新增添加网口打印机

electron/main.js

@@ -5,6 +5,7 @@ import axios from "axios";
 import os from "os";
 import fs from "fs";
 import { exec } from "child_process";
+import { printReceipt } from "./printService";
 
 // ===== 核心配置：单文件缓存 =====
 // 固定的缓存文件路径（永远只存这1个文件）
@@ -106,6 +107,19 @@ app.whenReady().then(() => {
       });
   });
 
+  ipcMain.on('networkPrint', async (event, arg) => {
+    try {
+      let _parmas = JSON.parse(arg);
+      console.log(_parmas);
+      console.log(_parmas.orderData.carts);
+      await printReceipt(_parmas.printerIp, _parmas.orderData);
+      return { ok: true }
+    } catch (e) {
+      console.log(e);
+      return { ok: false, msg: e.message }
+    }
+  })
+
   app.on("activate", () => {
     // 在 macOS 系统内, 如果没有已开启的应用窗口
     // 点击托盘图标时通常会重新创建一个新窗口

electron/printService.js

@@ -0,0 +1,100 @@
+import net from 'net'
+import iconv from 'iconv-lite'
+
+export function printReceipt(printerIp, order) {
+    return new Promise((resolve) => {
+        const socket = new net.Socket()
+        socket.setTimeout(8000)
+
+        socket.connect(9100, printerIp, () => {
+            // 打印机复位
+            socket.write(Buffer.from([0x1B, 0x40]))
+
+            // ==========================================
+            // 全局配置：58mm 一行固定 32 个字符
+            // ==========================================
+            const lineWidth = 32
+            const line = '================================'.substring(0, lineWidth)
+            const lineMin = '--------------------------------'.substring(0, lineWidth)
+
+            // 居中函数
+            const center = (str) => {
+                const s = String(str)
+                const len = s.length
+                const pad = Math.max(0, Math.floor((lineWidth - len) / 2))
+                return ' '.repeat(pad) + s + '\n'
+            }
+
+            // ==========================================
+            // 标题：店名 + 结算单 + 桌号 → 全部居中对齐
+            // ==========================================
+            socket.write(Buffer.from([0x1B, 0x21, 0x11])) // 放大店名
+            socket.write(iconv.encode(center(order.shop_name), 'gbk'))
+            socket.write(Buffer.from([0x1B, 0x21, 0x00])) // 恢复正常
+
+            socket.write(iconv.encode(center(`结算单 #${order.orderInfo.orderNum}`), 'gbk'))
+            socket.write(iconv.encode(center(`桌号：${order.orderInfo.tableName || ''}`), 'gbk'))
+            socket.write(iconv.encode(line + '\n', 'gbk'))
+
+            // ==========================================
+            // 订单信息（全部撑满宽度）
+            // ==========================================
+            let content = ''
+            content += `订单号：${order.orderInfo.orderNo}\n`
+            content += `交易时间：${order.createdAt}\n`
+            content += `收银员：${order.loginAccount}\n`
+            content += lineMin + '\n'
+
+            // ==========================================
+            // 商品表格：完全对齐、撑满宽度
+            // ==========================================
+            content += '品名      单价      数量     小计\n'
+            content += lineMin + '\n'
+
+            order.carts.forEach(item => {
+                let name = String(item.name || '').substring(0, 10).padEnd(10, ' ')
+                let price = String(item.salePrice || '0.00').padStart(6, ' ')
+                let num = String(item.number || 1).padStart(3, ' ')
+                let total = String(item.totalAmount || '0.00').padStart(3, ' ')
+                content += name + price + num + total + '\n'
+            })
+
+            content += lineMin + '\n'
+
+            // ==========================================
+            // 金额信息
+            // ==========================================
+            content += `原价：${order.originAmount}\n`
+            content += `折扣：${order.discountAllAmount}\n`
+
+            // 发送前面内容
+            socket.write(iconv.encode(content, 'gbk'))
+
+            // 实付放大
+            socket.write(Buffer.from([0x1B, 0x21, 0x11]))
+            socket.write(iconv.encode(`实付：${order.orderAmount}\n`, 'gbk'))
+            socket.write(Buffer.from([0x1B, 0x21, 0x00]))
+
+            // 底部信息
+            let bottom = ''
+            bottom += `备注：${order.remark || '无'}\n`
+            bottom += `打印时间：${order.printTime}\n`
+            bottom += line + '\n'
+            bottom += '\n\n\n\n\n\n'
+
+            socket.write(iconv.encode(bottom, 'gbk'))
+
+            // 只切纸一次
+            socket.write(Buffer.from([0x1D, 0x56, 0x00]))
+
+            setTimeout(() => {
+                socket.end()
+                resolve('ok')
+            }, 400)
+        })
+
+        socket.on('error', () => { })
+        socket.on('close', () => { })
+        socket.on('timeout', () => socket.destroy())
+    })
+}