Add CO₂ data to your
travel management system.

// SAP Concur → Carbon API integration
// Triggered via Concur Trips v2 webhook on TripApproved event

async function onConcurTripApproved(event) {
  const { segments } = event.trip.itinerary;

  const results = await Promise.all(
    segments.map(seg =>
      fetch("https://aviation-api.logostream.dev/v1/carbon", {
        method: "POST",
        headers: {
          "x-api-key": process.env.AVIATION_API_KEY,
          "Content-Type": "application/json",
        },
        body: JSON.stringify({
          from:        seg.OriginLocation,       // IATA code from Concur
          to:          seg.DestinationLocation,   // IATA code from Concur
          cabin_class: mapConcurCabin(seg.ClassOfService),
          passengers:  1,
          aircraft:    seg.Equipment ?? undefined, // e.g. "359", "77W"
        }),
      }).then(r => r.json())
    )
  );

  // Store per-segment CO₂ linked to your booking ID
  await db.tripEmissions.insertMany(
    results.map((r, i) => ({
      booking_id:    event.trip.id,
      employee_id:   event.trip.userId,
      segment_index: i,
      co2_kg:        r.sustainability_metrics.passenger_footprint.co2_kg,
      co2_rfi_kg:    r.sustainability_metrics.passenger_footprint.co2_with_rfi_kg,
      confidence:    r.confidence_score,
      methodology:   r.sustainability_metrics.methodology,
    }))
  );
}

function mapConcurCabin(classOfService) {
  if (["F", "A", "P"].includes(classOfService)) return "first";
  if (["C", "J", "D", "I"].includes(classOfService)) return "business";
  if (["W", "S"].includes(classOfService)) return "premium_economy";
  return "economy";
}