using System;

using VarDump;

using VarDump.Visitor;

using VarDump.Visitor.Descriptors;

using VarDump.Visitor.Descriptors.Specific;

​

// For more examples see https://github.com/ycherkes/VarDump/blob/main/test/VarDump.UnitTests/ObjectDescriptorMiddlewareSpec.cs

​

var obj = new

{

    FullName = "BRUCE LEE",

    CardNumber = "4953089013607",

    OtherInfo = new 

    {

        CardNumber = "5201294442453002",

    }

};

​

var options = new DumpOptions

{

    Descriptors = 

    { 

        new ObjectContentReplacer { Replacement = MaskCardNumber }

    }

};

​

var csDumper = new CSharpDumper(options);

var cs = csDumper.Dump(obj);

​

var vbDumper = new VisualBasicDumper(options);

var vb = vbDumper.Dump(obj);

​

// C# string

Console.WriteLine(cs);

​

// VB string

Console.WriteLine(vb);

​

static ReflectionDescription MaskCardNumber(ReflectionDescription description)

{

    if (!IsCardNumber(description) || string.IsNullOrWhiteSpace((string)description.Value))

    {

        return description;

    }

​

    var stringValue = (string)description.Value;

​

    var maskedValue = stringValue.Length - 4 > 0

        ? new string('*', stringValue.Length - 4) + stringValue.Substring(stringValue.Length - 4)

        : stringValue;

​

    return description with

    {

        Value = maskedValue

    };

​

    static bool IsCardNumber(ReflectionDescription description)

    {

        return description.Type == typeof(string)

               && description.Name?.EndsWith("cardnumber", StringComparison.OrdinalIgnoreCase) == true;

    }

}