using System;

public class Program

{   

    public void Main()

    {

        var requestsList = new string[] {

                "https://www.justanswer.com/sip/law?r=ppc|ga|26|||&JPKW=online%20ask%20a%20nurse&JPDC=S&JPST=&JPAD=398233031014&JPMT=b&JPNW=g&JPAF=txt&JPRC=1&JPCD=&JPOP=&cmpid=1059218085&agid=55772528761&fiid=&tgtid=kwd-1373646269&ntw=g&dvc=m&cmpid=1059218085&agid=55772528761&fiid=&tgtid=kwd-1373646269&ntw=g&dvc=m",

                "https://www.justanswer.com/law/jni61-laws-regarding-often-carpet-paint.html?membershipModelTrialType=TrialValue",

                "https://www.justanswer.com/law/jni61-laws-regarding-often-carpet-paint.html?membershipModelTrial=NoTrial",

                "https://www.justanswer.com/law/jni61-laws-regarding-often-carpet-paint.html?membershipModelSubscription=",

                "https://www.justanswer.com/law/membershipModel-regarding-oftner-carpet.html"

        };

        Console.WriteLine("Check if exists membershipModelTrialType - {0}", CheckIfExistsUrlParameter("membershipModelTrialType", requestsList));

        Console.WriteLine("Check if exists membershipModelTrial - {0}", CheckIfExistsUrlParameter("membershipModelTrial", requestsList));

        Console.WriteLine("Check if exists membershipModelSubscription - {0}", CheckIfExistsUrlParameter("membershipModelSubscription", requestsList));

        Console.WriteLine("Check if exists membershipModel - {0}", CheckIfExistsUrlParameter("membershipModel", requestsList));

        Console.WriteLine("Wrong parameter passed - {0}", CheckIfExistsUrlParameter(null, requestsList));

​

        Console.WriteLine("----------------------------------------");

        Console.WriteLine("Get membershipModelTrialType value - {0}", GetUrlParameterValue("membershipModelTrialType", requestsList));

        Console.WriteLine("Get membershipModelTrial value - {0}", GetUrlParameterValue("membershipModelTrial", requestsList));

        Console.WriteLine("Get membershipModelSubscription value - {0}", GetUrlParameterValue("membershipModelSubscription", requestsList));

        Console.WriteLine("Get membershipModel value - {0}", GetUrlParameterValue("membershipModel", requestsList));

        Console.WriteLine("Wrong parameter passed - {0}", GetUrlParameterValue(null, requestsList));

    }

    //Should return "yes" if URL parameter exists, "no" otherwise

    //If the wrong parameter is passed - some log message should appear

    private string CheckIfExistsUrlParameter(string urlParameterName, string[] requestsList)

    {

        return "no";

    }

​

    //Should return the value of URL parameter

    //If the wrong parameter is passed - some log message should appear

    private string GetUrlParameterValue(string urlParameterName, string[] requestsList)

    {

        return "some_value";

    }

​

    //Logger interface

    //Implementation should have logic to extend message with some additional info. For instance,  if it's Info - then something like this: "Info message: {message}"

    interface ILogger

    {

        void Info(string message);

        void Error(string message);

    }

}