Is there a way to check over a column range for a certain data? - if-statement

Question

I have 2 workbooks,
Spreadsheet A has multiple sheets of the same form.
Spreadsheet B records contain cells from Spreadsheet A sheets into a single row per sheet (log).
The first column in Spreadsheet B contains hyperlinks of all sheets in Spreadsheet A. I need to check the hyperlinks column in Spread B as follows:
if hyperlink exist in column A,
check for the next sheet in Spreadsheet A index++
else
record the new data in a row after the last row,,,,
my code used to have clear() function to start submission from scratch to Spreadsheet B, but it's not efficient, execution time wise.
I am trying to manipulate my current code to check manually on existing records and i++/submit new row based on this logic.
you can ignore all missing lines of code because i have it working, i just need the logic of the idea of doing this, since I am not advanced in Apps Script. Thanks in advance for your help.
Spreadsheet A - Sheet1
Spreadsheet A - Sheet2
Spreadsheet B
I want the if statement to run on the Sheet link column in Workbook B.... in case of adding Sheet #3 to Workbook A (picture 1&2), upon submission, I want to check on Sheet links in Workbook B log (because it's unique) if it exists, i++.... if doesn't exist, add 3rd record in log.
for(var index = 2; index < WBA.length; index++)
{
var Sheet = "https://docs.google.com/spreadsheets/d/WBA ID/edit#gid=";
var SID = WBA[index].getSheetId();
var SheetID = Sheet + SID;
var Data = WBB.getDataRange().getValues();
for(var i = 0; i < Data.length; i++)
{
if(Data[i][1] == SheetID)
i++
else
{
var lastRow = WBB.getLastRow() + 1;
var Sheets_ID = new Array()
Sheets_ID.push( [WBA[index].getSheetId()] )
WBB.getRange(lastRow,1).setFormula('=hyperlink("https://docs.google.com/spreadsheets/d/WBA ID/edit#gid=' + Sheets_ID +'")');
var PN_Source = WBA[index].getRange(6,3,1,1).getValues(); //getRange(row number, column number, number of rows, number of columns)
var SC_Source = WBA[index].getRange(8,3,1,1).getValues();

Answer 1

Try this:
function checkForLink() {
var ssB=SpreadsheetApp.getActive();
var sh1=ssB.getActiveSheet();
var rg1=sh1.getRange(1,1,1,4);
var vA1=rg1.getValues()[0];
var hObj={};
vA1.forEach(function(el,i){if(el){hObj[el]=i;}});
var linkA=sh1.getRange(2,hObj['Sheet Link']+1,sh1.getLastRow(),1).getValues().map(function(r){return r[0];});
var ssA=SpreadsheetApp.openById('SSA ID');
var shts=ssA.getSheets();
shts.forEach(function(sh,i){
var vA=sh.getRange(1,1,2,sh.getLastColumn()).getValues();
var sObj={};
vA[0].forEach(function(e,i){sObj[e]=i;});
var shlink=Utilities.formatString('https://docs.google.com/spreadsheets/d/%s//edit#gid=%s',ssA.getId(),sh.getSheetId());
if(linkA.indexOf(shlink)==-1) {
sh1.appendRow([vA[1][sObj.date],vA[1][sObj.age],vA[1][sObj.name],shlink]);
}
});
}