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note.ts
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note.ts
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import * as mongo from 'mongodb';
import * as promiseLimit from 'promise-limit';
import config from '../../../config';
import Resolver from '../resolver';
import Note, { INote } from '../../../models/note';
import post from '../../../services/note/create';
import { INote as INoteActivityStreamsObject, IObject } from '../type';
import { resolvePerson, updatePerson } from './person';
import { resolveImage } from './image';
import { IRemoteUser, IUser } from '../../../models/user';
import { fromHtml } from '../../../mfm/fromHtml';
import Emoji, { IEmoji } from '../../../models/emoji';
import { ITag, extractHashtags } from './tag';
import { toUnicode } from 'punycode';
import { unique, concat, difference } from '../../../prelude/array';
import { extractPollFromQuestion } from './question';
import vote from '../../../services/note/polls/vote';
import { apLogger } from '../logger';
import { IDriveFile } from '../../../models/drive-file';
const logger = apLogger;
/**
* Noteをフェッチします。
*
* Misskeyに対象のNoteが登録されていればそれを返します。
*/
export async function fetchNote(value: string | IObject, resolver?: Resolver): Promise<INote> {
const uri = typeof value == 'string' ? value : value.id;
// URIがこのサーバーを指しているならデータベースからフェッチ
if (uri.startsWith(config.url + '/')) {
const id = new mongo.ObjectID(uri.split('/').pop());
return await Note.findOne({ _id: id });
}
//#region このサーバーに既に登録されていたらそれを返す
const exist = await Note.findOne({ uri });
if (exist) {
return exist;
}
//#endregion
return null;
}
/**
* Noteを作成します。
*/
export async function createNote(value: any, resolver?: Resolver, silent = false): Promise<INote> {
if (resolver == null) resolver = new Resolver();
const object: any = await resolver.resolve(value);
if (!object || !['Note', 'Question'].includes(object.type)) {
logger.error(`invalid note: ${object}`);
return null;
}
const note: INoteActivityStreamsObject = object;
logger.info(`Creating the Note: ${note.id}`);
// 投稿者をフェッチ
const actor = await resolvePerson(note.attributedTo, null, resolver) as IRemoteUser;
// 投稿者が凍結されていたらスキップ
if (actor.isSuspended) {
return null;
}
//#region Visibility
let visibility = 'public';
let visibleUsers: IUser[] = [];
if (!note.to.includes('https://www.w3.org/ns/activitystreams#Public')) {
if (note.cc.includes('https://www.w3.org/ns/activitystreams#Public')) {
visibility = 'home';
} else if (note.to.includes(`${actor.uri}/followers`)) { // TODO: person.followerと照合するべき?
visibility = 'followers';
} else {
visibility = 'specified';
visibleUsers = await Promise.all(note.to.map(uri => resolvePerson(uri, null, resolver)));
}
}
//#endergion
const apMentions = await extractMentionedUsers(actor, note.to, note.cc, resolver);
const apHashtags = await extractHashtags(note.tag);
// 添付ファイル
// TODO: attachmentは必ずしもImageではない
// TODO: attachmentは必ずしも配列ではない
// Noteがsensitiveなら添付もsensitiveにする
const limit = promiseLimit(2);
const files = note.attachment
.map(attach => attach.sensitive = note.sensitive)
? await Promise.all(note.attachment.map(x => limit(() => resolveImage(actor, x)) as Promise<IDriveFile>))
: [];
// リプライ
const reply = note.inReplyTo ? await resolveNote(note.inReplyTo, resolver) : null;
// 引用
let quote: INote;
if (note._misskey_quote && typeof note._misskey_quote == 'string') {
quote = await resolveNote(note._misskey_quote).catch(() => null);
}
const cw = note.summary === '' ? null : note.summary;
// テキストのパース
