Protecting Range through Google Apps Script - google-apps-script

Question

I am trying to protect a range through google apps script in my google sheet. Whenever the data point in column O is checked i.e. value is yes. I would like that row be protected.
Secondly, I have prior protected columns E:H and M:N, which should stay protected.
There are around 1000 rows, 10-15 new rows that need to be protected daily. By the code I have currently written, it removes the protection and then re-adds it, which takes a lot of time. If I remove the part where it removes the rights then it still re-adds the same protection regardless.
Is there anyway to check if the cell is protected, if protected move onto the next row?
Secondly, I'm unable to provide access to the other emails i.e. "add editors"
function removecompleted(){
var ss = SpreadsheetApp.getActiveSpreadsheet()
var purchased = ss.getSheetByName("Purchased Inventory")
last_row_purchased = purchased.getLastRow()
var emails = [
'user#domain.com'
];
var protections = purchased.getProtections(SpreadsheetApp.ProtectionType.RANGE);
for (var i = 0; i < protections.length; i++) {
var protection = protections[i];
if (protection.canEdit()) {
protection.remove();
}
}
for(var i = 1; i < last_row_purchased; i++) {
if(purchased.getRange(i, 15).getValue() == "Yes")
{
target_range = purchased.getRange(i, 1, 1, 15)
protection = target_range.protect().setDescription('Sample protected range');
var me = Session.getEffectiveUser();
protection.addEditor(me);
protection.removeEditors(protection.getEditors())
protection.addEditors(emails);
protection.removeEditors(protection.getEditors());
if (protection.canDomainEdit()) {
protection.setDomainEdit(false);
}
}
}
var range = purchased.getRange('E:H');
var protection = range.protect().setDescription('Always Protected');
var range = purchased.getRange('M:N');
var protection = range.protect().setDescription('Always Protected');
}

Answer 1

You can do this on edit, but rather than checking to see if the cell is protected (which is not that much faster than just setting the protection anyway) you can just check the row of each protected range and remove the protection if its row is equal to the row of the cell that was just unticked:
function onEdit(e) {
// List of sheet names the function should run on
const sheets = ["Sheet1", "Sheet2", "Sheet3", "etc"]
const sheet = e.source.getActiveSheet()
// if current sheet is not in permitted sheets, return
if (!~sheets.indexOf(sheet.getName())) {
return
}
const row = e.range.getRow()
if (e.range.getColumn() === 15) {
const ss = e.source
if (e.value === "TRUE") {
range = sheet.getRange(`${row}:${row}`)
const me = Session.getEffectiveUser().getEmail()
const protection = range.protect()
protection.getEditors().forEach(user => {
protection.removeEditor(user.getEmail())
})
protection.addEditor(me)
}
else {
const protections = sheet.getProtections(SpreadsheetApp.ProtectionType.RANGE)
protections.forEach(function(p) {
if (p.getRange().getRow() === row) {
if (row === 1 && p.getRange().getColumn() !== 1) return
p.remove()
}
})
}
}
}
Code Rundown:
Get the row number of the edited range
Check if the edited cell was column 15
If the value of the cell is "TRUE", protect the row, and remove all editors aside yourself.
If the value of the cell is "FALSE", then get all the sheet's protections, check the value of their row, and if the row matches the edited cell's row, then remove that protection
NB : The final check also has a condition to check if the column is not equal to 1 so to not remove the protections on E:H or M:N.
References:
Class Protection
Class: Sheet
Class: Range