// Copyright (c) 2007 Legendum LLC
// This code may be used for free,
// provided this notice is included.

var thisAPI = null;
function API(token)
{
    this.token = token;
    this.request = 1;
    this.transport = 'http://www.net-filter.com/api/';
    this.callbacks = [];

    // Call an external JavaScript file to get JSON data

    this.script = function(file)
    {
        thisAPI = this;
        var element = document.createElement('SCRIPT');
        element.src = this.transport + file;
        element.type = 'text/javascript';
        var head=document.getElementsByTagName('HEAD')[0];
        head.appendChild(element);
    }

    // Get the API token

    this.getToken = function()
    {
        return this.token;
    }

    // Get the API token for a username and password (async)

    this.getTokenForUser = function(args)
    {
        var username = args.username;
        var password = args.password;
        var request = this.request++;
        this.callbacks[request] = args.callback;
        this.script('token.cgi?callback=thisAPI.onToken&request=' + request + '&format=json&username=' + username + '&password=' + password);
    }

    // Send JSON token data to any callback function

    this.onToken = function(json)
    {
        this.token = json.token.text;
        var request = json.stats.request;
        if (this.callbacks[request]) this.callbacks[request].call(this, this.token);
    }

    // Get site channel report data for an API token (async)

    this.getChannelReports = function(caller, args, secs)
    {
        var site = args.site;
        var channel = args.channel ? args.channel : 0;
        var date = args.date ? args.date : 0;
        var start_date = args.start_date ? args.start_date : 0;
        var end_date = args.end_date ? args.end_date : 0;
        var group_by = args.group_by ? args.group_by : '';
        var report = args.report;
        var request = this.request++;
        this.callbacks[request] = [args.callback, caller];
        var url = 'sitester.cgi?callback=thisAPI.onJSON&request=' + request + '&format=json&token=' + this.token + '&site=' + site + '&channel=' + channel + '&date=' + date + '&start_date=' + start_date + '&end_date=' + end_date + '&group_by=' + group_by + '&report=' + report;
        this.script(url);
        if (secs) setInterval("thisAPI.script('" + url + "')", secs * 1000);
    }

    // Get site traffic data for an API token (async)

    this.getChannelTraffic = function(caller, args, secs)
    {
        var site = args.site;
        var date = args.date ? args.date : 0;
        var limit = args.limit ? args.limit : 100;
        var request = this.request++;
        this.callbacks[request] = [args.callback, caller];
        var url = 'traffic.cgi?callback=thisAPI.onJSON&request=' + request + '&format=json&token=' + this.token + '&site=' + site + '&date=' + date + '&limit=' + limit;
        this.script(url);
        if (secs) setInterval("thisAPI.script('" + url + "')", secs * 1000);
    }

    // Return a JSON object to the calling object

    this.onJSON = function(json)
    {
        // Get the callback from the request ID

        var request = json.stats.request;
        var callback = this.callbacks[request];
        if (callback)
        {
            // Call the callbback with the JSON data object

            callback[0].call(callback[1], json.site.channel);
        }
    }
};