Google Sheets add a note by appending column based on matching value - google-apps-script

Question

The goal is to add a note or several notes over time to a google sheet based on the value chosen.
The script will allow for a button to be added in the sheet and run the script function to append to the next available column.
For example, the name Tim is chosen. A note is written, the button is pressed to run the function and it will add it to Column D (since it is the next available column for Tim).
Another example, the name Jeff is chosen. A note is written. Since there are no more columns the append column should automatically create a new column and allow for the note to be written in "Jeff's" row, which would be Column G
Not sure if this is at all possible but hope to get some suggestions or ideas.
A
B
C
D
E
F
Mark
B+
completed assignment partly but needed extra time since..
89433
other
Tim
A
checked
Jeff
C
n/a
assignment # 4
done
other
Steve
A
completed
get file
received
Elon
B-
three out of four
check email

Answer 1

Here's what I think you're trying to achieve -
And, this code should help you get started -
function main() {
const name = "Steve";
const note = "HELLO"
addNote(name, note);
}
function addNote(name, note) {
const ss = SpreadsheetApp.getActiveSpreadsheet().getActiveSheet();
const values = ss.getDataRange().getValues();
for (var rowIndex = 0; rowIndex < values.length; rowIndex++) {
let row = values[rowIndex];
let nameColumn = row[0];
if (nameColumn == name) {
let rowValues = ss.getRange(`${rowIndex+1}:${rowIndex+1}`).getValues()[0]
.filter(value => value !== "")
let newColIndex = rowValues.length;
ss.getRange(rowIndex+1, newColIndex+1).setValue(note);
}
}
}
Although, I'd highly recommend choosing something else as a unique identifier as opposed to a name because if there are 2 rows with the same name, then the code would actually add notes against both (incorrectly).