display and update the ending time

MainWindow.cs

@@ -49,6 +49,12 @@ namespace Buypeeb {
 
 		// TODO: whenever we get something from the builder, cache it for later
 		// that way we don't need to constantly do "builder.GetObject"s
+		// when that is done, you can use the cache array to replace everything from here...
+
+		private Box selectionViewBox;
+		private Label endingLabel;
+
+		// ...to here.
 
 		static SemaphoreSlim taskLimit = new SemaphoreSlim(4);
 
@@ -99,6 +105,8 @@ namespace Buypeeb {
 			builder.Autoconnect(this);
 
 			this.statusLabel = (Label)builder.GetObject("LabelStatus");
+			this.selectionViewBox = (Box)builder.GetObject("SelectionViewBox");
+			this.endingLabel = (Label)builder.GetObject("LabelSelectedEnding");
 
 			// bind treeview columns to watchlist instead of needing to manually sync its liststore
 			this.itemTreeView = (TreeView)builder.GetObject("TreeViewItems");
@@ -120,6 +128,7 @@ namespace Buypeeb {
 			}
 
 			this.UpdateItems();
+			GLib.Timeout.Add(1000, new GLib.TimeoutHandler(UpdateSelectionEndTime));
 
 			DeleteEvent += WindowShutdown;
 		}
@@ -182,8 +191,8 @@ namespace Buypeeb {
 
 			using (WebClient client = new WebClient()) {
 				// TODO: download should have timeout
-				// item.Update(client.DownloadString(item.url));
+				item.Update(client.DownloadString(item.url));
-				item.Update(File.ReadAllText("yahoo.html"));
+				// item.Update(File.ReadAllText("yahoo.html"));
 			}
 
 			Gtk.Application.Invoke(delegate {
@@ -191,8 +200,7 @@ namespace Buypeeb {
 				this.items.EmitRowChanged(pathAndIter.path, pathAndIter.iter);
 				if (item == this.selectedItem) {
 					// if the user has this item selected and it just became ready, enable the selection box
-					var s = (Box)this.builder.GetObject("SelectionViewBox");
+					this.selectionViewBox.Sensitive = true;
-					s.Sensitive = true;
 				}
 			});
 
@@ -215,8 +223,7 @@ namespace Buypeeb {
 		}
 
 		private void UpdateItems() {
-			var s = (Box)this.builder.GetObject("SelectionViewBox");
+			this.selectionViewBox.Sensitive = false;
-			s.Sensitive = false;
 
 			var t = Task.Factory.StartNew(() => {
 				foreach (var item in this.settings.watchlist) {
@@ -229,18 +236,17 @@ namespace Buypeeb {
 		private void UpdateSelectionView() {
 			// get the currently selected item
 			var item = this.selectedItem;
-			var s = (Box)this.builder.GetObject("SelectionViewBox");
 			var infobox = (Box)this.builder.GetObject("SelectionInfoBox");
 
 			if (item == null) {
-				s.Sensitive = false;
+				this.selectionViewBox.Sensitive = false;
 				infobox.Visible = false;
 				var l = (Label)this.builder.GetObject("LabelSelectedName");
 				l.Text = "buypeeb";
 				return;
 			}
 
-			s.Sensitive = item.ready;
+			this.selectionViewBox.Sensitive = item.ready;
 			infobox.Visible = true;
 
 			var info = new Dictionary<string, string>();
@@ -248,7 +254,7 @@ namespace Buypeeb {
 			info.Add("YahooName", item.originalName);
 			info.Add("Price", item.PriceJPY());
 			info.Add("PriceAUD", item.PriceAUD());
-			info.Add("Ending", "whenever");
+			info.Add("Ending", "...");
 			info.Add("Bids", $"{item.bids}");
 			info.Add("BuyItNow", item.winPrice == 0 ? "No" : $"¥{item.PriceJPY(true)} (${item.PriceAUD(true)})");
 			info.Add("AutoExtension", item.autoExtension ? "Yes" : "No");
@@ -413,8 +419,7 @@ namespace Buypeeb {
 		}
 
 		private void ButtonSelectedUpdateClicked(object sender, EventArgs args) {
-			var s = (Box)this.builder.GetObject("SelectionViewBox");
+			this.selectionViewBox.Sensitive = false;
-			s.Sensitive = false;
 			this.UpdateItem(this.selectedItem.id);
 		}
 
@@ -455,5 +460,38 @@ namespace Buypeeb {
 			(cell as Gtk.CellRendererText).Text = item.ready ? ending : "...";
 		}
 
+		// timers
+
+		private bool UpdateSelectionEndTime() {
+			if (!this.selectionViewBox.IsSensitive) {
+				return true;
+			}
+
+			var item = this.selectedItem;
+			if (!item.ready) {
+				return true;
+			}
+
+			string ending = "";
+			if (item.available) {
+				var now = DateTime.Now;
+				var end = item.endDate.ToLocalTime();
+				var span = end.Subtract(now);
+
+				if (span.Days > 0) {
+					ending += span.ToString("dd' days, '"); // will format twelve days as "12 days, "
+				}
+				// timespan objects don't contain definitions for the time or date separators, so the colons need to be escaped
+				// `HH` doesn't exist, but `hh` behaves identically
+				// see https://docs.microsoft.com/en-us/dotnet/standard/base-types/standard-timespan-format-strings 
+				ending += span.ToString(@"hh\:mm\:ss");
+			}
+			else {
+				ending = "Auction has ended";
+			}
+
+			this.endingLabel.Text = ending;
+			return true;
+		}
 	}
 }