// This script allows you to observe changes of a reddit comment (only first level commnents to the post, not comment's replies).

// It checks commnet content every 15 seconds. If change was detected you will be notified by 3 short beeps.

// Replace link in first code line with the comment link you want to track changes of

​

var reddit_comment_link = 'https://www.reddit.com/r/Paladins/comments/7nss3e/hirez_expo_2018_live_thread/dsblsve/';

var json_api_link = reddit_comment_link.split('/').slice(0,7).join('/') + '.json?';

var comment_permalink = '/' + reddit_comment_link.split('/').slice(3).join('/');

var comment_body = '';

var audio = new Audio('http://gaschamber.hestfamily.com/tfc/sound/sc5x/mayday2.wav');

audio.volume = 0.5;

var last_update_time = null;

​

// if page doesn't have jQuery loaded we need to add it and wait until script will be loaded to call a callback function

function includejQuery(callback) {

    if(window.jQuery){

        callback();

    } else {

        var script = document.createElement('script');

        script.onload = function() {

            jQuery.noConflict();

            callback();

        };

        script.src = "https://code.jquery.com/jquery-3.2.1.min.js";

        document.getElementsByTagName('head')[0].appendChild(script);

    }

}

​

// returns time difference in between two timestamps in format '1h 2m 3s'

function get_time_difference (previous_time_stamp, current_timestamp){

    result = '';    

    var diff_all_sec = Math.floor((current_timestamp - previous_time_stamp)/1000);  

    var diff_hours = Math.floor(diff_all_sec/60/60);

    var diff_min = Math.floor((diff_all_sec - diff_hours*60*60)/60);

    var diff_sec = Math.floor(diff_all_sec - diff_hours*60*60 - diff_min*60);   

    if ( diff_hours > 0){

        result += diff_hours +'h ';

        result += diff_min +'m ';

        result += diff_sec +'s ';

    } else if ( diff_min > 0) {

        result += diff_min +'m ';

        result += diff_sec +'s ';

    } else if ( diff_sec > 0){

        result += diff_sec +'s ';

    }   

    return result;

}

​

function main(){    

    console.log('Receiving comment data...');

    ( function execute(){        

        jQuery.getJSON(json_api_link, function (data){

          jQuery.each(data[1].data.children, function (i, item) {

            if ( item.data.permalink == comment_permalink ) {

                var current_time = Date.now();

                if ( comment_body === '' ) {  //on first run there no msg yet

                    last_update_time = Date.now();

                    comment_body = item.data.body;

                    //console.log ('Got initial comment');

                    console.log(comment_body);

                } else {

                    if ( comment_body == item.data.body ) { // message was not changed              

                        console.log('post was not changed for '+ get_time_difference(last_update_time, current_time)); // + new Date().toUTCString());

                    } else { // message changed

                        last_update_time = current_time;

                        audio.play(); 

                        setTimeout(function(){audio.play();}, 1500)

                        setTimeout(function(){audio.play();}, 3000)

                        console.log ('UPDATE!!');

                        comment_body = item.data.body;

                        console.log(comment_body);              

                    }

                }       

            }

          });

        });

        setTimeout(execute, 15*1000);

    })();

}

​

includejQuery(main);

​

//dmitriy.zhura@gmail.com

​