mirror of
https://github.com/twitter/the-algorithm.git
synced 2024-06-02 17:28:45 +02:00
43 lines
1.8 KiB
Scala
43 lines
1.8 KiB
Scala
|
package com.twitter.home_mixer.functional_component.feature_hydrator
|
||
|
|
||
|
import com.twitter.home_mixer.model.request.HasListId
|
||
|
import com.twitter.product_mixer.core.feature.featuremap.FeatureMap
|
||
|
import com.twitter.product_mixer.core.feature.featuremap.FeatureMapBuilder
|
||
|
import com.twitter.product_mixer.core.feature.Feature
|
||
|
import com.twitter.product_mixer.core.feature.FeatureWithDefaultOnFailure
|
||
|
import com.twitter.product_mixer.core.functional_component.feature_hydrator.QueryFeatureHydrator
|
||
|
import com.twitter.product_mixer.core.model.common.identifier.FeatureHydratorIdentifier
|
||
|
import com.twitter.product_mixer.core.pipeline.PipelineQuery
|
||
|
import com.twitter.socialgraph.{thriftscala => sg}
|
||
|
import com.twitter.stitch.Stitch
|
||
|
import com.twitter.stitch.socialgraph.SocialGraph
|
||
|
|
||
|
import javax.inject.Inject
|
||
|
import javax.inject.Singleton
|
||
|
|
||
|
case object ListMembersFeature extends FeatureWithDefaultOnFailure[PipelineQuery, Seq[Long]] {
|
||
|
override val defaultValue: Seq[Long] = Seq.empty
|
||
|
}
|
||
|
|
||
|
@Singleton
|
||
|
class ListMembersQueryFeatureHydrator @Inject() (socialGraph: SocialGraph)
|
||
|
extends QueryFeatureHydrator[PipelineQuery with HasListId] {
|
||
|
|
||
|
override val identifier: FeatureHydratorIdentifier = FeatureHydratorIdentifier("ListMembers")
|
||
|
|
||
|
override val features: Set[Feature[_, _]] = Set(ListMembersFeature)
|
||
|
|
||
|
private val MaxRecentMembers = 10
|
||
|
|
||
|
override def hydrate(query: PipelineQuery with HasListId): Stitch[FeatureMap] = {
|
||
|
val request = sg.IdsRequest(
|
||
|
relationships = Seq(sg
|
||
|
.SrcRelationship(query.listId, sg.RelationshipType.ListHasMember, hasRelationship = true)),
|
||
|
pageRequest = Some(sg.PageRequest(selectAll = Some(true), count = Some(MaxRecentMembers)))
|
||
|
)
|
||
|
socialGraph.ids(request).map(_.ids).map { listMembers =>
|
||
|
FeatureMapBuilder().add(ListMembersFeature, listMembers).build()
|
||
|
}
|
||
|
}
|
||
|
}
|