144 lines
3.8 KiB
Dart
144 lines
3.8 KiB
Dart
import 'dart:async';
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import 'dart:typed_data';
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import 'package:flutter/material.dart';
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import 'package:hub/flutter_flow/flutter_flow_model.dart';
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import 'package:hub/pages/qr_code_page/qr_code_page_widget.dart';
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import 'package:hub/shared/helpers/db_helper.dart';
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import 'package:qr_flutter/qr_flutter.dart';
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class QrCodePageModel extends FlutterFlowModel<QrCodePageWidget> {
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/// Local state fields for this page.
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bool isAccess = false;
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String? key = null;
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DateTime? time;
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final DatabaseHelper db = DatabaseHelper();
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late final bool isFingerprint;
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late final String userDevUUID;
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/// State fields for stateful widgets in this page.
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final unfocusNode = FocusNode();
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@override
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void initState(BuildContext context) {
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initVariable();
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}
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Future<void> initVariable() async {
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isFingerprint = await db
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.get(key: 'fingerprint', field: 'value')
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.then((value) => value.toString() == 'true');
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userDevUUID = await db
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.get(key: 'userDevUUID', field: 'value')
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.then((value) => value.toString());
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}
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@override
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void dispose() {
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unfocusNode.dispose();
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}
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Uint8List assembleQRPacket(
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int direction, String identifier, String password) {
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List<int> packet = [direction];
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String paddedBadge = identifier.padLeft(30, '0');
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for (var i = 0; i < paddedBadge.length; i += 2) {
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packet.add(int.parse(paddedBadge.substring(i, i + 2), radix: 16));
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}
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DateTime now = DateTime.now();
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int year = now.year % 100;
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int month = now.month;
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int day = now.day;
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int hour = now.hour;
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int minute = now.minute;
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int sum = year + month + day + hour + minute;
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if (sum == int.parse('0D', radix: 16) ||
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sum == int.parse('0A', radix: 16)) {
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packet.add(int.parse('FF', radix: 16));
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} else {
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packet.add(sum);
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}
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String paddedPassword = password.length != 4 ? 'FFFF' : password;
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for (var i = 0; i < paddedPassword.length; i += 2) {
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packet.add(int.parse(paddedPassword.substring(i, i + 2), radix: 16));
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}
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int check = 0x00;
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for (var b in packet) {
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check ^= b;
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}
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if (check == int.parse('0D', radix: 16) ||
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check == int.parse('0A', radix: 16)) {
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packet.add(int.parse('FF', radix: 16));
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} else {
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packet.add(check);
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}
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var bytes = packet
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.map((byte) => byte.toRadixString(16).padLeft(2, '0'))
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.join((' '));
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return Uint8List.fromList(packet);
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}
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Uint8List hexStringToByteArray(String s) {
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int len = s.length;
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Uint8List data = Uint8List(len ~/ 2);
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for (int i = 0; i < len; i += 2) {
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data[i ~/ 2] =
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((int.parse(s[i], radix: 16) << 4) + int.parse(s[i + 1], radix: 16));
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}
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return data;
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}
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String byteToHexa(Uint8List pDados) {
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return pDados
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.map((byte) => byte.toRadixString(16).padLeft(2, '0').toUpperCase())
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.join();
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}
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Future<String> byteToString(Uint8List bytes) async {
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return String.fromCharCodes(bytes);
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}
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Widget buildQrCode(
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{required int errorCorrectLevel,
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required double dimension,
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required String identifier,
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required String pass,
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required int direction}) {
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try {
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const Color backgroundColor = Colors.white;
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const Color foregroundColor = Colors.black;
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return QrImageView.withQr(
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qr: QrCode.fromUint8List(
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data: assembleQRPacket(direction, identifier, pass),
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errorCorrectLevel: errorCorrectLevel),
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size: dimension,
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padding: const EdgeInsets.all(10),
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backgroundColor: backgroundColor,
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foregroundColor: foregroundColor);
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} catch (e) {
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return Text("Erro ao gerar QR Code: ${e.toString()}");
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}
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}
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/// Action blocks.
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Future qrCodeEncoder(
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BuildContext context, {
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required String? key,
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}) async {}
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}
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