base for csv export

src/helpers/authorize.ts

@@ -89,7 +89,9 @@ function key (req, next): any {  // checks API key and returns changed user obje
         if (err) return next(err);
         if (data.length === 1) {  // one user found
           resolve({level: data[0].level, name: data[0].name, id: data[0]._id.toString(), location: data[0].location});
-          delete req.query.key;  // delete query parameter to avoid interference with later validation
+          if (!/^\/api/m.test(req.url)){
+            delete req.query.key;  // delete query parameter to avoid interference with later validation
+          }
         }
         else {
           resolve(null);

src/helpers/csv.ts

@@ -0,0 +1,7 @@
+import {parseAsync} from 'json2csv';
+
+export default function csv(input: object, fields: string[], f: (err, data) => void) {
+  parseAsync(input)
+    .then(csv => f(null, csv))
+    .catch(err => f(err, null));
+}