domain service

gistfile1.cs

using System;
using System.Collections.Generic;
using System.Linq;

namespace DMSSubscriberUpdate.Domain.Services
{
    class SubscriberProcessor
    {
        protected Subscriber Subscriber { get; set; }

        public SubscriberProcessor(Subscriber subscriber)
        {
            Subscriber = subscriber;
        }

        public Subscriber Process()
        {
            //the first attempt
            var skip = 0;
            Attempt attempt = null;
            while (skip != Subscriber.Attempts.Count)
            {
                Attempt next = Subscriber.Attempts.Skip(skip).Take(1).First();
                if (attempt == null)
                {
                    next.Succeed();
                }
                else
                {
                    if (next.ChannelID == attempt.ChannelID && next.Confirmed == attempt.Confirmed)
                    {
                        next.Fail();
                    }
                    else if (next.ChannelID == attempt.ChannelID && next.Confirmed != attempt.Confirmed)
                    {
                        next.Succeed();
                    }
                    else if (next.ChannelID != attempt.ChannelID)
                    {
                        //first attempt in new channel
                        next.Succeed();
                    }
                }
                skip++;
                attempt = next;
            }
            return Subscriber;
        }
    }
}