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