JS sri bot

    "sri": {

        usage: "<subreddit>",

        process: function(bot, msg, subreddit) {

            var MAX_PAGE_ATTEMPTS = 2;

            var ITEMS_PER_PAGE = 50;

            var path = "";

            var after = "";

            var attemptNumber = 1;





            if(subreddit) {

                path = "/r/" + subreddit + "/.json?limit="+ITEMS_PER_PAGE+"&after=";

            } else {

                bot.sendMessage(msg.channel, "Must provide a subreddit.");

            }



            var callback = function(result) {

                if(result.body && result.body.data && result.body.data.children.length !== 0) {

                    var data = result.body.data.children;

                    var time = new Date();

                    if(typeof sri_sentLinks === "undefined"){

                        sri_sentLinks = [];

                    }

                    sri_sentLinks = sri_sentLinks.filter(function(sent){

                        return sent.timestamp > time.getTime() - (12*60*60*1000);

                    });

                    var filteredData = data.filter(function(child){

                        return child && child.data && child.data.url &&

                        (child.data.url.indexOf("imgur") !== -1 ||

                        child.data.url.indexOf("gfycat") !== -1 ||

                        child.data.url.indexOf("gif") !== -1  ||

                        child.data.url.indexOf("jpg") !== -1  ||

                        child.data.url.indexOf("jpeg") !== -1  ||

                        child.data.url.indexOf("redditmedia") !== -1 ||

                        child.data.url.indexOf("png") !== -1 );

                    });

                    filteredData.sort(function(a, b){

                        return a.data.url.localeCompare(b.data.url);

                    });

                    var unsentLinks = [];

                    var senti = 0, datai = 0;

                    while(datai < filteredData.length){

                        if(senti >= sri_sentLinks.length){

                            unsentLinks.push(filteredData[datai++]);

                            continue;

                        }

                        var comparison = filteredData[datai].data.url.localeCompare(sri_sentLinks[senti].url);

                        if(comparison < 0){

                            unsentLinks.push(filteredData[datai++]);

                        }else if(comparison > 0){

                            senti++;

                        }else{

                            datai++;

                            senti++;

                        }

                    }

                    var c = unsentLinks.length;

                    if(c === 0){

                        if(attemptNumber++ !== MAX_PAGE_ATTEMPTS){

                            after = data[data.length - 1].data.name;

                            doSearch();

                        }else{

                            bot.sendMessage(msg.channel, "No image found on " + subreddit + ".");

                        }

                        return;

                    }

                    var rand = Math.floor(Math.random() * (c));

                    var url = unsentLinks[rand].data.url;

                    senti = 0;

                    while(senti < sri_sentLinks.length && sri_sentLinks[senti] && sri_sentLinks[senti].url && sri_sentLinks[senti].url.localeCompare(url) < 0){

                        senti++;

                    }

                    sri_sentLinks.splice(senti, 0, {"url": url, "timestamp": time.getTime()});

                    bot.sendMessage(msg.channel, unsentLinks[rand].data.title + ": " + url);



                    var pattern = /((imgur.com\/a)|(imgur.com\/album)|(imgur.com\/gallery))/;

                    var pattern2 = /(imgur.com)/;

                    var pattern3 = /\.(jpg|png|gif|bmp)$/;

                    if (pattern.test(url))

                    {

                        var match = url.split('/')[4];

                        unirest.get("https://api.imgur.com/3/album/" + match + "/images")

                        .header("Authorization", "Client-ID 378ca74b217e4cc")

                        .header("Accept", "application/json")

                        .end(function (result)

                        {

                        var lengthh = result.body.data.length;

                        if (lengthh > 10)

                            lengthh = 10;

                        bot.sendMessage(msg.channel, lengthh + " images in this album are:");

                        for(var i=0; i<lengthh; i++)

                            {

                            bot.sendMessage(msg.channel, result.body.data[i].link);

                            }

                        });

                    return;

                    }

                    if ((pattern2.test(url) && !(pattern.test(url))) &&  !(pattern3.test(url)))

                    {

                    bot.sendMessage(msg.channel, url + ".jpg");

                    return;

                    }



                } else {

                    bot.sendMessage(msg.channel, "No image found on " + subreddit + ".");

                }

            };



            var doSearch = function(){

                unirest.get("https://www.reddit.com" + path + after)

                .header("Accept", "application/json")

                .end(callback);

            };



            doSearch();

        }

    },