Update or create new row based on Unique ID Google Sheets - google-apps-script

Question

I have found a few options that come close to what I want to do, but nothing matching it exactly.
The request is simple enough.
"Sheet A" - Master Sheet (has 1 header row)
"Sheet B" - Input Sheet (has 1 header row)
"Column C" - Unique ID (same column on both sheets)
Trigger
Sheet B is edited
Actions
Script finds the Unique ID from Sheet B in Column C and looks for it in Sheet A in Column C.
If it finds it, the entire respective row on Sheet A is replaced with the entire respective row from Sheet B.
If it does not find it, a new row is added at the bottom of Sheet A and the entire respective row from Sheet B is added as a new record into the new row at the bottom of Sheet A.
The entire respective row on Sheet B is Deleted.
Actions repeat until there are no populated rows in Sheet B from row 2 on (i.e. excluding the row 1 header).
Thanks
Edits
For clarification on why I am looking to do this. I have a Form that is being submitted and sending the data through to Google Sheets (Cognito -> Zapier -> Google Sheets). Part of this form involves repeating sections (line items). The current method that is importing the responses has no issue with adding new responses correctly, however when a response is updated, it cannot find/update the existing row(s) correctly for the repeating sections. So I had the intention of using Sheet A as my master sheet and then using Sheet B to simply be a receiving sheet. This way I can just submit every entry (including updated ones) as a "new" entry on Sheet B, and then have my script do the updating.
Sheet B will be edited automatically every time a new form entry is submitted or updated. The "edit" is basically a new row being added and data being populated into that row. It may be a good idea to add a 1 minute timer to the trigger so that if there is lots of data being added that it gives time for that to happen.
I am not even remotely close to a script expert. I just browse around different scripts other people have made and try to combine them to get them to work for what I need. I have found scripts that will move a row over and then delete it, but it does not check for matching values to update. I have found other scripts that check for unique values and copy over, but they do not delete the original row on the other sheet. I have tried to combine them, but since I don't have the base knowledge, I can't seem to get it to work.

Answer 1

As a workaround I'd use the onEdit simple trigger and a O(n) search
Here's my approach:
function onEdit(e) {
// If it's not the Sheet B it won't make changes
if (e.range.getSheet().getName() !== "Sheet B") {
return;
}
var range = e.range;
var numberRow = range.getA1Notation().slice(1);
var ss = SpreadsheetApp.getActiveSpreadsheet();
var sheetA = ss.getSheetByName("Sheet A");
var sheetB = ss.getSheetByName("Sheet B");
var currentRowB = sheetB.getRange(`A${numberRow}:D${numberRow}`);
var id = currentRowB.getValues()[0][2];
// There's to be 4 values in the row (no empty values)
if(currentRowB.getValues()[0].filter(value => value !== '').length === 4) {
// Get all the values in Sheet A
var rows = sheetA.getDataRange().getValues();
for (row=1; row < rows.length; row++) {
// If column C matches the ID replace the row
if(rows[row][2] === id) {
var currentRowA = sheetA.getRange(`A${row+1}:D${row+1}`);
currentRowA.setValues(currentRowB.getValues());
currentRowB.deleteCells(SpreadsheetApp.Dimension.COLUMNS);
return;
}
}
// If the ID doesn't match then insert a new row
var newRow = sheetA.getRange(`A${rows.length+1}:D${rows.length+1}`);
newRow.setValues(currentRowB.getValues());
currentRowB.deleteCells(SpreadsheetApp.Dimension.COLUMNS);
}
}
Which meets the requirements you asked:
Script finds the Unique ID from Sheet B in Column C and looks for it in Sheet A in Column C. (line 19-28)
If it finds it, the entire respective row on Sheet A is replaced with the entire respective row from Sheet B. (line 22-24)
If it does not find it, a new row is added at the bottom of Sheet A and the entire respective row from Sheet B is added as a new record into the new row at the bottom of Sheet A. (line 31-33)
The entire respective row on Sheet B is Deleted. (line 22 and 33)
I used this Sheet format as example:
Both Sheets have the same format. Keep in mind that this script checks if there's a valid row (in this specific case 4 columns which compose a row) before replacing it.
As a different approach (handling blank data)
In a summary this script should run every X minutes or the time you want it doesn't matter if there's new data incoming because this code will handle all the data given a certain time.
I edited the code in order to use the Z1 cell as a blocker cell and a time based trigger:
Trigger:
Code
function processCells() {
var ss = SpreadsheetApp.getActiveSpreadsheet();
var sheetA = ss.getSheetByName("Sheet A");
var sheetB = ss.getSheetByName("Sheet B");
// If it's not the Sheet B or if there's a process running it won't make changes
if (sheetB.getName() !== "Sheet B" || sheetB.getRange("Z1") === "Running") {
return;
}
// Use the Z1 cell in order to block or unblock this sheet
sheetB.getRange("Z1").setValue('Running');
// Process all the rows
var numCells = sheetB.getDataRange().getValues().length + 1;
for (numberRow = 2; numberRow <= numCells; numberRow++) {
var currentRowB = sheetB.getRange(`A${numberRow}:D${numberRow}`);
var id = currentRowB.getValues()[0][2];
// Get all the values in Sheet A
var rows = sheetA.getDataRange().getValues();
var match = false;
for (row=1; row < rows.length; row++) {
// If column C matches the ID replace the row
if(rows[row][2] === id) {
var currentRowA = sheetA.getRange(`A${row+1}:D${row+1}`);
currentRowA.setValues(currentRowB.getValues());
currentRowB.deleteCells(SpreadsheetApp.Dimension.COLUMNS);
match = true;
break;
}
}
if(!match) {
// If the ID doesn't match then insert a new row
var newRow = sheetA.getRange(`A${rows.length+1}:D${rows.length+1}`);
newRow.setValues(currentRowB.getValues());
currentRowB.deleteCells(SpreadsheetApp.Dimension.COLUMNS);
}
}
sheetB.getRange("Z1").setValue('');
}
Note that every time the script runs it'll check if there's another one processing the rows by using Z1.
References
onEdit
Event Object