How to lock cell using google script?

Question

I have a Google Spreadsheet that share to my staffs to record every single order details. This is only example:

https://docs.google.com/spreadsheets/d/1r8_6S_jI-ZzL1GgZEur4ZVM51xqu3fWfnbFOHw3ZTZw/edit?usp=sharing

Every time the order is closed, I wish to protect whole order row to avoid mistaken edits. In the example file I have a script code that I copied from some other posts(I couldn't find it anymore) but the demand between me and the original poster is kinda different so I edited the range but I still can't make it perfect.

Here's what I need:

1. If G2 = 1, A2:F2 protect to only owner can edit. When G2 is anything else,clear the protected range A2:F2. I need it to do the same thing in every single row until 2000. (G3 = 1 then protect A3:F3) (G4 = 1 then protect A4:F4) Something like this until 2000 row.

2. I want the same code applying to all 4 tab (Sheet1 to Sheet4)

3. I found that with my current script, if G2 = 1, everytime I edit something it will add a new range to the same range (A2:F2).I remember the original post is onOpen but I have to make it onEdit to make sure everything is protected well.

Answer 1

Maybe this can help you. A few considerations first:

First of all, creating a Range is not a quick process, it requires from 0,5 to 1 second, so doing this for 2000 rows in 4 sheets (that's 8000 rows) it would take 1 or 2 hours, and that's way beyond the execution time limit even if you were an Enterprise G Suite user.

The main problem with ranges is that they are stored in SpreadsheetApp.ProtectionType.RANGE , this creates an array of Ranges, so in order to delete an specific range when G is not 1, you have to compare the Row you edited with all the values of the Range array.

This script executes each time you edit a row, if it's protected (G = 1) it does nothing, if it's not and you change G = 1, then it protects the range A:F of that row. If you change the 1 in G, it deletes the protection. So this doesn't protect or unprotect each row of the 4 sheets, it only protects or unprotects the row you edit in any of the sheets.

 function onEdit() {
  var sprsheet = SpreadsheetApp.getActiveSpreadsheet();
  var sheet = sprsheet.getActiveSheet();
  var protections = sheet.getProtections(SpreadsheetApp.ProtectionType.RANGE);
  var col_G = sheet.getRange("G2:G2000").getValues();
  var edited_row = sheet.getActiveRange().getRow();
  var protected = false;
  var range_pos;
  modifyProtection(edited_row, protections, col_G, sheet, protected);

}

function modifyProtection(edited_row, protections, col_G, sheet, protected, range_pos){
  if (protections.length == 0 && col_G[edited_row - 2] == 1){ //In case there aren't ranges yet
    createRange(edited_row, sheet);

  } else {
      for (var i = 0; i < protections.length; i++){

          if (edited_row == protections[i].getRange().getRow()){
            range_pos = i;
            protected = true;

          }
  }
    if (protected && col_G[edited_row - 2] != 1){
          protected = false;
          deleteRange(range_pos, protections);        


    } else {
          if (!protected && col_G[edited_row - 2] == 1){
              protected = true;
              createRange(edited_row, sheet);
      }
    }
  }
}

function createRange(edited_row, sheet, protected){

   var range = sheet.getRange('A'+(edited_row)+':F'+(edited_row));
   var protection = range.protect().setDescription('Sample protected range');
   var me = 'your_email';//This will be the only editor of the protected ranges   
   protection.addEditor(me);  
   protection.removeEditors(protection.getEditors());

   if (protection.canDomainEdit()) {
       protection.setDomainEdit(false);
   }
}

function deleteRange(i, protections){
    protections[i].remove();
}