// JavaScript Document

include('/core/javascript/ajax.js');

//this function includes all necessary js files for the application
function include(file)
{
	var script  = document.createElement('script');
	script.src  = file;
	script.type = 'text/javascript';
	script.defer = true;

	document.getElementsByTagName('head').item(0).appendChild(script);
}

function toggleSlide(obj)
{
	if(document.getElementById(obj).style.display == '')
	{
		document.getElementById('slidebtn').className = 'open';
		document.getElementById(obj).style.display = 'none';
	}
	else
	{
		document.getElementById('slidebtn').className = 'close';
		document.getElementById(obj).style.display = '';
	}
}

/* General Functions
------------------------------------- */

function GetPrevPost(ArticleID)
{
	CallAjax("latest-post", "action=GetPrevPost&ArticleID=" + ArticleID, false);
}

function GetNextPost(ArticleID)
{
	CallAjax("latest-post", "action=GetNextPost&ArticleID=" + ArticleID, false);
}

function AddComment(ArticleID)
{
	var CommentText = document.getElementById('txtComment');
	var Author = document.getElementById('nameComment');
	var Email = document.getElementById('mailComment');
	var URL = document.getElementById('urlComment');
	var ErrorDiv = document.getElementById('divID');
	
	if(Author.value != "" && Email.value != "" && CommentText.value != "")
	{
		ErrorDiv.innerHTML = '';
		
		var emailchk = emailCheck(Email.value);
		if(emailchk == "true")
		{
			CallAjax("CommentDiv", "action=AddComment&ArticleID=" + ArticleID + "&CommentText=" + fixText(CommentText.value) + "&Author=" + Author.value + "&Email=" + Email.value + "&URL=" + URL.value, false);
		
			CommentText.value = '';
			Author.value = '';
			Email.value = '';
			URL.value = '';
		}
		else ErrorDiv.innerHTML = emailchk;
	}
	else ErrorDiv.innerHTML = "Please, fill all required fields.";
	
}

function ValidateArticle()
{
	var Title = document.getElementById('Title');
	var Author = document.getElementById('Author');
	var URL = document.getElementById('URL');
	var Desc = document.getElementById('Desc');
	
	if(Title.value == "" ||
	   	Author.value == "" ||
		URL.value == "" ||
		Desc.value == "")
	{
		alert("Please fill all fields.");
	}
	else document.myform.submit();
}

function fixText(text)
{
	text = text.replace (/'/gi,'');
	return text.replace (/\n/gi,'<br>');
}


/* Fade Functions
------------------------------------- */

function show( id ) {
    var elem = document.getElementById( id );
    if( supportsOpacity( elem )) {
        // first set 0% opacity to make it completely transparent
        setOpacity( elem, 0 );
        // when we set display = "block" it's still invisible
        elem.style.display = "block";
        // call the function to gradually increase opacity
        fadeIn( id );
    } else {
        // can't modify opacity, so just make it visible...
        elem.style.display = "block";
    }
}

function hide( id ) {
    var elem = document.getElementById( id );
    elem.style.display="none";
}

function supportsOpacity( el ) {
    if ( el.style.opacity != undefined )
        return true;
    if( el.style.MozOpacity != undefined )
        return true;

    if ( el.style.filter != undefined )
        return true;
    return false;
}

function setOpacity( el, opaciLevel ) {
    if ( el.style.opacity != undefined ) {
        el.style.opacity = opaciLevel;
    } else if( el.style.MozOpacity != undefined ) {
        el.style.MozOpacity = opaciLevel;
    } else if ( el.style.filter != undefined ) {
        var oplvl = Math.round(opaciLevel*100);
        el.style.filter="alpha(opacity=" + oplvl + ")";

    }
}

function fadeIn( id, currentOpacity ) {
    var counterLimit = 20;
    var el = document.getElementById( id );
    if( !currentOpacity ) {
        currentOpacity = 1;
    }
    if( currentOpacity > counterLimit ) {
        return;
    }
    setOpacity( el, ( currentOpacity/counterLimit ) );
    currentOpacity++;
    var func = "fadeIn( '" + id + "', " + currentOpacity + ")";
    window.setTimeout( func, 50);
}

/* Ajax Functions
------------------------------------- */

function CallAjax(DivID, QString, Flag)
{
	var ctrlDiv = document.getElementById(DivID);
	
	var URL = "/core/actions.php?" + QString;
	
	if(Flag) hide(DivID);
	if (Flag) window.setTimeout("fnAjax('" + DivID + "', '" + URL + "')", 200);
	else fnAjax(DivID, URL);
	if(Flag) setTimeout("show('" + DivID + "')", 1000);
	
