.all([
             user.getById(this.args.domainId, rdoc.uid),
@@ -381,6 +406,7 @@ export class RecordMainConnectionHandler extends ConnectionHandler {
 export class RecordDetailConnectionHandler extends ConnectionHandler {
     pdoc: ProblemDoc;
     tdoc?: Tdoc;
+    tsdoc?: ContestStatusDoc;
     rid: string = '';
     disconnectTimeout: NodeJS.Timeout;
     throttleSend: any;
@@ -393,29 +419,30 @@ export class RecordDetailConnectionHandler extends ConnectionHandler {
     async prepare(domainId: string, rid: ObjectId, noTemplate = false) {
         const rdoc = await record.get(domainId, rid);
         if (!rdoc) return;
+        const isOwnOrTeammate = await contest.isOwnOrTeammateRecord(domainId, rdoc, this.user._id);
         if (rdoc.contest && ![record.RECORD_GENERATE, record.RECORD_PRETEST].some((i) => i.toHexString() === rdoc.contest.toHexString())) {
             this.tdoc = await contest.get(domainId, rdoc.contest);
             let canView = this.user.own(this.tdoc);
             canView ||= contest.canShowRecord.call(this, this.tdoc);
-            canView ||= this.user._id === rdoc.uid && contest.canShowSelfRecord.call(this, this.tdoc);
+            canView ||= isOwnOrTeammate && contest.canShowSelfRecord.call(this, this.tdoc);
             if (!canView) throw new PermissionError(PERM.PERM_VIEW_CONTEST_HIDDEN_SCOREBOARD);
             if (!this.user.own(this.tdoc) && !this.user.hasPerm(PERM.PERM_EDIT_CONTEST)) {
                 this.applyProjection = true;
             }
+            const teamVid = this.tdoc.allowTeam ? await contest.getTeamVid(domainId, this.tdoc.docId, this.user._id) : null;
+            this.tsdoc = await contest.getStatus(domainId, this.tdoc.docId, teamVid ?? this.user._id);
         }
         const [pdoc, self] = await Promise.all([
             problem.get(rdoc.domainId, rdoc.pid),
             problem.getStatus(domainId, rdoc.pid, this.user._id),
         ]);
 
-        this.canViewCode = rdoc.uid === this.user._id;
+        this.canViewCode = isOwnOrTeammate;
         this.canViewCode ||= this.user.hasPriv(PRIV.PRIV_READ_RECORD_CODE);
         this.canViewCode ||= this.user.hasPerm(PERM.PERM_READ_RECORD_CODE);
         this.canViewCode ||= this.user.hasPerm(PERM.PERM_READ_RECORD_CODE_ACCEPT) && self?.status === STATUS.STATUS_ACCEPTED;
 
-        if (!rdoc.contest || this.user._id !== rdoc.uid) {
-            if (!problem.canViewBy(pdoc, this.user)) throw new PermissionError(PERM.PERM_VIEW_PROBLEM_HIDDEN);
-        }
+        if (!this.tsdoc?.attend && pdoc && !problem.canViewBy(pdoc, this.user)) throw new PermissionError(PERM.PERM_VIEW_PROBLEM_HIDDEN);
 
         this.pdoc = pdoc;
         this.noTemplate = noTemplate;

packages/hydrooj/src/interface.ts

@@ -38,6 +38,7 @@ export interface SystemKeys {
     'server.port': number;
     'server.language': string;
     'limit.problem_files_max': number;
+    'limit.team_members': number;
     'problem.categories': string;
     'session.keys': string[];
     'session.saved_expire_seconds': number;
@@ -92,7 +93,7 @@ export interface Udoc extends Record<string, any> {
     loginip: string;
 }
 
-export interface VUdoc {
+export interface VUdoc extends Record<string, any> {
     _id: number;
     mail: string;
     mailLower: string;
@@ -106,6 +107,11 @@ export interface VUdoc {
     loginat: Date;
     ip: ['127.0.0.1'];
     loginip: '127.0.0.1';
+
+    // for contest team
+    displayName?: string;
+    members?: number[];
+    invite?: number[];
 }
 
 export interface GDoc {
@@ -277,6 +283,7 @@ export interface Tdoc extends Document {
     balloon?: Record<number, string | { color: string, name: string }>;
     score?: Record<number, number>;
     langs?: string[];
+    allowTeam?: boolean;
 
     /**
      * In hours
@@ -464,6 +471,8 @@ export interface ContestStatusDoc extends StatusDocBase, ContestStat {
     startAt?: Date;
     endAt?: Date; // 灵活时间模式的结束时间，或者是提前结束比赛的时间
     rev?: number;
+    displayName?: string;
+    members?: number[];
 }
 
 export interface TrainingStatusDoc extends StatusDocBase, Record<string, any> {

packages/hydrooj/src/model/contest.ts

@@ -85,6 +85,23 @@ export function isExtended(tdoc: Tdoc) {
     return tdoc.penaltySince.getTime() <= now && now < tdoc.endAt.getTime();
 }
 
