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