	//fnAjax(DivID, URL);
}

function fnAjax(DivID, URL)
{
	var _time = new Date;
	
	subject_id = DivID;
	URL = URL + "&time=" + _time.getTime();
	http.open("GET", URL, true);
	http.onreadystatechange = handleHttpResponse;
	http.send(null);
}

/* Mail Functions
------------------------------------- */

function emailCheck (emailStr) {

/* The following variable tells the rest of the function whether or not
to verify that the address ends in a two-letter country or well-known
TLD.  1 means check it, 0 means don't. */

var checkTLD=1;

/* The following is the list of known TLDs that an e-mail address must end with. */

var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum)$/;

/* The following pattern is used to check if the entered e-mail address
fits the user@domain format.  It also is used to separate the username
from the domain. */

var emailPat=/^(.+)@(.+)$/;

/* The following string represents the pattern for matching all special
characters.  We don't want to allow special characters in the address. 
These characters include ( ) < > @ , ; : \ " . [ ] */

var specialChars="\\(\\)><@,;:\\\\\\\"\\.\\[\\]";

/* The following string represents the range of characters allowed in a 
username or domainname.  It really states which chars aren't allowed.*/

var validChars="\[^\\s" + specialChars + "\]";

/* The following pattern applies if the "user" is a quoted string (in
which case, there are no rules about which characters are allowed
and which aren't; anything goes).  E.g. "jiminy cricket"@disney.com
is a legal e-mail address. */

var quotedUser="(\"[^\"]*\")";

/* The following pattern applies for domains that are IP addresses,
rather than symbolic names.  E.g. joe@[123.124.233.4] is a legal
e-mail address. NOTE: The square brackets are required. */

var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;

/* The following string represents an atom (basically a series of non-special characters.) */

var atom=validChars + '+';

/* The following string represents one word in the typical username.
For example, in john.doe@somewhere.com, john and doe are words.
Basically, a word is either an atom or quoted string. */

var word="(" + atom + "|" + quotedUser + ")";

// The following pattern describes the structure of the user

var userPat=new RegExp("^" + word + "(\\." + word + ")*$");

/* The following pattern describes the structure of a normal symbolic
domain, as opposed to ipDomainPat, shown above. */

var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$");

/* Finally, let's start trying to figure out if the supplied address is valid. */

/* Begin with the coarse pattern to simply break up user@domain into
different pieces that are easy to analyze. */

var matchArray=emailStr.match(emailPat);

if (matchArray==null) {

/* Too many/few @'s or something; basically, this address doesn't
even fit the general mould of a valid e-mail address. */

//alert("Email address seems incorrect (check @ and .'s)");
//return false;
return "Email address seems incorrect (check @ and .'s)";
}
var user=matchArray[1];
var domain=matchArray[2];

// Start by checking that only basic ASCII characters are in the strings (0-127).

for (i=0; i<user.length; i++) {
if (user.charCodeAt(i)>127) {
//alert("Ths username contains invalid characters.");
//return false;
return "Ths username contains invalid characters.";
   }
}
for (i=0; i<domain.length; i++) {
if (domain.charCodeAt(i)>127) {
//alert("Ths domain name contains invalid characters.");
//return false;
return "Ths domain name contains invalid characters.";
   }
}

// See if "user" is valid 

if (user.match(userPat)==null) {

// user is not valid

//alert("The username doesn't seem to be valid.");
//return false;
return "The username doesn't seem to be valid.";
}

/* if the e-mail address is at an IP address (as opposed to a symbolic
host name) make sure the IP address is valid. */

var IPArray=domain.match(ipDomainPat);
if (IPArray!=null) {

// this is an IP address

for (var i=1;i<=4;i++) {
if (IPArray[i]>255) {
//alert("Destination IP address is invalid!");
//return false;
return "Destination IP address is invalid!";
   }
}
return "true";
}

// Domain is symbolic name.  Check if it's valid.
 
var atomPat=new RegExp("^" + atom + "$");
var domArr=domain.split(".");
var len=domArr.length;
for (i=0;i<len;i++) {
if (domArr[i].search(atomPat)==-1) {
//alert("The domain name does not seem to be valid.");
//return false;
return "The domain name does not seem to be valid.";
   }
}

/* domain name seems valid, but now make sure that it ends in a
known top-level domain (like com, edu, gov) or a two-letter word,
representing country (uk, nl), and that there's a hostname preceding 
the domain or country. */

if (checkTLD && domArr[domArr.length-1].length!=2 && 
domArr[domArr.length-1].search(knownDomsPat)==-1) {
//alert("The address must end in a well-known domain or two letter " + "country.");
//return false;
return "The address must end in a well-known domain.";
}

// Make sure there's a host name preceding the domain.

if (len<2) {
//alert("This address is missing a hostname!");
//return false;
return "This address is missing a hostname!";
}

// If we've gotten this far, everything's valid!
return "true";
}