How to Put Formula Count another sheet in App Script - google-apps-script

Question

my First ASK and last at 2020.
Im Newbie with google App Script, need some help
I had 2 Spreadsheet
Spreadsheet ssGETDATA with SHEET1 column(id,name,address,ts,visit)
Spreadsheet ssVERIFY with SHEET1 column (id,ts)
I send data from Android use this code :
function doGet(e) {
return message("Error: Please Try Again");
}
function doPost(e) {
var id= e.parameters.id[0];
var name= e.parameters.name[0];
var address= e.parameters.address[0];
var visit= e.parameters.visit[0];
var ts = Utilities.formatDate(new Date(), "GMT+8", "dd/MM/yyyy HH:mm:ss");
var ss = SpreadsheetApp.getActive();
var sh = ss.getSheets()[0];
sh.appendRow([id,name,address,ts,visit]);
return message("Data Saved");
} else {
return message("Error: Please Try Again");
}}}
function message(msg) {
return ContentService.createTextOutput(msg);
}
I want to Verify data from ssGETDATA but data (id) appeared several times.
so my idea every time append row executed it put formula in column (visit) with =count(id,ssVERIFYSheet1!id) to check it Verified or Not
how it applies in the google app script?
i hope when ssVERIFY changed then ssGETDATA column (visit) counting too.
thanks for your explanation. Happy new Year

Answer 1

The simplest way to check if a column has a value probably is using getValues(), and search for the row in the array:
const range = sheet.getRange('A2:A')
const hasBeenValidated = range.getValues()
.flat()
.some(value => value === id)
if (hasBeenValidated) {
// [...]
}
Notice that I assumed that id is on column A and that it has a header.
flat() is necessary because getValues() returns a 2D array (array of rows) and we only need an array of values.
With this snippet you can check for existing entries at ssGETDATA and/or ssVERIFY before making any changes. It should work for any column but you may need to change the value === id part depending on the type of it (dates, for example).
References
Range getValues() (Google Developers)
Array.prototype.flat() (MDN)
Array.prototype.some() (MDN)
SpreadsheetApp openByUrl(url) (Google Developers)