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/**
* Module dependencies
*/
import * as mongo from 'mongodb';
import $ from 'cafy';
const escapeRegexp = require('escape-regexp');
import Post from '../../models/post';
import serialize from '../../serializers/post';
import config from '../../../conf';
/**
* Search a post
*
* @param {any} params
* @param {any} me
* @return {Promise<any>}
*/
module.exports = (params, me) => new Promise(async (res, rej) => {
// Get 'query' parameter
const [query, queryError] = $(params.query).string().pipe(x => x != '').$;
if (queryError) return rej('invalid query param');
// Get 'offset' parameter
const [offset = 0, offsetErr] = $(params.offset).optional.number().min(0).$;
if (offsetErr) return rej('invalid offset param');
// Get 'max' parameter
const [max = 10, maxErr] = $(params.max).optional.number().range(1, 30).$;
if (maxErr) return rej('invalid max param');
// If Elasticsearch is available, search by $
// If not, search by MongoDB
(config.elasticsearch.enable ? byElasticsearch : byNative)
(res, rej, me, query, offset, max);
});
// Search by MongoDB
async function byNative(res, rej, me, query, offset, max) {
const escapedQuery = escapeRegexp(query);
// Search posts
const posts = await Post
.find({
text: new RegExp(escapedQuery)
}, {
sort: {
_id: -1
},
limit: max,
skip: offset
});
// Serialize
res(await Promise.all(posts.map(async post =>
await serialize(post, me))));
}
// Search by Elasticsearch
async function byElasticsearch(res, rej, me, query, offset, max) {
const es = require('../../db/elasticsearch');
es.search({
index: 'misskey',
type: 'post',
body: {
size: max,
from: offset,
query: {
simple_query_string: {
fields: ['text'],
query: query,
default_operator: 'and'
}
},
sort: [
{ _doc: 'desc' }
],
highlight: {
pre_tags: ['<mark>'],
post_tags: ['</mark>'],
encoder: 'html',
fields: {
text: {}
}
}
}
}, async (error, response) => {
if (error) {
console.error(error);
return res(500);
}
if (response.hits.total === 0) {
return res([]);
}
const hits = response.hits.hits.map(hit => new mongo.ObjectID(hit._id));
// Fetch found posts
const posts = await Post
.find({
_id: {
$in: hits
}
}, {
sort: {
_id: -1
}
});
posts.map(post => {
post._highlight = response.hits.hits.filter(hit => post._id.equals(hit._id))[0].highlight.text[0];
});
// Serialize
res(await Promise.all(posts.map(async post =>
await serialize(post, me))));
});
}
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