studiocms/dist/integrations/webVitals/webVitalsSummary.js

Astro Native CMS for AstroDB. Built from the ground up by the Astro community.

function processWebVitalsSummary(data) {
  const grouped = data.reduce(
    (acc, item) => {
      if (!acc[item.name]) acc[item.name] = [];
      acc[item.name].push(item);
      return acc;
    },
    {}
  );
  const summary = {};
  for (const [metricName, metrics] of Object.entries(grouped)) {
    if (metrics.length < 4) continue;
    metrics.sort((a, b) => a.rating.localeCompare(b.rating) || a.value - b.value);
    const quartileSize = Math.ceil(metrics.length / 4);
    for (let i = 0; i < metrics.length; i++) {
      metrics[i].quartile = Math.floor(i / quartileSize) + 1;
    }
    for (let i = 0; i < metrics.length; i++) {
      const nextItem = metrics[i + 1];
      metrics[i].rating_end = !nextItem || nextItem.rating !== metrics[i].rating;
    }
    const sampleSize = metrics.length;
    const histogram = {
      good: 0,
      "needs-improvement": 0,
      poor: 0
    };
    for (let i = 0; i < metrics.length; i++) {
      if (metrics[i].rating_end) {
        const ratingCount = metrics.filter((m) => m.rating === metrics[i].rating).length;
        histogram[metrics[i].rating] = ratingCount / sampleSize;
      }
    }
    const p75Index = Math.floor(metrics.length * 0.75);
    const p75Metric = metrics[p75Index] || null;
    const percentiles = p75Metric ? { p75: { value: p75Metric.value, rating: p75Metric.rating } } : {};
    const finalMetrics = metrics.filter(
      // biome-ignore lint/style/noNonNullAssertion: This is a valid use case for non-null assertion
      (metric) => metric.rating_end || metric.quartile * 25 === 75
    );
    if (finalMetrics.length > 0) {
      summary[metricName] = { histogram, percentiles, sampleSize };
    }
  }
  return summary;
}
export {
  processWebVitalsSummary
};