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/*
* SPDX-FileCopyrightText: syuilo and misskey-project
* SPDX-License-Identifier: AGPL-3.0-only
*/
import { Not, In, IsNull } from 'typeorm';
import { Inject, Injectable } from '@nestjs/common';
import { maximum } from '@/misc/prelude/array.js';
import type { NotesRepository } from '@/models/_.js';
import { Endpoint } from '@/server/api/endpoint-base.js';
import { UserEntityService } from '@/core/entities/UserEntityService.js';
import { DI } from '@/di-symbols.js';
import { GetterService } from '@/server/api/GetterService.js';
import { ApiError } from '../../error.js';
export const meta = {
tags: ['users'],
requireCredential: false,
description: 'Get a list of other users that the specified user frequently replies to.',
res: {
type: 'array',
optional: false, nullable: false,
items: {
type: 'object',
optional: false, nullable: false,
properties: {
user: {
type: 'object',
optional: false, nullable: false,
ref: 'UserDetailed',
},
weight: {
type: 'number',
optional: false, nullable: false,
},
},
},
},
errors: {
noSuchUser: {
message: 'No such user.',
code: 'NO_SUCH_USER',
id: 'e6965129-7b2a-40a4-bae2-cd84cd434822',
},
},
// 2 calls per second
limit: {
duration: 1000,
max: 2,
},
} as const;
export const paramDef = {
type: 'object',
properties: {
userId: { type: 'string', format: 'misskey:id' },
limit: { type: 'integer', minimum: 1, maximum: 100, default: 10 },
},
required: ['userId'],
} as const;
@Injectable()
export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-disable-line import/no-default-export
constructor(
@Inject(DI.notesRepository)
private notesRepository: NotesRepository,
private userEntityService: UserEntityService,
private getterService: GetterService,
) {
super(meta, paramDef, async (ps, me) => {
// Lookup user
const user = await this.getterService.getUser(ps.userId).catch(err => {
if (err.id === '15348ddd-432d-49c2-8a5a-8069753becff') throw new ApiError(meta.errors.noSuchUser);
throw err;
});
// Fetch recent notes
const recentNotes = await this.notesRepository.find({
where: {
userId: user.id,
replyId: Not(IsNull()),
},
order: {
id: -1,
},
take: 1000,
select: ['replyId'],
});
// 投稿が少なかったら中断
if (recentNotes.length === 0) {
return [];
}
// TODO ミュートを考慮
const replyTargetNotes = await this.notesRepository.find({
where: {
id: In(recentNotes.map(p => p.replyId)),
},
select: ['userId'],
});
const repliedUsers: any = {};
// Extract replies from recent notes
for (const userId of replyTargetNotes.map(x => x.userId.toString())) {
if (repliedUsers[userId]) {
repliedUsers[userId]++;
} else {
repliedUsers[userId] = 1;
}
}
// Calc peak
const peak = maximum(Object.values(repliedUsers));
// Sort replies by frequency
const repliedUsersSorted = Object.keys(repliedUsers).sort((a, b) => repliedUsers[b] - repliedUsers[a]);
// Extract top replied users
const topRepliedUserIds = repliedUsersSorted.slice(0, ps.limit);
// Make replies object (includes weights)
const _userMap = await this.userEntityService.packMany(topRepliedUserIds, me, { schema: 'UserDetailed' })
.then(users => new Map(users.map(u => [u.id, u])));
const repliesObj = await Promise.all(topRepliedUserIds.map(async (userId) => ({
user: _userMap.get(userId) ?? await this.userEntityService.pack(userId, me, { schema: 'UserDetailed' }),
weight: repliedUsers[userId] / peak,
})));
return repliesObj;
});
}
}
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