New Adapter: MeloZen

adapters/melozen/melozen.go

@@ -0,0 +1,185 @@
+package melozen
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"strings"
+	"text/template"
+
+	"github.com/prebid/openrtb/v20/openrtb2"
+	"github.com/prebid/prebid-server/v2/adapters"
+	"github.com/prebid/prebid-server/v2/config"
+	"github.com/prebid/prebid-server/v2/errortypes"
+	"github.com/prebid/prebid-server/v2/macros"
+	"github.com/prebid/prebid-server/v2/openrtb_ext"
+)
+
+type adapter struct {
+	endpointTemplate *template.Template
+}
+
+// Builder builds a new instance of the {bidder} adapter for the given bidder with the given config.
+func Builder(bidderName openrtb_ext.BidderName, config config.Adapter, server config.Server) (adapters.Bidder, error) {
+	template, err := template.New("endpointTemplate").Parse(config.Endpoint)
+	if err != nil {
+		return nil, fmt.Errorf("unable to parse endpoint url template: %v", err)
+	}
+
+	bidder := &adapter{
+		endpointTemplate: template,
+	}
+
+	return bidder, nil
+}
+
+func (a *adapter) MakeRequests(request *openrtb2.BidRequest, reqInfo *adapters.ExtraRequestInfo) ([]*adapters.RequestData, []error) {
+	var requests []*adapters.RequestData
+	var errors []error
+	headers := http.Header{}
+	headers.Add("Content-Type", "application/json;charset=utf-8")
+	headers.Add("Accept", "application/json")
+
+	requestCopy := *request
+	for _, imp := range request.Imp {
+		// Extract Melozen Params
+		var strImpExt adapters.ExtImpBidder
+		if err := json.Unmarshal(imp.Ext, &strImpExt); err != nil {
+			errors = append(errors, err)
+			continue
+		}
+		var strImpParams openrtb_ext.ImpExtMeloZen
+		if err := json.Unmarshal(strImpExt.Bidder, &strImpParams); err != nil {
+			errors = append(errors, err)
+			continue
+		}
+
+		url, err := macros.ResolveMacros(a.endpointTemplate, macros.EndpointTemplateParams{PublisherID: strImpParams.PubId})
+		if err != nil {
+			errors = append(errors, err)
+			continue
+		}
+		// Convert Floor into USD
+		if imp.BidFloor > 0 && imp.BidFloorCur != "" && !strings.EqualFold(imp.BidFloorCur, "USD") {
+			convertedValue, err := reqInfo.ConvertCurrency(imp.BidFloor, imp.BidFloorCur, "USD")
+			if err != nil {
+				errors = append(errors, err)
+				continue
+			}
+			imp.BidFloorCur = "USD"
+			imp.BidFloor = convertedValue
+		}
+
+		impressionsByMediaType, err := splitImpressionsByMediaType(&imp)
+		if err != nil {
+			errors = append(errors, err)
+			continue
+		}
+
+		for _, impression := range impressionsByMediaType {
+			requestCopy.Imp = []openrtb2.Imp{impression}
+
+			requestJSON, err := json.Marshal(requestCopy)
+			if err != nil {
+				errors = append(errors, err)
+				continue
+			}
+
+			requestData := &adapters.RequestData{
+				Method:  "POST",
+				Uri:     url,
+				Body:    requestJSON,
+				Headers: headers,
+				ImpIDs:  openrtb_ext.GetImpIDs(requestCopy.Imp),
+			}
+			requests = append(requests, requestData)
+		}
+	}
+
+	return requests, errors
+}
+
+func (a *adapter) MakeBids(request *openrtb2.BidRequest, requestData *adapters.RequestData, response *adapters.ResponseData) (*adapters.BidderResponse, []error) {
+	if adapters.IsResponseStatusCodeNoContent(response) {
+		return nil, nil
+	}
+
+	if err := adapters.CheckResponseStatusCodeForErrors(response); err != nil {
+		return nil, []error{err}
+	}
+
+	var bidReq openrtb2.BidRequest
+	if err := json.Unmarshal(requestData.Body, &bidReq); err != nil {
+		return nil, []error{err}
+	}
+
+	var bidResp openrtb2.BidResponse
+	if err := json.Unmarshal(response.Body, &bidResp); err != nil {
+		return nil, []error{err}
+	}
+
+	bidderResponse := adapters.NewBidderResponse()
+	var errors []error
+	for _, seatBid := range bidResp.SeatBid {
+		for i := range seatBid.Bid {
+			bid := &seatBid.Bid[i]
+			bidType, err := getMediaTypeForBid(*bid)
+			if err != nil {
+				errors = append(errors, err)
+				continue
+			}
+
+			bidderResponse.Bids = append(bidderResponse.Bids, &adapters.TypedBid{
+				BidType: bidType,
+				Bid:     bid,
+			})
+		}
+	}
+	return bidderResponse, errors
+}
+
+func splitImpressionsByMediaType(impression *openrtb2.Imp) ([]openrtb2.Imp, error) {
+	if impression.Banner == nil && impression.Native == nil && impression.Video == nil {
+		return nil, &errortypes.BadInput{Message: "Invalid MediaType. MeloZen only supports Banner, Video and Native."}
+	}
+
+	impressions := make([]openrtb2.Imp, 0, 2)
+
+	if impression.Banner != nil {
+		impCopy := *impression
+		impCopy.Video = nil
+		impCopy.Native = nil
+		impressions = append(impressions, impCopy)
+	}
+
+	if impression.Video != nil {
+		impCopy := *impression
+		impCopy.Banner = nil
+		impCopy.Native = nil
+		impressions = append(impressions, impCopy)
+	}
+
+	if impression.Native != nil {
+		impCopy := *impression
+		impCopy.Banner = nil
+		impCopy.Video = nil
+		impressions = append(impressions, impCopy)
+	}
+
+	return impressions, nil
+}
+
+func getMediaTypeForBid(bid openrtb2.Bid) (openrtb_ext.BidType, error) {
+
+	if bid.Ext != nil {
+		var bidExt openrtb_ext.ExtBid
+		err := json.Unmarshal(bid.Ext, &bidExt)
+		if err == nil && bidExt.Prebid != nil {
+			return openrtb_ext.ParseBidType(string(bidExt.Prebid.Type))
+		}
+	}
+
+	return "", &errortypes.BadServerResponse{
+		Message: fmt.Sprintf("Failed to parse bid mediatype for impression \"%s\"", bid.ImpID),
+	}
+}

