93 lines
2.8 KiB
C#
93 lines
2.8 KiB
C#
using System;
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using System.Collections.Generic;
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using Xamarin.Forms;
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namespace Bit.App.Pages
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{
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public partial class ScanPage : BaseContentPage
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{
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private readonly Action<string> _callback;
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private DateTime? _timerStarted = null;
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private TimeSpan _timerMaxLength = TimeSpan.FromMinutes(3);
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public ScanPage(Action<string> callback)
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{
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_callback = callback;
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InitializeComponent();
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_zxing.Options = new ZXing.Mobile.MobileBarcodeScanningOptions
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{
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UseNativeScanning = true,
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PossibleFormats = new List<ZXing.BarcodeFormat> { ZXing.BarcodeFormat.QR_CODE },
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AutoRotate = false,
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TryInverted = true
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};
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if (Device.RuntimePlatform == Device.Android)
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{
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ToolbarItems.RemoveAt(0);
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}
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}
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protected override void OnAppearing()
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{
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base.OnAppearing();
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_zxing.IsScanning = true;
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_timerStarted = DateTime.Now;
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Device.StartTimer(new TimeSpan(0, 0, 2), () =>
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{
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if (_timerStarted == null || (DateTime.Now - _timerStarted) > _timerMaxLength)
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{
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return false;
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}
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_zxing.AutoFocus();
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return true;
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});
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}
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protected override void OnDisappearing()
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{
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_timerStarted = null;
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_zxing.IsScanning = false;
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base.OnDisappearing();
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}
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private void OnScanResult(ZXing.Result result)
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{
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// Stop analysis until we navigate away so we don't keep reading barcodes
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_zxing.IsAnalyzing = false;
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_zxing.IsScanning = false;
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var text = result?.Text;
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if (!string.IsNullOrWhiteSpace(text))
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{
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if (text.StartsWith("otpauth://totp"))
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{
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_callback(text);
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return;
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}
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else if (Uri.TryCreate(text, UriKind.Absolute, out Uri uri) &&
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!string.IsNullOrWhiteSpace(uri?.Query))
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{
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var queryParts = uri.Query.Substring(1).ToLowerInvariant().Split('&');
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foreach (var part in queryParts)
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{
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if (part.StartsWith("secret="))
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{
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_callback(part.Substring(7)?.ToUpperInvariant());
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return;
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}
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}
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}
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}
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_callback(null);
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}
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private async void Close_Clicked(object sender, System.EventArgs e)
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{
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if (DoOnce())
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{
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await Navigation.PopModalAsync();
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}
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}
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}
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}
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