--[[

/*
 *  Baltisot
 *  Copyright (C) 1999-2008 Nicolas "Pixel" Noble
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

/* $Id: ajaxlib.lua,v 1.2 2008-01-15 18:20:23 pixel Exp $ */

]]--

local ajaxlib_javascript

local ajax_replacements = {
    { "&", "&" },
    { "|", "|" },
    { "=", "=" },
}

function ajax_escape(str)
    return generic_escape(str, ajax_replacements)
end

function ajax_dump_table(t, out)
    local k, v, vk, vv
    
    if type(t) ~= "table" then
        return
    end
    
    for k, v in pairs(t) do
        out:write(k)
        for vk, vv in pairs(v) do
            out:write("|" .. ajax_escape(vk) .. "=" .. ajax_escape(vv))
        end
        out:write("\n")
    end
end

function write_ajax_javascript(out)
    out:write(ajaxlib_javascript)
end

ajaxlib_javascript = [[
var loading = 0;

function ajax_loading(v)
{
    var obj = getObjById("ajax_loader")

    if (obj) {
        obj.style.visibility = v ? "visible" : "hidden";
    }
}

function ajax_unescape(str)
{
    return str.replace(/&#(\d+);/g, function() {
        return String.fromCharCode(RegExp.$1);
    });
}

function ajax_hub(ajax_request, callback)
{
    if (ajax_request.readyState != 4)
        return;

    var res = ajax_request.responseText;
    
    ajax_request = null;
    callback(res);
    loading--;
    ajax_loading(loading != 0);
}

function ajax_create(url, callback)
{
    var ajax_request;

    loading++;
    ajax_loading(true);

    ajax_request = new XMLHttpRequest();
    ajax_request.onreadystatechange = function() { ajax_hub(ajax_request, callback) };
    ajax_request.open("GET", url, true);
    ajax_request.send(null);
}

function ajax_do_get_data(res)
{           
    var lines;
    var t = new Array();
    var c;
    var pair;
    var i, j, k, res;
    
    lines = res.split('\n');

    for (i = 0, c = 0; i < lines.length; i++) {
        if (lines[i] == "")
            continue;
        if (lines[i][0] == "#")
            continue;
        t[c++] = lines[i].split('|');
    }
    
    res = {}

    for (i = 0; i < t.length; i++) {
        k = t[i][0];
        res[k] = {};
        for (j = 1; j < t[i].length; j++) {
            pair = t[i][j].split("=");
            res[k][ajax_unescape(pair[0])] = ajax_unescape(pair[1]);
        }
    }
    
    return res;
}
]]