refactor: rearrange and add solution for 4-series

src/PepperDash.Essentials.Core/Timers/CountdownTimer.cs

@@ -0,0 +1,148 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using Crestron.SimplSharp;
+
+using PepperDash.Core;
+
+namespace PepperDash.Essentials.Core
+{
+    public class SecondsCountdownTimer: IKeyed
+    {
+        public event EventHandler<EventArgs> HasStarted;
+        public event EventHandler<EventArgs> HasFinished;
+        public event EventHandler<EventArgs> WasCancelled;
+
+        public string Key { get; private set; }
+
+        public BoolFeedback IsRunningFeedback { get; private set; }
+        bool _isRunning;
+
+        public IntFeedback PercentFeedback { get; private set; }
+        public StringFeedback TimeRemainingFeedback { get; private set; }
+
+        public bool CountsDown { get; set; }
+
+        /// <summary>
+        /// The number of seconds to countdown
+        /// </summary>
+        public int SecondsToCount { get; set; }
+        
+        public DateTime StartTime { get; private set; }
+        public DateTime FinishTime { get; private set; }
+ 
+        private CTimer _secondTimer;
+
+        /// <summary>
+        /// Constructor
+        /// </summary>
+        /// <param name="key"></param>
+        public SecondsCountdownTimer(string key)
+        {
+            Key = key;
+            IsRunningFeedback = new BoolFeedback(() => _isRunning);
+
+            TimeRemainingFeedback = new StringFeedback(() =>
+                {
+                    // Need to handle up and down here.
+
+                    var timeSpan = FinishTime - DateTime.Now;
+
+                    Debug.Console(2, this,
+                        "timeSpan.Minutes == {0}, timeSpan.Seconds == {1}, timeSpan.TotalSeconds == {2}",
+                        timeSpan.Minutes, timeSpan.Seconds, timeSpan.TotalSeconds);
+
+                    if (Math.Floor(timeSpan.TotalSeconds) < 60 && Math.Floor(timeSpan.TotalSeconds) >= 0) //ignore milliseconds
+                    {
+                        return String.Format("{0:00}", timeSpan.Seconds);
+                    }
+
+                    return Math.Floor(timeSpan.TotalSeconds) < 0
+                        ? "00"
+                        : String.Format("{0:00}:{1:00}", timeSpan.Minutes, timeSpan.Seconds);
+                });
+
+            PercentFeedback =
+                new IntFeedback(
+                    () =>
+                        (int)
+                            (Math.Floor((FinishTime - DateTime.Now).TotalSeconds)/
+                             Math.Floor((FinishTime - StartTime).TotalSeconds)*100));
+        }
+
+        /// <summary>
+        /// Starts the Timer
+        /// </summary>
+        public void Start()
+        {
+            if (_isRunning)
+                return;
+            StartTime = DateTime.Now;
+            FinishTime = StartTime + TimeSpan.FromSeconds(SecondsToCount);
+
+            if (_secondTimer != null)
+                _secondTimer.Stop();
+            _secondTimer = new CTimer(SecondElapsedTimerCallback, null, 0, 1000);
+            _isRunning = true;
+            IsRunningFeedback.FireUpdate();
+
+            var handler = HasStarted;
+            if (handler != null)
+                handler(this, new EventArgs());
+        }
+
+        /// <summary>
+        /// Restarts the timer
+        /// </summary>
+        public void Reset()
+        {
+            _isRunning = false;
+            Start();
+        }
+
+        /// <summary>
+        /// Cancels the timer (without triggering it to finish)
+        /// </summary>
+        public void Cancel()
+        {
+            StopHelper();
+            
+            var handler = WasCancelled;
+            if (handler != null)
+                handler(this, new EventArgs());
+        }
+
+        /// <summary>
+        /// Called upon expiration, or calling this will force timer to finish.
+        /// </summary>
+        public void Finish()
+        {
+            StopHelper();
+
+            var handler = HasFinished;
+            if (handler != null)
+                handler(this, new EventArgs());
+        }
+
+        void StopHelper()
+        {
+            if (_secondTimer != null)
+                _secondTimer.Stop();
+            _isRunning = false;
+            IsRunningFeedback.FireUpdate(); 
+        }
+
+        void SecondElapsedTimerCallback(object o)
+        {
+            if (DateTime.Now >= FinishTime)
+            {
+                Finish();
+                return;
+            }
+
+            PercentFeedback.FireUpdate();
+            TimeRemainingFeedback.FireUpdate();
+        }
+    }
+}