app/metrics/Charts.scala

package metrics

import models.{Chart, ChartTimeSerie}
import org.joda.time.DateTime
import utils.DateUtils

object Charts {

  def charts(
      instanceCountHistory: List[(DateTime, Double)],
      age25thPercentileHistory: List[(DateTime, Double)],
      age50thPercentileHistory: List[(DateTime, Double)],
      age75thPercentileHistory: List[(DateTime, Double)]
  ): List[Chart] = {
    List(
      Chart(
        "Instances with out-of-date AMI",
        List(ChartTimeSerie("Old instances count", instanceCountHistory))
      ),
      Chart(
        "Age of AMIs (Percentiles)",
        List(
          ChartTimeSerie(
            "25th percentile",
            age25thPercentileHistory,
            "#4d94ff"
          ),
          ChartTimeSerie(
            "50th percentile",
            age50thPercentileHistory,
            "#3385ff"
          ),
          ChartTimeSerie(
            "75th percentile",
            age75thPercentileHistory,
            "#1a75ff"
          ),
          ChartTimeSerie(
            "Freshness goal",
            age25thPercentileHistory.map { case (d, v) =>
              (d, DateUtils.freshnessLimit.toDouble)
            },
            "green"
          )
        )
      )
    )
  }

}