Pubmatic: Forward displaymanager and displaymanagerver from app ext (p…

…rebid#4000)

adapters/pubmatic/pubmatic.go

@@ -90,6 +90,11 @@ func (a *PubmaticAdapter) MakeRequests(request *openrtb2.BidRequest, reqInfo *ad
 	extractWrapperExtFromImp := true
 	extractPubIDFromImp := true
 
+	displayManager, displayManagerVer := "", ""
+	if request.App != nil && request.App.Ext != nil {
+		displayManager, displayManagerVer = getDisplayManagerAndVer(request.App)
+	}
+
 	newReqExt, err := extractPubmaticExtFromRequest(request)
 	if err != nil {
 		return nil, []error{err}
@@ -100,7 +105,7 @@ func (a *PubmaticAdapter) MakeRequests(request *openrtb2.BidRequest, reqInfo *ad
 	}
 
 	for i := 0; i < len(request.Imp); i++ {
-		wrapperExtFromImp, pubIDFromImp, err := parseImpressionObject(&request.Imp[i], extractWrapperExtFromImp, extractPubIDFromImp)
+		wrapperExtFromImp, pubIDFromImp, err := parseImpressionObject(&request.Imp[i], extractWrapperExtFromImp, extractPubIDFromImp, displayManager, displayManagerVer)
 
 		// If the parsing is failed, remove imp and add the error.
 		if err != nil {
@@ -247,7 +252,7 @@ func assignBannerWidthAndHeight(banner *openrtb2.Banner, w, h int64) *openrtb2.B
 }
 
 // parseImpressionObject parse the imp to get it ready to send to pubmatic
-func parseImpressionObject(imp *openrtb2.Imp, extractWrapperExtFromImp, extractPubIDFromImp bool) (*pubmaticWrapperExt, string, error) {
+func parseImpressionObject(imp *openrtb2.Imp, extractWrapperExtFromImp, extractPubIDFromImp bool, displayManager, displayManagerVer string) (*pubmaticWrapperExt, string, error) {
 	var wrapExt *pubmaticWrapperExt
 	var pubID string
 
@@ -260,6 +265,12 @@ func parseImpressionObject(imp *openrtb2.Imp, extractWrapperExtFromImp, extractP
 		imp.Audio = nil
 	}
 
+	// Populate imp.displaymanager and imp.displaymanagerver if the SDK failed to do it.
+	if imp.DisplayManager == "" && imp.DisplayManagerVer == "" && displayManager != "" && displayManagerVer != "" {
+		imp.DisplayManager = displayManager
+		imp.DisplayManagerVer = displayManagerVer
+	}
+
 	var bidderExt ExtImpBidderPubmatic
 	if err := jsonutil.Unmarshal(imp.Ext, &bidderExt); err != nil {
 		return wrapExt, pubID, err
@@ -656,3 +667,19 @@ func Builder(bidderName openrtb_ext.BidderName, config config.Adapter, server co
 	}
 	return bidder, nil
 }
+
+// getDisplayManagerAndVer returns the display manager and version from the request.app.ext or request.app.prebid.ext source and version
+func getDisplayManagerAndVer(app *openrtb2.App) (string, string) {
+	if source, err := jsonparser.GetString(app.Ext, openrtb_ext.PrebidExtKey, "source"); err == nil && source != "" {
+		if version, err := jsonparser.GetString(app.Ext, openrtb_ext.PrebidExtKey, "version"); err == nil && version != "" {
+			return source, version
+		}
+	}
+
+	if source, err := jsonparser.GetString(app.Ext, "source"); err == nil && source != "" {
+		if version, err := jsonparser.GetString(app.Ext, "version"); err == nil && version != "" {
+			return source, version
+		}
+	}
+	return "", ""
+}