盘库操作初设计

inventory-backend/app/services/print/network_print_service.py

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+import socket
+import datetime
+
+
+class NetworkPrintService:
+    def __init__(self, ip='192.168.9.205', port=9100):
+        """
+        初始化网络打印机服务
+        :param ip: 打印机IP，默认 192.168.9.205
+        :param port: 端口，默认 9100
+        """
+        self.ip = ip
+        self.port = port
+
+    def _send_to_printer(self, content):
+        """底层发送方法"""
+        try:
+            # 建立 Socket 连接
+            with socket.socket(socket.socket.AF_INET, socket.socket.SOCK_STREAM) as s:
+                s.settimeout(5)  # 设置5秒超时
+                s.connect((self.ip, self.port))
+
+                # 发送内容，使用 GB18030 编码以支持中文
+                s.sendall(content.encode('gb18030'))
+
+                # 发送切纸指令 (ESC/POS: GS V m)
+                # 十六进制: 1D 56 42 00
+                s.sendall(b'\x1d\x56\x42\x00')
+
+            return True, "打印成功"
+        except Exception as e:
+            print(f"[NetworkPrint Error] {str(e)}")
+            return False, f"打印失败: {str(e)}"
+
+    def print_outbound_selection(self, items):
+        """
+        打印出库选单 (拣货单)
+        :param items: 选中的物品列表
+        """
+        timestamp = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
+
+        lines = []
+        lines.append("\n")
+        lines.append("********************************")
+        lines.append("        出库拣货确认单          ")
+        lines.append("********************************")
+        lines.append(f"打印时间: {timestamp}")
+        lines.append(f"待出库总数: {len(items)} 件")
+        lines.append("--------------------------------")
+        lines.append(f"{'名称':<14}{'规格/批号':<10}")
+        lines.append("--------------------------------")
+
+        for item in items:
+            # 获取名称，优先取 material_name, 其次 product_name
+            name = item.get('material_name') or item.get('product_name') or "未知物品"
+            if len(name) > 14: name = name[:13] + "."  # 名称过长截断
+
+            standard = item.get('standard', '')
+            batch = item.get('batch_no', '')
+            uuid = item.get('uuid', '')[-6:]  # 只显示UUID后6位
+
+            lines.append(f"{name:<14} {standard}")
+            lines.append(f"批号: {batch} | 尾号: {uuid}")
+            lines.append("- - - - - - - - - - - - - - - -")
+
+        lines.append("\n")
+        lines.append("库管员签字: ______________")
+        lines.append("领料人签字: ______________")
+        lines.append("\n\n\n")  # 走纸
+
+        content = "\n".join(lines)
+        return self._send_to_printer(content)
+
+    def print_stocktake_report(self, data):
+        """
+        打印盘点统计报告
+        :param data: 包含 total, scanned, missing, missing_items
+        """
+        total = data.get('total', 0)
+        scanned = data.get('scanned', 0)
+        missing = data.get('missing', 0)
+        missing_items = data.get('missing_items', [])
+        timestamp = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
+
+        lines = []
+        lines.append("\n")
+        lines.append("================================")
+        lines.append("       库存盘点统计报告        ")
+        lines.append("================================")
+        lines.append(f"盘点时间: {timestamp}")
+        lines.append(f"应盘总数: {total}")
+        lines.append(f"实盘(已扫): {scanned}")
+        lines.append(f"差异(未扫): {missing}")
+        lines.append("--------------------------------")
+
+        if missing == 0:
+            lines.append("【结果】: 账实相符，库存完美！")
+        else:
+            lines.append("【差异明细 (未扫码物品)】:")
+            for item in missing_items:
+                name = item.get('material_name') or item.get('product_name') or "未知"
+                batch = item.get('batch_no', '-')
+                # 兼容不同模型的字段
+                code = item.get('uuid', item.get('bar_code', 'N/A'))[-6:]
+
+                lines.append(f"[ ] {name}")
+                lines.append(f"    批:{batch} 码:{code}")
+
+        lines.append("\n")
+        lines.append("监盘人: ______________")
+        lines.append("\n\n\n")
+
+        content = "\n".join(lines)
+        return self._send_to_printer(content)