Add trade history back to the UI using the refactored order book

order_book.go

@@ -233,53 +233,6 @@ func (o *OrderBook) match(msg Message) {
 
 	e.Size = e.Size.Sub(msg.Size)
 	o.setEntry(e)
-
-//         if trades.Length() == 256 {
-//                 trades.Dequeue()
-//         }
-
-//         trades.Enqueue(msg)
-
-//         max := history.Size().Y
-//         length := trades.Length()
-//         var num int
-//         if length > max {
-//                 num = max
-//         } else {
-//                 num = length
-//         }
-
-//         for i := 0; i < num; i++ {
-//                 var index int
-
-//                 adj := trades.Length() - i - 1
-
-//                 if adj < 0 {
-//                         break
-//                 } else {
-//                         index = adj
-//                 }
-
-//                 e := trades.Element(index)
-
-//                 if e != nil {
-//                         msg := e.(Message)
-
-//                         var attrs exhibit.Attributes
-
-//                         switch msg.Side {
-//                         case "buy":
-//                                 attrs.ForegroundColor = exhibit.FGRed
-//                         case "sell":
-//                                 attrs.ForegroundColor = exhibit.FGGreen
-//                         }
-
-//                         le := ListEntry{fmtHistoryEntry(msg), attrs}
-//                         history.AddEntry(le)
-//                 }
-//         }
-
-//         history.Commit()
 }
 
 func (o *OrderBook) change(msg Message) {

spectator.go

@@ -88,6 +88,10 @@ func main() {
 
 	for msg := range ob.Msg {
 		updateOrders(msg.Side)
+
+		if msg.Type == "match" {
+			addTrade(msg)
+		}
 	}
 }
 
@@ -268,3 +272,52 @@ func updateBids(entries []Entries) {
 
 	topBids.Commit()
 }
+
+func addTrade(msg Message) {
+	if trades.Length() == 256 {
+		trades.Dequeue()
+	}
+
+	trades.Enqueue(msg)
+
+	max := history.Size().Y
+	length := trades.Length()
+	var num int
+	if length > max {
+		num = max
+	} else {
+		num = length
+	}
+
+	for i := 0; i < num; i++ {
+		var index int
+
+		adj := trades.Length() - i - 1
+
+		if adj < 0 {
+			break
+		} else {
+			index = adj
+		}
+
+		e := trades.Element(index)
+
+		if e != nil {
+			msg := e.(Message)
+
+			var attrs exhibit.Attributes
+
+			switch msg.Side {
+			case "buy":
+				attrs.ForegroundColor = exhibit.FGRed
+			case "sell":
+				attrs.ForegroundColor = exhibit.FGGreen
+			}
+
+			le := ListEntry{fmtHistoryEntry(msg), attrs}
+			history.AddEntry(le)
+		}
+	}
+
+	history.Commit()
+}