54 lines
1.6 KiB
C#
54 lines
1.6 KiB
C#
using CoreNFC;
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using Foundation;
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using System;
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using System.Collections.Generic;
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using System.Text.RegularExpressions;
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namespace Bit.iOS.Core
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{
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public class NFCReaderDelegate : NFCNdefReaderSessionDelegate
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{
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private Regex _otpPattern = new Regex("^.*?([cbdefghijklnrtuv]{32,64})$");
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private Action<bool, string> _callback;
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public NFCReaderDelegate(Action<bool, string> callback)
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{
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_callback = callback;
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}
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public override void DidDetect(NFCNdefReaderSession session, NFCNdefMessage[] messages)
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{
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var results = new List<string>();
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foreach (var message in messages)
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{
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foreach (var record in message.Records)
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{
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try
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{
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results.Add(new NSString(record.Payload, NSStringEncoding.UTF8));
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}
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catch { }
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}
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}
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foreach (var result in results)
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{
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var matches = _otpPattern.Matches(result);
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if (matches.Count > 0 && matches[0].Groups.Count > 1)
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{
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var otp = matches[0].Groups[1].ToString();
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_callback.Invoke(true, otp);
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return;
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}
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}
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_callback.Invoke(false, "No tags were read.");
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}
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public override void DidInvalidate(NFCNdefReaderSession session, NSError error)
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{
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_callback.Invoke(false, error?.LocalizedDescription);
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}
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}
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}
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