89 lines
2.7 KiB
JavaScript
89 lines
2.7 KiB
JavaScript
const db = require('../db')
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const state = require('./state')
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const newSettingsLoader = require('../new-settings-loader')
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const logger = require('../logger')
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db.connect({ direct: true })
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.then(sco => {
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sco.client.on('notification', () => reloadCache())
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return sco.none('LISTEN reload')
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})
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.catch(console.error)
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db.connect({ direct: true })
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.then(sco => {
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sco.client.on('notification', data => {
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const parsedData = JSON.parse(data.payload)
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return machineAction(parsedData.action, parsedData.value)
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})
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return sco.none('LISTEN machineAction')
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})
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.catch(console.error)
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function machineAction(type, value) {
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const deviceId = value.deviceId
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const pid = state.pids?.[deviceId]?.pid
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switch (type) {
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case 'reboot':
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logger.debug(`Rebooting machine '${deviceId}'`)
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state.reboots[deviceId] = pid
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break
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case 'shutdown':
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logger.debug(`Shutting down machine '${deviceId}'`)
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state.shutdowns[deviceId] = pid
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break
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case 'restartServices':
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logger.debug(`Restarting services of machine '${deviceId}'`)
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state.restartServicesMap[deviceId] = pid
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break
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case 'emptyUnit':
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logger.debug(`Emptying units from machine '${deviceId}'`)
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state.emptyUnit[deviceId] = pid
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break
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case 'refillUnit':
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logger.debug(`Refilling recyclers from machine '${deviceId}'`)
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state.refillUnit[deviceId] = pid
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break
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case 'diagnostics':
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logger.debug(`Running diagnostics on machine '${deviceId}'`)
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state.diagnostics[deviceId] = pid
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break
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default:
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break
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}
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}
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const updateCache = (versionId, settings) => {
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const { settingsCache } = state
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settingsCache.set(settings.version, settings)
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if (!versionId) settingsCache.set('latest', settings)
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return settings
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}
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const reloadCache = async versionId => {
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const settings = await newSettingsLoader.load(versionId)
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return updateCache(versionId, settings)
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}
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const getOrUpdateCached = async versionId =>
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state.settingsCache.get(versionId || 'latest') ||
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(await reloadCache(versionId))
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const populateSettings = function (req, res, next) {
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const versionId = req.headers['config-version']
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// Priority of configs to retrieve
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// 1. Machine is in the middle of a transaction and has the config-version header set, fetch that config from cache or database, depending on whether it exists in cache
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// 2. The operator settings changed, so we must update the cache
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// 3. There's a cached config, send the cached value
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// 4. There's no cached config, cache and send the latest config
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getOrUpdateCached(versionId)
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.then(settings => {
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req.settings = settings
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next()
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})
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.catch(next)
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}
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module.exports = populateSettings
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