Is it possible to get the destination sheet from app script - google-apps-script

Question

I am trying to identify the destination sheet for a google form. I can get the spreadsheet using:
function getDataSheet(){
var form = FormApp.getActiveForm();
var id = form.getDestinationId();
var ss = SpreadsheetApp.openById(id);
var sheet = ""; // how do I get the sheet that the data will go to?
}
The problem is how can I get the sheet that the form results will go to? I can guess that it is [0], but that is not a guarantee.

Answer 1

var form = FormApp.getActiveForm();
var formId = form.getId();
var sheets = ss.getSheets();
for(i=0; i<sheets.length; i++){
var sheetFormURL = sheets[i].getFormUrl();
if(sheetFormURL) {
if(sheetFormURL.indexOf(formId)!=-1) {
var sheet = sheets[i];
break;
}
}
}
if(typeof sheet !== 'undefined'){
//do what you need to do in the sheet
}

Answer 2

Currently, there is no "built-in" way to get the sheet tab of the Form destination.
If the user of the spreadsheet has not changed the default sheet name given, then you can loop through all the sheets, get the sheet name, and check for a name that includes the text: "Form Responses".
The first default name given is:
Form Responses 1
Then, if more destinations are added, the number at the end is increased.
If the user changes the name, then obviously, you can not use that strategy. If you can get the sheet tab name as soon as the new destination is created, then store the sheet tab ID in the documents properties, that would ensure that you have the information available. Having the sheet tab ID is better than having the sheet tab destination name, that way, if the destination sheet tab name gets changed, you can still find the correct sheet tab by looking the ID up from the document properties, then using the ID to get the sheet tab.
If the spreadsheet has multiple Form Responses X sheets, and you wanted to get the last destination added, you would need to get the number off the end, and find out what the highest number is.
There should be a way to get the destination sheet tab. I don't know if there is a feature request for that or not.

Answer 3

This is what I am doing as a workaround. It will try and find the datasheet, and should work for most forms. It is not very efficient, but should hopefully work to get most forms.
function getDestinationSheet(ss){
if(!ss){
var form = FormApp.getActiveForm();
var id = form.getDestinationId();
ss = SpreadsheetApp.openById(id);
}
var possibleDS = [];
var allSheetNames =[];
var dsName = {};
var locale = ss.getSpreadsheetLocale();
var text = "Timestamp";
if(locale != "en_US"){
text = LanguageApp.translate(text, "en_US", locale);
}
var sheets = ss.getSheets();
for(i in sheets){
var s = sheets[i];
var sName = s.getName();
allSheetNames.push(sName);
var a1 = s.getRange("A1").getValue();
if (a1 == text){ possibleDS.push(sName) }
}
var l = possibleDS.length;
switch (l){
case 0:
dsName.name = "Error";
dsName.error = "No matches found";
dsName.sheets = allSheetNames;
break;
case 1:
dsName.name = possibleDS[0];
dsName.error = "Sucess";
break;
default:
dsName.name = "Error";
dsName.error = "Unable to determine destination sheet using timestamp";
dsName.sheets = possibleDS;
break;
}
return dsName;
}