class for working with zanata

zanata-helper.js

'use strict';
var request = require('request'),
    toFile = require('vinyl-source-stream'),
    toBuffer = require('vinyl-buffer'),
    mergeStream = require('merge2'),
    ZANATA_USER = {
        USERNAME: '<place username here>',
        TOKEN: '<place token here>'
    };

module.exports = {
    downloadPoTranslationFiles : downloadPoTranslationFiles,
    downloadVinylFileFromZanata: downloadVinylFileFromZanata,
    downloadFromZanata: downloadFromZanata
};

function downloadPoTranslationFiles (languageCodes, projectName, version, documentName) {
    var translations = languageCodes.map(function (lang) {
            return {
                path: lang + '.po',
                url: 'http://translations.fronter.net/zanata/rest/file/translation/' +
                projectName +'/' +
                version + '/' +
                lang + '/po?docId=' +
                documentName
            };
        });

    return mergeStream(
        translations.map(function (translation) {
            return downloadVinylFileFromZanata(translation.url, translation.path)
        })
    );
}

function downloadVinylFileFromZanata (fileUrl, filePath) {
    return downloadFromZanata(fileUrl)
        .pipe(toFile(filePath))
        .pipe(toBuffer());
}

function downloadFromZanata (url) {
    return request.get({
        url: url,
        headers: {
            'X-Auth-User': ZANATA_USER.USERNAME,
            'X-Auth-Token': ZANATA_USER.TOKEN
        }
    });
}