// ==UserScript==
// @name           GayRomeo_VisitorCheck
// @namespace      http://www.stillewasser.info/GayRomeoMods
// @description    Periodically checks for new visitors on your profile
// @include        http*://www.gayromeo.com/*/main/shortcuts.php
// @include        http*://www.gayromeo.de/*/main/shortcuts.php
// @include        http*://www.planetromeo.com/*/main/shortcuts.php
// @include        http*://www.planetromeo.de/*/main/shortcuts.php
// @include        http*://83.98.143.20/*/main/shortcuts.php
// @version        0.1.5
// ==/UserScript==


var checkInterval = 30000;
var visitorLinkDivHighlightStyle = "background:#800000";

var visitorLinkDiv = null;
var visitorPageLink = null;
var lastVisitor = null;
var lastTapsDiv = null;
var lastTaps = null;

function resetVisitorColor() {
		visitorLinkDiv.setAttribute("style", "");
}

function setVisitorColor() {
		visitorLinkDiv.setAttribute("style", visitorLinkDivHighlightStyle);
}

function checkLastVisitor() {
    var req = new XMLHttpRequest();
    req.open('GET', visitorPageLink, true);
    req.onreadystatechange = function (aEvt) {
        if (req.readyState == 4 && req.status == 200) {
           evaluateResponse(req.responseText);
        }  
    };
    req.send(null); 
}

function evaluateResponse(docText) {

    var doc = document.createElement("body");
    doc.innerHTML = getBody(docText)
    
    checkVisitor(doc);
		checkTaps(doc);
}

function checkVisitor(doc) {
	  var list = document.evaluate(
        "//td[@class='resHeadline']/a", 
        doc, 
        null, 
        XPathResult.ORDERED_NODE_SNAPSHOT_TYPE,
        null);
        
    if (list.snapshotLength > 0) {
        var currentLastVisitor = list.snapshotItem(0).firstChild.nodeValue;
        if ((lastVisitor != null) && (lastVisitor != currentLastVisitor)) {
            setVisitorColor();
        } 
        lastVisitor = currentLastVisitor;
        
        if (visitorName.hasChildNodes()) {
        		visitorName.removeChild(visitorName.firstChild);
        }
        
        visitorName.appendChild( list.snapshotItem(0));
    }
}



function checkTaps(doc) {
	  var list = document.evaluate(
        "//img[contains(@src,'/footprints/')]", 
        doc, 
        null, 
        XPathResult.ORDERED_NODE_SNAPSHOT_TYPE,
        null);
		
		var oldTaps = lastTapsDiv.firstChild;
		var removeTaps = true;
		
		if (list.snapshotLength > 0) {
			  
			  var tapsImg = list.snapshotItem(0);
			  if (tapsImg.title.split(" ")[0] == lastVisitor) {
					if (oldTaps != null) {
							lastTapsDiv.removeChild(oldTaps);
					} 
	        lastTapsDiv.appendChild(tapsImg);
	        list.snapshotItem(0).removeAttribute("align");
	        removeTaps = false;
      	}

    } 
    
    if (oldTaps != null && removeTaps) {
				lastTapsDiv.removeChild(oldTaps);
		}     
}


function getBody(content) 
{ 
   var x = content.indexOf("<body");
   x = content.indexOf(">", x);    
   var y = content.lastIndexOf("</body>"); 
   return content.slice(x + 1, y);
} 


var linkList = document.evaluate(
    "//a[@href]", 
    document, 
    null, 
    XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE,
    null);

var len = linkList.snapshotLength;
for (var i = 0; i < len; i++) {
		var item = linkList.snapshotItem(i);
		var link = item.getAttribute("href");
		if (link.indexOf("/search/index.php?action=execute&searchType=myVisitors") >= 0) {
		    item.setAttribute("accesskey", "b");
		    
		    visitorLinkDiv = item.parentNode;
                    link = link.replace(/\.\./,""); //
		    visitorPageLink = location.protocol + "//" + location.host + link;
				visitorLinkDiv.addEventListener("click", resetVisitorColor, false);
				
				var lastVisitorDiv = document.createElement("div");
				visitorLinkDiv.appendChild(lastVisitorDiv);
				
				lastVisitorDiv.appendChild(document.createTextNode("\u00A0\u00bb "));
				
				visitorName = document.createElement("span");
				lastVisitorDiv.appendChild(visitorName);
				visitorName.appendChild(document.createTextNode("..."));
				
				lastTapsDiv = document.createElement("div");
				lastTapsDiv.setAttribute("style", "width:100%;text-align:center")
				lastTapsDiv.appendChild(document.createTextNode(""));
				lastVisitorDiv.appendChild(lastTapsDiv);
				
				checkLastVisitor();
				setInterval(checkLastVisitor, checkInterval);

		    break;
		}
}