From d9dfb4ae822ad779198a61c644a3e19dbc91bd71 Mon Sep 17 00:00:00 2001
From: artem <artem@webart-tech.ru>
Date: Fri, 18 Sep 2026 21:02:24 +0300
Subject: [PATCH] =?UTF-8?q?=D0=BF=D0=BE=D1=81=D1=82=D0=BE=D0=B5=D0=BD?=
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---
 src/services/roadSnap.ts | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 src/services/roadSnap.ts

diff --git a/src/services/roadSnap.ts b/src/services/roadSnap.ts
new file mode 100644
index 0000000..82ad997
--- /dev/null
+++ b/src/services/roadSnap.ts
@@ -0,0 +1,23 @@
+/**
+ * Привязывает точку к ближайшей дороге через GraphHopper Cloud API.
+ * Free tier: 2000 req/день, без API key.
+ * Fallback: если API недоступен — возвращает исходные координаты.
+ */
+export async function snapToRoad(
+  lon: number,
+  lat: number,
+): Promise<[number, number]> {
+  try {
+    const res = await fetch(
+      `https://graphhopper.com/api/1/snap?point=${lat},${lon}&layers=road`,
+    );
+    if (!res.ok) return [lon, lat];
+    const data: { points: { lat: number; lon: number }[] } = await res.json();
+    if (data.points && data.points.length > 0) {
+      return [data.points[0].lon, data.points[0].lat];
+    }
+    return [lon, lat];
+  } catch {
+    return [lon, lat];
+  }
+}