Import initial : code en production sur Hetzner

server/api/compare.post.ts

@@ -0,0 +1,97 @@
+import { z } from 'zod'
+import { EMISSION_FACTORS } from '#shared/emissions'
+import { thin } from '#shared/polyline'
+import { estimateTrainTrip } from '../utils/estimate'
+import type { Coord } from '#shared/types'
+
+const BodySchema = z.object({
+  from: z.object({ lat: z.number(), lon: z.number() }),
+  to: z.object({ lat: z.number(), lon: z.number() }),
+})
+
+interface OrsResponse {
+  features: Array<{
+    properties: { summary: { distance: number, duration: number } }
+    geometry: { coordinates: Coord[] }
+  }>
+}
+
+/** Interroge OpenRouteService pour un profil donne. */
+async function route(profile: string, body: unknown, key: string) {
+  const data = await $fetch<OrsResponse>(
+    `https://api.openrouteservice.org/v2/directions/${profile}/geojson`,
+    {
+      method: 'POST',
+      headers: {
+        Authorization: key,
+        // ORS refuse de repondre si on n'annonce pas accepter ce format precis.
+        Accept: 'application/geo+json',
+      },
+      body,
+    },
+  )
+
+  const feature = data.features[0]
+  if (!feature) throw new Error('Itinéraire introuvable')
+
+  return {
+    km: feature.properties.summary.distance / 1000,
+    min: feature.properties.summary.duration / 60,
+    // ORS renvoie deja du GeoJSON [lon, lat] : rien a decoder, juste a alleger.
+    geometry: thin(feature.geometry.coordinates, 800),
+  }
+}
+
+const unavailable = (mode: string, reason: string) => ({ mode, unavailable: true, reason })
+
+export default defineEventHandler(async (event) => {
+  const parsed = BodySchema.safeParse(await readBody(event))
+  if (!parsed.success) {
+    throw createError({ statusCode: 400, statusMessage: 'Départ ou arrivée invalide.' })
+  }
+
+  const { from, to } = parsed.data
+  const { orsApiKey } = useRuntimeConfig(event)
+  const body = { coordinates: [[from.lon, from.lat], [to.lon, to.lat]] }
+
+  // allSettled et non all : un fournisseur en panne ne doit pas vider la page.
+  const [car, bike, pt] = await Promise.allSettled([
+    route('driving-car', body, orsApiKey),
+    route('cycling-regular', body, orsApiKey),
+    publicTransport(from, to, new Date()),
+  ])
+
+  const options = []
+
+  options.push(car.status === 'fulfilled'
+    ? {
+        mode: 'electric_car',
+        distanceKm: Math.round(car.value.km * 10) / 10,
+        durationMin: Math.round(car.value.min),
+        co2Grams: Math.round(car.value.km * EMISSION_FACTORS.electric_car),
+        geometry: car.value.geometry,
+      }
+    : unavailable('electric_car', 'Aucune route carrossable trouvée.'))
+
+  options.push(bike.status === 'fulfilled'
+    ? {
+        mode: 'bike',
+        distanceKm: Math.round(bike.value.km * 10) / 10,
+        durationMin: Math.round(bike.value.min),
+        co2Grams: 0,
+        geometry: bike.value.geometry,
+      }
+    : unavailable('bike', 'Aucun itinéraire cyclable trouvé.'))
+
+  if (pt.status === 'fulfilled') {
+    options.push(pt.value.train ?? estimateTrainTrip(from, to))
+    options.push(pt.value.bus ?? unavailable('bus', 'Pas de ligne régulière.'))
+  }
+  else {
+    options.push(unavailable('train', 'Horaires indisponibles.'))
+    options.push(unavailable('bus', 'Horaires indisponibles.'))
+  }
+
+  return options.sort((a, b) =>
+    ('co2Grams' in a ? a.co2Grams : Infinity) - ('co2Grams' in b ? b.co2Grams : Infinity))
+})