penaltycalculator.cs

using System;
using System.Collections.Generic;
using System.Text;
using LibraryConfigUtilities;

namespace LibraryBusiness
{
    /* Description,
     * settingList member holds configuration parameters stored in the App.config file, 
     * please explore the properties and methods in the Country class to get a better understanding.
     * 
     * Please implement this class accordingly to accomplish requirements.
     * Feel free to add any parameters, methods, class members, etc. if necessary
     */
    public class PenaltyFeeCalculator {
        string CountryCode;
        DateTime DateStart, DateEnd;
        
        private List<Country> settingList = new LibrarySetting().LibrarySettingList;

        
        public PenaltyFeeCalculator(string country_code, DateTime date_start, DateTime date_end) 
        {
            CountryCode = country_code;
            DateStart = date_start;
            DateEnd = date_end;
        }

        public String Calculate() 
        {
            return System.Configuration.ConfigurationManager.AppSettings[LibrarySetting.Currency];

            //double penaltyMultiplier = ;     it will be penalty multiplier from App.config but i didn't this command.
            /*double penaltyMultiplier = 5.25;
            string fee = "";
            
            int days = GetBusinessDays(DateStart, DateEnd);

            if (days <= 0)
                fee = "0.00";
            else
                fee = Convert.ToString(penaltyMultiplier * GetBusinessDays(DateStart, DateEnd));

            return fee;*/
        }

        private int GetBusinessDays(DateTime firstDay, DateTime lastDay)
        {
            firstDay = firstDay.Date;
            lastDay = lastDay.Date;
            if (firstDay > lastDay)
                throw new ArgumentException("Incorrect last day " + lastDay);

            TimeSpan span = lastDay - firstDay;
            int businessDays = span.Days + 1;
            int fullWeekCount = businessDays / 7;
            // Find out if there are weekends during the time exceedng the full weeks
            if (businessDays > fullWeekCount * 7)
            {
                // We are here to find out if there is a 1-day or 2-days weekend
                // In the time interval remaining after subtracting the complete weeks
                int firstDayOfWeek = (int)firstDay.DayOfWeek;
                int lastDayOfWeek = (int)lastDay.DayOfWeek;
                if (lastDayOfWeek < firstDayOfWeek)
                    lastDayOfWeek += 7;
                if (firstDayOfWeek <= 6)
                {
                    if (lastDayOfWeek >= 7)// Both Saturday and Sunday are in the remaining time interval
                        businessDays -= 2;
                    else if (lastDayOfWeek >= 6)// Only Saturday is in the remaining time interval
                        businessDays -= 1;
                }
                else if (firstDayOfWeek <= 7 && lastDayOfWeek >= 7)// Only Sunday is in the remaining time interval
                    businessDays -= 1;
            }

            // subtract the weekends during the full weeks in the interval
            businessDays -= fullWeekCount + fullWeekCount;

            return businessDays;
        }
    }
}