Sharkey/packages/backend/src/core/entities/MutingEntityService.ts
zyoshoka 514a65e453
perf(backend): avoid N+1 selects from user table when packing many entities (#13911)
* perf(backend): avoid N+1 selects from `user` table when packing many entities

* perf(backend): use `packMany` instead of mapping to `pack`
2024-05-31 15:32:42 +09:00

61 lines
1.9 KiB
TypeScript

/*
* SPDX-FileCopyrightText: syuilo and misskey-project
* SPDX-License-Identifier: AGPL-3.0-only
*/
import { Inject, Injectable } from '@nestjs/common';
import { DI } from '@/di-symbols.js';
import type { MutingsRepository } from '@/models/_.js';
import { awaitAll } from '@/misc/prelude/await-all.js';
import type { Packed } from '@/misc/json-schema.js';
import type { } from '@/models/Blocking.js';
import type { MiUser } from '@/models/User.js';
import type { MiMuting } from '@/models/Muting.js';
import { bindThis } from '@/decorators.js';
import { IdService } from '@/core/IdService.js';
import { UserEntityService } from './UserEntityService.js';
@Injectable()
export class MutingEntityService {
constructor(
@Inject(DI.mutingsRepository)
private mutingsRepository: MutingsRepository,
private userEntityService: UserEntityService,
private idService: IdService,
) {
}
@bindThis
public async pack(
src: MiMuting['id'] | MiMuting,
me?: { id: MiUser['id'] } | null | undefined,
hints?: {
packedMutee?: Packed<'UserDetailedNotMe'>,
},
): Promise<Packed<'Muting'>> {
const muting = typeof src === 'object' ? src : await this.mutingsRepository.findOneByOrFail({ id: src });
return await awaitAll({
id: muting.id,
createdAt: this.idService.parse(muting.id).date.toISOString(),
expiresAt: muting.expiresAt ? muting.expiresAt.toISOString() : null,
muteeId: muting.muteeId,
mutee: hints?.packedMutee ?? this.userEntityService.pack(muting.muteeId, me, {
schema: 'UserDetailedNotMe',
}),
});
}
@bindThis
public async packMany(
mutings: MiMuting[],
me: { id: MiUser['id'] },
) {
const _mutees = mutings.map(({ mutee, muteeId }) => mutee ?? muteeId);
const _userMap = await this.userEntityService.packMany(_mutees, me, { schema: 'UserDetailedNotMe' })
.then(users => new Map(users.map(u => [u.id, u])));
return Promise.all(mutings.map(muting => this.pack(muting, me, { packedMutee: _userMap.get(muting.muteeId) })));
}
}