const text = note._misskey_content || fromHtml(note.content);
// vote
if (reply && reply.poll) {
const tryCreateVote = async (name: string, index: number): Promise<null> => {
if (reply.poll.expiresAt && new Date(note.published) < reply.poll.expiresAt) {
logger.info(`vote from AP: actor=${actor.username}@${actor.host}, note=${note.id}, choice=${name}`);
await vote(actor, reply, index);
}
return null;
};
if (note.name) {
const reverted =
~reply.poll.choices.findIndex(x => x.text === note.name) ||
~reply.poll.choices.findIndex(x => x.text.toLocaleLowerCase() === note.name.toLocaleLowerCase());
if (reverted) {
return await tryCreateVote(note.name, ~reverted);
}
}
if (text) {
const m = text.match(/(\d+)$/);
if (m) {
return await tryCreateVote(m[0], Number(m[1]));
}
}
}
const emojis = await extractEmojis(note.tag, actor.host).catch(e => {
logger.info(`extractEmojis: ${e}`);
return [] as IEmoji[];
});
const apEmojis = emojis.map(emoji => emoji.name);
const questionUri = note._misskey_question;
const poll = await extractPollFromQuestion(note._misskey_question || note).catch(() => undefined);
// ユーザーの情報が古かったらついでに更新しておく
if (actor.lastFetchedAt == null || Date.now() - actor.lastFetchedAt.getTime() > 1000 * 60 * 60 * 24) {
updatePerson(note.attributedTo);
}
return await post(actor, {
createdAt: new Date(note.published),
files,
reply,
renote: quote,
cw,
text,
viaMobile: false,
localOnly: false,
geo: undefined,
visibility,
visibleUsers,
apMentions,
apHashtags,
apEmojis,
questionUri,
poll,
uri: note.id
}, silent);
}
/**
* Noteを解決します。
*
* Misskeyに対象のNoteが登録されていればそれを返し、そうでなければ
* リモートサーバーからフェッチしてMisskeyに登録しそれを返します。
*/
export async function resolveNote(value: string | IObject, resolver?: Resolver): Promise<INote> {
const uri = typeof value == 'string' ? value : value.id;
//#region このサーバーに既に登録されていたらそれを返す
const exist = await fetchNote(uri);
if (exist) {
return exist;
}
//#endregion
// リモートサーバーからフェッチしてきて登録
// ここでuriの代わりに添付されてきたNote Objectが指定されていると、サーバーフェッチを経ずにノートが生成されるが
// 添付されてきたNote Objectは偽装されている可能性があるため、常にuriを指定してサーバーフェッチを行う。
return await createNote(uri, resolver);
}
export async function extractEmojis(tags: ITag[], host_: string) {
const host = toUnicode(host_.toLowerCase());
if (!tags) return [];
const eomjiTags = tags.filter(tag => tag.type === 'Emoji' && tag.icon && tag.icon.url);
return await Promise.all(
eomjiTags.map(async tag => {
const name = tag.name.replace(/^:/, '').replace(/:$/, '');
const exists = await Emoji.findOne({
host,
name
});
if (exists) {
if ((tag.updated != null && exists.updatedAt == null)
|| (tag.id != null && exists.uri == null)
|| (tag.updated != null && exists.updatedAt != null && new Date(tag.updated) > exists.updatedAt)) {
return await Emoji.findOneAndUpdate({
host,
name,
}, {
$set: {
uri: tag.id,
url: tag.icon.url,
updatedAt: new Date(tag.updated),
}
});
}
return exists;
}
logger.info(`register emoji host=${host}, name=${name}`);
return await Emoji.insert({
host,
name,
uri: tag.id,
url: tag.icon.url,
updatedAt: tag.updated ? new Date(tag.updated) : undefined,
aliases: []
});
})
);
}
async function extractMentionedUsers(actor: IRemoteUser, to: string[], cc: string[], resolver: Resolver) {
const ignoreUris = ['https://www.w3.org/ns/activitystreams#Public', `${actor.uri}/followers`];
const uris = difference(unique(concat([to || [], cc || []])), ignoreUris);
const limit = promiseLimit(2);
const users = await Promise.all(
uris.map(uri => limit(() => resolvePerson(uri, null, resolver).catch(() => null)) as Promise<IUser>)
);
return users.filter(x => x != null);
}