Submitting EMX Digital Adapter (prebid#3173)

* Submitting EMX Digital Prebid Adapter

Submitting EMX Digital Prebid Adapter code

* fixing lint errors. updating our md

* updating to const/let variables. adding test spec.

* fixed linting on test spec js

modules/emx_digitalBidAdapter.js

@@ -0,0 +1,108 @@
+import * as utils from 'src/utils';
+import {
+  registerBidder
+} from 'src/adapters/bidderFactory';
+import {
+  BANNER
+} from 'src/mediaTypes';
+import {
+  config
+} from 'src/config';
+
+const BIDDER_CODE = 'emx_digital';
+const ENDPOINT = 'hb.emxdgt.com';
+export const spec = {
+  code: BIDDER_CODE,
+  supportedMediaTypes: [BANNER],
+  isBidRequestValid: function (bid) {
+    return !!(bid.params.tagid);
+  },
+  buildRequests: function (validBidRequests, bidRequests) {
+    const {host, href, protocol} = utils.getTopWindowLocation();
+    let emxData = {};
+    let emxImps = [];
+    const auctionId = bidRequests.auctionId;
+    const timeout = config.getConfig('bidderTimeout');
+    const timestamp = Date.now();
+    const url = location.protocol + '//' + ENDPOINT + ('?t=' + timeout + '&ts=' + timestamp);
+
+    utils._each(validBidRequests, function (bid) {
+      let tagId = String(utils.getBidIdParameter('tagid', bid.params));
+      let bidFloor = utils.getBidIdParameter('bidfloor', bid.params) || 0;
+      let emxBid = {
+        id: bid.bidId,
+        tid: bid.transactionId,
+        tagid: tagId,
+        secure: protocol === 'https:' ? 1 : 0,
+        banner: {
+          format: bid.sizes.map(function (size) {
+            return {
+              w: size[0],
+              h: size[1]
+            };
+          }),
+          w: bid.sizes[0][0],
+          h: bid.sizes[0][1]
+        }
+      }
+      if (bidFloor > 0) {
+        emxBid.bidfloor = bidFloor
+      }
+      emxImps.push(emxBid);
+    });
+    emxData = {
+      id: auctionId,
+      imp: emxImps,
+      site: {
+        domain: host,
+        page: href
+      }
+    };
+    if (bidRequests.gdprConsent) {
+      emxData.regs = {
+        ext: {
+          gdpr: bidRequests.gdprConsent.gdprApplies === true ? 1 : 0
+        }
+      };
+    }
+    if (bidRequests.gdprConsent && bidRequests.gdprConsent.gdprApplies) {
+      emxData.user = {
+        ext: {
+          consent: bidRequests.gdprConsent.consentString
+        }
+      };
+    }
+    return {
+      method: 'POST',
+      url: url,
+      data: JSON.stringify(emxData),
+      options: {
+        withCredentials: true
+      }
+    };
+  },
+  interpretResponse: function (serverResponse) {
+    let emxBidResponses = [];
+    let response = serverResponse.body || {};
+    if (response.seatbid && response.seatbid.length > 0 && response.seatbid[0].bid) {
+      response.seatbid.forEach(function (emxBid) {
+        emxBid = emxBid.bid[0];
+        emxBidResponses.push({
+          requestId: emxBid.id,
+          cpm: emxBid.price,
+          width: emxBid.w,
+          height: emxBid.h,
+          creativeId: emxBid.crid || emxBid.id,
+          dealId: emxBid.dealid || null,
+          currency: 'USD',
+          netRevenue: true,
+          mediaType: BANNER,
+          ad: decodeURIComponent(emxBid.adm),
+          ttl: emxBid.ttl
+        });
+      });
+    }
+    return emxBidResponses;
+  }
+};
+registerBidder(spec);

modules/emx_digitalBidAdapter.md

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+# Overview
+
+```
+Module Name:  EMX Digital Adapter
+Module Type:  Bidder Adapter
+Maintainer: git@emxdigital.com
+```
+
+# Description
+
+The EMX Digital adapter provides publishers with access to the EMX Marketplace. The adapter is GDPR compliant. Please note that the adapter supports Banner media type only.
+
+Note: The EMX Digital adapter requires approval and implementation guidelines from the EMX team, including existing publishers that work with EMX Digital. Please reach out to your account manager or prebid@emxdigital.com for more information.
+
+The bidder code should be ```emx_digital```
+The params used by the bidder are :
+```tagid``` - string (mandatory)
+```bidfloor``` - string (optional)
+
+# Test Parameters
+```
+var adUnits = [{
+    code: 'banner-div',
+    mediaTypes: {
+        banner: {
+            sizes: [ 
+                [300, 250], [300, 600]
+        }
+    },
+    bids: [
+    {
+        bidder: 'emx_digital',
+        params: {
+           tagid: '25251',
+        }
+    }]
+}];
+```