Core: Add new bidder Kargo

src/main/java/org/prebid/server/bidder/kargo/KargoBidder.java

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+package org.prebid.server.bidder.kargo;
+
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import com.iab.openrtb.request.BidRequest;
+import com.iab.openrtb.response.Bid;
+import com.iab.openrtb.response.BidResponse;
+import com.iab.openrtb.response.SeatBid;
+import io.vertx.core.http.HttpMethod;
+import org.apache.commons.collections4.CollectionUtils;
+import org.prebid.server.bidder.Bidder;
+import org.prebid.server.bidder.kargo.model.KargoExtBid;
+import org.prebid.server.bidder.model.BidderBid;
+import org.prebid.server.bidder.model.BidderCall;
+import org.prebid.server.bidder.model.BidderError;
+import org.prebid.server.bidder.model.HttpRequest;
+import org.prebid.server.bidder.model.Result;
+import org.prebid.server.exception.PreBidException;
+import org.prebid.server.json.DecodeException;
+import org.prebid.server.json.JacksonMapper;
+import org.prebid.server.proto.openrtb.ext.response.BidType;
+import org.prebid.server.util.HttpUtil;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+import java.util.Objects;
+import java.util.stream.Collectors;
+
+public class KargoBidder implements Bidder<BidRequest> {
+
+    private final String endpointUrl;
+    private final JacksonMapper mapper;
+
+    public KargoBidder(String endpointUrl, JacksonMapper mapper) {
+        this.endpointUrl = HttpUtil.validateUrl(Objects.requireNonNull(endpointUrl));
+        this.mapper = Objects.requireNonNull(mapper);
+    }
+
+    @Override
+    public Result<List<HttpRequest<BidRequest>>> makeHttpRequests(BidRequest bidRequest) {
+        return Result.withValue(
+                HttpRequest.<BidRequest>builder()
+                        .method(HttpMethod.POST)
+                        .uri(endpointUrl)
+                        .headers(HttpUtil.headers())
+                        .body(mapper.encodeToBytes(bidRequest))
+                        .payload(bidRequest)
+                        .build());
+    }
+
+    @Override
+    public final Result<List<BidderBid>> makeBids(BidderCall<BidRequest> httpCall, BidRequest bidRequest) {
+        try {
+            final BidResponse bidResponse = mapper.decodeValue(httpCall.getResponse().getBody(), BidResponse.class);
+            return Result.withValues(extractBids(bidResponse));
+        } catch (DecodeException | PreBidException e) {
+            return Result.withError(BidderError.badServerResponse(e.getMessage()));
+        }
+    }
+
+    private List<BidderBid> extractBids(BidResponse bidResponse) {
+        if (bidResponse == null || CollectionUtils.isEmpty(bidResponse.getSeatbid())) {
+            return Collections.emptyList();
+        }
+        return bidsFromResponse(bidResponse);
+    }
+
+    private List<BidderBid> bidsFromResponse(BidResponse bidResponse) {
+        return bidResponse.getSeatbid().stream()
+                .filter(Objects::nonNull)
+                .map(SeatBid::getBid)
+                .filter(Objects::nonNull)
+                .flatMap(Collection::stream)
+                .map(bid -> BidderBid.of(bid, resolvedBidType(bid), bidResponse.getCur()))
+                .collect(Collectors.toList());
+    }
+
+    private BidType resolvedBidType(Bid bid) {
+        final KargoExtBid kargoExtBid = bid.getExt() != null ? getMappedBidExt(bid.getExt()) : null;
+        final String mediaType = kargoExtBid != null ? kargoExtBid.getMediaType() : null;
+
+        if (mediaType == null) {
+            return BidType.banner;
+        }
+
+        switch (mediaType) {
+            case "video":
+                return BidType.video;
+            case "native":
+                return BidType.xNative;
+            default:
+                return BidType.banner;
+        }
+    }
+
+    private KargoExtBid getMappedBidExt(ObjectNode objectNode) {
+        try {
+            return mapper.mapper().convertValue(objectNode, KargoExtBid.class);
+        } catch (IllegalArgumentException e) {
+            return null;
+        }
+    }
+}

src/main/java/org/prebid/server/bidder/kargo/model/KargoExtBid.java

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+package org.prebid.server.bidder.kargo.model;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import lombok.Value;
+
+@Value
+public class KargoExtBid {
+
+    @JsonProperty("mediaType")
+    String mediaType;
+}

src/main/java/org/prebid/server/proto/openrtb/ext/request/kargo/ExtImpKargo.java

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+package org.prebid.server.proto.openrtb.ext.request.kargo;
+
+import lombok.Value;
+
+@Value(staticConstructor = "of")
+public class ExtImpKargo {
+
+    String adSlotID;
+}

src/main/java/org/prebid/server/spring/config/bidder/KargoConfiguration.java

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+package org.prebid.server.spring.config.bidder;
+
+import org.prebid.server.bidder.BidderDeps;
+import org.prebid.server.bidder.kargo.KargoBidder;
+import org.prebid.server.json.JacksonMapper;
+import org.prebid.server.spring.config.bidder.model.BidderConfigurationProperties;
+import org.prebid.server.spring.config.bidder.util.BidderDepsAssembler;
+import org.prebid.server.spring.config.bidder.util.UsersyncerCreator;
+import org.prebid.server.spring.env.YamlPropertySourceFactory;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.PropertySource;
+
+import javax.validation.constraints.NotBlank;
+
+@Configuration
+@PropertySource(value = "classpath:/bidder-config/kargo.yaml", factory = YamlPropertySourceFactory.class)
+public class KargoConfiguration {
+
+    private static final String BIDDER_NAME = "kargo";
+
+    @Bean("kargoConfigurationProperties")
+    @ConfigurationProperties("adapters.kargo")
+    BidderConfigurationProperties configurationProperties() {
+        return new BidderConfigurationProperties();
+    }
+
+    @Bean
+    BidderDeps kargoBidderDeps(BidderConfigurationProperties kargoConfigurationProperties,
+                               @NotBlank @Value("${external-url}") String externalUrl,
+                               JacksonMapper mapper) {
+
+        return BidderDepsAssembler.forBidder(BIDDER_NAME)
+                .withConfig(kargoConfigurationProperties)
+                .usersyncerCreator(UsersyncerCreator.create(externalUrl))
+                .bidderCreator(config -> new KargoBidder(config.getEndpoint(), mapper))
+                .assemble();
+    }
+
+}

src/main/resources/bidder-config/kargo.yaml

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+adapters:
+  kargo:
+    endpoint: https://krk.kargo.com/api/v1/openrtb
+    modifyingVastXmlAllowed: true
+    meta-info:
+      maintainer-email: kraken@kargo.com
+      app-media-types:
+      site-media-types:
+        - banner
+        - video
+        - native
+      supported-vendors:
+      vendor-id: 972
+    usersync:
+      url:
+      redirect-url:
+      cookie-family-name: kargo
+      type: redirect
+      support-cors: false

src/main/resources/static/bidder-params/kargo.json

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+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "title": "Kargo Adapter Params",
+  "description": "A schema which validates params accepted by the Kargo adapter",
+  "type": "object",
+
+  "properties": {
+    "adSlotID": {
+      "type": "string",
+      "description": "An ID which identifies the adslot placement. Equivalent to the id of target inventory, ad unit code, or placement id"
+    }
+  },
+
+  "required": ["adSlotID"]
+}