245 lines
7.7 KiB
Dart
245 lines
7.7 KiB
Dart
import 'dart:async';
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import 'dart:convert';
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import 'package:common_utils/common_utils.dart';
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import 'package:flutter/services.dart';
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import 'package:flutter/widgets.dart';
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import 'package:pj_supermarket_cloud/common/index.dart';
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class BarcodeScanManage {
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static const String _tag = "条码扫描管理";
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BarcodeScanManage._privateConstructor();
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static final BarcodeScanManage _instance =
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BarcodeScanManage._privateConstructor();
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static BarcodeScanManage get instance => _instance;
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// 添加白名单焦点节点列表
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final Set<FocusNode> _whitelistNodes = {};
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bool _isListening = false;
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final _buffer = StringBuffer();
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Timer? _timer;
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// 二维码扫码结果
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StreamController<String>? _qrcodeScanController;
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Stream<String> get qrcodeScanStream {
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_qrcodeScanController ??= StreamController<String>.broadcast();
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return _qrcodeScanController!.stream;
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}
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// 扫码枪扫码结果
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StreamController<String>? _gunScanController;
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Stream<String> get gunScanStream {
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_gunScanController ??= StreamController<String>.broadcast();
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return _gunScanController!.stream;
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}
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// 添加白名单焦点
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void addWhitelistNode(FocusNode node) {
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_whitelistNodes.add(node);
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}
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// 移除白名单焦点
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void removeWhitelistNode(FocusNode node) {
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_whitelistNodes.remove(node);
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}
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// 开始监听USB读头输入
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void startListening() {
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if (_isListening) return;
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if (_qrcodeScanController?.isClosed ?? true) {
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_qrcodeScanController = StreamController<String>.broadcast();
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}
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if (_gunScanController?.isClosed ?? true) {
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_gunScanController = StreamController<String>.broadcast();
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}
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if (AppRuntimeTool.useManualHardwareInput) return;
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_isListening = true;
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// 只有当当前焦点不在白名单中时才取消焦点
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final currentFocus = FocusManager.instance.primaryFocus;
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if (currentFocus != null && !_whitelistNodes.contains(currentFocus)) {
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currentFocus.unfocus();
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}
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HardwareKeyboard.instance.addHandler(_handleKeyEvent);
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}
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/// 人工提交二维码结果，继续复用真实扫码后的业务订阅。
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void addManualQrCode(String code) {
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if (code.trim().isEmpty) return;
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_qrcodeScanController ??= StreamController<String>.broadcast();
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_qrcodeScanController?.add(code.trim());
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}
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/// 人工提交商品条码或付款码，继续复用扫码枪业务订阅。
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void addManualGunCode(String code) {
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if (code.trim().isEmpty) return;
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_gunScanController ??= StreamController<String>.broadcast();
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_gunScanController?.add(code.trim());
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}
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// 停止监听
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void stopListening() {
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if (!_isListening) return;
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HardwareKeyboard.instance.removeHandler(_handleKeyEvent);
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_timer?.cancel();
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_isListening = false;
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logger.i("|$_tag|停止监听USB读头输入");
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}
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// 处理键盘事件
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bool _handleKeyEvent(KeyEvent event) {
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final currentFocus = FocusManager.instance.primaryFocus;
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if (currentFocus != null && _whitelistNodes.contains(currentFocus)) {
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return false;
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}
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FocusManager.instance.primaryFocus?.unfocus();
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if (event is! KeyDownEvent) return false;
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try {
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_timer?.cancel();
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// 处理回车键，表示扫码结束
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if (event.logicalKey.keyId == 0x10000000d) {
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if (_buffer.isNotEmpty) {
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final result = _buffer.toString();
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logger.i("|$_tag|扫码结果: $result");
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result.length == 32
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? _qrcodeScanController?.add(result)
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: _gunScanController?.add(result);
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_buffer.clear();
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return true;
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}
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}
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final character = _getCharacter(event);
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if (character != null) {
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_buffer.write(character);
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// 设置超时定时器，如果超过一定时间没有新输入，则清空缓冲区
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_timer = Timer(Duration(milliseconds: 100), () {
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if (_buffer.isNotEmpty) {
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_buffer.clear();
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}
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});
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return true;
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}
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return false;
