62 lines
2.5 KiB
Scala
62 lines
2.5 KiB
Scala
package com.twitter.home_mixer.functional_component.scorer
|
|
|
|
import com.twitter.home_mixer.model.HomeFeatures.AuthorIsBlueVerifiedFeature
|
|
import com.twitter.home_mixer.model.HomeFeatures.InNetworkFeature
|
|
import com.twitter.home_mixer.model.HomeFeatures.ScoreFeature
|
|
import com.twitter.home_mixer.param.HomeGlobalParams.BlueVerifiedAuthorInNetworkMultiplierParam
|
|
import com.twitter.home_mixer.param.HomeGlobalParams.BlueVerifiedAuthorOutOfNetworkMultiplierParam
|
|
import com.twitter.product_mixer.component_library.model.candidate.TweetCandidate
|
|
import com.twitter.product_mixer.core.feature.Feature
|
|
import com.twitter.product_mixer.core.feature.featuremap.FeatureMap
|
|
import com.twitter.product_mixer.core.feature.featuremap.FeatureMapBuilder
|
|
import com.twitter.product_mixer.core.functional_component.scorer.Scorer
|
|
import com.twitter.product_mixer.core.model.common.CandidateWithFeatures
|
|
import com.twitter.product_mixer.core.model.common.identifier.ScorerIdentifier
|
|
import com.twitter.product_mixer.core.pipeline.PipelineQuery
|
|
import com.twitter.stitch.Stitch
|
|
|
|
/**
|
|
* Scales scores of tweets whose author is Blue Verified by the provided scale factor
|
|
*/
|
|
object VerifiedAuthorScalingScorer extends Scorer[PipelineQuery, TweetCandidate] {
|
|
|
|
override val identifier: ScorerIdentifier = ScorerIdentifier("VerifiedAuthorScaling")
|
|
|
|
override val features: Set[Feature[_, _]] = Set(ScoreFeature)
|
|
|
|
override def apply(
|
|
query: PipelineQuery,
|
|
candidates: Seq[CandidateWithFeatures[TweetCandidate]]
|
|
): Stitch[Seq[FeatureMap]] = {
|
|
Stitch.value {
|
|
candidates.map { candidate =>
|
|
val score = candidate.features.getOrElse(ScoreFeature, None)
|
|
val updatedScore = getUpdatedScore(score, candidate, query)
|
|
FeatureMapBuilder().add(ScoreFeature, updatedScore).build()
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* We should only be applying this multiplier if the author of the candidate is Blue Verified.
|
|
* We also treat In-Network vs Out-of-Network differently.
|
|
*/
|
|
private def getUpdatedScore(
|
|
score: Option[Double],
|
|
candidate: CandidateWithFeatures[TweetCandidate],
|
|
query: PipelineQuery
|
|
): Option[Double] = {
|
|
val isAuthorBlueVerified = candidate.features.getOrElse(AuthorIsBlueVerifiedFeature, false)
|
|
|
|
if (isAuthorBlueVerified) {
|
|
val isCandidateInNetwork = candidate.features.getOrElse(InNetworkFeature, false)
|
|
|
|
val scaleFactor =
|
|
if (isCandidateInNetwork) query.params(BlueVerifiedAuthorInNetworkMultiplierParam)
|
|
else query.params(BlueVerifiedAuthorOutOfNetworkMultiplierParam)
|
|
|
|
score.map(_ * scaleFactor)
|
|
} else score
|
|
}
|
|
}
|