'use strict';

// Example showing us how the framework creates an environment (sandbox) for

// appication runtime, load an application code and passes a sandbox into app

// as a global context and receives exported application interface

const PARSING_TIMEOUT = 1000;

const EXECUTION_TIMEOUT = 5000;

// The framework can require core libraries

const fs = require('fs');

const vm = require('vm');

const sfs = require('sandboxed-fs');

// Create a hash and turn it into the sandboxed context which will be

// the global context of an application

const context = {

module: {},

console,

require: (name) => {

if (name === 'fs') return sfs.bind('./');

let exported = execute('./node_modules/' + name + '/index.js');

if (!exported) exported = require(name);

}

};

context.global = context;

const sandbox = vm.createContext(context);

function execute(fileName) {

console.log(fileName);

fs.readFile(fileName, (err, src) => {

console.log(src);

let script;

try {

script = new vm.Script(src, { timeout: PARSING_TIMEOUT });

console.dir({ script });

} catch (e) {

console.dir(e);

process.exit(1);

}

try {

script.runInNewContext(sandbox, { timeout: EXECUTION_TIMEOUT });

const exported = sandbox.module.exports;

console.dir({ exported });

return exported;

} catch (e) {

console.dir(e);

process.exit(1);

}

});

}

execute('./application.js');