How can I check whether if "Allow Scripts to Write Files and Access Network" is enable using Script?

Here's a barebone function that will check if Allow Scripts to Write Files and Access Network is enabled or disabled

function canWriteFiles() {
	var appVersion, commandID, scriptName, tabName;

	appVersion = parseFloat(app.version);

	commandID = 2359;
	tabName = 'General';
	if (appVersion >= 16.1) {
		commandID = 3131;
		tabName = 'Scripting & Expressions';
	}

	if (isSecurityPrefSet()) return true;

	scriptName = (script && script.name) ? script.name : 'Script';
	alert(message = scriptName + ' requires access to write files.\n' +
		'Go to the "' + tabName + '" panel of the application preferences and make sure ' +
		'"Allow Scripts to Write Files and Access Network" is checked.');

	app.executeCommand(commandID);

	return isSecurityPrefSet();

	function isSecurityPrefSet() {
		return app.preferences.getPrefAsLong(
			'Main Pref Section',
			'Pref_SCRIPTING_FILE_NETWORK_SECURITY'
		) === 1;
	}
}