Introduce new bot-page UI

appengine/swarming/elements/res/imp/botpage/bot-page-demo.html

Index: appengine/swarming/elements/res/imp/botpage/bot-page-demo.html
diff --git a/appengine/swarming/elements/res/imp/botpage/bot-page-demo.html b/appengine/swarming/elements/res/imp/botpage/bot-page-demo.html
index bffc60cf4dd156ffa041d57651e37228637e38a8..8d1930007243259befa601681e6d65568804a4b6 100644
--- a/appengine/swarming/elements/res/imp/botpage/bot-page-demo.html
+++ b/appengine/swarming/elements/res/imp/botpage/bot-page-demo.html
@@ -39,8 +39,18 @@
         }
         sinon.log("User authenticated :) "+ request.requestHeaders.authorization);
         sinon.log("Bot Request: "+sinon.format(request));
-        // TODO(kjlubick)make this return a thing from the list
-        request.respond(200, {"Content-Type":"application/json"}, JSON.stringify(arr[0]));
+        // If the user changes bot id, show them some of the other sample data.
+        var idx = request.url.indexOf("-00");
+        var item = 0;
+        if (idx !=-1) {
+          var name = request.url.substring(idx+1, idx+4);
+          item = parseInt(name) || 0;
+          name = Math.max(name - 1, 0);
+          name = Math.min(name, arr.length-1);
+        }
+
+
+        request.respond(200, {"Content-Type":"application/json"}, JSON.stringify(arr[name]));
       }
     }