adapters/melozen/melozen_test.go

@@ -0,0 +1,30 @@
+package melozen
+
+import (
+	"testing"
+
+	"github.com/prebid/prebid-server/v2/adapters/adapterstest"
+	"github.com/prebid/prebid-server/v2/config"
+	"github.com/prebid/prebid-server/v2/openrtb_ext"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestJsonSamples(t *testing.T) {
+
+	bidder, buildErr := Builder(openrtb_ext.BidderMeloZen, config.Adapter{
+		Endpoint: "https://example.com/rtb/v2/bid?publisher_id={{.PublisherID}}",
+	}, config.Server{ExternalUrl: "http://hosturl.com", GvlID: 1, DataCenter: "2"})
+
+	if buildErr != nil {
+		t.Fatalf("Builder returned unexpected error %v", buildErr)
+	}
+
+	adapterstest.RunJSONBidderTest(t, "melozentest", bidder)
+}
+
+func TestEndpointTemplateMalformed(t *testing.T) {
+	_, buildErr := Builder(openrtb_ext.BidderMeloZen, config.Adapter{
+		Endpoint: "{{Malformed}}"}, config.Server{ExternalUrl: "http://hosturl.com", GvlID: 1, DataCenter: "2"})
+
+	assert.Error(t, buildErr)
+}

adapters/melozen/melozentest/exemplary/app-banner.json

@@ -0,0 +1,132 @@
+{
+    "mockBidRequest": {
+      "id": "web-banner",
+      "tmax": 3000,
+      "imp": [
+        {
+          "id": "banner-imp-id",
+          "ext": {
+            "bidder": {
+                "pubId": "386276e072"
+            }
+          },
+          "banner": {
+            "format": [
+              {
+                "w": 300,
+                "h": 250
+              }
+            ]
+          }
+        }
+      ],
+      "app": {
+        "bundle": "com.fake.app",
+        "publisher": {
+          "id": "42",
+          "name": "whatever.pub"
+        }
+      },
+      "device": {
+        "w": 1200,
+        "h": 900
+      }
+    },
+    "httpCalls": [
+      {
+        "expectedRequest": {
+          "uri": "https://example.com/rtb/v2/bid?publisher_id=386276e072",
+          "headers": {
+            "Content-Type": ["application/json;charset=utf-8"],
+            "Accept": ["application/json"]
+          },
+          "body": {
+            "id": "web-banner",
+            "tmax": 3000,
+            "imp": [
+              {
+                "id": "banner-imp-id",
+                "ext": {
+                  "bidder": {
+                    "pubId": "386276e072"
+                  }
+                },
+                "banner": {
+                  "format": [
+                    {
+                      "w": 300,
+                      "h": 250
+                    }
+                  ]
+                }
+              }
+            ],
+            "device": {
+              "w": 1200,
+              "h": 900
+            },
+            "app": {
+              "bundle": "com.fake.app",
+              "publisher": {
+                "id": "42",
+                "name": "whatever.pub"
+              }
+            }
+          },
+          "impIDs":["banner-imp-id"]
+        },
+        "mockResponse": {
+          "status": 200,
+          "body": {
+            "id": "web-banner",
+            "cur": "USD",
+            "seatbid": [
+              {
+                "bid": [
+                  {
+                    "id": "web-banner",
+                    "impid": "banner-imp-id",
+                    "crid": "some-creative-id",
+                    "adm": "<div>Ad</div>",
+                    "price": 20,
+                    "w": 300,
+                    "h": 250,
+                    "ext": {
+                      "prebid": {
+                        "type": "banner"
+                      }
+                    }
+                  }
+                ]
+              }
+            ]
+          }
+        }
+      }
+    ],
+    "expectedBidResponses": [
+      {
+        "currency": "USD",
+        "bids": [
+          {
+            "bid": {
+              "id": "web-banner",
+              "impid": "banner-imp-id",
+              "crid": "some-creative-id",
+              "adm": "<div>Ad</div>",
+              "price": 20,
+              "w": 300,
+              "h": 250,
+              "ext": {
+                "prebid": {
+                  "type": "banner"
+                }
+              }
+            },
+            "type": "banner"
+          }
+        ]
+      }
+    ]
+  }
+