Google scripts - issue with string vs cell as function parameter - google-apps-script

Question

I'm learning Google script as I go along and came across an issue that I could not find a solution for.
I have a function that takes in several several strings and one cell as params.
I assume passing a cell is not same as passing its value (string too btw)
Please find attached code:
//return id assigned to data(cell) sheetname
function findInColumn(column, data, colName, sheetname) {
/*
data = cell (cell value is 'bag_backpack.png') does not work
var range = SpreadsheetApp.getActiveRange();
var col = range.getColumn();
var row = range.getRow();
var range2 = SpreadsheetApp.getActiveSheet().getRange(row,col+1);
data = range2.getValue(); (cell value is 'bag_backpack.png') <---fail too
data = 'bag_backpack.png'; <---works
*/
var sheet = SpreadsheetApp.getActive().getSheetByName(sheetname);
var column = sheet.getRange(column + ":" + column); // like A:A
var values = [];
for (var index = 0; index < column.getValues().length; index++) {
values.push(column.getValues()[index][0])
}
var colIndex = getByName(colName, sheetname);
var rowIndex = values.indexOf(data);
//grab id value of data
var range = sheet.getRange(rowIndex+1,colIndex+1);
var data = range.getValue();
return data
}
While I value and need your feedback I kindly request your bear in mind I'm a novice at best and I've spend several hours searching before asking here.
Thank you for your help.
Edit: bag_backpack.png is the content of a cell I'm searching in a column to get the row number of said cell.
var rowIndex = values.indexOf(data);
Returns the index I need.
However... if I feed a cell to the function instead of a string like a cell elsewhere with bag_backpack.png as its content or even derive said value from it:
var range = SpreadsheetApp.getActiveRange();
var col = range.getColumn();
var row = range.getRow();
var range2 = SpreadsheetApp.getActiveSheet().getRange(row,col+1);
data = range2.getValue(); (cell value is 'bag_backpack.png') <---fail too
In said case:
var rowIndex = values.indexOf(data);
gives out -1 instead of index desired.

Answer 1

Most of what you have doesn't make sense to me. I'm guessing that this is what you want. Since I can't figure out what you want, perhaps you can tell me what I missed.
function findInColumn(column,sheetname) {
var sh=SpreadsheetApp.getActive().getSheetByName(sheetname);
var rg=sh.getRange(column + ":" + column); /
var vA=rg.getValues();
var values = [];
for (var i=0;i<vA.length; i++) {
values.push(vA[i][0]);
}
return values
}

Answer 2

I want to thank everyone for taking the time to reply.
the issue was NOT with the code but with some of the first filename having uppercase in the id,name sheet while the binder sheet it did not.(at least 5 hours on Tent.png/tent.png)
I'm attaching a link to my finished work in hopes it benefits anyone.
https://docs.google.com/spreadsheets/d/1jCy1I4r6PeY3kUWrhNno2XO18Jghq6_b1kyN3AflidM/edit?usp=sharing