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/*
* SPDX-FileCopyrightText: syuilo and misskey-project
* SPDX-License-Identifier: AGPL-3.0-only
*/
import { Inject, Injectable, OnApplicationShutdown } from '@nestjs/common';
import * as Redis from 'ioredis';
import type { InstancesRepository, MiMeta } from '@/models/_.js';
import type { MiInstance } from '@/models/Instance.js';
import { MemoryKVCache } from '@/misc/cache.js';
import { IdService } from '@/core/IdService.js';
import { DI } from '@/di-symbols.js';
import { UtilityService } from '@/core/UtilityService.js';
import { bindThis } from '@/decorators.js';
import type { GlobalEvents } from '@/core/GlobalEventService.js';
import { Serialized } from '@/types.js';
import { diffArrays, diffArraysSimple } from '@/misc/diff-arrays.js';
@Injectable()
export class FederatedInstanceService implements OnApplicationShutdown {
private readonly federatedInstanceCache: MemoryKVCache<MiInstance | null>;
constructor(
@Inject(DI.redisForSub)
private redisForSub: Redis.Redis,
@Inject(DI.instancesRepository)
private instancesRepository: InstancesRepository,
private utilityService: UtilityService,
private idService: IdService,
) {
this.federatedInstanceCache = new MemoryKVCache(1000 * 60 * 3); // 3m
this.redisForSub.on('message', this.onMessage);
}
@bindThis
public async fetchOrRegister(host: string): Promise<MiInstance> {
host = this.utilityService.toPuny(host);
const cached = this.federatedInstanceCache.get(host);
if (cached) return cached;
let index = await this.instancesRepository.findOneBy({ host });
if (index == null) {
await this.instancesRepository.createQueryBuilder('instance')
.insert()
.values({
id: this.idService.gen(),
host,
firstRetrievedAt: new Date(),
isBlocked: this.utilityService.isBlockedHost(host),
isSilenced: this.utilityService.isSilencedHost(host),
isMediaSilenced: this.utilityService.isMediaSilencedHost(host),
isAllowListed: this.utilityService.isAllowListedHost(host),
isBubbled: this.utilityService.isBubbledHost(host),
})
.orIgnore()
.execute();
index = await this.instancesRepository.findOneByOrFail({ host });
}
this.federatedInstanceCache.set(host, index);
return index;
}
@bindThis
public async fetch(host: string): Promise<MiInstance | null> {
host = this.utilityService.toPuny(host);
const cached = this.federatedInstanceCache.get(host);
if (cached !== undefined) return cached;
const index = await this.instancesRepository.findOneBy({ host });
if (index == null) {
this.federatedInstanceCache.set(host, null);
return null;
} else {
this.federatedInstanceCache.set(host, index);
return index;
}
}
@bindThis
public async update(id: MiInstance['id'], data: Partial<MiInstance>): Promise<void> {
const result = await this.instancesRepository.createQueryBuilder().update()
.set(data)
.where('id = :id', { id })
.returning('*')
.execute()
.then((response) => {
return response.raw[0];
});
this.federatedInstanceCache.set(result.host, result);
}
private syncCache(before: Serialized<MiMeta | undefined>, after: Serialized<MiMeta>): void {
const changed =
diffArraysSimple(before?.blockedHosts, after.blockedHosts) ||
diffArraysSimple(before?.silencedHosts, after.silencedHosts) ||
diffArraysSimple(before?.mediaSilencedHosts, after.mediaSilencedHosts) ||
diffArraysSimple(before?.federationHosts, after.federationHosts) ||
diffArraysSimple(before?.bubbleInstances, after.bubbleInstances);
if (changed) {
// We have to clear the whole thing, otherwise subdomains won't be synced.
this.federatedInstanceCache.clear();
}
}
@bindThis
private async onMessage(_: string, data: string): Promise<void> {
const obj = JSON.parse(data);
if (obj.channel === 'internal') {
const { type, body } = obj.message as GlobalEvents['internal']['payload'];
if (type === 'metaUpdated') {
this.syncCache(body.before, body.after);
}
}
}
@bindThis
public dispose(): void {
this.redisForSub.off('message', this.onMessage);
this.federatedInstanceCache.dispose();
}
@bindThis
public onApplicationShutdown(signal?: string | undefined): void {
this.dispose();
}
}
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