enhance(reversi): improve desync handling

packages/backend/src/core/ReversiService.ts

@@ -5,7 +5,6 @@
 
 import { Inject, Injectable } from '@nestjs/common';
 import * as Redis from 'ioredis';
-import CRC32 from 'crc-32';
 import { ModuleRef } from '@nestjs/core';
 import * as Reversi from 'misskey-reversi';
 import { IsNull } from 'typeorm';
@@ -255,7 +254,13 @@ export class ReversiService implements OnApplicationShutdown, OnModuleInit {
 			bw = parseInt(game.bw, 10);
 		}
 
-		const crc32 = CRC32.str(JSON.stringify(game.logs)).toString();
+		const engine = new Reversi.Game(game.map, {
+			isLlotheo: game.isLlotheo,
+			canPutEverywhere: game.canPutEverywhere,
+			loopedBoard: game.loopedBoard,
+		});
+
+		const crc32 = engine.calcCrc32().toString();
 
 		const updatedGame = await this.reversiGamesRepository.createQueryBuilder().update()
 			.set({
@@ -276,12 +281,6 @@ export class ReversiService implements OnApplicationShutdown, OnModuleInit {
 		this.cacheGame(updatedGame);
 
 		//#region 盤面に最初から石がないなどして始まった瞬間に勝敗が決定する場合があるのでその処理
-		const engine = new Reversi.Game(updatedGame.map, {
-			isLlotheo: updatedGame.isLlotheo,
-			canPutEverywhere: updatedGame.canPutEverywhere,
-			loopedBoard: updatedGame.loopedBoard,
-		});
-
 		if (engine.isEnded) {
 			let winnerId;
 			if (engine.winner === true) {
@@ -406,7 +405,7 @@ export class ReversiService implements OnApplicationShutdown, OnModuleInit {
 
 		const serializeLogs = Reversi.Serializer.serializeLogs(logs);
 
-		const crc32 = CRC32.str(JSON.stringify(serializeLogs)).toString();
+		const crc32 = engine.calcCrc32().toString();
 
 		const updatedGame = {
 			...game,
@@ -536,7 +535,7 @@ export class ReversiService implements OnApplicationShutdown, OnModuleInit {
 		if (game == null) throw new Error('game not found');
 
 		if (crc32.toString() !== game.crc32) {
-			return await this.reversiGameEntityService.packDetail(game);
+			return game;
 		} else {
 			return null;
 		}

packages/backend/src/server/api/EndpointsModule.ts

@@ -372,6 +372,7 @@ import * as ep___reversi_match from './endpoints/reversi/match.js';
 import * as ep___reversi_invitations from './endpoints/reversi/invitations.js';
 import * as ep___reversi_showGame from './endpoints/reversi/show-game.js';
 import * as ep___reversi_surrender from './endpoints/reversi/surrender.js';
+import * as ep___reversi_verify from './endpoints/reversi/verify.js';
 import { GetterService } from './GetterService.js';
 import { ApiLoggerService } from './ApiLoggerService.js';
 import type { Provider } from '@nestjs/common';
@@ -742,6 +743,7 @@ const $reversi_match: Provider = { provide: 'ep:reversi/match', useClass: ep___r
 const $reversi_invitations: Provider = { provide: 'ep:reversi/invitations', useClass: ep___reversi_invitations.default };
 const $reversi_showGame: Provider = { provide: 'ep:reversi/show-game', useClass: ep___reversi_showGame.default };
 const $reversi_surrender: Provider = { provide: 'ep:reversi/surrender', useClass: ep___reversi_surrender.default };
+const $reversi_verify: Provider = { provide: 'ep:reversi/verify', useClass: ep___reversi_verify.default };
 
 @Module({
 	imports: [
@@ -1116,6 +1118,7 @@ const $reversi_surrender: Provider = { provide: 'ep:reversi/surrender', useClass
 		$reversi_invitations,
 		$reversi_showGame,
 		$reversi_surrender,
+		$reversi_verify,
 	],
 	exports: [
 		$admin_meta,
@@ -1481,6 +1484,7 @@ const $reversi_surrender: Provider = { provide: 'ep:reversi/surrender', useClass
 		$reversi_invitations,
 		$reversi_showGame,
 		$reversi_surrender,
+		$reversi_verify,
 	],
 })
 export class EndpointsModule {}

packages/backend/src/server/api/endpoints.ts

@@ -373,6 +373,7 @@ import * as ep___reversi_match from './endpoints/reversi/match.js';
 import * as ep___reversi_invitations from './endpoints/reversi/invitations.js';
 import * as ep___reversi_showGame from './endpoints/reversi/show-game.js';
 import * as ep___reversi_surrender from './endpoints/reversi/surrender.js';
+import * as ep___reversi_verify from './endpoints/reversi/verify.js';
 
