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import io.circe._, io.circe.parser._, io.circe.generic.auto._
import $ivy.`org.typelevel::cats:0.8.1`, cats.implicits._
import scala.io.Source
case class PageViews(article: String, views: Int)
def getMonthlyViews(project: String, year: Int, month: Int): Map[String, Int] = {
def url: String = {
val monthStr = (if (month < 10) "0" else "") + month
s"https://wikimedia.org/api/rest_v1/metrics/pageviews/top/$project/all-access/$year/$monthStr/all-days"
}
val text = Source.fromURL(url).mkString
val doc = parse(text).getOrElse(Json.Null)
(doc \\ "articles")
.flatMap(_.as[List[PageViews]].getOrElse(Nil))
.map(PageViews.unapply(_).get)
.toMap
}
}
def sumMapValues(maps: Seq[Map[String, Int]]) = maps.foldLeft(Map.empty[String, Int])(_ |+| _)
val monthly = (1 to 12).map { month => getMonthlyViews("uk.wikibooks.org", 2016, month) }
val yearly = sumMapValues(monthly)
val byBook = sumMapValues(
yearly.toSeq.map { case (name, views) => Map(name.split("/").head -> views) }
)
)
val wikiTable = byBook.toSeq.sortBy(-_._2).foreach(println)zipWithIndex.map {
case ((name, views), i) => s"| ${i+1} || [[$name]] || $views"
}.mkString("""{| class = "wikitable"\n""", "\n|-\n", "\n|}")
println(wikiTable)
</source>
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