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HTML 

              
                <html>
  <head>
    <link href='https://fonts.googleapis.com/css?family=Press+Start+2P' rel='stylesheet' type='text/css'/>
    <script src="https://code.jquery.com/jquery-1.10.1.min.js"></script>
    <script src="https://code.jquery.com/jquery-migrate-1.2.1.min.js"></script>
    <script src="https://underscorejs.org/underscore-min.js"></script>
</head>
<body>
  <div class="menu">
    <a class="link_player_one player_one" href="#">player 1</a>
    <a class="link_player_two player_two" href="#">player 2</a>
    <a class="link_reset" href="#">reset</a>
  </div>
  <h1 class="battle_alert">Live battle!</h1>
  <hr />
<h2 id="vs"></h2>
  <hr />
  <h3 class="featureing_title"><span>Featureing:</span><p class='featureing'></p></h3>
  <p class='programming'></p>
  
<table cellpadding=5 >
  <thead>
    <tr>
      <th>Skill</th>
      <th class="player_one">Player one</th>
      <th class="player_two">Player two</th>
      <th>Winner</th>
    </tr>
  </thead>
  <tbody>    
  </tbody>
  <tfoot>
    <tr>
      <th colspan=4 class="" style="text-align:right;">Outcome: <span class="overall_winner"></span></th>
    </tr>
  </tfoot>
</table>
<p id="game_details">
  This page shows progress made by each user since the last page reset. <span id="page_load"></span>   
</p>
</body> 
</html>
!

CSS 

              
                body {
  color:green;
  font-family: 'Press Start 2P', cursive;
  background-color:black;
}
#vs, .featureing_title, .outcome{
  text-align:center;
  width:100%;  
}

hr {
  color: green;
  background-color: green;
  height: 5px;
  border:0px;
  width:800px;
}

.battle_alert {
  text-align:center;
  width:100%;  
}
.featureing, .featureing_title {
  text-align:center;
  color:#c412c4;
}

.featureing {
  width:50%;  
}

table, .featureing {
  margin-left:auto;
  margin-right:auto; 
  
}

.player_one {
  color:yellow;
}
.player_two {
  color:red;
}

#game_details {
  font-size:10px;
    text-align:center;
  line-height:200%;
  width:40%;
  margin-left:auto;
  margin-right:auto;
  color:#7E7B7B;
}

.menu {
  text-align:right;
}
!

JS 

              
                $(document).ready(function(){
  
  function chkEmpty(item) {
    console.dir(item);
    if(item == null || item == false || item == undefined){
      console.log('empty');
      
      return true;
    }
    console.log('full');
    return false;
  }
  
  function getJsonStore(key) {
    var item = localStorage.getItem(key); 
    if(!chkEmpty(item)) {  
      //console.dir(item);
      item = JSON.parse(item);
    } 
    return item;
  }
  
    var player_one_username = localStorage.getItem('p1_name'),
    player_two_username = localStorage.getItem('p2_name'),
    player_one, 
    player_two, 
    player_one_init       = getJsonStore('player_one_init'), //these are set once at page load to see progess
    player_one_init_langs = getJsonStore('player_one_init_langs'),
    player_two_init       = getJsonStore('player_two_init'),
    player_two_init_langs = getJsonStore('player_two_init_langs'),
    page_loaded = localStorage.getItem('since');
    
    if(chkEmpty(player_one_username)) {
      player_one_username = "paul";
      localStorage.setItem('p1_name', player_one_username);
    }

    if(chkEmpty(player_two_username)) {
      player_two_username = "michaeljcalkins";
      localStorage.setItem('p2_name', player_two_username);
    }
  
    if(chkEmpty(page_loaded)) {
      page_loaded = new Date();
    }
    
  function reset() {
    page_loaded = new Date();
    
    localStorage.clear();
    localStorage.setItem('since', page_loaded);
    
    player_one_init = false; //these are set once at page load to see progess
    player_one_init_langs = false;
    player_two_init = false;
    player_two_init_langs = false;
    loadUserData();
  }
  
