service.js

const qr = require('qr-image')
const fs = require('fs')
const path = require('path')
const os = require('os')

async function getImage(text) {
  return new Promise((resolve, reject) => {
    const filename = path.join(
      os.tmpdir(),
      `go-cqhttp-node-qrcode-${Date.now()}.png`
    )
    const stream = fs.createWriteStream(filename)
    qr.image(text, {
      type: 'png',
      size: 10,
      margin: 2
    }).pipe(stream)
    stream.on('finish', () =>
      resolve([
        {
          type: 'image',
          data: {
            file: 'file://' + filename
          }
        }
      ])
    )
    stream.on('error', err => {
      console.error('[qrcode]', err)
      resolve([
        {
          type: 'text',
          data: {
            text: '生成二维码失败'
          }
        }
      ])
    })
  })
}

module.exports = {
  getImage
}