42 lines
2.0 KiB
Scala
42 lines
2.0 KiB
Scala
package com.twitter.home_mixer.functional_component.feature_hydrator
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import com.twitter.home_mixer.model.HomeFeatures.AuthorIdFeature
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import com.twitter.home_mixer.model.HomeFeatures.InNetworkFeature
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import com.twitter.product_mixer.component_library.feature_hydrator.query.social_graph.SGSFollowedUsersFeature
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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.feature_hydrator.BulkCandidateFeatureHydrator
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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.FeatureHydratorIdentifier
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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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object InNetworkFeatureHydrator
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extends BulkCandidateFeatureHydrator[PipelineQuery, TweetCandidate] {
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override val identifier: FeatureHydratorIdentifier = FeatureHydratorIdentifier("InNetwork")
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override val features: Set[Feature[_, _]] = Set(InNetworkFeature)
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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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val viewerId = query.getRequiredUserId
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val followedUserIds = query.features.get.get(SGSFollowedUsersFeature).toSet
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val featureMaps = candidates.map { candidate =>
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// We use authorId and not sourceAuthorId here so that retweets are defined as in network
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val isInNetworkOpt = candidate.features.getOrElse(AuthorIdFeature, None).map { authorId =>
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// Users cannot follow themselves but this is in network by definition
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val isSelfTweet = authorId == viewerId
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isSelfTweet || followedUserIds.contains(authorId)
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}
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FeatureMapBuilder().add(InNetworkFeature, isInNetworkOpt.getOrElse(true)).build()
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}
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Stitch.value(featureMaps)
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}
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}
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