Add Sharethrough adapter

adapters.json

@@ -35,6 +35,7 @@
     "underdogmedia",
     "memeglobal",
     "centro",
+    "sharethrough",
     "roxot",
     "vertoz",
     {

src/adapters/sharethrough.js

@@ -0,0 +1,149 @@
+var utils = require('../utils.js');
+var bidmanager = require('../bidmanager.js');
+var bidfactory = require('../bidfactory.js');
+
+const STR_BIDDER_CODE = "sharethrough";
+const STR_VERSION = "0.1.0";
+
+var SharethroughAdapter = function SharethroughAdapter() {
+
+  const str = {};
+  str.STR_BTLR_HOST = document.location.protocol + "//btlr.sharethrough.com";
+  str.STR_TEST_HOST =  document.location.protocol + "//btlr-prebid-test.sharethrough.com";
+  str.STR_BEACON_HOST = document.location.protocol + "//b.sharethrough.com/butler?";
+  str.placementCodeSet = {};
+
+  function _callBids(params) {
+    const bids = params.bids;
+
+    $$PREBID_GLOBAL$$.onEvent('bidWon', str.bidWon);
+
+    addEventListener("message", _receiveMessage, false);
+
+    // cycle through bids
+    for (let i = 0; i < bids.length; i += 1) {
+      const bidRequest = bids[i];
+      str.placementCodeSet[bidRequest.placementCode] = bidRequest;
+      const scriptUrl = _buildSharethroughCall(bidRequest);
+      str.loadIFrame(scriptUrl);
+    }
+  }
+
+  function _buildSharethroughCall(bid) {
+    const testPkey = 'test';
+    const pkey = utils.getBidIdParameter('pkey', bid.params);
+
+    let host = (pkey === testPkey) ? str.STR_TEST_HOST : str.STR_BTLR_HOST;
+
+    let url = host + "/header-bid/v1?";
+    url = utils.tryAppendQueryString(url, 'bidId', bid.bidId);
+
+    if(pkey !== testPkey) {
+      url = utils.tryAppendQueryString(url, 'placement_key', pkey);
+      url = utils.tryAppendQueryString(url, 'ijson', '$$PREBID_GLOBAL$$.strcallback');
+      url = appendEnvFields(url);
+    } else {
+      url = url.substring(0, url.length - 1);
+    }
+
+    return url;
+  }
+
+  str.loadIFrame = function(url) {
+    const iframe = document.createElement("iframe");
+    iframe.src = url;
+    iframe.style.cssText = 'display:none;';
+
+    document.body.appendChild(iframe);
+  };
+
+  function _receiveMessage(event) {
+    if(event.origin === str.STR_BTLR_HOST || event.origin === str.STR_TEST_HOST) {
+      $$PREBID_GLOBAL$$.strcallback(JSON.parse(event.data).response);
+    }
+  }
+
+  $$PREBID_GLOBAL$$.strcallback = function(bidResponse) {
+    const bidId = bidResponse.bidId;
+    const bidObj = utils.getBidRequest(bidId);
+    try {
+      const bid = bidfactory.createBid(1, bidObj);
+
+      bid.bidderCode = 'sharethrough';
+      bid.cpm = bidResponse.creatives[0].cpm;
+      const size = bidObj.sizes[0];
+      bid.width = size[0];
+      bid.height = size[1];
+      bid.adserverRequestId = bidResponse.adserverRequestId;
+      str.placementCodeSet[bidObj.placementCode].adserverRequestId = bidResponse.adserverRequestId;
+      bid.winId = bidResponse.creatives[0].auctionWinId;
+
+      bid.pkey = utils.getBidIdParameter('pkey', bidObj.params);
+
+      const windowLocation = `str_response_${bidId}`;
+      const bidJsonString = JSON.stringify(bidResponse);
+      bid.ad = `<div data-str-native-key="${bid.pkey}" data-stx-response-name='${windowLocation}'>
+                </div>
+                <script>var ${windowLocation} = ${bidJsonString}</script>
+                <script src="//native.sharethrough.com/assets/sfp-set-targeting.js"></script>
+                <script type='text/javascript'>
+                (function() {
+                    var sfp_js = document.createElement('script');
+                    sfp_js.src = "//native.sharethrough.com/assets/sfp.js";
+                    sfp_js.type = 'text/javascript';
+                    sfp_js.charset = 'utf-8';
+                    window.top.document.getElementsByTagName('body')[0].appendChild(sfp_js);
+                })();
+                </script>`;
+      bidmanager.addBidResponse(bidObj.placementCode, bid);
+    } catch (e) {
+      _handleInvalidBid(bidObj);
+    }
+  };
+
+  function _handleInvalidBid(bidObj) {
+    const bid = bidfactory.createBid(2, bidObj);
+    bidmanager.addBidResponse(bidObj.placementCode, bid);
+  }
+
+  str.bidWon = function() {
+    const curBidderCode = arguments[0].bidderCode;
+
+    if(curBidderCode !== STR_BIDDER_CODE && (arguments[0].adUnitCode in str.placementCodeSet)) {
+      let strBid = str.placementCodeSet[arguments[0].adUnitCode];
+      str.fireLoseBeacon(curBidderCode, arguments[0].cpm, strBid.adserverRequestId, "headerBidLose");
+    }
+  };
+
+  str.fireLoseBeacon = function(winningBidderCode, winningCPM, arid, type) {
+    let loseBeaconUrl = str.STR_BEACON_HOST;
+    loseBeaconUrl = utils.tryAppendQueryString(loseBeaconUrl, "winnerBidderCode", winningBidderCode);
+    loseBeaconUrl = utils.tryAppendQueryString(loseBeaconUrl, "winnerCpm", winningCPM);
+    loseBeaconUrl = utils.tryAppendQueryString(loseBeaconUrl, "arid", arid);
+    loseBeaconUrl = utils.tryAppendQueryString(loseBeaconUrl, "type", type);
+    loseBeaconUrl = appendEnvFields(loseBeaconUrl);
+
+    str.fireBeacon(loseBeaconUrl);
+  };
+
+  function appendEnvFields(url) {
+    url = utils.tryAppendQueryString(url, 'hbVersion', '$prebid.version$');
+    url = utils.tryAppendQueryString(url, 'strVersion', STR_VERSION);
+    url = utils.tryAppendQueryString(url, 'hbSource', 'prebid');
+
+    return url;
+  }
+
+  str.fireBeacon = function(theUrl) {
+    const img = new Image();
+    img.src = theUrl;
+  };
+
+  return {
+    callBids: _callBids,
+    str : str,
+  };
+};
+
+module.exports = SharethroughAdapter;
+