[node] begin the great typescript rewrite

nodejs/database/ships.ts

@@ -0,0 +1,55 @@
+import db from './db.ts';
+import { Cargo } from '../model/cargo.ts';
+import { Fuel, Nav, Ship } from '../model/ship.ts';
+
+const addShipStatement = db.prepare(`INSERT INTO ships(data) VALUES (json(?));`);
+const getShipStatement = db.prepare(`SELECT data FROM ships WHERE data->>'symbol' = ?;`);
+const getShipsAtStatement = db.prepare(`SELECT data FROM ships WHERE data->>'$.nav.systemSymbol' = ?;`);
+const setShipCargoStatement = db.prepare(`UPDATE ships SET data = (SELECT json_set(data, '$.cargo', json(:cargo)) FROM ships WHERE data->>'symbol' = :symbol) WHERE data->>'symbol' = :symbol;`);
+const setShipFuelStatement = db.prepare(`UPDATE ships SET data = (SELECT json_set(data, '$.fuel', json(:fuel)) FROM ships WHERE data->>'symbol' = :symbol) WHERE data->>'symbol' = :symbol;`);
+const setShipNavStatement = db.prepare(`UPDATE ships SET data = (SELECT json_set(data, '$.nav', json(:nav)) FROM ships WHERE data->>'symbol' = :symbol) WHERE data->>'symbol' = :symbol;`);
+const updateShipStatement = db.prepare(`UPDATE ships SET data = json(:data) WHERE data->>'symbol' = :symbol;`);
+
+export function getShip(symbol: string): Ship|null {
+	const data = getShipStatement.get(symbol) as {data: string}|undefined;
+	if (!data) return null;
+	return JSON.parse(data.data);
+}
+
+export function getShipsAt(symbol: string) {
+	const data = getShipsAtStatement.all(symbol) as Array<{data: string}>;
+	return data.map(elt => JSON.parse(elt.data));
+}
+
+
+export function setShip(data: Ship) {
+	if (getShip(data.symbol) === null) {
+		addShipStatement.run(JSON.stringify(data));
+	} else {
+		updateShipStatement.run({
+			data: JSON.stringify(data),
+			symbol: data.symbol,
+		});
+	}
+}
+
+export function setShipCargo(symbol: string, cargo: Cargo) {
+	setShipCargoStatement.run({
+		cargo: JSON.stringify(cargo),
+		symbol: symbol,
+	});
+}
+
+export function setShipFuel(symbol: string, fuel: Fuel) {
+	setShipFuelStatement.run({
+		fuel: JSON.stringify(fuel),
+		symbol: symbol,
+	});
+}
+
+export function setShipNav(symbol: string, nav: Nav) {
+	setShipNavStatement.run({
+		nav: JSON.stringify(nav),
+		symbol: symbol,
+	});
+}