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/*
* 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 { FollowingsRepository } from '@/models/_.js';
import { awaitAll } from '@/misc/prelude/await-all.js';
import type { Packed } from '@/misc/json-schema.js';
import { MiBlocking } from '@/models/Blocking.js';
import { MiUserProfile } from '@/models/UserProfile.js';
import type { MiLocalUser, MiUser } from '@/models/User.js';
import { MiFollowing } from '@/models/Following.js';
import { bindThis } from '@/decorators.js';
import { IdService } from '@/core/IdService.js';
import { QueryService } from '@/core/QueryService.js';
import { RoleService } from '@/core/RoleService.js';
import { UserEntityService } from './UserEntityService.js';
type LocalFollowerFollowing = MiFollowing & {
followerHost: null;
followerInbox: null;
followerSharedInbox: null;
};
type RemoteFollowerFollowing = MiFollowing & {
followerHost: string;
followerInbox: string;
followerSharedInbox: string;
};
type LocalFolloweeFollowing = MiFollowing & {
followeeHost: null;
followeeInbox: null;
followeeSharedInbox: null;
};
type RemoteFolloweeFollowing = MiFollowing & {
followeeHost: string;
followeeInbox: string;
followeeSharedInbox: string;
};
@Injectable()
export class FollowingEntityService {
constructor(
@Inject(DI.followingsRepository)
private followingsRepository: FollowingsRepository,
private userEntityService: UserEntityService,
private idService: IdService,
private queryService: QueryService,
private roleService: RoleService,
) {
}
@bindThis
public isLocalFollower(following: MiFollowing): following is LocalFollowerFollowing {
return following.followerHost == null;
}
@bindThis
public isRemoteFollower(following: MiFollowing): following is RemoteFollowerFollowing {
return following.followerHost != null;
}
@bindThis
public isLocalFollowee(following: MiFollowing): following is LocalFolloweeFollowing {
return following.followeeHost == null;
}
@bindThis
public isRemoteFollowee(following: MiFollowing): following is RemoteFolloweeFollowing {
return following.followeeHost != null;
}
@bindThis
public async getFollowing(me: MiLocalUser, params: FollowsQueryParams) {
return await this.getFollows(me, params, 'following.followerHost = :host');
}
@bindThis
public async getFollowers(me: MiLocalUser, params: FollowsQueryParams) {
return await this.getFollows(me, params, 'following.followeeHost = :host');
}
private async getFollows(me: MiLocalUser, params: FollowsQueryParams, condition: string) {
const builder = this.followingsRepository.createQueryBuilder('following');
const query = this.queryService
.makePaginationQuery(builder, params.sinceId, params.untilId)
.andWhere(condition, { host: params.host })
.limit(params.limit);
if (!await this.roleService.isModerator(me)) {
query.setParameter('me', me.id);
// Make sure that the followee doesn't block us, if their profile will be included.
if (params.includeFollowee) {
query.leftJoin(MiBlocking, 'followee_blocking', 'followee_blocking."blockerId" = following."followeeId" AND followee_blocking."blockeeId" = :me');
query.andWhere('followee_blocking.id IS NULL');
}
// Make sure that the follower doesn't block us, if their profile will be included.
if (params.includeFollower) {
query.leftJoin(MiBlocking, 'follower_blocking', 'follower_blocking."blockerId" = following."followerId" AND follower_blocking."blockeeId" = :me');
query.andWhere('follower_blocking.id IS NULL');
}
// Make sure that the followee hasn't hidden this connection.
query.leftJoin(MiUserProfile, 'followee', 'followee."userId" = following."followeeId"');
query.leftJoin(MiFollowing, 'me_following_followee', 'me_following_followee."followerId" = :me AND me_following_followee."followeeId" = following."followerId"');
query.andWhere('(followee."userId" = :me OR followee."followersVisibility" = \'public\' OR (followee."followersVisibility" = \'followers\' AND me_following_followee.id IS NOT NULL))');
// Make sure that the follower hasn't hidden this connection.
query.leftJoin(MiUserProfile, 'follower', 'follower."userId" = following."followerId"');
query.leftJoin(MiFollowing, 'me_following_follower', 'me_following_follower."followerId" = :me AND me_following_follower."followeeId" = following."followerId"');
query.andWhere('(follower."userId" = :me OR follower."followingVisibility" = \'public\' OR (follower."followingVisibility" = \'followers\' AND me_following_follower.id IS NOT NULL))');
}
const followings = await query.getMany();
return await this.packMany(followings, me, { populateFollowee: params.includeFollowee, populateFollower: params.includeFollower });
}
@bindThis
public async pack(
src: MiFollowing['id'] | MiFollowing,
me?: { id: MiUser['id'] } | null | undefined,
opts?: {
populateFollowee?: boolean;
populateFollower?: boolean;
},
hint?: {
packedFollowee?: Packed<'UserDetailedNotMe'>,
packedFollower?: Packed<'UserDetailedNotMe'>,
},
): Promise<Packed<'Following'>> {
const following = typeof src === 'object' ? src : await this.followingsRepository.findOneByOrFail({ id: src });
if (opts == null) opts = {};
return await awaitAll({
id: following.id,
createdAt: this.idService.parse(following.id).date.toISOString(),
followeeId: following.followeeId,
followerId: following.followerId,
followee: opts.populateFollowee ? hint?.packedFollowee ?? this.userEntityService.pack(following.followee ?? following.followeeId, me, {
schema: 'UserDetailedNotMe',
}) : undefined,
follower: opts.populateFollower ? hint?.packedFollower ?? this.userEntityService.pack(following.follower ?? following.followerId, me, {
schema: 'UserDetailedNotMe',
}) : undefined,
});
}
@bindThis
public async packMany(
followings: MiFollowing[],
me?: { id: MiUser['id'] } | null | undefined,
opts?: {
populateFollowee?: boolean;
populateFollower?: boolean;
},
) {
const _followees = opts?.populateFollowee ? followings.map(({ followee, followeeId }) => followee ?? followeeId) : [];
const _followers = opts?.populateFollower ? followings.map(({ follower, followerId }) => follower ?? followerId) : [];
const _userMap = await this.userEntityService.packMany([..._followees, ..._followers], me, { schema: 'UserDetailedNotMe' })
.then(users => new Map(users.map(u => [u.id, u])));
return Promise.all(
followings.map(following => {
const packedFollowee = opts?.populateFollowee ? _userMap.get(following.followeeId) : undefined;
const packedFollower = opts?.populateFollower ? _userMap.get(following.followerId) : undefined;
return this.pack(following, me, opts, { packedFollowee, packedFollower });
}),
);
}
}
interface FollowsQueryParams {
readonly host: string;
readonly limit: number;
readonly includeFollower: boolean;
readonly includeFollowee: boolean;
readonly sinceId?: string;
readonly untilId?: string;
}
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