Calculations for time elapsed in days - google-apps-script

Question

I have a spreadsheet with multiple sheets each sheet has the same layout with Date in column "A" and Time Elapsed in column "P" I need to calculate days between column A and today on all four sheets. If checkbox in column "N" is set to true then instead calculate column "O" from "A".
So far I have been able to code this bit but, need help getting over the hurdle.
function getDateDifference(event) {
var ss = event.source;
var s = ss.getSheetByName('Alpha'); // I need this to run on all four pages
var r = event.source.getActiveRange();
var startDate = sheet.getRange(3,1).getValue();
var endDate = new Date();
var duration = (endDate - startDate)
var r = event.source.getActiveRange();
if (r.getColumn() == 14 && r.getValue() == true) {
var endDate = sheet.getRange(3, 15);
var duration = (endDate - startDate);
sheet.getRange(3, 16).setValue(duration);
}
else {sheet.getRange(3, 16).setValue(duration);}
}
Example sheet for reference
https://docs.google.com/spreadsheets/d/1OKFoS17le-Y5SAOecoLE4EJxiKqKVjRLRHtMzwHNwxM/edit?usp=sharing

Answer 1

Calculate Diff in Days for selected sheets
function calcdiffindays() {
const ss = SpreadsheetApp.getActive();
const incl = ['Alpha', 'Sheet2', 'Sheet3'];//Add the desired sheet names
const dt = new Date();
const dtv = new Date(dt.getFullYear(), dt.getMonth(), dt.getDate());
ss.getSheets().filter(sh => ~incl.indexOf(sh.getName())).forEach(s => {
s.getRange(3, 1, s.getLastRow() - 2, s.getLastColumn()).getValues().forEach((r, i) => {
if (r[13] == true) {
let d = new Date(r[0]);
let dv = new Date(d.getFullYear(), d.getMonth(), d.getDate());
s.getRange(i + 3, 15).setValue(DiffInDays(dtv, dv));
}
})
})
}
function DiffInDays(Day1,Day2) {
if(Day1 && Day2 && (Object.prototype.toString.call(Day1) === '[object Date]') && (Object.prototype.toString.call(Day2) === '[object Date]')) {
var day=86400000;
var t1=new Date(Day1).valueOf();
var t2=new Date(Day2).valueOf();
var d=Math.abs(t2-t1);
var days=Math.floor(d/day);
//Logger.log(days);
return days;
} else {
throw 'Invalid Inputs';
}
}
Test Sheet:
COL1
COL2
COL3
COL4
COL5
COL6
COL7
COL8
COL9
COL10
COL11
COL12
COL13
COL14
COL15
7/1/2022
2
3
4
5
6
7
8
9
10
11
12
13
TRUE
3
7/2/2022
3
4
5
6
7
8
9
10
11
12
13
14
TRUE
4
7/3/2022
4
5
6
7
8
9
10
11
12
13
14
15
TRUE
5
7/4/2022
5
6
7
8
9
10
11
12
13
14
15
16
TRUE
6
7/5/2022
6
7
8
9
10
11
12
13
14
15
16
17
TRUE
7
7/6/2022
7
8
9
10
11
12
13
14
15
16
17
18
TRUE
8
7/7/2022
8
9
10
11
12
13
14
15
16
17
18
19
TRUE
9
7/8/2022
9
10
11
12
13
14
15
16
17
18
19
20
TRUE
10
7/9/2022
10
11
12
13
14
15
16
17
18
19
20
21
TRUE
11
7/10/2022
11
12
13
14
15
16
17
18
19
20
21
22
TRUE
12
7/11/2022
12
13
14
15
16
17
18
19
20
21
22
23
TRUE
13
7/12/2022
13
14
15
16
17
18
19
20
21
22
23
24
TRUE
14
7/13/2022
14
15
16
17
18
19
20
21
22
23
24
25
TRUE
15
7/14/2022
15
16
17
18
19
20
21
22
23
24
25
26
TRUE
16
7/15/2022
16
17
18
19
20
21
22
23
24
25
26
27
FALSE
7/16/2022
17
18
19
20
21
22
23
24
25
26
27
28
TRUE
18
7/17/2022
18
19
20
21
22
23
24
25
26
27
28
29
FALSE
7/18/2022
19
20
21
22
23
24
25
26
27
28
29
30
TRUE
20
7/19/2022
20
21
22
23
24
25
26
27
28
29
30
31
FALSE
7/20/2022
21
22
23
24
25
26
27
28
29
30
31
32
TRUE
22
You appeared to be attempting to use a trigger. However, you did not specify a trigger and there were no triggers defined in your spreadsheet. So I went without triggers.
An onEdit Version:
function onEdit(e) {
const sh = e.range.getSheet();
const incl = ['Alpha', 'Sheet2', 'Sheet3'];//Add the desired sheet names
const idx = incl.indexOf(sh.getName())
if (~idx && e.range.columnStart == 14 && e.range.rowStart > 2 && e.value == "TRUE") {
const dt = new Date();
const dtv = new Date(dt.getFullYear(), dt.getMonth(), dt.getDate());
let d = new Date(sh.getRange(e.range.rowStart, 1).getValue());
let dv = new Date(d.getFullYear(), d.getMonth(), d.getDate());
e.range.offset(0, 1).setValue(DiffInDays(dtv, dv));
}
}

Answer 2

To insert timestamps in column O when the checkboxes in column N are ticked, use a timestamping script such as yetAnotherTimestamp_ with these parameters:
// [START modifiable parameters]
{
sheetName: /^(Alpha|Beta|Charlie|Delta)$/i,
watchColumn: ['N'],
stampColumn: ['O'],
watchRowStart: 3,
watchRowEnd: +Infinity,
timestampFormat: 'yyyy-MM-dd',
overwriteTimestamp: true,
eraseTimestampOnDelete: true,
},
// [END modifiable parameters]
Then put this formula in cell P2:
=arrayformula(
{
"Days Elapsed";
if( N3:N = "Yes", O3:O - A3:A, iferror(1/0) )
}
)
The formula will give the number of days between the timestamp and the form submission in the rows where a checkbox is ticked.