Sharkey/packages/backend/src/core/InstanceActorService.ts
2023-04-06 11:14:43 +09:00

44 lines
1.2 KiB
TypeScript

import { Inject, Injectable } from '@nestjs/common';
import { IsNull } from 'typeorm';
import type { LocalUser } from '@/models/entities/User.js';
import type { UsersRepository } from '@/models/index.js';
import { MemorySingleCache } from '@/misc/cache.js';
import { DI } from '@/di-symbols.js';
import { CreateSystemUserService } from '@/core/CreateSystemUserService.js';
import { bindThis } from '@/decorators.js';
const ACTOR_USERNAME = 'instance.actor' as const;
@Injectable()
export class InstanceActorService {
private cache: MemorySingleCache<LocalUser>;
constructor(
@Inject(DI.usersRepository)
private usersRepository: UsersRepository,
private createSystemUserService: CreateSystemUserService,
) {
this.cache = new MemorySingleCache<LocalUser>(Infinity);
}
@bindThis
public async getInstanceActor(): Promise<LocalUser> {
const cached = this.cache.get();
if (cached) return cached;
const user = await this.usersRepository.findOneBy({
host: IsNull(),
username: ACTOR_USERNAME,
}) as LocalUser | undefined;
if (user) {
this.cache.set(user);
return user;
} else {
const created = await this.createSystemUserService.createSystemUser(ACTOR_USERNAME) as LocalUser;
this.cache.set(created);
return created;
}
}
}