Google Apps Script - List de the public file of the DocsList in Google Apps Script

gistfile1.js

// #GoogleAppsScript #Gscript #GoogleSpreadsheet

function getPublicFiles(){
  var ss = SpreadsheetApp.getActiveSpreadsheet();
  var docs = DocsList.getFiles(); //Retrieve all the docs.
  var listfile = "";
  var viewer = new Array;
  var owner = "";
  var me = Session.getUser().getEmail(); //Get the email of the script owner. Need it to check if you are the owner of the file.
  for(var i in docs){
    try{
      viewer = docs[i].getViewers(); //We have to put this call in a try because sometimes it may return an error.
    }catch(e){
      viewer = "NA";
    }
    try{
      owner = docs[i].getOwner().getEmail();//We have to put this call in a try because sometimes it may return an error.
    }catch(e){
      owner = "NA";
    }
    if(viewer != "NA" && owner == me ){ //If there is wiewer and if you are  the owner of the file.
      j = 0;
      for(j in viewer){
        if(viewer[j].getEmail() == "Public"){//Check if the user Public exist in the Viewer.
          listfile = listfile + docs[i].getName()+ ", "; // I built a basic list but it can be change in a table for example.
        }
      }
    }
  }
  Browser.msgBox(listfile); //Just display the list in a message box.
}