Create osm_data_fetcher.js

backend/apis/nodejs/src/utils/osm_data_fetcher.js

@@ -0,0 +1,17 @@
+const OsmRateLimiter = {
+    lastFetchTime: 0,
+
+    canFetch: function () {
+        return Date.now() - this.lastFetchTime >= 1000;
+    },
+
+    updateFetchTime: function () {
+        this.lastFetchTime = Date.now();
+    }
+};
+
+function retrieveCitiesFullName(name){
+    if (!OsmRateLimiter.canFetch()) {
+        // todo
+    }
+}