Added Excel support

Author: perki

dr-controler.js

@@ -18,7 +18,6 @@ async function stateChange(state) {
     document.getElementById('please-login').style.display = 'none';
     document.getElementById('data-view').style.display = 'block';
     setQuestionnaries();
-
   } else {
     document.getElementById('please-login').style.display = 'block';
     document.getElementById('data-view').style.display = 'none';

exporToXLS.js

@@ -1,24 +1,56 @@
 // add XML export to file
 import "https://unpkg.com/write-excel-file@1.x/bundle/write-excel-file.min.js";
 
+const regexISO = /\d{4}-[01]\d-[0-3]\dT[0-2]\d:[0-5]\d:[0-5]\d\.\d+([+-][0-2]\d:[0-5]\d|Z)/;
+
 export async function exportXLSFile(headers, lines, fileTitle) {
   try {
     console.log({ headers, lines });
 
-    const schema = Object.entries(headers).map((h) => {
-      const key = h[0];
-      return {
-        column: h[1],
-        value: function (e) {
-          return e[key];
-        },
-      };
-    });
+    const headersXLS = Object.values(headers).map((h) => ({
+        value: h,
+        fontWeight: 'bold',
+    }));
+    const columns = headersXLS.map((e) => ({ width: e.value.length + 2 }));
+
+    const dataXLS = [];
+    dataXLS.push(headersXLS);
+    for (const line of lines) {
+      const row = [];
+      dataXLS.push(row);
+      let i = 0;
+      for (const [key, label] of Object.entries(headers)) {
+        const cell = { value: line[key] };
+        let myLength = 10;
+
+        // -- number 
+        const n = Number(cell.value);
+        if (!Number.isNaN(n)) {
+          cell.value = n;
+          cell.type = Number;
+        } else if (typeof cell.value === 'string') { // date
+          myLength = cell.value.length;
+          const fulldate = cell.value.endsWith('Z');
+          const t =  fulldate ? cell.value : cell.value + 'T00:00:00.000Z';
 
+          if (regexISO.test(t)) {
+            cell.value = new Date(t);
+            cell.type = Date;
+            cell.format = fulldate ? 'yyyy-mm-dd hh:mm:ss' : 'yyyy-mm-dd'
+            myLength = fulldate ? 18 : 11;
+          }
 
-    const exportedFilename = fileTitle + ".xlsx" || "export.xlsx";
-    await writeXlsxFile(lines, {
-      schema,
+        }
+        row.push(cell);
+        myLength = Math.min(myLength, 33) + 2;
+        if (columns[i].width < myLength) columns[i].width = myLength;
+        i++;
+      }
+    }
+    console.log('## columns', {columns});
+    const exportedFilename = fileTitle + '.xlsx' || 'export.xlsx';
+    await writeXlsxFile(dataXLS, {
+      columns,
       fileName: exportedFilename,
     });
   } catch (e) {