Google Sheets Addon or Formula that accomplishes the same thing as the Prevsheet Macro's for Excel - vba

Question

I want to have a cumulative total running on each sheet (so the current total will be a value on the current sheet summed with the cumulative total from the previous sheet, each sheet representing a day of the month. In Excel this was definable in a Macro similar to this.
Function PrevSheet(rg As Range)
n = Application.Caller.Parent.Index
If n = 1 Then
PrevSheet = CVErr(xlErrRef)
ElseIf TypeName(Sheets(n - 1)) = "Chart" Then
PrevSheet = CVErr(xlErrNA)
Else
PrevSheet = Sheets(n - 1).Range(rg.Address).Value
End If
End Function
Is there anyway to do this in Google Sheets. It keeps referring back to sheet 1. Thanks
I left an editable link here which is a copy of what I am working on.
https://docs.google.com/spreadsheets/d/1cx9w9vOJXKj2WqYBoJOuZ7dWqP1VunFYpZbMLjdpkKQ/edit?usp=sharing

Answer 1

You can do that only using a script. Try this:
function PrevSheet(range) {
var ss = SpreadsheetApp.getActiveSpreadsheet();
var sheets = ss.getSheets();
var active = ss.getActiveSheet().getName();
for (i in sheets) {
if (sheets[i].getName() === active) {
return (sheets[i-1].getRange(range).getValues());
}
}
}
The only problem is, you will have to push the range as a String by surrounding it with quotation marks.
This will give you a range of Data
=PrevSheet("D2:D6")
This will give you the sum
=Sum(PrevSheet("D2:D6"))
UPDATE:
If you want this to be updated, use this script
function PrevSheetName() {
var ss = SpreadsheetApp.getActiveSpreadsheet();
var sheets = ss.getSheets();
var active = ss.getActiveSheet().getName();
for (i in sheets) {
if (sheets[i].getName() === active) {
return (sheets[i-1].getName());
}
}
}
And get the values like this:
=INDIRECT(PrevSheetName()&"!D2")
And
=SUM(INDIRECT(PrevSheetName()&"!D2:D6"))
Hope this helps.