  $('.menu').on('click', '.link_player_one', function(e) {
    e.preventDefault();
    player_one_username = window.prompt('Enter a Codeivate username (see http://www.codeivate.com/users/leaderboard)', player_one_username);
    localStorage.setItem('p1_name', player_one_username);
    reset();
  });
  
  $('.menu').on('click', '.link_player_two', function(e) {
    e.preventDefault();
    player_two_username = window.prompt('Enter a Codeivate username (see http://www.codeivate.com/users/leaderboard)', player_two_username);
    localStorage.setItem('p2_name', player_two_username);
    reset();
  });
  
 $('.menu').on('click', '.link_reset', function(e) {
    e.preventDefault();    
    reset();
  });

  
 function getLanguageDiff(current, init) {
  var pdiff = {};
    _.each(current, function(value, key, list) {
      if( init[key] == undefined ) {
        pdiff[key] = value;
      } else {
         pdiff[key] = value - init[key]; 
      }
      if( pdiff[key] == 0) {
        delete  pdiff[key]; 
      }
    });
    return pdiff;
  }
  
  function battle() {
    var row, winner, item, items,i, win_count = 0, languages_used, p1_diff, p2_diff;

    p1_diff = getLanguageDiff(player_one.used_langs, player_one_init_langs);
    p2_diff = getLanguageDiff(player_two.used_langs, player_two_init_langs);
    
    
    var all_langs_used = _.keys(p1_diff).concat(_.keys(p2_diff));
    languages_used = _.uniq(all_langs_used);
    
      
    

    $('#page_load').html(page_loaded); 

    $('#vs').html("");
    $('#vs').append( $('<span>').html(player_one.name).addClass('player_one'));
    $('#vs').append(" vs ");
    $('#vs').append( $('<span>').html(player_two.name).addClass('player_two'));
       
    $('tbody').empty();

    
    if(_.size(languages_used) == 0) {
       languages_used.push("waiting for coders.."); 
      $(".featureing_title span").hide();
    } else {
      $(".featureing_title span").show(); 
    }
    console.dir(languages_used);
    $('.featureing').html(languages_used.join());
 
    
    
    items = {
      'languages_used' : {type:'calculated', name:'languages used'},
          'language_points':{name:'language points', type:'int'},    
          'level':{name:'level', type:'int'},
          'focus_level':{name:'focus level', type:'int'},
          'focus_points':{name:'focus points', type:'int'},
          //'languages':{name:'languages', type:'int'},
          'total_days_coded':{name:'total days coded', type:'int'},
          'total_flow_states':{name:'total flow states', type:'int'},
          'time_spent':{name:'time spent', type:'time'},
          'programming_now':{name:'programming now', type:'bool'},
          'streaking_now':{name:'streaking now', type:'bool'},
          'current_language':{name:"current language", type:'string'}
    };


    
    for(item in items) {
      var col1 = "", col2 = "";
      winner_class = "";
      row =  $('<tr>'); 
      row.append($('<th>').html(items[item].name));
      
      if(items[item].type === 'calculated') {
        
        col1 = _.size(p1_diff); 
        col2 = _.size(p2_diff);
        
        if( col1 > col2) {
          winner = 'player one'; 
          winner_class = "player_one";
          win_count --;          
        } else if(col1 < col2) {
          winner = 'player two';
          winner_class = "player_two";
          win_count ++;          
        } else if (col1 == 0 && col2 == 0) {
          winner = '-';
          winner_class = "";
        } else {
          winner_class = "";
          winner = 'draw';
        }
        
         
      }  else if (items[item].type === 'int') {

        //console.log("PRE:P1 - "+ player_one[item] + ": P2 - " + player_two[item], item);

        player_one[item] = parseFloat(player_one[item]) - parseFloat(player_one_init[item]);
        player_two[item] = parseFloat(player_two[item]) - parseFloat(player_two_init[item]);
        
