using System;

using System.Text;

using MimeKit.Utils;

​

public class Program

{

    public class Assert {

        public static void Equal(string expected, string actual) 

        {

            if (expected == actual) {

                Console.WriteLine("True");

            } else {

                Console.WriteLine(string.Format("False - expected: {0}, actual: {1}", expected, actual));

            }

        }

        public static void Equal(byte[] expected, byte[] actual) 

        {

            Equal(BitConverter.ToString(expected).Replace("-", " "), BitConverter.ToString(actual).Replace("-", " "));

        }

    }

    public static void Main()

    {

        TestEncodingCorrectText();

        TestEncodingInvalidText();

        TestEncodingJustEmail();

        TestEncodingUrlWithoutEmail();

        TestByteArrayIsCorrect();

    }

    public static void TestEncodingCorrectText()

    {

        var urlFromBytes2 = new byte[]

        {

            0x3C, 0x68, 0x74, 0x74, 0x70, 0x73, 0x3A, 0x2F, 0x2F, 0x77, 0x77, 0x77, 0x2E, 0x65, 0x6D, 0x63, 0x6C, 0x69,

            0x65, 0x6E, 0x74, 0x2E, 0x63, 0x6F, 0x6D, 0x2F, 0x75, 0x6E, 0x73, 0x75, 0x62, 0x73, 0x63, 0x72, 0x69, 0x62,

            0x65, 0x2E, 0x61, 0x73, 0x70, 0x78, 0x3F, 0x65, 0x6D, 0x61, 0x69, 0x6C, 0x3D,

​

            // test@test.com

            0x74, 0x65, 0x73, 0x74, 0x40, 0x74, 0x65, 0x73, 0x74, 0x2E, 0x63, 0x6F, 0x6D,

​

            0x26, 0x6E, 0x6F, 0x77, 0x3D, 0x74, 0x72, 0x75, 0x65, 0x3E

        };

        var text = Encoding.UTF8.GetString(urlFromBytes2);

​

        var result = Rfc2047.EncodeText(Encoding.UTF8, text);

        var resultAsText = Encoding.UTF8.GetString(result);

​

        Assert.Equal("<https://www.emclient.com/unsubscribe.aspx?email=test@test.com&now=true>", resultAsText);

    }

​

    public static void TestEncodingInvalidText()

    {

        var urlFromBytes2 = new byte[]

        {

            0x3C, 0x68, 0x74, 0x74, 0x70, 0x73, 0x3A, 0x2F, 0x2F, 0x77, 0x77, 0x77, 0x2E, 0x65, 0x6D, 0x63, 0x6C, 0x69,

            0x65, 0x6E, 0x74, 0x2E, 0x63, 0x6F, 0x6D, 0x2F, 0x75, 0x6E, 0x73, 0x75, 0x62, 0x73, 0x63, 0x72, 0x69, 0x62,

            0x65, 0x2E, 0x61, 0x73, 0x70, 0x78, 0x3F, 0x65, 0x6D, 0x61, 0x69, 0x6C, 0x3D,

​

            // klingenberg@emclient.com

            0x6B, 0x6C, 0x69, 0x6E, 0x67, 0x65, 0x6E, 0x62, 0x65, 0x72, 0x67, 0x40, 0x65, 0x6D, 0x63,

            0x6C, 0x69, 0x65, 0x6E, 0x74, 0x2E, 0x63, 0x6F, 0x6D,

​

            0x26, 0x6E, 0x6F, 0x77, 0x3D, 0x74, 0x72, 0x75, 0x65, 0x3E

        };

        var text = Encoding.UTF8.GetString(urlFromBytes2);

​

        var result = Rfc2047.EncodeText(Encoding.UTF8, text);

        var resultAsText = Encoding.UTF8.GetString(result);

​

        Assert.Equal("<https://www.emclient.com/unsubscribe.aspx?email=klingenberg@emclient.com&now=true>", resultAsText);

    }

    public static void TestEncodingJustEmail()

