VarDump extensibility with descriptor

CSharp · Console

/Program.cs

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;
    }
}