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} catch (e, stack) {
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logger.e("|$_tag|处理键盘事件错误error|$e|stack|$stack|");
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_buffer.clear();
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_timer?.cancel();
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return false;
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}
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}
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// 从键盘事件中获取字符
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String? _getCharacter(KeyEvent event) {
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// 处理数字键
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if (event.logicalKey.keyId >= LogicalKeyboardKey.digit0.keyId &&
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event.logicalKey.keyId <= LogicalKeyboardKey.digit9.keyId) {
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return String.fromCharCode(
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event.logicalKey.keyId - LogicalKeyboardKey.digit0.keyId + 48);
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}
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// 处理小写字母键
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if (event.logicalKey.keyId >= LogicalKeyboardKey.keyA.keyId &&
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event.logicalKey.keyId <= LogicalKeyboardKey.keyZ.keyId) {
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final isShiftPressed = HardwareKeyboard.instance.isShiftPressed;
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final charCode = event.logicalKey.keyId -
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LogicalKeyboardKey.keyA.keyId +
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(isShiftPressed ? 65 : 97);
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return String.fromCharCode(charCode);
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}
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// 处理其他常见字符
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switch (event.logicalKey) {
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case LogicalKeyboardKey.minus:
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return HardwareKeyboard.instance.isShiftPressed ? '_' : '-';
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case LogicalKeyboardKey.equal:
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return HardwareKeyboard.instance.isShiftPressed ? '+' : '=';
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case LogicalKeyboardKey.bracketLeft:
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return '[';
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case LogicalKeyboardKey.bracketRight:
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return ']';
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case LogicalKeyboardKey.backslash:
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return '\\';
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case LogicalKeyboardKey.semicolon:
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return ';';
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case LogicalKeyboardKey.quote:
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return '\'';
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case LogicalKeyboardKey.comma:
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return ',';
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case LogicalKeyboardKey.period:
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return '.';
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case LogicalKeyboardKey.slash:
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return HardwareKeyboard.instance.isShiftPressed ? '?' : '/';
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case LogicalKeyboardKey.add:
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return '+';
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case LogicalKeyboardKey.underscore:
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return '_';
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default:
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return null;
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}
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}
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// 尝试解码 base64 字符串
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Future<ServiceQRCode?> getCodeInfo(String str) async {
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try {
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// 根据短码查询
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final pa = {"shortCode": str};
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final encryptString = await WalletApi.getByShortCode(pa);
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if (ObjectUtil.isEmpty(encryptString)) {
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logger.e("|$_tag|getByShortCode错误shortCode|$str|");
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await TtsManage.speak("扫码失败请重试");
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return null;
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}
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final json = EncryptUtil.decodeBase64(encryptString!);
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if (ObjectUtil.isEmpty(json)) {
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logger.e("|$_tag|二维码base64解析错误|$json|");
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await TtsManage.speak("扫码失败请重试");
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return null;
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}
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final qrCode = ServiceQRCode.fromJson(jsonDecode(json));
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if (ObjectUtil.isEmpty(qrCode)) {
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logger.e("|$_tag|无效的二维码,json|$json|");
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await TtsManage.speak("无效的二维码");
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return null;
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}
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// 支付方式
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if (ObjectUtil.isEmpty(qrCode.payType) ||
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ObjectUtil.isEmpty(qrCode.orderType)) {
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logger.e("|$_tag|无效的二维码,支付方式或者订单类型错误,json|$json|");
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await TtsManage.speak("无效的二维码");
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return null;
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}
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TtsManage.speak("扫码成功");
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return qrCode;
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} catch (e) {
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logger.e("|$_tag|二维码解析意外的错误: $e");
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await TtsManage.speak("扫码失败请重试");
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return null;
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}
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}
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// 尝试解析 JSON
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Map<String, dynamic>? parseJson(String jsonStr) {
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try {
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return json.decode(jsonStr) as Map<String, dynamic>;
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} catch (e) {
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logger.e("|$_tag|JSON解析错误: $e");
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return null;
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}
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}
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// 释放资源
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void dispose() {
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stopListening();
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_qrcodeScanController?.close();
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_gunScanController?.close();
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}
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void disposeQrCodeScan() {
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_qrcodeScanController?.close();
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}
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void disposeGunScan() {
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_gunScanController?.close();
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}
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}
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