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There are 7 previous versions of this script.

// ==UserScript==
// @name           Travian Market Overflow/Depletion
// @namespace      market_overflow_depletion
// @description    Travian Market Overflow/Depletion timers for resources considering arriving merchants
// @version        1.0.1
// @author         benuix
// @include        http://s*.travian*.*/build.php*
// @exclude        http://s*.travian*.*/build.php*t=*
// ==/UserScript==
// Included page: marketplace - send recources

var lang=new Array();
lang['gr']="Δικοί μου έμποροι στον δρόμο";
lang['com']="Own merchants underway";
lang['dk']= "Dine handelsmænd er på vej";


function getElementsByClass(searchClass,node,tag) {
	var classElements = new Array();
	if ( node == null )
		node = document;
	if ( tag == null )
		tag = '*';
	var els = node.getElementsByTagName(tag);
	var elsLen = els.length;
	var pattern = new RegExp("(^|\\s)"+searchClass+"(\\s|$)");
	for (i = 0, j = 0; i < elsLen; i++) {
		if ( els[i].className==searchClass ) {
			classElements[j] = els[i];
			j++;
		}
	}
	return classElements;
}


function find(xpath, xpres, startnode){
		if (!startnode) {startnode = document;}
		var ret = document.evaluate(xpath, startnode, null, xpres, null);
		return  xpres == XPFirst ? ret.singleNodeValue : ret;
	}

function isMarketSendResourcesPage() {
		var boolMLink1 = false;
		var boolMLink2 = false;
		var boolMarketResources = false;
		var forms=document.getElementsByTagName("form");	
		for(i=0;i<forms.length;i++)
		if (forms[i].name=='snd' && forms[i].action.indexOf('build.php')!=-1) {

			var mLinks = document.getElementsByTagName("a");
			for (xi = 0; xi < mLinks.length; xi++) {
				if (mLinks[xi].href.indexOf("&t=1") != -1) boolMLink1 = true;
				if (mLinks[xi].href.indexOf("&t=2") != -1) boolMLink2 = true;
			}
			var inputs=document.getElementsByTagName("input");
			var sn=0;
			for(j=0;j<inputs.length;j++)
				if(inputs[j].type=="text")sn++;
			if (boolMLink1 && boolMLink2 && sn > 6) boolMarketResources = true;
		}
		return boolMarketResources;
	}

function finddepletiontime(res,incomingLinks){
var croptd=document.getElementById('l'+res);
var croparr=croptd.innerHTML.split("/");
var crop=croparr[0];
var maxcropstorage=croparr[1];
var cropproduction=croptd.title/3600;

var sum=crop;
var mul=1;
var ret="<td ><font color='red'>";
if(cropproduction<0){
	cropproduction*=-1;
	if(crop<=0){t--;return ret+"00:00:00</font></td>";}
}else{ 
	sum=maxcropstorage-crop;
	mul=-1;
	ret="<td ><font color='black'>";
	if(sum<=0) {t--;return ret+"00:00:00</font></td>";}
}

var savedtime=0;
var remaining=0;

for(i=0;i<incomingLinks.length;i++){
	remaining=sum/cropproduction;

	var timerhtml=document.getElementById("timer"+(i+1)).innerHTML;
	var timerarr=timerhtml.split(":");

	var incomingtime=Number(timerarr[0])*3600+Number(timerarr[1])*60+Number(timerarr[2])-savedtime;
	var income_html=incomingLinks[i].innerHTML;
	var income_array=income_html.split("|");
		var income=income_array[4-res];
		var ind=income.lastIndexOf(">");
		var num=Number(income.substring(ind+1));

			if(remaining>=incomingtime){
				sum-=cropproduction*incomingtime;
				sum+=mul*num;
				if(mul==1){
						if(sum>maxcropstorage)sum=maxcropstorage;
					}else{
						if(sum<0)sum=0;

					}
				savedtime+=incomingtime;
			}else break;
}
remaining=savedtime+sum/cropproduction;

var h=Math.floor(remaining/3600);
var m=Math.floor((remaining-h*3600)/60);
var s=Math.floor(remaining-h*3600-m*60);

ret+="<span id='timer"+t+"'>"+h+":"+m+":"+s+"</span></font></td>";
return ret;
}




var t=1;

function createTable(){
var htmlbody=document.body.cloneNode(true);
 var sLang = location.hostname.substring(location.hostname.lastIndexOf('.') + 1);

var ind=htmlbody.innerHTML.indexOf(lang[sLang]+":</p>");
var newhtmlbody=htmlbody;
if(ind!=-1){
	newhtmlbody.innerHTML=htmlbody.innerHTML.substring(0,ind)+"</p>";
}

var incomingLinks = getElementsByClass("f10",newhtmlbody,"span");
	

while(document.getElementById("timer"+t)){t++;}

var wood=finddepletiontime(4,incomingLinks);t++;
var clay=finddepletiontime(3,incomingLinks);t++;
var iron=finddepletiontime(2,incomingLinks);t++;
var crop=finddepletiontime(1,incomingLinks);

var tablehtml="<table  style='background-color:#F5F5F5;border:1px solid silver;'><tr>"+
"<td '><img class=\"r1\" src=\"img/x.gif\" alt=\"Ξύλο\" title=\"Ξύλο\"></td>"+
"<td ><img class=\"r2\" src=\"img/x.gif\" alt=\"Πηλός\" title=\"Πηλός\"></td>"+
"<td ><img class=\"r3\" src=\"img/x.gif\" alt=\"Σίδερο\" title=\"Σίδερο\"></td>"+
"<td ><img class=\"r4\" src=\"img/x.gif\" alt=\"Σιτάρι\" title=\"Σιτάρι\"></td>"+
"</tr><tr>"+wood+clay+iron+crop+
"</tr></table>";
var ps=document.getElementById("btn_ok").parentNode.nextSibling.nextSibling.nextSibling;

var table=document.createElement("table");
table.innerHTML=tablehtml;
ps.parentNode.insertBefore(table,ps);

}


if(isMarketSendResourcesPage()) createTable();