scratch-www/bin/get-localized-urls

#!/usr/bin/env node

/*
Get localized-urls.json from resources.scratch.mit.edu
 */

var https = require('https');
var fs = require('fs');
var path = require('path');
var urlData = '';

var args = process.argv.slice(2);

if (!args.length) {
    process.stdout.write('A output filename must be specified.\n');
    process.exit(1);
}
var filename = path.resolve(__dirname, 'lib', args.shift());

https.get('https://resources.scratch.mit.edu/localized-urls.json', (res) => {
    var statusCode = res && res.statusCode;

    var error;
    if (statusCode !== 200) {
        error = new Error('Request Failed.\n' +
                        `Status Code: ${statusCode}`);
    }
    if (error) {
        process.stdout.write(`${error.message}\n`);
        // consume response data to free up memory
        res.resume();
        return;
    }
    res.setEncoding('utf8');
    res.on('data', (chunk) => { urlData += chunk; });
    res.on('end', () => {
        try {
            var urlJson = JSON.parse(urlData);
            fs.writeFile(filename, JSON.stringify(urlJson, null, '  '));
        } catch (e) {
            process.stdout.write(`Failed parsing url data: ${e.message}\n`);
            process.exit(1);
        }
    });
}).on('error', (e) => {
    process.stdout.write(`Got error: ${e.message}\n`);
    process.exit(1);
});