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import { Inject, Injectable } from '@nestjs/common';
import { In } from 'typeorm';
import { DI } from '@/di-symbols.js';
import type { Config } from '@/config.js';
import { bindThis } from '@/decorators.js';
import { Note } from '@/models/entities/Note.js';
import { User } from '@/models/index.js';
import type { NotesRepository } from '@/models/index.js';
import { sqlLikeEscape } from '@/misc/sql-like-escape.js';
import { QueryService } from '@/core/QueryService.js';
import { IdService } from '@/core/IdService.js';
import type { Index, MeiliSearch } from 'meilisearch';
type K = string;
type V = string | number | boolean;
type Q =
{ op: '=', k: K, v: V } |
{ op: '!=', k: K, v: V } |
{ op: '>', k: K, v: number } |
{ op: '<', k: K, v: number } |
{ op: '>=', k: K, v: number } |
{ op: '<=', k: K, v: number } |
{ op: 'and', qs: Q[] } |
{ op: 'or', qs: Q[] } |
{ op: 'not', q: Q };
function compileValue(value: V): string {
if (typeof value === 'string') {
return `'${value}'`; // TODO: escape
} else if (typeof value === 'number') {
return value.toString();
} else if (typeof value === 'boolean') {
return value.toString();
}
throw new Error('unrecognized value');
}
function compileQuery(q: Q): string {
switch (q.op) {
case '=': return `(${q.k} = ${compileValue(q.v)})`;
case '!=': return `(${q.k} != ${compileValue(q.v)})`;
case '>': return `(${q.k} > ${compileValue(q.v)})`;
case '<': return `(${q.k} < ${compileValue(q.v)})`;
case '>=': return `(${q.k} >= ${compileValue(q.v)})`;
case '<=': return `(${q.k} <= ${compileValue(q.v)})`;
case 'and': return q.qs.length === 0 ? '' : `(${ q.qs.map(_q => compileQuery(_q)).join(' AND ') })`;
case 'or': return q.qs.length === 0 ? '' : `(${ q.qs.map(_q => compileQuery(_q)).join(' OR ') })`;
case 'not': return `(NOT ${compileQuery(q.q)})`;
default: throw new Error('unrecognized query operator');
}
}
@Injectable()
export class SearchService {
private meilisearchNoteIndex: Index | null = null;
constructor(
@Inject(DI.config)
private config: Config,
@Inject(DI.meilisearch)
private meilisearch: MeiliSearch | null,
@Inject(DI.notesRepository)
private notesRepository: NotesRepository,
private queryService: QueryService,
private idService: IdService,
) {
if (meilisearch) {
this.meilisearchNoteIndex = meilisearch.index('notes');
this.meilisearchNoteIndex.updateSettings({
searchableAttributes: [
'text',
'cw',
],
sortableAttributes: [
'createdAt',
],
filterableAttributes: [
'createdAt',
'userId',
'userHost',
'channelId',
],
typoTolerance: {
enabled: false,
},
pagination: {
maxTotalHits: 10000,
},
});
}
}
@bindThis
public async indexNote(note: Note): Promise<void> {
if (this.meilisearch) {
this.meilisearchNoteIndex!.addDocuments([{
id: note.id,
createdAt: note.createdAt.getTime(),
userId: note.userId,
userHost: note.userHost,
channelId: note.channelId,
cw: note.cw,
text: note.text,
}], {
primaryKey: 'id',
});
}
}
@bindThis
public async searchNote(q: string, me: User | null, opts: {
userId?: Note['userId'] | null;
channelId?: Note['channelId'] | null;
}, pagination: {
untilId?: Note['id'];
sinceId?: Note['id'];
limit?: number;
}): Promise<Note[]> {
if (this.meilisearch) {
const filter: Q = {
op: 'and',
qs: [],
};
if (pagination.untilId) filter.qs.push({ op: '<', k: 'createdAt', v: this.idService.parse(pagination.untilId).date.getTime() });
if (pagination.sinceId) filter.qs.push({ op: '>', k: 'createdAt', v: this.idService.parse(pagination.sinceId).date.getTime() });
if (opts.userId) filter.qs.push({ op: '=', k: 'userId', v: opts.userId });
if (opts.channelId) filter.qs.push({ op: '=', k: 'channelId', v: opts.channelId });
const res = await this.meilisearchNoteIndex!.search(q, {
sort: ['createdAt:desc'],
matchingStrategy: 'all',
attributesToRetrieve: ['id', 'createdAt'],
filter: compileQuery(filter),
limit: pagination.limit,
});
if (res.hits.length === 0) return [];
return await this.notesRepository.findBy({
id: In(res.hits.map(x => x.id)),
});
} else {
const query = this.queryService.makePaginationQuery(this.notesRepository.createQueryBuilder('note'), pagination.sinceId, pagination.untilId);
if (opts.userId) {
query.andWhere('note.userId = :userId', { userId: opts.userId });
} else if (opts.channelId) {
query.andWhere('note.channelId = :channelId', { channelId: opts.channelId });
}
query
.andWhere('note.text ILIKE :q', { q: `%${ sqlLikeEscape(q) }%` })
.innerJoinAndSelect('note.user', 'user')
.leftJoinAndSelect('note.reply', 'reply')
.leftJoinAndSelect('note.renote', 'renote')
.leftJoinAndSelect('reply.user', 'replyUser')
.leftJoinAndSelect('renote.user', 'renoteUser');
this.queryService.generateVisibilityQuery(query, me);
if (me) this.queryService.generateMutedUserQuery(query, me);
if (me) this.queryService.generateBlockedUserQuery(query, me);
return await query.take(pagination.limit).getMany();
}
}
}
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