31 lines
1.3 KiB
Scala
31 lines
1.3 KiB
Scala
package com.twitter.home_mixer.functional_component.filter
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import com.twitter.home_mixer.model.HomeFeatures.ServedTweetPreviewIdsFeature
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import com.twitter.product_mixer.component_library.model.candidate.TweetCandidate
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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.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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object PreviouslyServedTweetPreviewsFilter extends Filter[PipelineQuery, TweetCandidate] {
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override val identifier: FilterIdentifier = FilterIdentifier("PreviouslyServedTweetPreviews")
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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[FilterResult[TweetCandidate]] = {
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val servedTweetPreviewIds =
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query.features.map(_.getOrElse(ServedTweetPreviewIdsFeature, Seq.empty)).toSeq.flatten.toSet
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val (removed, kept) = candidates.partition { candidate =>
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servedTweetPreviewIds.contains(candidate.candidate.id)
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}
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Stitch.value(FilterResult(kept = kept.map(_.candidate), removed = removed.map(_.candidate)))
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}
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}
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