43 lines
1.8 KiB
Scala
43 lines
1.8 KiB
Scala
package com.twitter.home_mixer.functional_component.feature_hydrator
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import com.twitter.home_mixer.model.request.HasListId
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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.feature.Feature
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import com.twitter.product_mixer.core.feature.FeatureWithDefaultOnFailure
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import com.twitter.product_mixer.core.functional_component.feature_hydrator.QueryFeatureHydrator
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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.socialgraph.{thriftscala => sg}
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import com.twitter.stitch.Stitch
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import com.twitter.stitch.socialgraph.SocialGraph
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import javax.inject.Inject
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import javax.inject.Singleton
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case object ListMembersFeature extends FeatureWithDefaultOnFailure[PipelineQuery, Seq[Long]] {
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override val defaultValue: Seq[Long] = Seq.empty
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}
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@Singleton
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class ListMembersQueryFeatureHydrator @Inject() (socialGraph: SocialGraph)
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extends QueryFeatureHydrator[PipelineQuery with HasListId] {
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override val identifier: FeatureHydratorIdentifier = FeatureHydratorIdentifier("ListMembers")
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override val features: Set[Feature[_, _]] = Set(ListMembersFeature)
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private val MaxRecentMembers = 10
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override def hydrate(query: PipelineQuery with HasListId): Stitch[FeatureMap] = {
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val request = sg.IdsRequest(
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relationships = Seq(sg
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.SrcRelationship(query.listId, sg.RelationshipType.ListHasMember, hasRelationship = true)),
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pageRequest = Some(sg.PageRequest(selectAll = Some(true), count = Some(MaxRecentMembers)))
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)
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socialGraph.ids(request).map(_.ids).map { listMembers =>
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FeatureMapBuilder().add(ListMembersFeature, listMembers).build()
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}
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}
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}
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