Copy value to another sheet with a condition - google-apps-script

Question

I feel like today I'm not able to do anything with my script.
I'm trying to do a simple test, if the date in cell1 is equal to the date in cell2 then I will copy and paste the data into another file, in a specific sheet. If cell1 is different than cell2, I will copy the data in the same other file but in a different sheet.
I can't make it work. What am I doing wrong? thanks for the help,
j.
function copytransactionTodispatchN() {
var sss = SpreadsheetApp.getActiveSpreadsheet();; // sss = source spreadsheet
var ss = sss.getSheetByName("Nouveau Client - Transaction du jour"); // ss = source sheet
var ssn = sss.getSheetByName("Nouveau Client"); // ss = source sheet
//Get full range of data
var SRange = ss.getRange('A2:f2');
var SData = SRange.getValues();
var dateachat = ssn.getRange('c20').getValues;
var datelivraison = ssn.getRange('e31').getValues;
if(dateachat == datelivraison){
var tss = SpreadsheetApp.openById("idoftheotherfile"); // tss = target spreadsheet
var ts = tss.getSheetByName("sheet1"); // ts = target sheet
ts.getRange("b"+(getLastDataRow(ts)+1)+":i"+(getLastDataRow(ts)+1)).setValues(SData);
}
else {var tss = SpreadsheetApp.openById("idoftheotherfile"); // tss = target spreadsheet
var ts1 = tss.getSheetByName("Sheet2"); // ts = target sheet
//set the target range to the values of the source data
ts1.getRange("a"+(getLastDataRow(ts)+1)+":h"+(getLastDataRow(ts)+1)).setValues(SData);
}
}
function getLastDataRowN(sheet) {
var lastRow = sheet.getLastRow();
var range = sheet.getRange("b" + lastRow);
if (range.getValue() !== "") {
return lastRow;
} else {
return range.getNextDataCell(SpreadsheetApp.Direction.UP).getRow();
}
}

Answer 1

Ok, the mistakes were :
getlastrow function was not working for condition 2
the test of the date was not woking, I had to replace if(dateachat == datelivraison.) by if(dateachat.valueOf() == datelivraison.valueOf())
And now it is all good. Thank you all!!
var sss = SpreadsheetApp.getActiveSpreadsheet();; // sss = source spreadsheet
var ss = sss.getSheetByName("Nouveau Client - Transaction du jour"); // ss = source sheet
var ssn = sss.getSheetByName("Nouveau Client"); // ss = source sheet
//Get full range of data
var SRange = ss.getRange('A2:h2');
var SData = SRange.getValues();
var dateachat = ssn.getRange('c20').getValues;
var datelivraison = ssn.getRange('e31').getValues;
if(dateachat.valueOf() == datelivraison.valueOf()){
var tss = SpreadsheetApp.openById("IDtarget"); // tss = target spreadsheet
var ts = tss.getSheetByName("Sheet1"); // ts = target sheet
ts.getRange("b"+(getLastDataRowb(ts)+1)+":i"+(getLastDataRowb(ts)+1)).setValues(SData);
}
else {var tss = SpreadsheetApp.openById("IDtarget"); // tss = target spreadsheet
var ts = tss.getSheetByName("Sheet 2"); // ts = target sheet
//set the target range to the values of the source data
ts.getRange("a"+(getLastDataRowa(ts)+1)+":h"+(getLastDataRowa(ts)+1)).setValues(SData);
}
}
function getLastDataRowb(sheet) {
var lastRow = sheet.getLastRow();
var range = sheet.getRange("b" + lastRow);
if (range.getValue() !== "") {
return lastRow;
} else {
return range.getNextDataCell(SpreadsheetApp.Direction.UP).getRow();
}
}
function getLastDataRowa(sheet) {
var lastRow = sheet.getLastRow();
var range = sheet.getRange("a" + lastRow);
if (range.getValue() !== "") {
return lastRow;
} else {
return range.getNextDataCell(SpreadsheetApp.Direction.UP).getRow();
}
}```

Answer 2

var dateachat = ssn.getRange('c20').getValues;
Variable ssn isn't defined anywhere, which is likely causing dateachat to be undefined or null.