excel sheet reader

packages/api/src/shell/excelSheetReader.js

@@ -0,0 +1,28 @@
+const exceljs = require('exceljs');
+const stream = require('stream');
+const _ = require('lodash');
+
+async function excelSheetReader({ fileName, sheetName }) {
+  console.log(`Loading excel ${fileName}`);
+  const workbook = new exceljs.Workbook();
+  await workbook.xlsx.readFile(fileName);
+  const sheet = workbook.getWorksheet(sheetName);
+
+  const pass = new stream.PassThrough({
+    objectMode: true,
+  });
+  const header = sheet.getRow(1);
+  const structure = {
+    columns: _.range(header.cellCount).map((index) => ({ columnName: header.getCell(index + 1).value })),
+  };
+  pass.write(structure);
+  for (let rowIndex = 2; rowIndex <= sheet.rowCount; rowIndex++) {
+    const row = sheet.getRow(rowIndex);
+    pass.write(_.fromPairs(structure.columns.map((col, index) => [col.columnName, row.getCell(index + 1).value])));
+  }
+  pass.end();
+
+  return pass;
+}
+
+module.exports = excelSheetReader;

packages/api/src/shell/index.js

@@ -6,6 +6,7 @@ const tableWriter = require('./tableWriter');
 const copyStream = require('./copyStream');
 const fakeObjectReader = require('./fakeObjectReader');
 const consoleObjectWriter = require('./consoleObjectWriter');
+const excelSheetReader = require('./excelSheetReader');
 
 module.exports = {
   queryReader,
@@ -14,6 +15,7 @@ module.exports = {
   runScript,
   tableWriter,
   copyStream,
+  excelSheetReader,
   fakeObjectReader,
   consoleObjectWriter,
 };