From 3e92c644fd7e5c78d0d3b6410fe09589c1cf637d Mon Sep 17 00:00:00 2001
From: Sam Hadow <sam.hadow@inbox.lv>
Date: Fri, 23 Feb 2024 00:37:15 +0100
Subject: [PATCH] JS functions: convert object to csv, convert csv to object

---
 web/csv.js | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 web/csv.js

diff --git a/web/csv.js b/web/csv.js
new file mode 100644
index 0000000..232f573
--- /dev/null
+++ b/web/csv.js
@@ -0,0 +1,39 @@
+// CSV to JS object
+function csvToObject(csvData) {
+  const rows = csvData.split('\n');
+  const headers = rows[0].split(',');
+  const dataArray = [];
+
+  for (let i = 1; i < rows.length; i++) {
+    const values = rows[i].trim().split(','); // trim to remove linebreak
+    if (rows[i] != '') {
+        //don't treat empty lines
+        const obj = {};
+        for (let j = 0; j < headers.length; j++) {
+            obj[headers[j]] = values[j];
+        }
+        dataArray.push(obj);
+    }
+  }
+  return dataArray;
+}
+
+
+// JS object to CSV
+function objectToCsv(objArray) {
+  const array = typeof objArray !== 'object' ? JSON.parse(objArray) : objArray;
+  let csv = '';
+  // field names in first line
+  const fields = Object.keys(array[0]);
+  csv += fields.join(',') + '\r\n'; // \r\n for cross platform compatibility
+  // data rows
+  for (let i = 0; i < array.length; i++) {
+    let line = '';
+    for (let index in array[i]) {
+      if (line !== '') line += ',';
+      line += array[i][index];
+    }
+    csv += line + '\r\n';
+  }
+  return csv;
+}