+async function getScoreboardUdict(
+    tdoc: Tdoc, rankedTsdocs: [number, ContestStatusDoc][], uids: number[], showDisplayName: boolean,
+) {
+    const memberUids = tdoc.allowTeam
+        ? rankedTsdocs.flatMap(([, tsdoc]) => tsdoc.members || [])
+        : [];
+    const udict = await UserModel.getListForRender(tdoc.domainId, [...uids, ...memberUids], showDisplayName ? ['displayName'] : []);
+    if (tdoc.allowTeam) {
+        for (const [, tsdoc] of rankedTsdocs) {
+            if (tsdoc.members?.length && udict[tsdoc.uid]) {
+                (udict[tsdoc.uid] as any).teamMembers = tsdoc.members.filter((uid) => udict[uid]);
+            }
+        }
+    }
+    return udict;
+}
+
 export function buildContestRule<T>(def: Optional<ContestRule<T>, 'applyProjection'>): ContestRule<T>;
 export function buildContestRule<T>(def: Partial<ContestRule<T>>, baseRule: ContestRule<T>): ContestRule<T>;
 export function buildContestRule<T>(def: Partial<ContestRule<T>>, baseRule: ContestRule<T> = {} as any) {
@@ -240,7 +257,7 @@ const acm = buildContestRule({
     async scoreboard(config, _, tdoc, pdict, cursor) {
         const rankedTsdocs = await db.ranked(cursor, (a, b) => (a.score || 0) === (b.score || 0) && (a.time || 0) === (b.time || 0));
         const uids = rankedTsdocs.map(([, tsdoc]) => tsdoc.uid);
-        const udict = await UserModel.getListForRender(tdoc.domainId, uids, config.showDisplayName ? ['displayName'] : []);
+        const udict = await getScoreboardUdict(tdoc, rankedTsdocs, uids, config.showDisplayName);
         // Find first accept
         const first = {};
         const data = await document.collStatus.aggregate([
@@ -415,7 +432,7 @@ const oi = buildContestRule({
     async scoreboard(config, _, tdoc, pdict, cursor) {
         const rankedTsdocs = await db.ranked(cursor, (a, b) => (a.score || 0) === (b.score || 0));
         const uids = rankedTsdocs.map(([, tsdoc]) => tsdoc.uid);
-        const udict = await UserModel.getListForRender(tdoc.domainId, uids, config.showDisplayName ? ['displayName'] : []);
+        const udict = await getScoreboardUdict(tdoc, rankedTsdocs, uids, config.showDisplayName);
         const psdict = {};
         const first = {};
         const useRelativeTime = !!tdoc.duration;
@@ -785,7 +802,7 @@ const homework = buildContestRule({
     async scoreboard(config, _, tdoc, pdict, cursor) {
         const rankedTsdocs = await db.ranked(cursor, (a, b) => a.score === b.score);
         const uids = rankedTsdocs.map(([, tsdoc]) => tsdoc.uid);
-        const udict = await UserModel.getListForRender(tdoc.domainId, uids, config.showDisplayName ? ['displayName'] : []);
+        const udict = await getScoreboardUdict(tdoc, rankedTsdocs, uids, config.showDisplayName);
         const columns = await this.scoreboardHeader(config, _, tdoc, pdict);
         const rows: ScoreboardRow[] = [
             columns,
@@ -903,6 +920,15 @@ export async function getStatus(domainId: string, tid: ObjectId, uid: number) {
     return await document.getStatus(domainId, document.TYPE_CONTEST, tid, uid);
 }
 
+export function getMultiStatus(domainId: string, query: any) {
+    return document.getMultiStatus(domainId, document.TYPE_CONTEST, query);
+}
+
+export async function getTeamVid(domainId: string, tid: ObjectId, uid: number): Promise<number | null> {
+    const s = await getMultiStatus(domainId, { docId: tid, members: uid }).project({ uid: 1 }).limit(1).next();
+    return s?.uid ?? null;
+}
+
 export async function updateStatus(
     domainId: string, tid: ObjectId, uid: number, rid: ObjectId, pid: number,
     {
@@ -924,8 +950,18 @@ export async function updateStatus(
 
 export async function getListStatus(domainId: string, uid: number, tids: ObjectId[]) {
     const r = {};
-    // eslint-disable-next-line no-await-in-loop
-    for (const tid of tids) r[tid.toHexString()] = await getStatus(domainId, tid, uid);
+    for (const tid of tids) {
+        // eslint-disable-next-line no-await-in-loop
+        const tsdoc = await getStatus(domainId, tid, uid);
+        if (tsdoc?.attend) {
+            r[tid.toHexString()] = tsdoc;
+            continue;
+        }
+        // eslint-disable-next-line no-await-in-loop
+        const teamVid = await getTeamVid(domainId, tid, uid);
+        // eslint-disable-next-line no-await-in-loop
+        r[tid.toHexString()] = teamVid ? await getStatus(domainId, tid, teamVid) : tsdoc;
+    }
     return r;
 }
 
