Randomize rows when google doc is opened - google-apps-script

Question

I am trying to create a petition with a google form and doc. I've found an app script that will take the responses from the form and input them into a table on the doc. To help reduce the bias early respondents may face, I am trying to develop a script that will randomize the rows of the table every time the document is opened. Trying to scramble the signatures so that the same signatures aren't always at the top (can't be targeted).
Can anyone help me with this?
Below is the code I am using to populate the table from the form
//Since there could be a bunch of people submitting, we lock the script with each execution
//with a 30 second timeout so nothing gets overwritten
const lock = LockService.getScriptLock();
lock.waitLock(30000);
//Here we read the variables from the form submission event
const date = new Date(e.values[0]).toLocaleDateString();
//of you can use toLocaleString method if you want the time in the doc
const name = e.values[1];
const employeeNumber = e.values[2];
var form = FormApp.openById('');
const num = form.getResponses().length;
var num1 = num.toString()
//Next format those values as an array that corresponds to the table row layout
//in your Google Doc
const tableCells = [num1,name,employeeNumber]
//Next we open the letter and get its body
const letter = DocumentApp.openById('')
const body = letter.getBody();
//Next we get the first table in the doc and append an empty table row
const table = body.getTables()[0]
const tableRow = table.appendTableRow()
//Here we loop through our table cells from above and add
// a table cell to the table row for each piece of data
tableCells.forEach(function(cell, index){
let appendedCell = tableRow.appendTableCell(cell)
})
//here we save and close our letter and then release a lock
letter.saveAndClose();
lock.releaseLock();
}
Got this from a helpful vimeo tutorial by Abhishek Narula and Rebekah Modrak.

Answer 1

Randomize row in a google document table
First function Creates a table in a google document from a table in a spreadsheet
function creatTable() {
const style1 = {};
style1[DocumentApp.Attribute.HORIZONTAL_ALIGNMENT]=DocumentApp.HorizontalAlignment.RIGHT;
const ss = SpreadsheetApp.openById("ssid");
const sh = ss.getSheetByName('Sheet0');
const tA = sh.getDataRange().getValues();
const doc = DocumentApp.getActiveDocument();
let body = doc.getBody();
body.clear();
let n = body.getNumChildren();
for(let i =0;i<n-1;i++) {
if(i==0) {
body.getChild(i).asText().setText('');
} else {
body.getChild(i).removeFromParent()
}
}
let table=body.appendTable(tA).setAttributes(style1);
}
Second function reads the table from the document and randomizes the rows it and reloads the table. This function actually searches through all of the children to find a table. If there is more than one table it will randomize all of them so it will need to be modified to integrate with your specific document.
This now removes the first line and then randomizes the array and then adds the first line back
function readandrandomizetable() {
const style1 = {};
style1[DocumentApp.Attribute.HORIZONTAL_ALIGNMENT] = DocumentApp.HorizontalAlignment.RIGHT;
const doc = DocumentApp.getActiveDocument();
let body = doc.getBody();
let vs = [];
let fl = '';
[...Array.from(new Array(body.getNumChildren()).keys())].forEach(idx => {
let ch = body.getChild(idx);
if (ch.getType() == DocumentApp.ElementType.TABLE) {
Logger.log(`This is the index I want: ${idx}`);
let tbl = ch.asTable();
[...Array.from(new Array(tbl.getNumRows()).keys())].forEach(ridx => {
let s = tbl.getRow(ridx).getText().split('\n');
//Logger.log(JSON.stringify(s));
vs.push(s);
});
Logger.log(JSON.stringify(vs));
fl = vs.shift();
vs.sort((a, b) => {
vA = Math.floor(Math.random() * 100);
vB = Math.floor(Math.random() * 100);
return vA - vB;
});
vs.unshift(fl);
}
});
Logger.log(JSON.stringify(vs));
body.clear();
let n = body.getNumChildren();
for (let i = 0; i < n - 1; i++) {
if (i == 0) {
body.getChild(i).asText().setText('');
} else {
body.getChild(i).removeFromParent()
}
}
body.appendTable(vs).setAttributes(style1);
}