logfixer

<html>
<head>
<script src="https://code.jquery.com/jquery-3.4.1.min.js" integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo=" crossorigin="anonymous"></script>
<script type="text/javascript">

function fix() {
    var content = $("#log").val();
    content = content.replace(/\n/g, ";" ).split( ";" );

    for (var i = 0; i < content.length; i++)
    {
        if (content[i].toLowerCase().indexOf("spell_periodic_damage") > -1)
        {
            var arrayOfLine = content[i].split(",");
            arrayOfLine[26] = "-1";
            content[i] = arrayOfLine.join(",");
        }
    }

    $("#logResult").val(content.join("\n"));
}
</script>
<style type="text/css">
textarea {
  white-space: pre;
  overflow-wrap: normal;
  overflow-x: scroll;
}
</style>
</head>
<body>

<textarea id="log" rows="50" cols="200" wrap="soft" onkeyup="fix()" placeholder="paste log here">
</textarea>
<textarea id="logResult" rows="50" cols="200" wrap="soft" readonly>
</textarea>
</body>
</html>