85 lines
3.9 KiB
Scala
85 lines
3.9 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.ConversationModuleFocalTweetIdFeature
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import com.twitter.home_mixer.model.HomeFeatures.ConversationModuleIdFeature
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import com.twitter.home_mixer.model.HomeFeatures.FocalTweetAuthorIdFeature
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import com.twitter.home_mixer.model.HomeFeatures.FocalTweetInNetworkFeature
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import com.twitter.home_mixer.model.HomeFeatures.FocalTweetRealNamesFeature
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import com.twitter.home_mixer.model.HomeFeatures.FocalTweetScreenNamesFeature
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import com.twitter.home_mixer.model.HomeFeatures.InNetworkFeature
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import com.twitter.home_mixer.model.HomeFeatures.RealNamesFeature
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import com.twitter.home_mixer.model.HomeFeatures.ScreenNamesFeature
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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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import javax.inject.Inject
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import javax.inject.Singleton
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/**
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* Social context for convo modules is hydrated on the root Tweet but needs info about the focal
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* Tweet (e.g. author) to render the banner. This hydrator copies focal Tweet data into the root.
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*/
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@Singleton
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class FocalTweetFeatureHydrator @Inject() ()
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extends BulkCandidateFeatureHydrator[PipelineQuery, TweetCandidate] {
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override val identifier: FeatureHydratorIdentifier = FeatureHydratorIdentifier("FocalTweet")
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override val features: Set[Feature[_, _]] = Set(
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FocalTweetAuthorIdFeature,
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FocalTweetInNetworkFeature,
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FocalTweetRealNamesFeature,
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FocalTweetScreenNamesFeature
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)
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private val DefaultFeatureMap = FeatureMapBuilder()
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.add(FocalTweetAuthorIdFeature, None)
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.add(FocalTweetInNetworkFeature, None)
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.add(FocalTweetRealNamesFeature, None)
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.add(FocalTweetScreenNamesFeature, None)
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.build()
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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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// Build a map of all the focal tweets to their corresponding features
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val focalTweetIdToFeatureMap = candidates.flatMap { candidate =>
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val focalTweetId = candidate.features.getOrElse(ConversationModuleFocalTweetIdFeature, None)
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if (focalTweetId.contains(candidate.candidate.id)) {
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Some(candidate.candidate.id -> candidate.features)
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} else None
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}.toMap
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val updatedFeatureMap = candidates.map { candidate =>
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val focalTweetId = candidate.features.getOrElse(ConversationModuleFocalTweetIdFeature, None)
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val conversationId = candidate.features.getOrElse(ConversationModuleIdFeature, None)
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// Check if the candidate is a root tweet and ensure its focal tweet's features are available
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if (conversationId.contains(candidate.candidate.id)
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&& focalTweetId.exists(focalTweetIdToFeatureMap.contains)) {
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val featureMap = focalTweetIdToFeatureMap.get(focalTweetId.get).get
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FeatureMapBuilder()
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.add(FocalTweetAuthorIdFeature, featureMap.getOrElse(AuthorIdFeature, None))
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.add(FocalTweetInNetworkFeature, Some(featureMap.getOrElse(InNetworkFeature, true)))
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.add(
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FocalTweetRealNamesFeature,
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Some(featureMap.getOrElse(RealNamesFeature, Map.empty[Long, String])))
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.add(
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FocalTweetScreenNamesFeature,
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Some(featureMap.getOrElse(ScreenNamesFeature, Map.empty[Long, String])))
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.build()
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} else DefaultFeatureMap
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}
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Stitch.value(updatedFeatureMap)
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}
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}
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