        //console.log("POST:P1 - "+ player_one[item] + ": P2 - " + player_two[item], item);

        if( player_one[item] > player_two[item]) {
          winner = 'player one';
          winner_class = "player_one";
          win_count --;
          
        } else if(player_two[item] > player_one[item]) {
          winner = 'player two';
          winner_class = "player_two";
          win_count ++;          
        } else if (player_one[item] == 0 && player_two[item] == 0) {
          winner = '-';
          winner_class = "";
        } else {
          winner_class = "";
          winner = 'draw';
        }
      
        col1 = Math.floor(player_one[item]) + " (" + Math.floor((player_one[item] - Math.floor(player_one[item])) * 100) + "%)" ;
        col2 = Math.floor(player_two[item]) + " (" + Math.floor((player_two[item] - Math.floor(player_two[item])) * 100) + "%)" ;

      } else if (items[item].type === 'time') {

        winner = "&nbsp;";
        
        col1 = Math.floor(player_one[item]/60/60) + "h " + Math.floor(player_one[item]/60%60) + "m";
        col2 = Math.floor(player_two[item]/60/60) + "h "+ Math.floor(player_two[item]/60%60) + "m";

      } else {
        winner = "&nbsp;"; // td's can't be empty
        col1 = player_one[item];
        col2 = player_two[item];
      }

      row.append($('<td>').addClass('player_one').html(col1));
      row.append($('<td>').addClass('player_two').html(col2));
      row.append($('<td>').removeClass().addClass(winner_class).html(winner));
      $('tbody').append((row) );
    }
  
    if(win_count > 0) {
      overall_winner = "player two FTW!";
      win_class = "player_two";
    } else if(win_count < 0) {
      overall_winner = "player one FTW!";
      win_class = "player_one";
    } else {
      win_class= "";
      overall_winner = "draw!";
    }
    $('.overall_winner').html(overall_winner).removeClass('player_one').removeClass('player_two').addClass(win_class);

  }
 
  function loadUserData() {
      console.log('loading user data..');
      $.getJSON('http://codeivate.com/users/'+player_one_username+'.json?callback=?',
        function data(player_one_data) {
          
           player_one_data['language_points'] = _.reduce(player_one_data.languages, function(memo, details, language){return memo + details.points; }, 0);    
            player_one_data['used_langs'] = {};
             _.each(player_one_data.languages, function(value, key, list) {
                player_one_data['used_langs'][key] = value.points;    
              });
      

             player_one = player_one_data;

          if(chkEmpty(player_one_init)) {   
                      
            player_one_init_langs = _.clone(player_one_data['used_langs']);
            player_one_init = _.clone(player_one_data); //this is only a shallow copy..

            localStorage.setItem('player_one_init', JSON.stringify(player_one_init));
            localStorage.setItem('player_one_init_langs', JSON.stringify(player_one_init_langs));
          }

          $.getJSON('http://codeivate.com/users/'+player_two_username+'.json?callback=?',
            function data(player_two_data) {
              player_two_data['language_points'] = _.reduce(player_two_data.languages, function(memo, details, language){ return memo + details.points;}, 0);    
              
              player_two_data['used_langs'] = {};
              _.each(player_two_data.languages, function(value, key, list) {
                player_two_data['used_langs'][key] = value.points;    
              }); 
                            
              player_two = player_two_data;
             
              if(chkEmpty(player_two_init)) { 
                player_two_init_langs = _.clone(player_two_data['used_langs']);
                player_two_init = _.clone(player_two_data); //this is only a shallow clone..
       

                localStorage.setItem('player_two_init', JSON.stringify(player_two_init));
                localStorage.setItem('player_two_init_langs', JSON.stringify(player_two_init_langs));
              }              
              battle();
            }
          );
      });
  }
  
  loadUserData();
  setInterval( loadUserData, 30000);

});
!
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