urlshorten-google.js

// Copyright (c) 2016, Matt Godbolt
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
//     * Redistributions of source code must retain the above copyright notice,
//       this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above copyright
//       notice, this list of conditions and the following disclaimer in the
//       documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.

"use strict";
var options = require('options');
var Alert = require('./alert');
var $ = require('jquery');

function googleJSClientLoaded() {
    var gapi = window.gapi;
    gapi.client.setApiKey(options.gapiKey);
    gapi.client.load('urlshortener', 'v1', googleJSClientLoaded.done);
}

function shortenURL(url, done) {
    if (!options.gapiKey) {
        done(null);
        return;
    }
    var gapi = window.gapi;
    if (!gapi || !gapi.client || !gapi.client.urlshortener) {
        // Load the Google APIs client library asynchronously, then the
        // urlshortener API, and finally come back here.
        window.googleJSClientLoaded = googleJSClientLoaded;
        googleJSClientLoaded.done = function () {
            shortenURL(url, done);
        };
        $(document.body).append('<script src="https://apis.google.com/js/client.js?onload=googleJSClientLoaded">');
        return;
    }
    var request = gapi.client.urlshortener.url.insert({resource: {longUrl: url}});
    request.then(function (resp) {
        var id = resp.result.id;
        if (options.googleShortLinkRewrite.length === 2) {
            id = id.replace(new RegExp(options.googleShortLinkRewrite[0]), options.googleShortLinkRewrite[1]);
        }
        done(id);
    }, function (t) {
        // Advanced debugging technique right here...
        if (t && t.result && t.result.error) {
            var report = t.result.error;
            // Custom error message when url is too big
            if (url.length >= 8000) report.message = 'URL length exceeds goo.gl limits';
            new Alert().notify("Url shortener: Error #" + report.code + ": " + report.message, {
                group: "shortlink-error",
                alertClass: "notification-error"
            });
        } else {
            new Alert().notify("Url shortener: Unknown error while trying to query Google ShortLink Services.",
                {
                    group: "shortlink-error",
                    alertClass: "notification-error"
                });
        }

        done(null);
    });
}

module.exports = shortenURL;