print-utils/index.js

import { getPrinters, print } from './print.js'

import express from 'express'
import cors from 'cors'
import bodyParser from 'body-parser'
import multer from 'multer'

const app = express()
const port = 1903

const upload = multer({ dest: 'uploads/' })

const debug = process.argv.includes('--debug')

if (debug) {
    console.log('Running in debug mode')
}

app.use(cors())
app.use(bodyParser.json())
app.use(bodyParser.urlencoded({ extended: true }))

app.get('/', (req, res) => {
    res.send('Hello World!')
})

app.get('/printers', async (req, res) => {
    const printerList = []

    if (debug) {
        printerList.push({
            default: false,
            format: 'PDF',
            id: 'Fake Printer',
            name: 'Fake Printer',
        })
    }

    try {
        const printers = await getPrinters()
        printerList.push(...printers.map(printer => {
            return {
                default: false,
                format: 'PDF',
                id: printer.printer || printer.deviceId,
                name: printer.printer || printer.name,
            }
        }))
    } catch (e) {
        console.error('Error getting printers', e)
    }

    return res.json(printerList)
})

app.post('/printers/:printer/print', upload.single('file'), async (req, res) => {
    const { printer } = req.params

    // query: user-id: string, docType: label
    // form data: file: binary, copies: string, shipment-ids: string

    if (printer === 'Fake Printer') {
        return res.json({
            jobs: ['0'],
        })
    }

    try {
        const fileToPrint = req.file.path
        const printJob = await print(fileToPrint, printer)
        const jobId = getRequestId(printJob)

        return res.json({
            jobs: [jobId],
        })
    } catch (e) {
        console.error('Error printing', e)
        return res.status(400).json({
            error: 'Unsuccessful print job: ' + e.message,
            error_id: null,
        })
    }
})

app.listen(port, () => {
    console.log(`App listening on port ${port}`)
})

function getRequestId(printJob) {
    if (printJob === undefined) {
        return '0'
    }

    const requestId = printJob.stdout.split(' ')[3]
    return requestId.split('-')[1]
}