@@ -945,10 +981,6 @@ export async function cancelAttend(domainId: string, tid: ObjectId, uid: number)
     return {};
 }
 
-export function getMultiStatus(domainId: string, query: any) {
-    return document.getMultiStatus(domainId, document.TYPE_CONTEST, query);
-}
-
 export function setStatus(domainId: string, tid: ObjectId, uid: number, $set?: any, $unset?: any) {
     return document.setStatus(domainId, document.TYPE_CONTEST, tid, uid, $set, $unset);
 }
@@ -1003,6 +1035,19 @@ export async function unlockScoreboard(domainId: string, tid: ObjectId) {
     await recalcStatus(domainId, tid);
 }
 
+export async function isSameTeam(domainId: string, tid: ObjectId, a: number, b: number): Promise<boolean> {
+    if (a === b) return true;
+    const [va, vb] = await Promise.all([getTeamVid(domainId, tid, a), getTeamVid(domainId, tid, b)]);
+    return !!va && va === vb;
+}
+
+export async function isOwnOrTeammateRecord(domainId: string, rdoc: RecordDoc, uid: number): Promise<boolean> {
+    if (rdoc.uid === uid) return true;
+    if (!rdoc.contest) return false;
+    if (RecordModel.RECORD_PRETEST.equals(rdoc.contest) || RecordModel.RECORD_GENERATE.equals(rdoc.contest)) return false;
+    return isSameTeam(domainId, rdoc.contest, rdoc.uid, uid);
+}
+
 export function canViewHiddenScoreboard(this: { user: User }, tdoc: Tdoc) {
     if (this.user.own(tdoc)) return true;
     if (tdoc.rule === 'homework') return this.user.hasPerm(PERM.PERM_VIEW_HOMEWORK_HIDDEN_SCOREBOARD);
@@ -1066,10 +1111,13 @@ export function getClarification(domainId: string, did: ObjectId) {
     return document.get(domainId, document.TYPE_CONTEST_CLARIFICATION, did);
 }
 
-export function getMultiClarification(domainId: string, tid: ObjectId, owner?: number) {
+export function getMultiClarification(domainId: string, tid: ObjectId, owner?: number | number[]) {
+    const ownerFilter = owner === undefined
+        ? {}
+        : { owner: { $in: [0, ...(Array.isArray(owner) ? owner : [owner])] } };
     return document.getMulti(
         domainId, document.TYPE_CONTEST_CLARIFICATION,
-        { parentType: document.TYPE_CONTEST, parentId: tid, ...(typeof owner === 'number' ? { owner: { $in: [owner, 0] } } : {}) },
+        { parentType: document.TYPE_CONTEST, parentId: tid, ...ownerFilter },
     ).sort('_id', -1).toArray();
 }
 
@@ -1124,7 +1172,7 @@ export async function apply(ctx: Context) {
         if (!bdoc.first) return;
         (async () => {
             const tsdocs = await getMultiStatus(domainId, { docId: tid, subscribe: 1 }).toArray();
-            const uids = Array.from<number>(new Set(tsdocs.map((tsdoc) => tsdoc.uid)));
+            const uids = Array.from<number>(new Set(tsdocs.flatMap((tsdoc) => (tsdoc.members?.length ? tsdoc.members : [tsdoc.uid]))));
             const [team, tdoc, pdoc] = await Promise.all([
                 UserModel.getById(domainId, bdoc.uid),
                 get(domainId, tid),
@@ -1153,6 +1201,9 @@ global.Hydro.model.contest = {
     add,
     getListStatus,
     getMultiStatus,
+    getTeamVid,
+    isSameTeam,
+    isOwnOrTeammateRecord,
     attend,
     cancelAttend,
     edit,

