wikijs-fork/models/search.js
2016-09-06 21:14:29 -04:00

184 lines
3.2 KiB
JavaScript

"use strict";
var Promise = require('bluebird'),
_ = require('lodash'),
path = require('path'),
searchIndex = require('search-index'),
stopWord = require('stopword');
/**
* Search Model
*/
module.exports = {
_si: null,
/**
* Initialize Search model
*
* @param {Object} appconfig The application config
* @return {Object} Search model instance
*/
init(appconfig) {
let self = this;
let dbPath = path.resolve(ROOTPATH, appconfig.datadir.db, 'search-index');
searchIndex({
deletable: true,
fieldedSearch: true,
indexPath: dbPath,
logLevel: 'error',
stopwords: stopWord.getStopwords(appconfig.lang).sort()
}, (err, si) => {
if(err) {
winston.error('Failed to initialize search-index.', err);
} else {
self._si = Promise.promisifyAll(si);
}
});
return self;
},
find(terms) {
let self = this;
terms = _.chain(terms)
.deburr()
.toLower()
.trim()
.replace(/[^a-z0-9 ]/g, '')
.value();
let arrTerms = _.chain(terms)
.split(' ')
.filter((f) => { return !_.isEmpty(f); })
.value();
return self._si.searchAsync({
query: {
AND: [{ '*': arrTerms }]
},
pageSize: 10
}).get('hits').then((hits) => {
if(hits.length < 5) {
return self._si.matchAsync({
beginsWith: terms,
threshold: 3,
limit: 5,
type: 'simple'
}).then((matches) => {
return {
match: hits,
suggest: matches
};
});
} else {
return {
match: hits,
suggest: []
};
}
}).catch((err) => {
if(err.type === 'NotFoundError') {
return {
match: [],
suggest: []
};
} else {
winston.error(err);
}
});
},
/**
* Add a document to the index
*
* @param {Object} content Document content
* @return {Promise} Promise of the add operation
*/
add(content) {
let self = this;
return self._si.searchAsync({
query: {
AND: [{ 'entryPath': [content.entryPath] }]
}
}).then((results) => {
if(results.totalHits > 0) {
let delIds = _.map(results.hits, 'id');
return self._si.delAsync(delIds);
} else {
return true;
}
}).catch((err) => {
if(err.type === 'NotFoundError') {
return true;
} else {
winston.error(err);
}
}).then(() => {
return self._si.addAsync({
entryPath: content.entryPath,
title: content.meta.title,
subtitle: content.meta.subtitle || '',
parent: content.parent.title || '',
content: content.text || ''
}, {
fieldOptions: [{
fieldName: 'entryPath',
searchable: true,
weight: 2
},
{
fieldName: 'title',
nGramLength: [1, 2],
searchable: true,
weight: 3
},
{
fieldName: 'subtitle',
searchable: true,
weight: 1,
store: false
},
{
fieldName: 'parent',
searchable: false,
},
{
fieldName: 'content',
searchable: true,
weight: 0,
store: false
}]
}).then(() => {
winston.info('Entry ' + content.entryPath + ' added/updated to index.');
return true;
}).catch((err) => {
winston.error(err);
});
}).catch((err) => {
winston.error(err);
});
}
};