ble-server/route/dashboard.js

/* eslint-disable no-throw-literal */
/* eslint-disable */
const KoaRouter = require('koa-router')
const router = new KoaRouter()
const fs = require('fs')
const path = require('path')
const Printer = require('../PrinterDev')
const KoaBody = require('koa-body')
const uuid = require('uuid')
const config = require('../config.json')
/* eslint-enable */

router.use(async (c, n) => {
  c.data = {
    title: 'Printer System Dashboard'
  }
  let status = 1
  try {
    await n()
  } catch (err) {
    status = 0
    if (typeof err === 'string') {
      c.body = err
    } else {
      c.body = err.toString()
    }
  }

  if (c.async) {
    c.body = {
      status,
      msg: c.body
    }
  }
})

router.get('/', async (c, n) => {
  c.data.route = 'index'
  await c.render('dashboard/index', c.data)
})

router.get('/setting', async (c, n) => {
  c.data.route = 'setting'

  let ttys = await new Promise((resolve, reject) => {
    fs.readdir(path.resolve('/dev'), (err, list) => {
      if (err) return resolve([])
      let arr = []
      for (let it of list) {
        if (/^tty[A-z]/.test(it)) {
          arr.push(path.resolve('/dev', it))
        }
      }
      resolve(arr)
    })
  })
  c.data.ttys = ttys

  c.data.defConfig = config

  await c.render('dashboard/index', c.data)
})

router.post('/api/print', KoaBody(), async (c, n) => {
  c.async = true
  let arr = c.request.body
  if (!arr.data) throw 'print data empty'
  if (config.api.secret && !arr.key) throw 'access key enpty'
  if (config.api.secret !== arr.key.trim()) throw 'access key error'

  let status = await Printer.printerString(arr.data)

  if (!status) throw 'printer fail'

  c.body = 'print success'
})

  .post('/api/printer_test', KoaBody(), async (c, n) => {
    c.async = true
    let arr = c.request.body
    if (!arr.device) throw '請輸入印表機連接埠'
    let device = arr.device
    let feed = arr.feed || 8
    if (!isFinite(feed) || feed < 0) throw '切紙前換行必須是整數'
    feed = typeof feed !== 'number' ? Math.floor(parseInt(feed)) : feed

    let oriDev = Printer.serial
    let oriFeed = Printer.feed

    if (Printer.isOpen) {
      await Printer.close()
    }

    Printer.serial = device
    Printer.feed = feed

    let status = await Printer.printTestPage()

    if (!status) c.body = '測試失敗'
    else c.body = '測試成功'

    Printer.serial = oriDev
    Printer.feed = oriFeed
    await Printer.connect()
  })
  .post('/api/write_config', KoaBody(), async (c, n) => {
    c.async = true
    let arr = c.request.body
    if (!arr.tty) throw '請輸入印表機連接埠'
    if (!arr.ble || (arr.ble !== 'yes' && arr.ble !== 'no')) throw '請輸入藍牙啟用設定'
    let feed = arr.feed || 8
    if (!isFinite(feed) || feed < 0) throw '切紙前換行必須是整數'
    feed = typeof feed !== 'number' ? Math.floor(parseInt(feed)) : feed

    let json = Object.assign({}, config)

    json.ble.enable = arr.ble === 'yes'

    json.printer.serial = arr.tty
    json.printer.feed = feed

    json.api.secret = arr.secret || ''

    let wconfig = await new Promise((resolve, reject) => {
      fs.writeFile(path.resolve(process.env.PROJECT_ROOT, 'config.json'), JSON.stringify(json, null, 2), {
        mode: 0o664,
        encoding: 'utf8',
        flag: 'w'
      }, err => {
        if (err) return resolve(false)
        return resolve(true)
      })
    })

    if (!wconfig) throw '設定檔寫入失敗'
    c.body = '設定檔寫入成功'
  })

module.exports = router