packages/hydrooj/src/model/document.ts

@@ -449,6 +449,7 @@ export async function apply(ctx: Context) {
         { key: { domainId: 1, docType: 1, docId: 1, status: 1, rid: 1, rp: 1 }, name: 'rp', sparse: true },
         { key: { domainId: 1, docType: 1, docId: 1, score: -1 }, name: 'contestRuleOI', sparse: true },
         { key: { domainId: 1, docType: 1, docId: 1, accept: -1, time: 1 }, name: 'contestRuleACM', sparse: true },
+        { key: { domainId: 1, docType: 1, docId: 1, members: 1 }, name: 'contestTeam', partialFilterExpression: { members: { $exists: true } } },
         { key: { domainId: 1, docType: 1, uid: 1, enroll: 1, docId: 1 }, name: 'training', sparse: true },
     );
 }

packages/hydrooj/src/model/setting.ts

@@ -345,6 +345,7 @@ SystemSetting(
     Setting('setting_limits', 'limit.user_files_size', 128 * 1024 * 1024, 'number', 'limit.user_files_size', 'Max total file size for user'),
     Setting('setting_limits', 'limit.contest_files', 100, 'number', 'limit.contest_files', 'Max files for contest or training'),
     Setting('setting_limits', 'limit.contest_files_size', 128 * 1024 * 1024, 'number', 'limit.contest_files_size', 'Max total file size for contest or training'),
+    Setting('setting_limits', 'limit.team_members', 5, 'number', 'limit.team_members', 'Max members per contest team'),
     Setting('setting_limits', 'limit.submission', 60, 'number', 'limit.submission', 'Max submission count per minute'),
     Setting('setting_limits', 'limit.submission_user', 15, 'number', 'limit.submission_user', 'Max submission count per user per minute'),
     Setting('setting_limits', 'limit.pretest', 60, 'number', 'limit.pretest', 'Max pretest count per minute'),

packages/hydrooj/src/model/user.ts

@@ -379,28 +379,63 @@ class UserModel {
 
     @ArgMethod
     static async ensureVuser(uname: string) {
-        const [[min], current] = await Promise.all([
-            collV.find({}).sort({ _id: 1 }).limit(1).toArray(),
-            collV.findOne({ unameLower: uname.toLowerCase() }),
-        ]);
+        const current = await collV.findOne({ unameLower: uname.trim().toLowerCase() });
         if (current) return current._id;
-        const uid = min?._id ? min._id - 1 : -1000;
-        await collV.insertOne({
-            _id: uid,
-            mail: `${-uid}@vuser.local`,
-            mailLower: `${-uid}@vuser.local`,
-            uname,
-            unameLower: uname.trim().toLowerCase(),
-            hash: '',
-            salt: '',
-            hashType: 'hydro',
-            regat: new Date(),
-            ip: ['127.0.0.1'],
-            loginat: new Date(),
-            loginip: '127.0.0.1',
-            priv: 0,
-        });
-        return uid;
+        return UserModel.createVuser(uname);
+    }
+
+    @ArgMethod
+    static async createVuser(uname: string, extra: Record<string, any> = {}) {
+        const [min] = await collV.find({}).sort({ _id: 1 }).limit(1).toArray();
+        let uid = min?._id ? min._id - 1 : -1000;
+        while (true) {
+            try {
+                // eslint-disable-next-line no-await-in-loop
+                await collV.insertOne({
+                    ...extra,
+                    _id: uid,
+                    mail: `${-uid}@vuser.local`,
+                    mailLower: `${-uid}@vuser.local`,
+                    uname: uname.trim(),
+                    unameLower: uname.trim().toLowerCase(),
+                    hash: '',
+                    salt: '',
+                    hashType: 'hydro',
+                    regat: new Date(),
+                    ip: ['127.0.0.1'],
+                    loginat: new Date(),
+                    loginip: '127.0.0.1',
+                    priv: 0,
+                });
+                return uid;
+            } catch (e) {
+                // Duplicate _id from a concurrent createVuser/ensureVuser: pick the next slot.
+                if (e?.code === 11000 && JSON.stringify(e.keyPattern) === '{"_id":1}') {
+                    uid -= 1;
+                    continue;
+                }
+                throw e;
+            }
+        }
+    }
+
+    static getVuserById(uid: number) {
+        return collV.findOne({ _id: uid });
+    }
+
+    static getVusersByMember(uid: number, projection?: Partial<Record<keyof VUdoc, 0 | 1>>) {
+        const cursor = collV.find({ members: uid });
+        return projection ? cursor.project<VUdoc>(projection).toArray() : cursor.toArray();
+    }
+
+    static getVusersByInvite(uid: number) {
+        return collV.find({ invite: uid }).toArray();
+    }
+
+    static async updateVuserById(uid: number, update: any) {
+        const vdoc = await collV.findOneAndUpdate({ _id: uid }, update, { returnDocument: 'after' });
+        deleteUserCache(vdoc);
+        return vdoc;
     }
 
     static getMulti(params: Filter<Udoc> = {}, projection?: (keyof Udoc)[]) {