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'use strict';
/**
* Module dependencies
*/
import * as mongo from 'mongodb';
const escapeRegexp = require('escape-regexp');
import Post from '../../models/post';
import serialize from '../../serializers/post';
import config from '../../../conf';
/**
* Search a post
*
* @param {Object} params
* @param {Object} me
* @return {Promise<object>}
*/
module.exports = (params, me) =>
new Promise(async (res, rej) =>
{
// Get 'query' parameter
let query = params.query;
if (query === undefined || query === null || query.trim() === '') {
return rej('query is required');
}
// Get 'offset' parameter
let offset = params.offset;
if (offset !== undefined && offset !== null) {
offset = parseInt(offset, 10);
} else {
offset = 0;
}
// Get 'max' parameter
let max = params.max;
if (max !== undefined && max !== null) {
max = parseInt(max, 10);
// From 1 to 30
if (!(1 <= max && max <= 30)) {
return rej('invalid max range');
}
} else {
max = 10;
}
// If Elasticsearch is available, search by it
// 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));
// Fetxh 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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