Fix Redundance Reference

AMREZ.EOP.Application/UseCases/Payments/SlipVerification/QrDecode/TransRefParser.cs

@@ -1,6 +1,87 @@
+using System.Text.RegularExpressions;
+
 namespace AMREZ.EOP.Application.UseCases.Payments.SlipVerification.QrDecode;
 
-public class TransRefParser
+public static partial class TransRefParser
 {
-    
+    [GeneratedRegex(@"(?i)(?:[?&](?:transref|transactionid|txnid|transid)=)(?<id>[-A-Za-z0-9]{10,64})",
+        RegexOptions.Compiled | RegexOptions.IgnoreCase)]
+    private static partial Regex QueryId();
+
+    [GeneratedRegex(@"(?<![A-Za-z0-9])(?<id>[0-9]{6,14}[A-Za-z0-9]{6,40})(?![A-Za-z0-9])",
+        RegexOptions.Compiled)]
+    private static partial Regex FallbackShape();
+
+    public static string? TryExtract(string? raw)
+    {
+        if (string.IsNullOrWhiteSpace(raw)) return null;
+
+        // 1) ?transRef=... ใน URL
+        var q = QueryId().Match(raw);
+        if (q.Success) return q.Groups["id"].Value;
+
+        // 2) เดิน TLV แบบ recursive
+        foreach (var val in EnumerateTlvValues(raw))
+        {
+            // ต้องเป็น a-z0-9 ล้วน ยาวพอสมควร และมีตัวอักษรด้วย (กันเคสเป็นตัวเลขล้วน)
+            if (val.Length is >= 18 and <= 40
+                && val.All(IsAlphaNum)
+                && val.Any(char.IsLetter))
+                return val;
+        }
+
+        // 3) เผื่อกรณีหลุดรูปแบบ TLV
+        var f = FallbackShape().Match(raw);
+        return f.Success ? f.Groups["id"].Value : null;
+    }
+
+    private static IEnumerable<string> EnumerateTlvValues(string s)
+    {
+        int i = 0;
+        while (i + 4 <= s.Length)
+        {
+            // รูปแบบ TLV: [ID(2)][LEN(2)][VALUE(LEN)]
+            if (!char.IsDigit(s[i]) || !char.IsDigit(s[i + 1]) ||
+                !char.IsDigit(s[i + 2]) || !char.IsDigit(s[i + 3]))
+                yield break;
+
+            var id  = s.Substring(i, 2);
+            if (!int.TryParse(s.AsSpan(i + 2, 2), out var len)) yield break;
+            var end = i + 4 + len;
+            if (len < 0 || end > s.Length) yield break;
+
+            var val = s.Substring(i + 4, len);
+            yield return val;
+
+            // ถ้า value ดูเป็น TLV ซ้อนอยู่ ให้ไล่ต่อ
+            if (LooksLikeTlv(val))
+                foreach (var inner in EnumerateTlvValues(val))
+                    yield return inner;
+
+            // CRC tag "63" ไม่เกี่ยว แต่เราไม่ถึงเงื่อนไข length อยู่แล้ว
+            i = end;
+        }
+    }
+
+    private static bool LooksLikeTlv(string s)
+    {
+        int i = 0;
+        while (i + 4 <= s.Length)
+        {
+            if (!char.IsDigit(s[i]) || !char.IsDigit(s[i + 1]) ||
+                !char.IsDigit(s[i + 2]) || !char.IsDigit(s[i + 3]))
+                return false;
+
+            if (!int.TryParse(s.AsSpan(i + 2, 2), out var len)) return false;
+            i += 4 + len;
+            if (i == s.Length) return true;
+            if (i > s.Length)  return false;
+        }
+        return false;
+    }
+
+    private static bool IsAlphaNum(char c) =>
+        (c >= '0' && c <= '9') ||
+        (c >= 'A' && c <= 'Z') ||
+        (c >= 'a' && c <= 'z');
 }

AMREZ.EOP.Application/UseCases/Payments/SlipVerification/QrDecode/ZxingQrDecoder.cs

@@ -1,6 +1,22 @@
+using AMREZ.EOP.Abstractions.Applications.UseCases.Payments.SlipVerification.QrDecode;
+using SkiaSharp;
+using ZXing.SkiaSharp;
+
 namespace AMREZ.EOP.Application.UseCases.Payments.SlipVerification.QrDecode;
 
-public class ZxingQrDecoder
+public sealed class ZxingQrDecoder : IQrDecoder
 {
-    
+    public string? TryDecodeText(byte[] imageBytes)
+    {
+        using var bmp = SKBitmap.Decode(imageBytes);
+        if (bmp is null) return null;
+
+        var reader = new BarcodeReader
+        {
+            AutoRotate = true,
+            Options = { TryHarder = true, PossibleFormats = new[] { ZXing.BarcodeFormat.QR_CODE } }
+        };
+        var res = reader.Decode(bmp);
+        return res?.Text;
+    }
 }