90 lines
2.7 KiB
TypeScript
90 lines
2.7 KiB
TypeScript
import { Inject, Injectable, OnApplicationShutdown } from '@nestjs/common';
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import * as Redis from 'ioredis';
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import type { InstancesRepository } from '@/models/index.js';
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import type { Instance } from '@/models/entities/Instance.js';
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import { MemoryKVCache, RedisKVCache } from '@/misc/cache.js';
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import { IdService } from '@/core/IdService.js';
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import { DI } from '@/di-symbols.js';
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import { UtilityService } from '@/core/UtilityService.js';
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import { bindThis } from '@/decorators.js';
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@Injectable()
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export class FederatedInstanceService implements OnApplicationShutdown {
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public federatedInstanceCache: RedisKVCache<Instance | null>;
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constructor(
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@Inject(DI.redis)
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private redisClient: Redis.Redis,
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@Inject(DI.instancesRepository)
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private instancesRepository: InstancesRepository,
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private utilityService: UtilityService,
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private idService: IdService,
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) {
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this.federatedInstanceCache = new RedisKVCache<Instance | null>(this.redisClient, 'federatedInstance', {
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lifetime: 1000 * 60 * 30, // 30m
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memoryCacheLifetime: 1000 * 60 * 3, // 3m
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fetcher: (key) => this.instancesRepository.findOneBy({ host: key }),
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toRedisConverter: (value) => JSON.stringify(value),
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fromRedisConverter: (value) => {
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const parsed = JSON.parse(value);
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if (parsed == null) return null;
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return {
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...parsed,
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firstRetrievedAt: new Date(parsed.firstRetrievedAt),
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latestRequestReceivedAt: parsed.latestRequestReceivedAt ? new Date(parsed.latestRequestReceivedAt) : null,
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infoUpdatedAt: parsed.infoUpdatedAt ? new Date(parsed.infoUpdatedAt) : null,
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};
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},
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});
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}
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@bindThis
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public async fetch(host: string): Promise<Instance> {
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host = this.utilityService.toPuny(host);
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const cached = await this.federatedInstanceCache.get(host);
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if (cached) return cached;
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const index = await this.instancesRepository.findOneBy({ host });
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if (index == null) {
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const i = await this.instancesRepository.insert({
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id: this.idService.genId(),
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host,
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firstRetrievedAt: new Date(),
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}).then(x => this.instancesRepository.findOneByOrFail(x.identifiers[0]));
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this.federatedInstanceCache.set(host, i);
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return i;
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} else {
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this.federatedInstanceCache.set(host, index);
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return index;
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}
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}
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@bindThis
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public async update(id: Instance['id'], data: Partial<Instance>): Promise<void> {
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const result = await this.instancesRepository.createQueryBuilder().update()
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.set(data)
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.where('id = :id', { id })
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.returning('*')
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.execute()
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.then((response) => {
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return response.raw[0];
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});
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this.federatedInstanceCache.set(result.host, result);
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}
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@bindThis
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public dispose(): void {
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this.federatedInstanceCache.dispose();
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}
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@bindThis
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public onApplicationShutdown(signal?: string | undefined): void {
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this.dispose();
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}
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}
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