bet-stats.js

(function() {
  'use strict';

  var MAX_CONCURRENT_REQUESTS = 10;


  var incTeam = function(map, team, winnings) {
    if (map[team] == null) {
      map[team] = {
        bets: 1,
        won: 0 + (winnings >= 0),
        winnings: winnings
      };
    } else {
      ++map[team].bets;
      if (winnings >= 0) {
        ++map[team].won;
      }
      map[team].winnings += winnings;
    }
    return map;
  };


  $('#ajaxCont').on('DOMSubtreeModified', function(ev) {
    var losses = $('#ajaxCont .lost').length;
    var wins = $('#ajaxCont .won').length;
    var isBetHistory = (losses > 0) || (wins > 0);

    if (isBetHistory && ($('#betStats').length === 0)) {
      $('#ajaxCont').prepend('<div id="betStats"><h3>Bet Stats</h3><div id="betStatsDetails"><progress></progress></div></div>');
      $('#betStats h3').on('click', function() {
        $('#betStatsDetails').toggle();
      });

      $('#betStats progress').attr('max', $('#ajaxCont .item').length);

      var count = 0;
      async.eachLimit($('#ajaxCont .item'), MAX_CONCURRENT_REQUESTS, function(item, callback) {
        var itemName = util.getItemName(item);
        util.getItemPrice(itemName, function(price) {
          if (price != null) {
            price = parseFloat(price.replace(/^\$/, ''));
            $('#betStats progress').attr('value', ++count);
            if (count == $('#betStats progress').attr('max')) {
              $('#betStats progress').hide();
            }
            $(item).prepend('<div class="value">$%s</div>'.replace(/%s/, price.toFixed(2)));
            $(item).data('value', price);
          }
          callback(null);
        });
      }, function(err) {
        if (!err) {
          var winnings = 0;
          var teamMap = {};
          $('#ajaxCont table tr:nth-child(3n+1):has(.won)').each(function() {
            var thisWinnings = $(this).next().next().find('.item').get().reduce(function(prev, cur) { return prev + ($(cur).data('value') || 0); }, 0);
            var leftTeam = $($(this).children('td')[2]).text();
            var rightTeam = $($(this).children('td')[4]).text();
            incTeam(teamMap, leftTeam, thisWinnings);
            incTeam(teamMap, rightTeam, thisWinnings);
            winnings += thisWinnings;
          });
          $('#ajaxCont table tr:nth-child(3n+1):has(.lost)').each(function() {
            var thisWinnings = -$(this).next().find('.item').get().reduce(function(prev, cur) { return prev + ($(cur).data('value') || 0); }, 0);
            var leftTeam = $($(this).children('td')[2]).text();
            var rightTeam = $($(this).children('td')[4]).text();
            incTeam(teamMap, leftTeam, thisWinnings);
            incTeam(teamMap, rightTeam, thisWinnings);
            winnings += thisWinnings;
          });
          $('#betStatsDetails').append('<div id="betStatsDetailsSummary">Total winnings: $' + winnings.toFixed(2) + '</div>');
          var table = $('<table id="betStatsTable" class="tablesorter"></table>');
          table.append('<thead><tr><th>Team</th><th>Bets</th><th>Won</th><th>Win rate</th><th>Winnings</th></thead>');
          var tbody = $('<tbody></tbody>');
          table.append(tbody);
          for (var teamName in teamMap) {
            tbody.append('<tr><td>%name</td><td>%bets</td><td>%won</td><td>%rate</td><td>%winnings</td></tr>'
              .replace(/%name/, teamName)
              .replace(/%bets/, teamMap[teamName].bets)
              .replace(/%won/, teamMap[teamName].won)
              .replace(/%rate/, (100 * teamMap[teamName].won / teamMap[teamName].bets).toFixed(2) + '%')
              .replace(/%winnings/, (teamMap[teamName].winnings < 0) ? ('-$' + (-teamMap[teamName].winnings).toFixed(2)) : ('$' + teamMap[teamName].winnings.toFixed(2))));
          }
          $('#betStatsDetails').append(table);
          // FIXME - tablesorter not working:
          $('#betStatsTable').tablesorter();
        }
      });
    }
  });

})();