Userscripts.org

// ==UserScript==
// @name           Metacritic - Good Old Games (gog.com)
// @description    Add Metacritic ratings to Good Old Games
// @author         Sean Flanigan [totally based on Metacritic - Google Movies by Brice McIver]
// @include	http://*.gog.com/*
// @include	http://gog.com/*
// ==/UserScript==

/* To do list:
1. Cache results to reduce load on metacritic servers.
2. Show better indicator that movie was not found on metacritic.
3. Show indicator when all results have been fetched and displayed.
4. Fetch data from gamerankings.com as well/instead
5. Tweak the lookup string to get more hits
*/

(function () {

    var MCGoogleMovies =
    {
        mc_req: function (movietitle)
        {
            if (! movietitle) {
                return;
            }

            var shortmovietitle = movietitle.text;
            // Remove "The" if it is the first word in movie title
            if (shortmovietitle.search(/the/i) === 0) {
                shortmovietitle = shortmovietitle.substring(4);
            }
            
            // Remove most non alphanumeric characters from title
//            shortmovietitle = shortmovietitle.replace(/[^A-Za-z0-9 (\-,@,\')]+/g,'');
            
            // Returns first result from search for game by title.
            var src = 'http://www.metacritic.com/search/process?ty=3&tfs=game_title&sb=0&ts=' +
                      encodeURIComponent(shortmovietitle);
            if (typeof(GM_xmlhttpRequest) === 'function') {
                GM_xmlhttpRequest({
                    method: 'GET',
                    url: src,
                    headers: {
                        'User-agent': 'Mozilla/5.0 (compatible) Greasemonkey'
                    },
                    onload: function (response) {
                        var theRating = response.responseText.match(/ <span class="(green|yellow|red|noscore)">[x 0-9]{1,3}<\/span>/i);
                        if (theRating !== null)
                        {
                            var newElement = document.createElement("span");
                            newElement.innerHTML = theRating[0];
                            movietitle.parentNode.insertBefore(newElement, movietitle.nextSibling);
                        }
                    }
                });
            }
        },

        mc_discover: function ()
        {
            var movieLinks  = document.evaluate("//div[@class='g_c_title']/a[contains(@href,'/gamecard/')]",
                                                document,
                                                null,
                                                XPathResult.UNORDERED_NODE_ITERATOR_TYPE,
                                                null);
            try {
                var linkText = movieLinks.iterateNext();

                while (linkText) {
                    MCGoogleMovies.mc_req(linkText);
                    linkText = movieLinks.iterateNext();
                }
            }
            catch (e) {
                dump('Error: Document tree modified during iteration ' + e);
            }
        },

        addGlobalStyle: function (css)
        {
            var head = document.getElementsByTagName('head')[0];
            if (!head) {
                return;
            }
            var style = document.createElement('style');
            style.type = 'text/css';
            style.innerHTML = css;
            head.appendChild(style);
        }
    };

    // Styles from http://www.metacritic.com/general.css on 7/10/2008
    MCGoogleMovies.addGlobalStyle('.green { font-weight: bold; color: #000000; background-color: #33CC00; padding-right: 3px; padding-left: 3px; letter-spacing: 0px; } ');
    MCGoogleMovies.addGlobalStyle('.yellow { font-weight: bold; color: #000000; background-color: #FFFF00; padding-right: 3px; padding-left: 3px; letter-spacing: 0px; } ');
    MCGoogleMovies.addGlobalStyle('.red { font-weight: bold; color: #FFFFFF; background-color: #FF0000; padding-right: 3px; padding-left: 3px; letter-spacing: 0px; } ');
    MCGoogleMovies.addGlobalStyle('.noscore { font-weight: bold; color: #000000; background-color: #808E9B; padding-right: 3px; padding-left: 3px; letter-spacing: 0px; } ');
    MCGoogleMovies.mc_discover();

})();