filter out duplicate AC submissions

server/src/entities/submission.entity.ts

@@ -1,11 +1,11 @@
-import { Status } from '../const/boj-results';
 import {
   BaseEntity,
   Column,
   Entity,
   ManyToOne,
   PrimaryGeneratedColumn,
 } from 'typeorm';
+import { Status } from '../const/boj-results';
 import Problem from './problem.entity';
 import Room from './room.entity';
 import User from './user.entity';
@@ -37,4 +37,7 @@ export default class Submission extends BaseEntity {
 
   @ManyToOne(() => Problem, (problem) => problem.submissions, { cascade: true })
   problem?: Problem;
+
+  @Column()
+  alreadyAccepted!: boolean;
 }

server/src/room/room.service.ts

@@ -148,15 +148,14 @@ export class RoomService {
       .innerJoin(
         'room.submissions',
         'submission',
-        'submission.status = :status AND submission.user_id = user.id',
+        'submission.status = :status AND submission.user_id = user.id AND submission.alreadyAccepted = false',
         {
           status: Status.ACCEPTED,
         },
       )
-      .innerJoin('submission.problem', 'problem')
       .select('user.id', 'userId')
       .addSelect('user.username', 'username')
-      .addSelect('COUNT(DISTINCT submission.problem)', 'acceptedCount')
+      .addSelect('COUNT(submission.id)', 'acceptedCount')
       .addSelect('MAX(submission.submittedAt)', 'lastAcceptedAt')
       .groupBy('user.id')
       .orderBy('acceptedCount', 'DESC')

server/src/submission/submission.service.ts

@@ -105,13 +105,23 @@ export class SubmissionService {
       status,
     );
 
+    const alreadyAccepted = await this.submissionRepository.exist({
+      where: {
+        user: { id: user.id },
+        problem: { id: problem.id },
+        room: { id: room.id },
+        status: Status.ACCEPTED,
+      },
+    });
+
     return await this.submissionRepository
       .create({
         status,
         user,
         room,
         problem,
         submittedAt,
+        alreadyAccepted,
       })
       .save();
   }