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• gdk-scala_2.11
• 0.0.3
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• RecoArticleInImpression.scala

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com.gravity.gdk.reco.RecoArticleInImpression.scala Maven / Gradle / Ivy

package com.gravity.gdk.reco

import com.gravity.gdk.article.ArticleKey
import play.api.libs.functional.syntax._
import play.api.libs.json._

/*
              ___...---''
  ___...---'\'___
''       _.-''  _`'.______\\.
        /_.)  )..-  __..--'\\
       (    __..--''
        '-''\@


 Ⓐ Ⓐ Ⓐ Ⓐ Ⓐ Ⓐ Ⓐ Ⓐ Ⓐ Ⓐ Ⓐ
*/

/**
  * A [[RecoArticle]] that appeared in an impression (namely, has an index in an ordered set of recommended articles).
  * This is generally internal use only.
  */
case class RecoArticleInImpression(key: ArticleKey, displayIndex: Int, articleImpressionSlug: String)

object RecoArticleInImpression {
  def fromArticleList(articles: List[RecoArticle]): List[RecoArticleInImpression] = for {
    (article, i) <- articles.zipWithIndex
  } yield RecoArticleInImpression(article.articleId, i, article.articleImpressionSlug)

  private[gdk] implicit val jsonFormatter = (
    (__ \ "articleId").format[ArticleKey] and
    (__ \ "displayIndex").format[Int] and
    (__ \ "encodedArticleImpressionSlug").format[String]
  )(RecoArticleInImpression.apply, unlift(RecoArticleInImpression.unapply))
}