chore: initial Observable workspace with technical README

docs/data/in-n-out-ca-overpass.json.js

@@ -0,0 +1,118 @@
+const query = `
+[out:json][timeout:120];
+area["ISO3166-2"="US-CA"][admin_level=4]->.searchArea;
+(
+  node["amenity"="fast_food"]["brand"="In-N-Out Burger"](area.searchArea);
+  way["amenity"="fast_food"]["brand"="In-N-Out Burger"](area.searchArea);
+  relation["amenity"="fast_food"]["brand"="In-N-Out Burger"](area.searchArea);
+  node["amenity"="fast_food"]["name"~"In-N-Out",i](area.searchArea);
+  way["amenity"="fast_food"]["name"~"In-N-Out",i](area.searchArea);
+  relation["amenity"="fast_food"]["name"~"In-N-Out",i](area.searchArea);
+);
+out center tags;
+`;
+
+function normalizeStores(elements) {
+  const stores = elements
+    .map((element) => {
+      const lat = Number(element.lat ?? element.center?.lat);
+      const lon = Number(element.lon ?? element.center?.lon);
+      if (!Number.isFinite(lat) || !Number.isFinite(lon)) return null;
+
+      const tags = element.tags ?? {};
+      const name = tags.name || "In-N-Out Burger";
+      const city = tags["addr:city"] || "Ville inconnue";
+      const street = tags["addr:street"] || "";
+      const housenumber = tags["addr:housenumber"] || "";
+      const postcode = tags["addr:postcode"] || "";
+
+      return {
+        id: `${element.type}/${element.id}`,
+        latitude: lat,
+        longitude: lon,
+        name,
+        city,
+        address: [housenumber, street].filter(Boolean).join(" "),
+        postcode,
+      };
+    })
+    .filter(Boolean);
+
+  const dedup = new Map();
+  for (const store of stores) {
+    const key = `${store.latitude.toFixed(5)},${store.longitude.toFixed(5)}`;
+    if (!dedup.has(key)) dedup.set(key, store);
+  }
+
+  return Array.from(dedup.values());
+}
+
+async function fetchFromOverpass() {
+  const endpoints = [
+    "https://overpass-api.de/api/interpreter",
+    "https://overpass.kumi.systems/api/interpreter",
+    "https://overpass.openstreetmap.fr/api/interpreter",
+  ];
+
+  for (const endpoint of endpoints) {
+    try {
+      const response = await fetch(endpoint, {
+        method: "POST",
+        headers: {
+          "content-type": "application/x-www-form-urlencoded;charset=UTF-8",
+        },
+        body: new URLSearchParams({ data: query }),
+      });
+
+      if (!response.ok) continue;
+
+      const payload = await response.json();
+      const elements = Array.isArray(payload.elements) ? payload.elements : [];
+      const stores = normalizeStores(elements);
+      if (stores.length >= 50) return stores;
+    } catch {}
+  }
+
+  return null;
+}
+
+async function fetchFallbackCsv() {
+  const url =
+    "https://raw.githubusercontent.com/madmao/castle-compass/master/csv/In%20N%20Out.csv";
+  const response = await fetch(url);
+  if (!response.ok)
+    throw new Error(`Fallback CSV request failed: ${response.status}`);
+
+  const lines = (await response.text()).split(/\r?\n/).filter(Boolean);
+  const stores = lines
+    .map((line, index) => {
+      const [latRaw, lonRaw] = line.split(",");
+      const latitude = Number(latRaw);
+      const longitude = Number(lonRaw);
+      if (!Number.isFinite(latitude) || !Number.isFinite(longitude))
+        return null;
+
+      const inCaliforniaBounds =
+        latitude >= 32 &&
+        latitude <= 42.5 &&
+        longitude >= -125 &&
+        longitude <= -114;
+      if (!inCaliforniaBounds) return null;
+
+      return {
+        id: `fallback/${index}`,
+        latitude,
+        longitude,
+        name: "In-N-Out Burger",
+        city: "Ville inconnue",
+        address: "",
+        postcode: "",
+      };
+    })
+    .filter(Boolean);
+
+  return stores;
+}
+
+const stores = (await fetchFromOverpass()) ?? (await fetchFallbackCsv());
+process.stdout.write(JSON.stringify(stores));