65 lines
1.9 KiB
JavaScript
65 lines
1.9 KiB
JavaScript
// Get CORPUS data from Network Rail and format the data for OwlBoard
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// Network Rail Datafeed user and pass must be stored in `/srv/keys/owlboard/keys.config.js`
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// FUNCTIONS/
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// initSubset() : Exported: Uses the internal functions to return a clean CORPUS object.
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// initAll() : Exported: Uses the internal functions to return a full CORPUS object.
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// get() : Get the CORPUS data from Network Rail as a gzip file.
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// extract() : Extract the CORPUS JSON file from the GZIP file.
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// clean() : Cleans the CORPUS data, removing unneccesary non-stations from the data.
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const axios = require('axios')
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const gz = require('node-gzip')
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const corpusUser = process.env.OWL_LDB_CORPUSUSER
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const corpusPass = process.env.OWL_LDB_CORPUSPASS
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async function initSubset(allCorpus) {
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var cleanCorpus = await clean(allCorpus)
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return cleanCorpus
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}
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async function initAll(){
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var gzipData = await get()
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var allCorpus = await extract(gzipData)
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return allCorpus
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}
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async function get() {
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authHead = Buffer.from(`${corpusUser}:${corpusPass}`).toString('base64')
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const url = 'https://datafeeds.networkrail.co.uk/ntrod/SupportingFileAuthenticate?type=CORPUS'
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const options = {
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method: 'get',
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timeout: 20000,
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headers: {'Authorization': `Basic ${authHead}`},
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responseType: 'arraybuffer'
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}
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var { data } = await axios.get(url, options)
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return data
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}
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async function extract(input) {
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var raw = await gz.ungzip(input)
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var obj = await JSON.parse(raw)
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var output = obj.TIPLOCDATA
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return output
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}
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async function clean(input) {
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let clean = [];
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for (const element of input) {
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if (element.STANOX != ' ' && element['3ALPHA'] != ' '){
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delete(element.UIC);
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delete(element.NLCDESC16);
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delete(element.NLC);
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clean.push(element);
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}
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}
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return clean;
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}
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module.exports = {
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initAll,
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initSubset
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} |