Generate Meetup labels

label-color.js

const username = process.argv[2]
const type = process.argv[3] || 1

const sharp = require('sharp')
const QRCode = require('qrcode')
const fetch = require('node-fetch')
const printer = require("node-printer-lp-complete")
const printOptions =  {
  media: 'Custom.25x50mm',
  destination: "ColorLabelPrinter",
  portrait: '',
  fitplot: true,
  n: 1
}

const main = async () => {
  console.log('Get avatar')

  const avatarimg = await fetch('http://twivatar.glitch.me/' + username).then(res => res.buffer())

  console.log('Resize avatar')

  const avatar = await sharp(avatarimg)
    .resize(269)
    .toBuffer()

    const canvas = await sharp({
      create: {
        width: 1060,
        height: 560,
        channels: 4,
        background: { r: 0, g: 0, b: 0, alpha: 0.5 }
      }
    })
    .ensureAlpha()
    .overlayWith(avatar, {
      top: 106,
      left: 187
    })
    .png().toBuffer()

  console.log('Merge overlay')

  const images = await sharp(canvas)
    .ensureAlpha()
    .overlayWith('lbl/' + type + '.png', { top: 0, left: 0 })
    .png().toBuffer()

  console.log('Merge text')

  const withtext = await sharp(images)
    .ensureAlpha()
    .overlayWith(Buffer.from(`
      <svg viewBox="0 0 780 300" xmlns="http://www.w3.org/2000/svg">
        <text x="300" y="200" style="text-anchor: middle; font-size: 55px; font-family: Brandon Text; font-weight: bold; fill: white;">@${username}</text>
      </svg>
    `.trim()), { top: 435, left: 20 })
    .png().toBuffer()
    
  console.log('Generate QR')
  const qrimage = await new Promise((resolve, reject) => {
    QRCode.toDataURL('xrptipbot://twitter/' + username, {
      errorCorrectionLevel: 'Q',
      type: 'png',
      margin: 2,
      width: 245,
      color: {
        dark: '#ffffffff',
        light: '#00000000'
      }
    }, (err, url) => {
      if (err) reject(err)
      resolve(Buffer.from(url.split(',')[1], 'base64'))
    })
  })
    
  console.log('Write output')

  const output = await sharp(withtext)
    .overlayWith(qrimage, { top: 122, left: 684 })
    .png()
    .toFile('lbl/output.png')

  console.log('Send to printer')

  printer.printFile('lbl/output.png', printOptions, "meetup");

  console.log('Done', output)
}

main()