Copying or updating the row based on the occurrence of a row cell value - google-apps-script

Question

I'm trying to add a given row or update an existing row to a Google Sheet based on a specific value in the row data. My row data is represented as an array object, like this: [id, number, date, type, url, count].
What I expect is that, if there exists a row with a matching number, I increment the count by 1 in the same range in the Google Sheet, else I add a new row with my row data.
Here's what I've tried so far, but it works only for count=2 and not beyond that.
function copyRowBasedOnNumber(sheetId, sheetName, rowData) {
var sheet = SpreadsheetApp.openById(sheetId);
var sheetname = sheet.getSheetByName(sheetName);
var count = 0;
var matchingRow = sheetname.getLastRow();
var values = sheetname.getDataRange().getValues();
for (var row in values) {
for (var col in values[row]) {
if (values[row][col] == rowData[1]) { // rowData[1] corresponds to the number
matchingRow = row;
count++;
break;
}
}
}
if(count == 0) {
var lastRowNum = sheetname.getLastRow();
sheet.insertRowAfter(lastRowNum);
rowData[5] = 1;
sheetname.getRange(lastRowNum + 1, 1, 1, rowData.length).setValues([rowData]);
} else {
sheetname.getRange(parseInt(matchingRow) + 1, 6).setValue(count + 1);
}
return count + 1;
}

Answer 1

I've figured it out. In case this helps someone in future, here's the code. Here, count is the value I want to check before I add a new entry or update an existing entry.
function copyRowToSheetWithoutDuplicate(sheetId, tabName, rowData) {
var sheet = SpreadsheetApp.openById(sheetId);
var sheetname = sheet.getSheetByName(tabName);
var count = 0;
var existingCount = 0;
var existingEntryRow = 0;
var allValues = sheetname.getDataRange().getValues();
var numColumns = sheetname.getLastColumn();
var numRows = sheetname.getLastRow();
for(var i=0;i<numRows;i++) {
var dateFromRowData = rowData[3].substring(0,10);
var todayDate = Utilities.formatDate(new Date(), "GMT+05:30", "''yyyy-MM-dd");
if(allValues[i][1]==rowData[1] && dateFromRowData!=todayDate) {
count++;
existingCount = allValues[i][6];
existingEntryRow = i + 1;
break;
}
}
if(count == 0) {
// insert a row and make an entry
sheetname.insertRowAfter(numRows);
rowData.push(1); // count
sheetname.getRange(numRows + 1, 1, 1, rowData.length).setValues([rowData]);
return 1;
} else {
// update the existing count by incrementing it by 1
existingCount++;
rowData.push(existingCount); // count
sheetname.getRange(existingEntryRow, 1, 1, rowData.length).setValues([rowData]);
return existingCount;
}
}