Add flash detection to TripleLift adapter (prebid#855)

* add flash detection to TripleLift adapter

* add window

Author: tiffwu

src/adapters/triplelift.js

@@ -14,17 +14,16 @@ var TripleLiftAdapter = function TripleLiftAdapter() {
     var tlReq = params.bids;
     var bidsCount = tlReq.length;
 
-    //set expected bids count for callback execution
-    //bidmanager.setExpectedBidsCount('triplelift',bidsCount);
+    // set expected bids count for callback execution
+    // bidmanager.setExpectedBidsCount('triplelift',bidsCount);
 
     for (var i = 0; i < bidsCount; i++) {
       var bidRequest = tlReq[i];
       var callbackId = bidRequest.bidId;
       adloader.loadScript(buildTLCall(bidRequest, callbackId));
-      //store a reference to the bidRequest from the callback id
-      //bidmanager.pbCallbackMap[callbackId] = bidRequest;
+      // store a reference to the bidRequest from the callback id
+      // bidmanager.pbCallbackMap[callbackId] = bidRequest;
     }
-
   }
 
 
@@ -33,8 +32,7 @@ var TripleLiftAdapter = function TripleLiftAdapter() {
     var inventoryCode = utils.getBidIdParameter('inventoryCode', bid.params);
     var floor = utils.getBidIdParameter('floor', bid.params);
 
-
-    //build our base tag, based on if we are http or https
+    // build our base tag, based on if we are http or https
     var tlURI = '//tlx.3lift.com/header/auction?';
     var tlCall = document.location.protocol + tlURI;
 
@@ -45,17 +43,20 @@ var TripleLiftAdapter = function TripleLiftAdapter() {
     tlCall = utils.tryAppendQueryString(tlCall, 'inv_code', inventoryCode);
     tlCall = utils.tryAppendQueryString(tlCall, 'floor', floor);
 
-    //sizes takes a bit more logic
+    // indicate whether flash support exists
+    tlCall = utils.tryAppendQueryString(tlCall, 'fe', isFlashEnabled());
+
+    // sizes takes a bit more logic
     var sizeQueryString = utils.parseSizesInput(bid.sizes);
     if (sizeQueryString) {
       tlCall += 'size=' + sizeQueryString + '&';
     }
 
-    //append referrer
+    // append referrer
     var referrer = utils.getTopWindowUrl();
     tlCall = utils.tryAppendQueryString(tlCall, 'referrer', referrer);
 
-    //remove the trailing "&"
+    // remove the trailing "&"
     if (tlCall.lastIndexOf('&') === tlCall.length - 1) {
       tlCall = tlCall.substring(0, tlCall.length - 1);
     }
@@ -64,22 +65,36 @@ var TripleLiftAdapter = function TripleLiftAdapter() {
     utils.logMessage('tlCall request built: ' + tlCall);
     // @endif
 
-    //append a timer here to track latency
+    // append a timer here to track latency
     bid.startTime = new Date().getTime();
 
     return tlCall;
-
   }
 
+  function isFlashEnabled() {
+    var hasFlash = 0;
+    try {
+      // check for Flash support in IE
+      var fo = new window.ActiveXObject('ShockwaveFlash.ShockwaveFlash');
+      if (fo) { hasFlash = 1; }
+    } catch (e) {
+      if (navigator.mimeTypes &&
+        navigator.mimeTypes['application/x-shockwave-flash'] !== undefined &&
+        navigator.mimeTypes['application/x-shockwave-flash'].enabledPlugin) {
+        hasFlash = 1;
+      }
+    }
+    return hasFlash;
+  }
 
-  //expose the callback to the global object:
+  // expose the callback to the global object:
   $$PREBID_GLOBAL$$.TLCB = function(tlResponseObj) {
     if (tlResponseObj && tlResponseObj.callback_id) {
       var bidObj = utils.getBidRequest(tlResponseObj.callback_id);
       var placementCode = bidObj && bidObj.placementCode;
 
       // @if NODE_ENV='debug'
-      if (bidObj) {utils.logMessage('JSONP callback function called for inventory code: ' + bidObj.params.inventoryCode);}
+      if (bidObj) { utils.logMessage('JSONP callback function called for inventory code: ' + bidObj.params.inventoryCode); }
       // @endif
 
       var bid = [];
@@ -95,7 +110,7 @@ var TripleLiftAdapter = function TripleLiftAdapter() {
         bidmanager.addBidResponse(placementCode, bid);
 
       } else {
-        //no response data
+        // no response data
         // @if NODE_ENV='debug'
         if (bidObj) {utils.logMessage('No prebid response from TripleLift for inventory code: ' + bidObj.params.inventoryCode);}
         // @endif
@@ -105,7 +120,7 @@ var TripleLiftAdapter = function TripleLiftAdapter() {
       }
 
     } else {
-      //no response data
+      // no response data
       // @if NODE_ENV='debug'
       utils.logMessage('No prebid response for placement %%PLACEMENT%%');
       // @endif