const { spawn } = require('child_process');

const Runner = require('./Runner');

class JavaScriptRunner extends Runner {

defaultFile() {

return this.defaultfile;

}

constructor() {

super();

this.defaultfile = 'Hello.js';

}

run(file, directory, filename, extension, callback) {

if (extension.toLowerCase() !== '.js') {

console.log(`${file} is not a javascript file.`);

}

this.execute(file, directory, callback);

}

execute(file, directory, callback) {

// set working directory for child_process

const options = { cwd: directory };

const argsRun = [];

argsRun[0] = file;

console.log(`options: ${options}`);

console.log(`argsRun: ${argsRun}`);

const executor = spawn('node', argsRun, options);

executor.stdout.on('data', (output) => {

console.log(String(output));

callback('0', String(output)); // 0, no error

});

executor.stderr.on('data', (output) => {

console.log(`stderr: ${String(output)}`);

callback('2', String(output)); // 2, execution failure

});

executor.on('close', (output) => {

this.log(`stdout: ${output}`);

});

}

log(message) {

console.log(message);

}

}

module.exports = JavaScriptRunner;