Created the initial setup for GSTR-1 export as CSV

accounting/gst.js

@@ -330,7 +330,59 @@ async function generateB2bCsvGstr2(rows, columns) {
   ]
 
   return {
-    columns: csvColumns,
-    rows: rows,
+    columns: csvColumns || [],
+    rows: rows || [],
+  }
+}
+
+export async function generateGstr1Csv(getReportData) {
+  const { gstin } = frappe.AccountingSettings;
+  if (!gstin) {
+    showMessageDialog({
+      message: _('Export Failed'),
+      description: _('Please set GSTIN in General Settings.'),
+    });
+    return;
+  }
+
+  const {
+    rows,
+    columns,
+    filters: { transferType, toDate },
+  } = getReportData();
+
+  const { filePath, canceled } = await getSavePath('gstr-1', 'csv');
+  if (canceled || !filePath) return;
+
+  let gstData;
+  if (transferType === 'B2B') {
+    gstData = await generateB2bCsvGstr1(rows, columns);
+  } else if (transferType === 'B2CL') {
+    gstData = await generateB2clCsvGstr1(rows);
+  } else if (transferType === 'B2CS') {
+    gstData = await generateB2csCsvGstr1(rows);
+  }
+
+  await exportCsv(gstData.rows, gstData.columns, filePath);
+}
+
+async function generateB2bCsvGstr1(rows, columns) {
+  return {
+    columns: columns || [],
+    rows: rows || [],
+  }
+}
+
+async function generateB2csCsvGstr1(rows, columns) {
+  return {
+    columns: columns || [],
+    rows: rows || [],
+  }
+}
+
+async function generateB2clCsvGstr1(rows, columns) {
+  return {
+    columns: columns || [],
+    rows: rows || [],
   }
 }

reports/GoodsAndServiceTax/GSTR1View.js

@@ -1,6 +1,6 @@
 const title = 'GSTR 1';
 import baseConfig from './BaseViewConfig';
-import { generateGstr1Json } from '../../accounting/gst';
+import { generateGstr1Json, generateGstr1Csv } from '../../accounting/gst';
 
 const transferTypeMap = {
   B2B: 'B2B',
@@ -29,6 +29,14 @@ const actions = [
       generateGstr1Json(report, filters);
     },
   },
+  {
+    group: 'Export',
+    label: 'CSV',
+    type: 'primary',
+    action: async (report, filters) => {
+      generateGstr1Csv(report, filters);
+    },
+  },
 ]
 
 export default {