🚀 go-pugleaf

var myDoc = app.activeDocument;
var myFile = myDoc.fullName;
var myJobNumber;

if (app.extractLabel("KasJobNumber") != "") {
      myJobNumber = parseInt(app.extractLabel("KasJobNumber"));
}
else {
   myJobNumber = 54321;
}

var myDialog = app.dialogs.add({name:"Rename current file", canCancel:true});
with(myDialog){
   with(dialogColumns.add()){
      with(borderPanels.add()){
         with(dialogColumns.add()){
            staticTexts.add({staticLabel:"Enter job number:"});
         }
         with(dialogColumns.add()){
            var myPointSizeField = realEditboxes.add({editValue:myJobNumber});
         }
      }
   }
}
if(myDialog.show() == true){
   myJobNumber = myPointSizeField.editValue;
   app.insertLabel("KasJobNumber", myJobNumber.toString());
}

var myPageRange = myDoc.pages.firstItem().name + "-" + myDoc.pages.lastItem().name;
myFile.rename(myJobNumber + "-" + myPageRange + ".indd");