initial commit

server/getDatabase.js

@@ -0,0 +1,33 @@
+import knex from 'knex';
+import config from "../config.js";
+
+let database = null;
+let lastFailed = null;
+
+/**
+ * @return {Knex}
+ */
+export default function getDatabase() {
+    if (database) {
+        return database;
+    }
+
+    if (lastFailed && (new Date().getTime() - lastFailed.getTime() < 60000)) {
+        // attempt to reconnect every 1 minute, not more frequently
+        return;
+    }
+
+    try {
+        console.log('connecting db');
+        database = knex({
+            ...config.database,
+        });
+        lastFailed = null;
+        return database;
+    } catch (e) {
+        console.error("Cannot connect to database". e);
+        database = null;
+        lastFailed = new Date();
+        return null;
+    }
+};