Addon/log.js

/**
* Get the log and display the data as table.
*/
var log = [];

/**
* Reset the global log
*/
function resetGlobalLog(){
    browser.storage.local.remove("log");
    browser.storage.local.set({"resetLog": true});
    location.reload();
}

/**
* Get the log and display to the user
*/
function getLog()
{
    browser.storage.local.get('log', function(data) {
        if(data.log)
        {
            log = JSON.parse(data.log);
        }
        else{
            //Create foundation for log variable
            log = {"log": []};
        }

        var length = Object.keys(log.log).length;
        var row;
        if(length != 0)
        {
            for(var i=0; i<length;i++)
            {
                row = "<tr>"
                + "<td>"+log.log[i].before+"</td>"
                + "<td>"+log.log[i].after+"</td>"
                + "<td>"+log.log[i].rule+"</td>"
                + "<td>"+toDate(log.log[i].timestamp)+"</td>";
                $('#tbody').append(row);
            }
        }
        $('#logTable').DataTable({
            "pageLength": 5
        } ).order([3, 'desc']).draw();
    });
}

/**
* Convert timestamp to date
*/
function toDate(time)
{
    return new Date(time).toLocaleString();
}

/**
* Load only when document is ready
*/
$(document).ready(function(){
    getLog();
    $('#reset_log_btn').on("click", resetGlobalLog);
});