Added cut down script and fixed how data is fetched

index.js

@@ -20,7 +20,17 @@ app.use('/rep', async (req, res) => {
 
     if (!lat || !lon) return
 
-    const f = fs.readFileSync(path.join(__dirname, 'public/circonscriptions-legislatives.json'), 'utf-8')
+    const closestCity = await fetch(
+        `https://geo.api.gouv.fr/communes?lat=${lat}&lon=${lon}`
+    );
+    const body = await closestCity.json();
+    let codeDepartement = String(body[0]?.codeDepartement)
+
+    if (!codeDepartement || codeDepartement === "") return
+
+    codeDepartement = codeDepartement.padStart(3, "0");
+
+    const f = fs.readFileSync(path.join(__dirname, `public/cirs/${codeDepartement}.json`), 'utf-8')
     const data = JSON.parse(f)
 
     gl = new GeoJsonGeometriesLookup(data)
@@ -42,12 +52,47 @@ app.use('/rep', async (req, res) => {
     const repFile = fs.readFileSync(path.join(__dirname, `public/reps/${lookupTable[code]}.json`), 'utf-8')
 
     res.end(repFile)
+})
+
+app.listen(PORT, () => console.log(`Server listening on port: ${PORT}`));
+
+/**
+* CUT DOWN CIRCO JSON
+*/
+// const f = fs.readFileSync(path.join(__dirname, 'public/circonscriptions-legislatives.json'), 'utf-8')
+// const data = JSON.parse(f)
+
+// const features = Object.values(data.features)
+
+// const departements = groupBy(features, e => e.properties['REF'].substring(0, 3));
+
+// for (const [key, value] of departements.entries()) {
+//     const output = {
+//         "type": "FeatureCollection",
+//         "crs": { "type": "name", "properties": { "name": "urn:ogc:def:crs:OGC:1.3:CRS84" } },
+//         "features": value
+//     }
+//     fs.writeFileSync(path.join(__dirname, `public/cirs/${key}.json`), JSON.stringify(output))
+// }
+
+// function groupBy(list, keyGetter) {
+//     const map = new Map();
+//     list.forEach((item) => {
+//          const key = keyGetter(item);
+//          const collection = map.get(key);
+//          if (!collection) {
+//              map.set(key, [item]);
+//          } else {
+//              collection.push(item);
+//          }
+//     });
+//     return map;
+// }
 
 /**
 * GENERATE INITIAL DATA
 * Basically a bad crawler made in an hour
 */
-
 // const output = {}
 
 // for (let i = 500; i < lookupTable.length; i++) {
@@ -81,6 +126,3 @@ app.use('/rep', async (req, res) => {
 // }
 
 // res.json(output)
-})
-
-app.listen(PORT, () => console.log(`Server listening on port: ${PORT}`));