    {

        var urlFromBytes2 = new byte[]

        {

            // klingenberg@emclient.com

            0x6B, 0x6C, 0x69, 0x6E, 0x67, 0x65, 0x6E, 0x62, 0x65, 0x72, 0x67, 0x40, 0x65, 0x6D, 0x63,

            0x6C, 0x69, 0x65, 0x6E, 0x74, 0x2E, 0x63, 0x6F, 0x6D,

        };

        var text = Encoding.UTF8.GetString(urlFromBytes2);

​

        var result = Rfc2047.EncodeText(Encoding.UTF8, text);

        var resultAsText = Encoding.UTF8.GetString(result);

​

        Assert.Equal("klingenberg@emclient.com", resultAsText);

    }

​

    public static void TestEncodingUrlWithoutEmail()

    {

        var urlFromBytes2 = new byte[]

        {

            0x3C, 0x68, 0x74, 0x74, 0x70, 0x73, 0x3A, 0x2F, 0x2F, 0x77, 0x77, 0x77, 0x2E, 0x65, 0x6D, 0x63, 0x6C, 0x69,

            0x65, 0x6E, 0x74, 0x2E, 0x63, 0x6F, 0x6D, 0x2F, 0x75, 0x6E, 0x73, 0x75, 0x62, 0x73, 0x63, 0x72, 0x69, 0x62,

            0x65, 0x2E, 0x61, 0x73, 0x70, 0x78, 0x3F, 0x65, 0x6D, 0x61, 0x69, 0x6C, 0x3D,

​

            0x26, 0x6E, 0x6F, 0x77, 0x3D, 0x74, 0x72, 0x75, 0x65, 0x3E

        };

        var text = Encoding.UTF8.GetString(urlFromBytes2);

​

        var result = Rfc2047.EncodeText(Encoding.UTF8, text);

        var resultAsText = Encoding.UTF8.GetString(result);

​

        Assert.Equal("<https://www.emclient.com/unsubscribe.aspx?email=&now=true>", resultAsText);

    }

    public static void TestByteArrayIsCorrect()

    {

        Console.WriteLine("Checking string is correcly converted to bytes");

        var originalText = "<https://www.emclient.com/unsubscribe.aspx?email=klingenberg@emclient.com&now=true>";

        var originalUtfBytes = Encoding.UTF8.GetBytes(originalText);

        var originalAsciiBytes = Encoding.ASCII.GetBytes(originalText);

​

        Assert.Equal(originalUtfBytes, originalAsciiBytes);

​

        var urlFromBytes2 = new byte[]

        {

            0x3C, 0x68, 0x74, 0x74, 0x70, 0x73, 0x3A, 0x2F, 0x2F, 0x77, 0x77, 0x77, 0x2E, 0x65, 0x6D, 0x63, 0x6C, 0x69,

            0x65, 0x6E, 0x74, 0x2E, 0x63, 0x6F, 0x6D, 0x2F, 0x75, 0x6E, 0x73, 0x75, 0x62, 0x73, 0x63, 0x72, 0x69, 0x62,

            0x65, 0x2E, 0x61, 0x73, 0x70, 0x78, 0x3F, 0x65, 0x6D, 0x61, 0x69, 0x6C, 0x3D,

​

            // klingenberg@emclient.com

            0x6B, 0x6C, 0x69, 0x6E, 0x67, 0x65, 0x6E, 0x62, 0x65, 0x72, 0x67, 0x40, 0x65, 0x6D, 0x63,

            0x6C, 0x69, 0x65, 0x6E, 0x74, 0x2E, 0x63, 0x6F, 0x6D,

​

            0x26, 0x6E, 0x6F, 0x77, 0x3D, 0x74, 0x72, 0x75, 0x65, 0x3E

        };

        var text = Encoding.UTF8.GetString(urlFromBytes2);

​

        Assert.Equal(originalText, text);

        Assert.Equal(originalUtfBytes, urlFromBytes2);

    }

}