New Adapter: Zemanta (prebid#1774)

* add zemanta adapter

* update openrtb package for zemanta

* fix loop iterator reference bug

* fix getMediaTypeForImp to match server behavior

adapters/zemanta/params_test.go

@@ -0,0 +1,50 @@
+package zemanta
+
+import (
+	"encoding/json"
+	"testing"
+
+	"github.com/prebid/prebid-server/openrtb_ext"
+)
+
+func TestValidParams(t *testing.T) {
+	validator, err := openrtb_ext.NewBidderParamsValidator("../../static/bidder-params")
+	if err != nil {
+		t.Fatalf("Failed to fetch the json schema. %v", err)
+	}
+
+	for _, p := range validParams {
+		if err := validator.Validate(openrtb_ext.BidderZemanta, json.RawMessage(p)); err != nil {
+			t.Errorf("Schema rejected valid params: %s", p)
+		}
+	}
+}
+
+func TestInvalidParams(t *testing.T) {
+	validator, err := openrtb_ext.NewBidderParamsValidator("../../static/bidder-params")
+	if err != nil {
+		t.Fatalf("Failed to fetch the json schema. %v", err)
+	}
+
+	for _, p := range invalidParams {
+		if err := validator.Validate(openrtb_ext.BidderZemanta, json.RawMessage(p)); err == nil {
+			t.Errorf("Schema allowed invalid params: %s", p)
+		}
+	}
+}
+
+var validParams = []string{
+	`{"publisher": {"id": "publisher-id"}}`,
+	`{"publisher": {"id": "publisher-id", "name": "publisher-name", "domain": "publisher-domain.com"}, "tagid": "tag-id", "bcat": ["bad-category"], "badv": ["bad-advertiser"]}`,
+}
+
+var invalidParams = []string{
+	`{"publisher": {"id": 1234}}`,
+	`{"publisher": {"id": "pub-id", "name": 1234}}`,
+	`{"publisher": {"id": "pub-id", "domain": 1234}}`,
+	`{"publisher": {"id": "pub-id"}, "tagid": 1234}`,
+	`{"publisher": {"id": "pub-id"}, "bcat": "not-array"}`,
+	`{"publisher": {"id": "pub-id"}, "bcat": [1234]}`,
+	`{"publisher": {"id": "pub-id"}, "badv": "not-array"}`,
+	`{"publisher": {"id": "pub-id"}, "badv": [1234]}`,
+}

adapters/zemanta/usersync.go

@@ -0,0 +1,12 @@
+package zemanta
+
+import (
+	"text/template"
+
+	"github.com/prebid/prebid-server/adapters"
+	"github.com/prebid/prebid-server/usersync"
+)
+
+func NewZemantaSyncer(temp *template.Template) usersync.Usersyncer {
+	return adapters.NewSyncer("zemanta", temp, adapters.SyncTypeRedirect)
+}

adapters/zemanta/usersync_test.go

@@ -0,0 +1,33 @@
+package zemanta
+
+import (
+	"testing"
+	"text/template"
+
+	"github.com/prebid/prebid-server/privacy"
+	"github.com/prebid/prebid-server/privacy/ccpa"
+	"github.com/prebid/prebid-server/privacy/gdpr"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestSyncer(t *testing.T) {
+	syncURL := "http://prebidtest.zemanta.com/usersync/prebidtest?gdpr={{.GDPR}}&gdpr_consent={{.GDPRConsent}}&us_privacy={{.USPrivacy}}&cb=host%2Fsetuid%3Fbidder%3Dzemanta%26uid%3D__ZUID__"
+	syncURLTemplate := template.Must(
+		template.New("sync-template").Parse(syncURL),
+	)
+
+	syncer := NewZemantaSyncer(syncURLTemplate)
+	syncInfo, err := syncer.GetUsersyncInfo(privacy.Policies{
+		GDPR: gdpr.Policy{
+			Signal:  "A",
+			Consent: "B",
+		},
+		CCPA: ccpa.Policy{
+			Consent: "C",
+		},
+	})
+
+	assert.NoError(t, err)
+	assert.Equal(t, "http://prebidtest.zemanta.com/usersync/prebidtest?gdpr=A&gdpr_consent=B&us_privacy=C&cb=host%2Fsetuid%3Fbidder%3Dzemanta%26uid%3D__ZUID__", syncInfo.URL)
+	assert.Equal(t, "redirect", syncInfo.Type)
+}

