Google Script protect entire row when edited cell is changed to a certain value

Question

I've been trying to make a script to protect a row when one of the drop down values from the row is set to a certain value ('ON HOLD'). The closest I've been to finding a solution was ( Protect row when drop down menu changes to “Locked” using app scripts ) unfortunately that solution isn't descriptive so I don't know where to begin changing it. This is what I have so far on my solution

function onEdit(event){
var eventsheet = event.source.getActiveSheet();
var editedcell = eventsheet.getActiveCell();

var step = event.range;
var step2 = step.getRow();

Logger.log(step2);

var protectcol = 5;

if(editedcell.getColumn() == protectcol){
  if(editedcell.getDisplayValue() == 'ON HOLD'){
    var protectionrg = step2.protect();
    protectionrg.addEditor('Email@mail.com'); //Entire Row Protect
  }
 } 
}

What should I do?

Answer 1

Here is a sample code:

function onEdit(event){
var eventsheet = event.source.getActiveSheet();
var editedcell = event.range;

var rowRange = eventsheet.getRange("A"+editedcell.getRow()+":"+editedcell.getRow());

Logger.log(rowRange.getA1Notation());

var protectcol = 5;

  if(editedcell.getColumn() == protectcol){
    if(editedcell.getDisplayValue() == 'ON HOLD'){
      var protectionrg = rowRange.protect();
      protectionrg.addEditor('Email@mail.com'); //Entire Row Protect
      protectionrg.removeEditors(protectionrg.getEditors());
      Logger.log("PROTECTED");
    }
    else{
      //Remove protection
      var protections = eventsheet.getProtections(SpreadsheetApp.ProtectionType.RANGE);
      protections.forEach(protection => {
        var protectedRange = protection.getRange();
        if(protectedRange.getRow() == editedcell.getRow()){
          //Remove protection
          protection.remove();
        }
      });
    }
  } 
}

Pre-requisite:

Use Installable On-Edit Trigger

Modifications done:

• getRow() returns an integer. If you want to use protect() , you need to get either sheet or range object. In your case, you want to protect the entire row. Hence you need to get the range of the entire row. I used Sheet.getRange(a1Notation) to get the range of the entire row, where a1Notation is in this format A1:1 (to select row1)
• When the cell in columnE is set to ON HOLD , protect the entire row by adding your preferred editor and by removing existing editors using removeEditors(emailAddresses)

Note:

removeEditors() does not allow the current user to be removed. If the sheet was modified by another user (not Email@mail.com) and set it to ON HOLD . Your simple onEdit trigger won't be able to remove this another user as an editor in your protected range. As a workaround, you need to use onEdit installable trigger, to run the code created by the owner.

Reference: Unable to remove the effective user from editing rights of protected range using script - google sheets

• Lastly, When the cell in columnE is set any value other than ON HOLD , get all protected range in the current sheet using getProtections(type) , with protection type set to RANGE . Then loop all existing protection. Check if the protected range's row index is the same with the modified cell's row index. Remove protection using remove()