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28 lines
1.1 KiB
Scala
28 lines
1.1 KiB
Scala
package com.twitter.home_mixer.functional_component.filter
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import com.twitter.product_mixer.core.functional_component.filter.Filter
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import com.twitter.product_mixer.core.functional_component.filter.FilterResult
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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.UniversalNoun
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import com.twitter.product_mixer.core.model.common.identifier.FilterIdentifier
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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 com.twitter.timelines.configapi.FSBoundedParam
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case class DropMaxCandidatesFilter[Candidate <: UniversalNoun[Any]](
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maxCandidatesParam: FSBoundedParam[Int])
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extends Filter[PipelineQuery, Candidate] {
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override val identifier: FilterIdentifier = FilterIdentifier("DropMaxCandidates")
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override def apply(
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query: PipelineQuery,
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candidates: Seq[CandidateWithFeatures[Candidate]]
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): Stitch[FilterResult[Candidate]] = {
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val maxCandidates = query.params(maxCandidatesParam)
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val (kept, removed) = candidates.map(_.candidate).splitAt(maxCandidates)
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Stitch.value(FilterResult(kept, removed))
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}
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}
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