adapters/zemanta/zemanta.go

@@ -0,0 +1,147 @@
+package zemanta
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+
+	"github.com/mxmCherry/openrtb/v14/openrtb2"
+	"github.com/prebid/prebid-server/adapters"
+	"github.com/prebid/prebid-server/config"
+	"github.com/prebid/prebid-server/errortypes"
+	"github.com/prebid/prebid-server/openrtb_ext"
+)
+
+type adapter struct {
+	endpoint string
+}
+
+// Builder builds a new instance of the Zemanta adapter for the given bidder with the given config.
+func Builder(bidderName openrtb_ext.BidderName, config config.Adapter) (adapters.Bidder, error) {
+	bidder := &adapter{
+		endpoint: config.Endpoint,
+	}
+	return bidder, nil
+}
+
+func (a *adapter) MakeRequests(request *openrtb2.BidRequest, requestInfo *adapters.ExtraRequestInfo) ([]*adapters.RequestData, []error) {
+	reqCopy := *request
+
+	var errs []error
+	var zemantaExt openrtb_ext.ExtImpZemanta
+	for i := 0; i < len(reqCopy.Imp); i++ {
+		imp := reqCopy.Imp[i]
+
+		var bidderExt adapters.ExtImpBidder
+		if err := json.Unmarshal(imp.Ext, &bidderExt); err != nil {
+			errs = append(errs, err)
+			continue
+		}
+		if err := json.Unmarshal(bidderExt.Bidder, &zemantaExt); err != nil {
+			errs = append(errs, err)
+			continue
+		}
+		imp.TagID = zemantaExt.TagId
+		reqCopy.Imp[i] = imp
+	}
+
+	publisher := &openrtb2.Publisher{
+		ID:     zemantaExt.Publisher.Id,
+		Name:   zemantaExt.Publisher.Name,
+		Domain: zemantaExt.Publisher.Domain,
+	}
+	if reqCopy.Site != nil {
+		siteCopy := *reqCopy.Site
+		siteCopy.Publisher = publisher
+		reqCopy.Site = &siteCopy
+	} else if reqCopy.App != nil {
+		appCopy := *reqCopy.App
+		appCopy.Publisher = publisher
+		reqCopy.App = &appCopy
+	}
+
+	if zemantaExt.BCat != nil {
+		reqCopy.BCat = zemantaExt.BCat
+	}
+	if zemantaExt.BAdv != nil {
+		reqCopy.BAdv = zemantaExt.BAdv
+	}
+
+	requestJSON, err := json.Marshal(reqCopy)
+	if err != nil {
+		errs = append(errs, err)
+		return nil, errs
+	}
+
+	requestData := &adapters.RequestData{
+		Method: "POST",
+		Uri:    a.endpoint,
+		Body:   requestJSON,
+	}
+
+	return []*adapters.RequestData{requestData}, nil
+}
+
+func (a *adapter) MakeBids(request *openrtb2.BidRequest, requestData *adapters.RequestData, responseData *adapters.ResponseData) (*adapters.BidderResponse, []error) {
+	if responseData.StatusCode == http.StatusNoContent {
+		return nil, nil
+	}
+
+	if responseData.StatusCode == http.StatusBadRequest {
+		err := &errortypes.BadInput{
+			Message: "Unexpected status code: 400. Bad request from publisher. Run with request.debug = 1 for more info.",
+		}
+		return nil, []error{err}
+	}
+
+	if responseData.StatusCode != http.StatusOK {
+		err := &errortypes.BadServerResponse{
+			Message: fmt.Sprintf("Unexpected status code: %d. Run with request.debug = 1 for more info.", responseData.StatusCode),
+		}
+		return nil, []error{err}
+	}
+
+	var response openrtb2.BidResponse
+	if err := json.Unmarshal(responseData.Body, &response); err != nil {
+		return nil, []error{err}
+	}
+
+	bidResponse := adapters.NewBidderResponseWithBidsCapacity(len(request.Imp))
+	bidResponse.Currency = response.Cur
+
+	var errs []error
+	for _, seatBid := range response.SeatBid {
+		for i := range seatBid.Bid {
+			bid := seatBid.Bid[i]
+			bidType, err := getMediaTypeForImp(bid.ImpID, request.Imp)
+			if err != nil {
+				errs = append(errs, err)
+				continue
+			}
+
+			b := &adapters.TypedBid{
+				Bid:     &bid,
+				BidType: bidType,
+			}
+			bidResponse.Bids = append(bidResponse.Bids, b)
+		}
+	}
+
+	return bidResponse, errs
+}
+
+func getMediaTypeForImp(impID string, imps []openrtb2.Imp) (openrtb_ext.BidType, error) {
+	for _, imp := range imps {
+		if imp.ID == impID {
+			if imp.Native != nil {
+				return openrtb_ext.BidTypeNative, nil
+			} else if imp.Banner != nil {
+				return openrtb_ext.BidTypeBanner, nil
+			}
+		}
+	}
+
+	return "", &errortypes.BadInput{
+		Message: fmt.Sprintf("Failed to find native/banner impression \"%s\" ", impID),
+	}
+}

adapters/zemanta/zemanta_test.go

@@ -0,0 +1,20 @@
+package zemanta
+
+import (
+	"testing"
+
+	"github.com/prebid/prebid-server/adapters/adapterstest"
+	"github.com/prebid/prebid-server/config"
+	"github.com/prebid/prebid-server/openrtb_ext"
+)
+
+func TestJsonSamples(t *testing.T) {
+	bidder, buildErr := Builder(openrtb_ext.BidderZemanta, config.Adapter{
+		Endpoint: "http://example.com/bid"})
+
+	if buildErr != nil {
+		t.Fatalf("Builder returned unexpected error %v", buildErr)
+	}
+
+	adapterstest.RunJSONBidderTest(t, "zemantatest", bidder)
+}