feat(be): implement contest participant standings

backend/apps/client/src/contest/contest.service.spec.ts

@@ -183,10 +183,37 @@ const record: ContestRecord = {
   contestId,
   userId,
   acceptedProblemNum: 0,
+  score: 0,
   totalPenalty: 0,
   createTime: new Date(),
   updateTime: new Date()
 }
+const sortedContestRecordsWithUserDetail = [
+  {
+    user: {
+      id: 13,
+      username: 'user10'
+    },
+    score: 36,
+    totalPenalty: 720
+  },
+  {
+    user: {
+      id: 12,
+      username: 'user09'
+    },
+    score: 33,
+    totalPenalty: 660
+  },
+  {
+    user: {
+      id: 11,
+      username: 'user08'
+    },
+    score: 30,
+    totalPenalty: 600
+  }
+]
 
 const mockPrismaService = {
   contest: {
@@ -330,10 +357,17 @@ describe('ContestService', () => {
 
     it('should return contest', async () => {
       mockPrismaService.contest.findUniqueOrThrow.resolves(contestDetail)
-
-      expect(await service.getContest(groupId, contestId)).to.deep.equal(
-        contestDetail
+      mockPrismaService.contestRecord.findMany.resolves(
+        sortedContestRecordsWithUserDetail
       )
+
+      expect(await service.getContest(groupId, contestId)).to.deep.equal({
+        ...contestDetail,
+        standings: sortedContestRecordsWithUserDetail.map((record, index) => ({
+          ...record,
+          standing: index + 1
+        }))
+      })
     })
   })
 

backend/apps/client/src/contest/contest.service.ts

@@ -214,10 +214,7 @@ export class ContestService {
     return upcomingContest
   }
 
-  async getContest(
-    id: number,
-    groupId = OPEN_SPACE_ID
-  ): Promise<Partial<Contest>> {
+  async getContest(id: number, groupId = OPEN_SPACE_ID) {
     const contest = await this.prisma.contest.findUniqueOrThrow({
       where: {
         id,
@@ -232,8 +229,43 @@ export class ContestService {
         description: true
       }
     })
+    // get contest participants ranking using ContestRecord
+    const sortedContestRecordsWithUserDetail =
+      await this.prisma.contestRecord.findMany({
+        where: {
+          contestId: id
+        },
+        select: {
+          user: {
+            select: {
+              id: true,
+              username: true
+            }
+          },
+          score: true,
+          totalPenalty: true
+        },
+        orderBy: [
+          {
+            score: 'desc'
+          },
+          {
+            totalPenalty: 'asc'
+          }
+        ]
+      })
 
-    return contest
+    const UsersWithStandingDetail = sortedContestRecordsWithUserDetail.map(
+      (contestRecord, index) => ({
+        ...contestRecord,
+        standing: index + 1
+      })
+    )
+    // combine contest and sortedContestRecordsWithUserDetail
+    return {
+      ...contest,
+      standings: UsersWithStandingDetail
+    }
   }
 
   async createContestRecord(

backend/prisma/migrations/20240124143020_add_score_field_in_contest_record/migration.sql

@@ -0,0 +1,2 @@
+-- AlterTable
+ALTER TABLE "contest_record" ADD COLUMN     "score" INTEGER NOT NULL DEFAULT 0;

backend/prisma/schema.prisma

@@ -295,6 +295,7 @@ model ContestRecord {
   user               User?    @relation(fields: [userId], references: [id], onDelete: SetNull)
   userId             Int?     @map("user_id")
   acceptedProblemNum Int      @default(0) @map("accepted_problem_num")
+  score              Int      @default(0)
   totalPenalty       Int      @default(0) @map("total_penalty")
   createTime         DateTime @default(now()) @map("create_time")
   updateTime         DateTime @updatedAt @map("update_time")

backend/prisma/seed.ts

@@ -1,4 +1,4 @@
 import {
   PrismaClient,
   Role,
   Level,
@@ -13,7 +13,8 @@
   type Submission,
   type ProblemTestcase,
   type Announcement,
-  type CodeDraft
+  type CodeDraft,
+  ContestRecord
 } from '@prisma/client'
 import { hash } from 'argon2'
 import { readFile } from 'fs/promises'
@@ -1562,6 +1563,35 @@
   return codeDrafts
 }
 
+const createContestRecords = async () => {
+  const contestRecords: ContestRecord[] = []
+  let i = 0
+  // group 1 users
+  const group1Users = await prisma.userGroup.findMany({
+    where: {
+      groupId: 1
+    }
+  })
+  for (const user of group1Users) {
+    const contestRecord = await prisma.contestRecord.create({
+      data: {
+        userId: user.userId,
+        contestId: 1,
+        acceptedProblemNum: user.userId,
+        // TODO: 아직 점수 계산 로직을 구현하지 않아서,
+        // 임시로 임의로 좀수와 페널티를 부여하도록 하였습니다.
+        // 점수 계산 로직을 구현하면 아래의 코드를 수정해주세요.
+        score: i < 3 ? 3 : i * 3,
+        totalPenalty: i * 60
+      }
+    })
+    contestRecords.push(contestRecord)
+    i++
+  }
+
+  return contestRecords
+}
+
 const main = async () => {
   await createUsers()
   await createGroups()
@@ -1572,6 +1602,7 @@
   await createSubmissions()
   await createAnnouncements()
   await createCodeDrafts()
+  await createContestRecords()
 }
 
 main()

collection/client/Contest/Get contest by ID/Succeed.bru

@@ -5,13 +5,13 @@ meta {
 }
 
 get {
-  url: {{baseUrl}}/contest/13
+  url: {{baseUrl}}/contest/1?groupId=1
   body: none
   auth: none
 }
 
 query {
-  ~groupId: 2
+  groupId: 1
 }
 
 assert {
@@ -24,12 +24,26 @@ assert {
   res("group.groupName"): isString
   res("description"): isString
   res("_count.contestRecord"): isNumber
+  res("standings[0].user.id"): isNumber
+  res("standings[0].user.username"): isString
+  res("standings[0].score"): isNumber
+  res("standings[0].totalPenalty"): isNumber
+  res("standings[0].standing"): isNumber
+}
+
+script:pre-request {
+  await require("./login").loginUser(req);
 }
 
 docs {
   # Get Contest by ID
 
-  하나의 대회 정보를 가져옵니다.
+  하나의 대회 정보와 Contest 참여자 정보를 가져옵니다.
+  ## Path
+
+  | 이름 | 타입 | 설명 |
+  |-----|-----|-----|
+  |id|Integer|Contest(대회) ID|
 
   ## Query