Add command to buy cards

static/game.html

@@ -481,7 +481,6 @@ img.card:hover {
 
         function SupplyPile(initialVnode) {
             var dragStart = function(ev) {
-                console.log(ev);
                 let data = {
                     source: "Supply",
                     name: ev.target.dataset.name,
@@ -490,7 +489,16 @@ img.card:hover {
                 ev.dataTransfer.setData("text", JSON.stringify(data));
             }
 
-           return {
+            var doubleclick = function(ev) {
+                let msg = {
+                    type: "BuyCard",
+                    index: parseInt(ev.srcElement.parentElement.dataset.index),
+                }
+
+                webSocket.send(JSON.stringify(msg));
+            }
+
+            return {
                 view: function(vnode) {
                     return m(".supply-pile",
                         {
@@ -499,6 +507,7 @@ img.card:hover {
                             "data-index": vnode.attrs.index,
                             ondragstart: dragStart,
                             draggable: true,
+                            ondblclick: doubleclick,
                         },
                         m("img", {
                             class: "card",