Rewrote the api rate limiter with promises instead of callbacks

database/systems.js

@@ -0,0 +1,26 @@
+import db from './db.js';
+
+const getSystemStatement = db.prepare(`SELECT data from systems where symbol = ?;`);
+const setSystemStatement = db.prepare(`INSERT INTO systems(symbol, data) VALUES (?, ?);`);
+
+export function getSystem(symbol) {
+	try {
+		const data = getSystemStatement.get(symbol);
+		if (data === undefined) {
+			return null;
+		}
+		return JSON.parse(data.data);
+	} catch (err) {
+		console.log(err);
+		return null;
+	}
+}
+
+export function setSystem(symbol, data) {
+	try {
+		return setSystemStatement.run(symbol, JSON.stringify(data)).lastInsertRowid;
+	} catch (err) {
+		console.log(err);
+		return null;
+	}
+}