Copying active spreadsheet to all spreadsheet documents in a folder - google-apps-script

Question

I am attempting to copy an individual spreadsheet to all spreadsheet files within a folder. I could not figure out how to do it, so I am using a previous code I found that lists all of the files, but it ends up listing all of the files in my drive, not just in that folder.
Could I get assistance either in making a script to copy it to all files in a specific folder, or change it so that the below code shows only that of the folder it is in? From what I have seen/changed DriveApp.getFiles() should only be listing those files in the folder?
function List()
{
var app = UiApp.createApplication();
app.setTitle("Copy Sheet in Multiple Spreadsheets");
var form = app.createFormPanel();
var flow = app.createFlowPanel();
var label = app.createLabel("Select Spreadsheet where you want to copy the current sheet:").setId('selectLabel');
flow.add(label);
var allfiles = DriveApp.getFiles();
var verticalPanel = app.createVerticalPanel().setId('verticalPanel');
var i = 0;
while (allfiles.hasNext())
{
var file = allfiles.next();
var temp = app.createCheckBox(file.getName()).setName('cb'+i).setId('cb'+i);
var tempvalue = app.createHidden('cbvalue'+i, file.getId());
verticalPanel.add(temp);
verticalPanel.add(tempvalue);
i++;
}
var scrollPanel = app.createScrollPanel().setId('scrollPanel');
scrollPanel.add(verticalPanel);
scrollPanel.setSize("400", "250")
flow.add(scrollPanel);
var buttonsubmit = app.createSubmitButton("Copy");
flow.add(buttonsubmit);
form.add(flow);
app.add(form);
SpreadsheetApp.getActiveSpreadsheet().show(app);
return app;
}
function doPost(eventInfo) {
var app = UiApp.getActiveApplication();
var allfiles = DriveApp.getFiles();
var tempSsId = "";
var i = 0;
while (allfiles.hasNext())
{
var temp = eventInfo.parameter['cb'+i];
if(temp == 'on')
{
tempSsId = eventInfo.parameter['cbvalue'+i];
var activeSheet = SpreadsheetApp.getActiveSheet().copyTo(SpreadsheetApp.openById(tempSsId));
activeSheet.setName(SpreadsheetApp.getActiveSheet().getSheetName());
}
i++;
}
var label = app.createLabel('statusLabel');
label.setText("Copied Active sheet in all selected Spreadsheets...");
label.setVisible(true);
app.add(label);
return app;
}

Answer 1

DriveApp.getFiles(); will get every file in your Drive.
DriveApp.getFolderById('folder id').getFiles(); If you want to get files in a specific folder (this will get the files in that folder but not in subfolders).
This script has nothing to do with the question you asked and I think you may have worded your question incorrectly.
Do you mean you are attempting to copy an individual sheet from a spreadsheet to all of the other spreadsheets in a particular folder?
EDIT
function copyTo() {
var ss = SpreadsheetApp.getActiveSpreadsheet();
var sheetName = ''; // ENTER THE NAME OF THE SHEET YOU WANT TO COPY
var targetFolder = DriveApp.getFolderById(''); //ENTER THE ID OF THE TARGET FOLDER HERE
var sheet = ss.getSheetByName(sheetName);
var getFiles = targetFolder.getFiles();
while (getFiles.hasNext()) {
var file = getFiles.next();
if (file.getMimeType() == 'application/vnd.google-apps.spreadsheet') {
var targetSheet = SpreadsheetApp.openById(file.getId());
sheet.copyTo(targetSheet).setName(sheetName);
}
}
}