[node] finished the great typescript rewrite

nodejs/database/systems.ts

@@ -0,0 +1,51 @@
+import { DbData, db } from './db.ts';
+import { System, Waypoint } from '../model/system.ts';
+
+const addSystemStatement = db.prepare(`INSERT INTO systems(data) VALUES (json(?));`);
+const getSystemStatement = db.prepare(`SELECT data FROM systems WHERE data->>'symbol' = ?;`);
+const getSystemUpdatedStatement = db.prepare(`SELECT updated FROM systems WHERE data->>'symbol' = ?;`);
+const getSystemsCountStatement = db.prepare(`SELECT COUNT(data) as data FROM systems;`);
+const setSystemStatement = db.prepare(`UPDATE systems SET data = json(:data), updated = :date WHERE data->>'symbol' = :symbol;`);
+const setSystemWaypointsStatement = db.prepare(`UPDATE systems SET data = (SELECT json_set(data, '$.waypoints', json(:waypoints)) FROM systems WHERE data->>'symbol' = :symbol), updated = :date WHERE data->>'symbol' = :symbol;`);
+
+export function addSystem(data: System): void {
+	addSystemStatement.run(JSON.stringify(data)).lastInsertRowid;
+}
+
+export function getSystem(symbol: string): System|null {
+	const data = getSystemStatement.get(symbol) as DbData|undefined;
+	if (!data) return null;
+	return JSON.parse(data.data);
+}
+
+export function getSystemsCount(): number {
+	const data = getSystemsCountStatement.get() as number|undefined;
+	if (!data) return 0;
+	return data;
+}
+
+export function getSystemUpdated(symbol: string): Date|null {
+	const data = getSystemUpdatedStatement.get(symbol) as {updated: Date}|undefined;
+	if (!data) return null;
+	return data.updated;
+}
+
+export function setSystem(data: System): void {
+	if (getSystem(data.symbol) === null) {
+		addSystem(data);
+	} else {
+		setSystemStatement.run({
+			data: JSON.stringify(data),
+			date: new Date().toISOString(),
+			symbol: data.symbol,
+		});
+	}
+}
+
+export function setSystemWaypoints(symbol: string, waypoints: Array<Waypoint>): void {
+	setSystemWaypointsStatement.run({
+		date: new Date().toISOString(),
+		symbol: symbol,
+		waypoints: JSON.stringify(waypoints),
+	});
+}