feat: get accounts as csv

routes.ts

@@ -29,15 +29,25 @@ router.get('/budget/:month', async (req, res) => {
   res.status(200).json(budget);
 });
 
-router.get('/accounts', async (_, res) => {
-  const accounts = await actual.getAccounts();
-  res.status(200).json(accounts);
-});
+router.get(
+  '/accounts',
+  async (_, res, next) => {
+    const accounts = await actual.getAccounts();
+    res.locals.data = accounts;
+    next();
+  },
+  formatHandler,
+);
 
-router.get('/accounts/:accountid', async (req, res) => {
-  const account = await actual.getAccount(req.params.accountid);
-  res.status(200).json(account);
-});
+router.get(
+  '/accounts/:accountid',
+  async (req, res, next) => {
+    const account = await actual.getAccount(req.params.accountid);
+    res.locals.data = account;
+    next();
+  },
+  formatHandler,
+);
 
 router.get(
   '/accounts/:accountid/transactions',
@@ -65,13 +75,24 @@ export { router };
 
 function jsonToCSV(data: any) {
   let csv = '';
-  csv += Object.keys(data?.[0]).join(',') + '\n';
 
-  for (const row of data) {
-    csv += Object.values(row)
+  const unpackHeaders = (x: object) => Object.keys(x).join(',') + '\n';
+  const unpackValues = (x: object) =>
+    Object.values(x)
       .map((v) => JSON.stringify(v))
-      .join(',');
-    csv += '\n';
+      .join(',') + '\n';
+
+  // object
+  if (!Array.isArray(data)) {
+    csv += unpackHeaders(data);
+    csv += unpackValues(data);
+    return csv;
+  }
+
+  // array
+  csv += unpackHeaders(data?.[0]);
+  for (const row of data) {
+    csv += unpackValues(row);
   }
 
   return csv;