29f6ba6310
* chore: add workflow which checks if SPDX ID exists * chore: add missing SPDX ID in some files * chore: change trigger condition * chore: trigger on push * lint
109 lines
3 KiB
TypeScript
109 lines
3 KiB
TypeScript
/*
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* SPDX-FileCopyrightText: syuilo and misskey-project
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* SPDX-License-Identifier: AGPL-3.0-only
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*/
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import { Inject, Injectable, OnModuleInit } from '@nestjs/common';
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import Redis from 'ioredis';
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import { DI } from '@/di-symbols.js';
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import type { ChannelFollowingsRepository } from '@/models/_.js';
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import { MiChannel } from '@/models/_.js';
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import { IdService } from '@/core/IdService.js';
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import { GlobalEvents, GlobalEventService } from '@/core/GlobalEventService.js';
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import { bindThis } from '@/decorators.js';
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import type { MiLocalUser } from '@/models/User.js';
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import { RedisKVCache } from '@/misc/cache.js';
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@Injectable()
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export class ChannelFollowingService implements OnModuleInit {
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public userFollowingChannelsCache: RedisKVCache<Set<string>>;
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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.redisForSub)
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private redisForSub: Redis.Redis,
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@Inject(DI.channelFollowingsRepository)
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private channelFollowingsRepository: ChannelFollowingsRepository,
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private idService: IdService,
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private globalEventService: GlobalEventService,
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) {
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this.userFollowingChannelsCache = new RedisKVCache<Set<string>>(this.redisClient, 'userFollowingChannels', {
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lifetime: 1000 * 60 * 30, // 30m
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memoryCacheLifetime: 1000 * 60, // 1m
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fetcher: (key) => this.channelFollowingsRepository.find({
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where: { followerId: key },
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select: ['followeeId'],
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}).then(xs => new Set(xs.map(x => x.followeeId))),
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toRedisConverter: (value) => JSON.stringify(Array.from(value)),
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fromRedisConverter: (value) => new Set(JSON.parse(value)),
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});
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this.redisForSub.on('message', this.onMessage);
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}
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onModuleInit() {
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}
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@bindThis
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public async follow(
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requestUser: MiLocalUser,
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targetChannel: MiChannel,
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): Promise<void> {
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await this.channelFollowingsRepository.insert({
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id: this.idService.gen(),
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followerId: requestUser.id,
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followeeId: targetChannel.id,
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});
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this.globalEventService.publishInternalEvent('followChannel', {
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userId: requestUser.id,
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channelId: targetChannel.id,
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});
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}
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@bindThis
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public async unfollow(
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requestUser: MiLocalUser,
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targetChannel: MiChannel,
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): Promise<void> {
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await this.channelFollowingsRepository.delete({
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followerId: requestUser.id,
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followeeId: targetChannel.id,
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});
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this.globalEventService.publishInternalEvent('unfollowChannel', {
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userId: requestUser.id,
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channelId: targetChannel.id,
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});
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}
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@bindThis
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private async onMessage(_: string, data: string): Promise<void> {
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const obj = JSON.parse(data);
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if (obj.channel === 'internal') {
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const { type, body } = obj.message as GlobalEvents['internal']['payload'];
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switch (type) {
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case 'followChannel': {
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this.userFollowingChannelsCache.refresh(body.userId);
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break;
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}
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case 'unfollowChannel': {
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this.userFollowingChannelsCache.delete(body.userId);
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break;
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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 dispose(): void {
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this.userFollowingChannelsCache.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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