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build.js
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build.js
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'use strict'
const fs = require('fs')
const path = require('path')
const tokenize = require('./lib/tokenize')
const stations = require('vbb-stations')
const aliases = require('vbb-common-places/stations')
const buildIndex = require('synchronous-autocomplete/build')
const showError = (err) => {
if (!err) return
console.error(err.stack)
process.exit(1)
}
const writeJSON = (file, data, cb) => {
fs.writeFile(path.join(__dirname, file), JSON.stringify(data), cb)
}
console.info('Collecting search items.')
const items = stations('all')
// https://github.com/mfdz/GTFS-Issues/issues/98
.filter(station => !/^VERWAIST: /.test(station.name))
.map((station) => ({
id: station.id,
name: station.name,
weight: station.weight
}))
for (const alias of Object.keys(aliases)) {
const id = aliases[alias]
const [station] = stations(id)
if (!station) {
console.error(`Alias "${alias}" for unknown station ${id}.`)
continue
}
items.push({
id: station.id,
name: alias,
weight: Math.ceil(station.weight / 2)
})
}
console.info('Computing a search index.')
const {
tokens, scores, weights, nrOfTokens, originalIds
} = buildIndex(tokenize, items)
console.info('Writing the index to disk.')
writeJSON('original-ids.json', originalIds, showError)
writeJSON('tokens.json', tokens, showError)
writeJSON('scores.json', scores, showError)
writeJSON('weights.json', weights, showError)
writeJSON('nr-of-tokens.json', nrOfTokens, showError)