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const bunyan = require('bunyan')
const level = require('levelup')
const down = require('memdown')
const SearchIndexAdder = require('search-index-adder')
const SearchIndexSearcher = require('search-index-searcher')
module.exports = function (givenOptions, moduleReady) {
const optionsLoaded = function (err, SearchIndex) {
const siUtil = require('./siUtil.js')(SearchIndex.options)
if (err) return moduleReady(err)
SearchIndex.close = siUtil.close
SearchIndex.countDocs = siUtil.countDocs
getAdder(SearchIndex, adderLoaded)
}
const adderLoaded = function (err, SearchIndex) {
if (err) return moduleReady(err)
getSearcher(SearchIndex, searcherLoaded)
}
const searcherLoaded = function (err, SearchIndex) {
if (err) return moduleReady(err)
return moduleReady(err, SearchIndex)
}
getOptions(givenOptions, optionsLoaded)
}
const getAdder = function (SearchIndex, done) {
SearchIndexAdder(SearchIndex.options, function (err, searchIndexAdder) {
SearchIndex.add = searchIndexAdder.add
SearchIndex.callbackyAdd = searchIndexAdder.concurrentAdd // deprecated
SearchIndex.concurrentAdd = searchIndexAdder.concurrentAdd
SearchIndex.createWriteStream = searchIndexAdder.createWriteStream
SearchIndex.dbWriteStream = searchIndexAdder.dbWriteStream
SearchIndex.defaultPipeline = searchIndexAdder.defaultPipeline
SearchIndex.del = searchIndexAdder.deleter
SearchIndex.deleteStream = searchIndexAdder.deleteStream
SearchIndex.flush = searchIndexAdder.flush
done(err, SearchIndex)
})
}
const getSearcher = function (SearchIndex, done) {
SearchIndexSearcher(SearchIndex.options, function (err, searchIndexSearcher) {
SearchIndex.availableFields = searchIndexSearcher.availableFields
SearchIndex.buckets = searchIndexSearcher.bucketStream
SearchIndex.categorize = searchIndexSearcher.categoryStream
SearchIndex.dbReadStream = searchIndexSearcher.dbReadStream
SearchIndex.get = searchIndexSearcher.get
SearchIndex.match = searchIndexSearcher.match
SearchIndex.scan = searchIndexSearcher.scan
SearchIndex.search = searchIndexSearcher.search
SearchIndex.totalHits = searchIndexSearcher.totalHits
done(err, SearchIndex)
})
}
const getOptions = function (options, done) {
var SearchIndex = {}
SearchIndex.options = Object.assign({}, {
indexPath: 'si',
keySeparator: '○',
logLevel: 'error'
}, options)
options.log = bunyan.createLogger({
name: 'search-index',
level: options.logLevel
})
if (!options.indexes) {
level(SearchIndex.options.indexPath || 'si', {
valueEncoding: 'json',
db: down
}, function (err, db) {
SearchIndex.options.indexes = db
return done(err, SearchIndex)
})
} else {
return done(null, SearchIndex)
}
}