lila/app/templating/NumberHelper.scala

package lila.app
package templating

import java.text.NumberFormat
import java.util.Locale
import play.api.i18n.Lang
import scala.collection.mutable

trait NumberHelper { self: I18nHelper =>

  private val formatters = mutable.AnyRefMap.empty[String, NumberFormat]

  private def formatter(implicit lang: Lang): NumberFormat =
    formatters.getOrElseUpdate(
      lang.language,
      NumberFormat getInstance new Locale(lang.language)
    )

  def showMillis(millis: Int)(implicit lang: Lang) = formatter.format((millis / 100).toDouble / 10)

  implicit final class RichInt(number: Int) {
    def localize(implicit lang: Lang): String = formatter format number
  }

  implicit final class RichLong(number: Long) {
    def localize(implicit lang: Lang): String = formatter format number
  }
}