Hello Typescript!

hydro/service/db.ts

@@ -0,0 +1,23 @@
+import mongodb from 'mongodb';
+import * as bus from './bus';
+import options from '../options';
+
+let mongourl = 'mongodb://';
+if (options.username) mongourl += `${options.username}:${options.password}@`;
+mongourl += `${options.host}:${options.port}/${options.name}`;
+
+export let db: mongodb.Db = null;
+
+mongodb.MongoClient.connect(mongourl, { useNewUrlParser: true, useUnifiedTopology: true })
+    .then((Client) => {
+        db = Client.db(options.name);
+        bus.publish('system_database_connected', null);
+    });
+
+export function collection(c: string) {
+    return db.collection(c);
+}
+
+global.Hydro.service.db = { collection };
+
+export default { collection };