Create Backup of a Document And Log Doc Properties

Creates a backup of a document and logs the doc properties to a log text file:

// find the backup folder - create if not already exists
var backupFolder = space.childByNamePath('Backup');
if (backupFolder == null && space.hasPermission('CreateChildren'))
{
   // create the folder for the first time
   backupFolder = space.createFolder('Backup');
}
if (backupFolder != null && backupFolder.hasPermission('CreateChildren'))
{
   // copy the doc into the backup folder
   var copy = document.copy(backupFolder);
   if (copy != null)
   {
      // change the name so we know it's a backup
      var backupName = 'Backup of ' + copy.name;
      copy.name = backupName;
      copy.save();
   }

   // record the time of the backup to a log file
   var logFile = backupFolder.childByNamePath('backuplog.txt');
   if (logFile == null)
   {
      logFile = backupFolder.createFile('backuplog.txt');
   }
   if (logFile != null)
   {
      logFile.content += 'File: ' + backupName +
                         '\tDate: ' + new Date().toUTCString() +
                         '\tSize: ' + copy.size + '\r\n';
   }
}