DataTransfer_C#AdvancedExam_Oct14_2018

using System;
using System.Collections.Generic;
using System.Linq;
namespace _Exam_Problem01_DataTransferNoRegex
{
    class Program
    {
        static void Main()
        {
            int inputLength = int.Parse(Console.ReadLine());
            //string sendersName = "";
            //string receiversName = "";
            //string cleanMessage = "";
            int totalDataTransferred = 0;

            while(inputLength > 0)
            {
                string[] input = Console.ReadLine()
                    .Split(new[] { ';' }, StringSplitOptions.RemoveEmptyEntries);

                inputLength--;
                if (input.Length != 3)
                {
                    continue;
                }
                char[] rawSender = input[0].ToCharArray();
                char[] rawReceiver = input[1].ToCharArray();
                char[] rawMessage = input[2].ToCharArray();
                string sendersName = "";
                string receiversName = "";
                string cleanMessage = "";
                bool invalidSender = false;
                bool invalidReceiver = false;
                bool invalidMessage = false;
                if(rawSender[0] != 's' || rawSender[1] != ':' || rawSender.Contains(';'))
                {
                    continue;
                }
                if(rawReceiver[0] != 'r' || rawReceiver[1] != ':' || rawReceiver.Contains(';'))
                {
                    continue;
                }

                if(rawMessage[0] != 'm' || rawMessage[1] != '-' || rawMessage[2] != '-' || (!rawMessage.Contains('"')))
                {
                    continue;
                }
                bool messageIsValid = CheckForValiMessage(rawMessage);
                if(!messageIsValid)
                {
                    continue;
                }
                for (int i = 2; i < rawSender.Length; i++)
                {
                    char currentElement = rawSender[i];
                    if(Char.IsLetter(currentElement))
                    {
                        sendersName += currentElement;
                    }
                    else if(Char.IsDigit(currentElement))
                    {
                        totalDataTransferred += int.Parse(currentElement.ToString());
                    }
                    else if(currentElement == ';')
                    {
                        invalidSender = true;
                        break;
                    }
                }
                for (int i = 2; i < rawReceiver.Length; i++)
                {
                    char currentElement = rawReceiver[i];
                    if(Char.IsLetter(currentElement) || currentElement == ' ')
                    {
                        receiversName += currentElement;
                    }
                    else if(Char.IsDigit(currentElement))
                    {
                        totalDataTransferred += int.Parse(currentElement.ToString());
                    }
                    else if(currentElement == ';')
                    {
                        invalidReceiver = true;
                        break;
                    }
                }
                for(int i = 4; i < rawMessage.Length -1; i++)
                {
                    char currentElement = rawMessage[i];
                    if(Char.IsLetter(currentElement) || currentElement == ' ')
                    {
                        cleanMessage += currentElement;
                    }
                    else
                    {
                        invalidMessage = true;
                        break;
                    }
                }
                if(invalidSender || invalidReceiver || invalidMessage)
                {
                    continue;
                }
                Console.WriteLine($"{sendersName} says \"{cleanMessage}\" to {receiversName}");

            }
            Console.Write("Total data transferred: {0}MB", totalDataTransferred);
        }

        private static bool CheckForValiMessage(char[] rawMessage)
        {
            bool validMessage = true;
            for (int i = 5; i < rawMessage.Length - 1; i++)
            {
                char current = rawMessage[i];
                if(!Char.IsLetter(current) && current != ' ' )
                {
                    validMessage = false;
                    break;
                }
            }
            return validMessage;
        }
    }
}