2018 Day 02 incomplete solution - committed for posterity in case I ever go back to it

2018/Day 04/Program.cs

@@ -0,0 +1,81 @@
+using System;
+using System.IO;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text.RegularExpressions;
+
+namespace Day_04
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            // Find the guard that has the most minutes asleep. 
+            // What minute does that guard spend asleep the most?
+
+
+
+            // Make an empty list of guards
+            List<Guard> guards = new List<Guard>();
+
+            // Take in an unordered list of times and dates when guards start shifts, fall asleep and wake up 
+            var lines = File.ReadAllLines("input.txt");
+
+            // Sort that into an ordered list, by date then time
+            List<Action> actions = new List<Action>();
+            foreach (var line in lines)
+            {
+                Action action = new Action();
+
+                Regex re1 = new Regex(@"((\d\d\d\d-\d\d-\d\d))");
+                var dateString = re1.Matches(line)[0].Value;
+                action.Date = dateString.Substring(0, dateString.Length);
+
+                Regex re2 = new Regex(@"((\d\d:\d\d))");
+                var timeString = re2.Matches(line)[0].Value;
+                action.Time = timeString.Substring(0, timeString.Length);
+
+                Regex re3 = new Regex(@"(\] (.*))");
+                Match match3 = re3.Match(line);
+                action.Description = match3.Groups[2].Value;
+
+                actions.Add(action);
+            }
+            actions = actions.OrderBy(a => a.Date).ThenBy(a => a.Time).ToList();
+
+            // Use the ordered list to create a list of days with the guard id and a breakdown of minutes slept and awake
+            List<Day> days = new List<Day>(); 
+            foreach (var action in actions)
+            {
+                Day day = new Day();
+                if(days.Any(d => d.Date == action.Date))
+                {
+                    day = days.First
+                }
+
+                day.Date = action.Date;
+
+                Regex re1 = new Regex(@"(#(\d+))");
+                Match match1 = re1.Match(action.Description);
+                if (match1.Success)
+                {
+                    day.GuardId = Int32.Parse(match1.Groups[2].Value);
+                }
+                else
+                {
+                    // Use the ID from a previous action on the same day
+                    day.GuardId = days.First(d => d.Date == day.Date).GuardId;
+                }
+                
+
+
+                // Date
+                // GuardId 
+                // IsAsleepThisMinute 
+            }
+
+            // Use the list of days to populate the list of guards 
+
+        }
+    }
+}