[node] begin the great typescript rewrite

1 files changed, 52 insertions, 0 deletions

diff --git a/nodejs/database/db.ts b/nodejs/database/db.ts
new file mode 100644
index 0000000..247ee5a
--- /dev/null
+++ b/nodejs/database/db.ts
@@ -0,0 +1,52 @@
+import fs from 'fs';
+import Database from 'better-sqlite3';
+
+const allMigrations = [
+	'database/000_init.sql',
+	'database/001_systems.sql',
+	'database/002_ships.sql',
+	'database/003_surveys.sql',
+	'database/004_markets.sql',
+];
+
+const db = new Database(
+	process.env.NODE_ENV === 'test' ? 'test.db' : 'spacetraders.db',
+	process.env.NODE_ENV === 'development' ? { verbose: console.log } : undefined
+);
+db.pragma('foreign_keys = ON');
+db.pragma('journal_mode = WAL');
+
+function init() {
+	db.transaction(function migrate() {
+		let version;
+		try {
+			const res = db.prepare('SELECT version FROM schema_version').get() as {version: number};
+			version = res.version;
+		} catch {
+			version = 0;
+		}
+		if (version === allMigrations.length) return;
+		while (version < allMigrations.length) {
+			db.exec(fs.readFileSync(allMigrations[version], 'utf8'));
+			version++;
+		}
+		db.exec(`DELETE FROM schema_version; INSERT INTO schema_version (version) VALUES (${version});`);
+	})();
+}
+
+export function reset() {
+	const indices = db.prepare(`SELECT name FROM sqlite_master WHERE type = 'index';`).all() as Array<{name: string}>;
+	const tables = db.prepare(`SELECT name FROM sqlite_master WHERE type = 'table';`).all() as Array<{name: string}>;
+	const triggers = db.prepare(`SELECT name FROM sqlite_master WHERE type = 'trigger';`).all() as Array<{name: string}>;
+	const views = db.prepare(`SELECT name FROM sqlite_master WHERE type = 'view';`).all() as Array<{name: string}>;
+	indices.forEach(elt => db.exec(`DROP INDEX ${elt.name};`));
+	tables.forEach(elt => db.exec(`DROP TABLE ${elt.name};`));
+	triggers.forEach(elt => db.exec(`DROP TRIGGER ${elt.name};`));
+	views.forEach(elt => db.exec(`DROP VIEW ${elt.name};`));
+	db.exec(`VACUUM;`);
+	init();
+}
+
+init();
+
+export default db;