加入WebAPI

1.PrinterDev add EventEmitter
2.add Printer WebAPI

PrinterDev.js

@@ -4,8 +4,9 @@ const escpos = require('escpos')
 const fs = require('fs')
 const iconv = require('iconv-lite')
 
-class PrinterDevice {
+class PrinterDevice extends EventEmitter {
   constructor () {
+    super()
     this._serial = ''
     this._feed = 8
     this._isOpen = false
@@ -87,7 +88,7 @@ class PrinterDevice {
 
     this._lastPrint = str
     this.addCount()
-
+    this.emit('printDone')
     return true
   }
 

route/dashboard.js

@@ -37,4 +37,16 @@ router.get('/', async (c, n) => {
   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'
+
+  let status = await Printer.printerString(arr.data)
+
+  if (!status) throw 'printer fail'
+
+  c.body = 'print success'
+})
+
 module.exports = router

server.js

@@ -83,41 +83,51 @@ if (router !== null) {
 }
 
 // listen print event
-localEvent.on('print', str => {
-  Printer.printerString(str)
+localEvent.on('print', async str => {
+  let chk = await Printer.printerString(str)
+  localEvent.emit('printResult', chk)
 })
 
+let systemStatus = {
+  ble: {
+    enable: false,
+    mac: '',
+    service: '',
+    characteristic: ''
+  },
+  printer: {
+    connect: false,
+    serial: '',
+    feed: 0
+  },
+  pcount: 0,
+  lastprint: ''
+}
+
+systemStatus.ble.enable = config.ble.enable
+if (config.ble.enable) {
+  systemStatus.ble.mac = await getBTAddr()
+  systemStatus.ble.service = config.ble.uuid.service
+  systemStatus.ble.characteristic = config.ble.uuid.characteristic
+}
+function getPrinterStatus() {
+  systemStatus.printer.connect = Printer.isOpen
+  systemStatus.printer.serial = Printer.serial
+  systemStatus.printer.feed = Printer.feed
+  systemStatus.pcount = Printer.count
+  systemStatus.lastprint = Printer.lastPrint
+}
+getPrinterStatus()
+
 ws.on('connection', async (client, req) => {
-  let json = {
-    ble: {
-      enable: false,
-      mac: '',
-      service: '',
-      characteristic: ''
-    },
-    printer: {
-      connect: false,
-      serial: '',
-      feed: 0
-    },
-    pcount: 0,
-    lastprint: ''
-  }
 
-  // 第一次連上線推送系統狀態
-  json.ble.enable = config.ble.enable
-  if (config.ble.enable) {
-    json.ble.mac = await getBTAddr()
-    json.ble.service = config.ble.uuid.service
-    json.ble.characteristic = config.ble.uuid.characteristic
-  }
-  json.printer.connect = Printer.isOpen
-  json.printer.serial = Printer.serial
-  json.printer.feed = Printer.feed
-  json.pcount = Printer.count
-  json.lastprint = Printer.lastPrint
+  getPrinterStatus()
+  client.send(JSON.stringify({ type: 'status', data: systemStatus }))
 
-  client.send(JSON.stringify({ type: 'status', data: json }))
+  Printer.on('printDone', () => {
+    getPrinterStatus()
+    client.send(JSON.stringify({ type: 'status', data: systemStatus }))
+  })
 
   client.on('message', msg => {
     let m = {}
@@ -129,7 +139,7 @@ ws.on('connection', async (client, req) => {
 
     switch (m.type) {
       case 'status':
-        client.send(JSON.stringify({ type: 'status', data: json }))
+        client.send(JSON.stringify({ type: 'status', data: systemStatus }))
         break
     }
   })