// ============================================================================
// Developed by Kernel Team.
// http://kernel-team.com
// ============================================================================

String.prototype.trim = function() {
    return this.replace(/^\s+/, '').replace(/\s+$/, '');
}

// Common functions for reuse =================================================

function stub() {
}

function commonGet(id) {
    return document.getElementById(id);
}

function commonValidId(id) {
    return (id && commonGet(id));
}

function commonGetElementPos(element) {
    var x = 0;
    var y = 0;
    if (element && element.offsetParent) {
        while (element) {
            x += element.offsetLeft;
            y += element.offsetTop;
            element = element.offsetParent;
        }
    }
    return [x, y];
}

function commonGetElementSize(element) {
    var w = 0;
    var h = 0;
    if (element) {
        w = element.offsetWidth;
        h = element.offsetHeight;
    }
    return [w, h];
}

function commonCreateCookie(name, value, days) {
    var expires = '';
    if (days) {
        var date = new Date();
        date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
        expires = '; expires=' + date.toGMTString();
    }
    document.cookie = name + "=" + value + expires + "; path=/; domain=." + location.host.replace('www.','');
}

function commonReadCookie(name) {
    var nameEQ = name + '=';
    var ca = document.cookie.split(';');
    for (var i = 0; i < ca.length; i++) {
        var c = ca[i];
        while (c.charAt(0) == ' ') {
            c = c.substring(1, c.length);
        }
        if (c.indexOf(nameEQ) == 0) {
            return c.substring(nameEQ.length, c.length);
        }
    }
    return null;
}

function commonSendRequestTxt(url, data, isPost, callback) {
    var req = null;
    if (window.XMLHttpRequest) {
        req = new XMLHttpRequest();
    } else if (window.ActiveXObject) {
        req = new ActiveXObject('Microsoft.XMLHTTP');
    }
    if (!req) {
        return null;
    }
    try {
        var postData = null;
        var method = null;
        if (isPost) {
            method = 'POST';
            postData = data;
        } else if (!data) {
            method = 'GET';
        } else if (data.length > 0) {
            method = 'GET';
            if (url.indexOf('?') >= 0) {
                url += '&' + data;
            } else {
                url += '?' + data;
            }
        }
        req.open(method, encodeURI(url), true);
        if (method == 'POST') {
            req.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
        }
        req.onreadystatechange = function() {
            if (req.readyState == 4) {
                if (req.status == 200) {
                    callback(req.responseText);
                } else {
                    callback(null);
                }
            }
        };
        req.send(postData);
    } catch (e) {
        return e;
    }
    return null;
}

// Pagination functions =======================================================

var paginationConfiguredBlocks = {};
var paginationIsWaiting = false;
var paginationWaitIcon = null;

function paginationEnableBlock(params) {
    var container = params['container_id'];
    var paginationContainer = params['pagination_container_id'];
    var pleaseWaitIcon = params['please_wait_icon'];
    var pleaseWaitIconTimeout = params['please_wait_icon_timeout_ms'];
    var requestError = params['request_error'];

    if (!commonValidId(container) || !commonValidId(paginationContainer)) {
        return;
    }

    if (paginationConfiguredBlocks[container]) {
        return;
    }
    paginationConfiguredBlocks[container] = true;

    if (pleaseWaitIcon) {
        paginationWaitIcon = new Image();
        paginationWaitIcon.src = pleaseWaitIcon;
        paginationWaitIcon.style.position = 'absolute';
        paginationWaitIcon.style.zIndex = 1000;
        paginationWaitIcon.style.visibility = 'hidden';
        document.getElementsByTagName('BODY')[0].appendChild(paginationWaitIcon);
    }

    var callbackFunction = function(text) {
        paginationIsWaiting = false;

        if (text) {
            paginationShowWaitIcon(false, paginationContainer);

            var expr = new RegExp('\\?mode=async&action=get_block&block_id=' + container, 'g');
            var expr2 = new RegExp('&mode=async&action=get_block&block_id=' + container, 'g');
            var html = text;
            html = html.replace(expr, '');
            html = html.replace(expr2, '');

            commonGet(container).innerHTML = html;

            var links = commonGet(paginationContainer).getElementsByTagName('A');
            for (var i = 0; i < links.length; i++) {
                links[i].onclick = function() {
                    paginationIsWaiting = true;
                    setTimeout('paginationShowWaitIcon(true, \'' + paginationContainer + '\')', pleaseWaitIconTimeout);
                    commonSendRequestTxt(this.href, 'mode=async&action=get_block&block_id=' + container, false, callbackFunction);
                    return false;
                };
            }
        } else {
            paginationShowWaitIcon(false, paginationContainer, requestError);
        }
    };

    var links = commonGet(paginationContainer).getElementsByTagName('A');
    for (var i = 0; i < links.length; i++) {
        links[i].onclick = function() {
            paginationIsWaiting = true;
            setTimeout('paginationShowWaitIcon(true, \'' + paginationContainer + '\')', pleaseWaitIconTimeout);
            commonSendRequestTxt(this.href, 'mode=async&action=get_block&block_id=' + container, false, callbackFunction);
            return false;
        };
    }
}

function paginationShowWaitIcon(show, containerId, error) {
    if (show && paginationIsWaiting) {
        var size = commonGetElementSize(commonGet(containerId));
        var pos = commonGetElementPos(commonGet(containerId));

        paginationWaitIcon.style.left = ((size[0] - paginationWaitIcon.offsetWidth) / 2 + pos[0]) + 'px';
        paginationWaitIcon.style.top = ((size[1] - paginationWaitIcon.offsetHeight) / 2 + pos[1]) + 'px';
        paginationWaitIcon.style.visibility = 'visible';
    } else {
        paginationWaitIcon.style.visibility = 'hidden';
        if (error) {
            alert(error);
        }
    }
}

// Statistics functions =======================================================

commonCreateCookie('kt_tcookie', '1', 1);
if (commonReadCookie('kt_tcookie') == '1') {
    var img = new Image();
    img.src = '?mode=async&action=js_stats&rand=' + new Date().getTime();;
}