the-algorithm/product-mixer/component-library/src/main/scala/com/twitter/product_mixer/component_library/candidate_source/timeline_ranker/TimelineRankerRecapCandidateSource.scala
twitter-team ef4c5eb65e Twitter Recommendation Algorithm
Please note we have force-pushed a new initial commit in order to remove some publicly-available Twitter user information. Note that this process may be required in the future.
2023-03-31 17:36:31 -05:00

29 lines
1.0 KiB
Scala

package com.twitter.product_mixer.component_library.candidate_source.timeline_ranker
import com.twitter.product_mixer.core.functional_component.candidate_source.CandidateSource
import com.twitter.product_mixer.core.model.common.identifier.CandidateSourceIdentifier
import com.twitter.stitch.Stitch
import com.twitter.timelineranker.{thriftscala => t}
import javax.inject.Inject
import javax.inject.Singleton
@Singleton
class TimelineRankerRecapCandidateSource @Inject() (
timelineRankerClient: t.TimelineRanker.MethodPerEndpoint)
extends CandidateSource[t.RecapQuery, t.CandidateTweet] {
override val identifier: CandidateSourceIdentifier =
CandidateSourceIdentifier("TimelineRankerRecap")
override def apply(
request: t.RecapQuery
): Stitch[Seq[t.CandidateTweet]] = {
Stitch
.callFuture(timelineRankerClient.getRecapCandidatesFromAuthors(Seq(request)))
.map { response: Seq[t.GetCandidateTweetsResponse] =>
response.headOption.flatMap(_.candidates).getOrElse(Seq.empty).filter(_.tweet.nonEmpty)
}
}
}