function handleVote()

in content/releases/content/1.10.1/_static/websupport.js [426:483]

• 34 lines of code
• 12 McCabe index (conditional complexity)

  function handleVote(link) {
    if (!opts.voting) {
      showError("You'll need to login to vote.");
      return;
    }

    var id = link.attr('id');
    if (!id) {
      // Didn't click on one of the voting arrows.
      return;
    }
    // If it is an unvote, the new vote value is 0,
    // Otherwise it's 1 for an upvote, or -1 for a downvote.
    var value = 0;
    if (id.charAt(1) != 'u') {
      value = id.charAt(0) == 'u' ? 1 : -1;
    }
    // The data to be sent to the server.
    var d = {
      comment_id: id.substring(2),
      value: value
    };

    // Swap the vote and unvote links.
    link.hide();
    $('#' + id.charAt(0) + (id.charAt(1) == 'u' ? 'v' : 'u') + d.comment_id)
      .show();

    // The div the comment is displayed in.
    var div = $('div#cd' + d.comment_id);
    var data = div.data('comment');

    // If this is not an unvote, and the other vote arrow has
    // already been pressed, unpress it.
    if ((d.value !== 0) && (data.vote === d.value * -1)) {
      $('#' + (d.value == 1 ? 'd' : 'u') + 'u' + d.comment_id).hide();
      $('#' + (d.value == 1 ? 'd' : 'u') + 'v' + d.comment_id).show();
    }

    // Update the comments rating in the local data.
    data.rating += (data.vote === 0) ? d.value : (d.value - data.vote);
    data.vote = d.value;
    div.data('comment', data);

    // Change the rating text.
    div.find('.rating:first')
      .text(data.rating + ' point' + (data.rating == 1 ? '' : 's'));

    // Send the vote information to the server.
    $.ajax({
      type: "POST",
      url: opts.processVoteURL,
      data: d,
      error: function(request, textStatus, error) {
        showError('Oops, there was a problem casting that vote.');
      }
    });
  }