feat(backend): Databank initialiseren

Verbinding met databank aangemaakt, eerste entities toegevoegd, centrale API aangemaakt om omgevingsvariabelen voor onze app op te vragen.

backend/src/orm.ts

@@ -1,6 +1,19 @@
 import { MikroORM } from '@mikro-orm/core';
 import config from './mikro-orm.config.js';
+import {EnvVars, getEnvVar} from "./util/envvars";
 
 export default async function initORM() {
-    await MikroORM.init(config);
+    const orm = await MikroORM.init(config);
+
+    // Update the database scheme if necessary and enabled.
+    if (getEnvVar(EnvVars.DbUpdate)) {
+        await orm.schema.updateSchema();
+    } else {
+        const diff = await orm.schema.getUpdateSchemaSQL();
+        if (diff) {
+            throw Error("The database structure needs to be updated in order to fit the new database structure " +
+                "of the app. In order to do so automatically, set the environment variable DWENGO_DB_UPDATE to true. " +
+                "The following queries will then be executed:\n" + diff)
+        }
+    }
 }