 const eps = [
 	['admin/meta', ep___admin_meta],
@@ -741,6 +742,7 @@ const eps = [
 	['reversi/invitations', ep___reversi_invitations],
 	['reversi/show-game', ep___reversi_showGame],
 	['reversi/surrender', ep___reversi_surrender],
+	['reversi/verify', ep___reversi_verify],
 ];
 
 interface IEndpointMetaBase {

packages/backend/src/server/api/endpoints/reversi/verify.ts

@@ -0,0 +1,64 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { Injectable } from '@nestjs/common';
+import { Endpoint } from '@/server/api/endpoint-base.js';
+import { ReversiService } from '@/core/ReversiService.js';
+import { ReversiGameEntityService } from '@/core/entities/ReversiGameEntityService.js';
+import { ApiError } from '../../error.js';
+
+export const meta = {
+	errors: {
+		noSuchGame: {
+			message: 'No such game.',
+			code: 'NO_SUCH_GAME',
+			id: '8fb05624-b525-43dd-90f7-511852bdfeee',
+		},
+	},
+
+	res: {
+		type: 'object',
+		optional: false, nullable: false,
+		properties: {
+			desynced: { type: 'boolean' },
+			game: {
+				type: 'object',
+				optional: true, nullable: true,
+				ref: 'ReversiGameDetailed',
+			},
+		},
+	},
+} as const;
+
+export const paramDef = {
+	type: 'object',
+	properties: {
+		gameId: { type: 'string', format: 'misskey:id' },
+		crc32: { type: 'string' },
+	},
+	required: ['gameId', 'crc32'],
+} as const;
+
+@Injectable()
+export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-disable-line import/no-default-export
+	constructor(
+		private reversiService: ReversiService,
+		private reversiGameEntityService: ReversiGameEntityService,
+	) {
+		super(meta, paramDef, async (ps, me) => {
+			const game = await this.reversiService.checkCrc(ps.gameId, ps.crc32);
+			if (game) {
+				return {
+					desynced: true,
+					game: await this.reversiGameEntityService.packDetail(game),
+				};
+			} else {
+				return {
+					desynced: false,
+				};
+			}
+		});
+	}
+}

packages/backend/src/server/api/stream/channels/reversi-game.ts

@@ -4,7 +4,7 @@
  */
 
 import { Inject, Injectable } from '@nestjs/common';
-import type { MiReversiGame, ReversiGamesRepository } from '@/models/_.js';
+import type { MiReversiGame } from '@/models/_.js';
 import { DI } from '@/di-symbols.js';
 import { bindThis } from '@/decorators.js';
 import { ReversiService } from '@/core/ReversiService.js';
@@ -19,7 +19,6 @@ class ReversiGameChannel extends Channel {
 
 	constructor(
 		private reversiService: ReversiService,
-		private reversiGamesRepository: ReversiGamesRepository,
 		private reversiGameEntityService: ReversiGameEntityService,
 
 		id: string,
@@ -42,7 +41,6 @@ class ReversiGameChannel extends Channel {
 			case 'updateSettings': this.updateSettings(body.key, body.value); break;
 			case 'cancel': this.cancelGame(); break;
 			case 'putStone': this.putStone(body.pos, body.id); break;
-			case 'resync': this.resync(body.crc32); break;
 			case 'claimTimeIsUp': this.claimTimeIsUp(); break;
 		}
 	}
@@ -75,14 +73,6 @@ class ReversiGameChannel extends Channel {
 		this.reversiService.putStoneToGame(this.gameId!, this.user, pos, id);
 	}
 
-	@bindThis
-	private async resync(crc32: string | number) {
-		const game = await this.reversiService.checkCrc(this.gameId!, crc32);
-		if (game) {
-			this.send('resynced', game);
-		}
-	}
-
 	@bindThis
 	private async claimTimeIsUp() {
 		if (this.user == null) return;
@@ -104,9 +94,6 @@ export class ReversiGameChannelService implements MiChannelService<false> {
 	public readonly kind = ReversiGameChannel.kind;
 
 	constructor(
-		@Inject(DI.reversiGamesRepository)
-		private reversiGamesRepository: ReversiGamesRepository,
-
 		private reversiService: ReversiService,
 		private reversiGameEntityService: ReversiGameEntityService,
 	) {
@@ -116,7 +103,6 @@ export class ReversiGameChannelService implements MiChannelService<false> {
 	public create(id: string, connection: Channel['connection']): ReversiGameChannel {
 		return new ReversiGameChannel(
 			this.reversiService,
-			this.reversiGamesRepository,
 			this.reversiGameEntityService,
 			id,
 			connection,