/**
* Will escape a string to be used in a RegExp
*/
RegExp.escape = function( text, space_fix ) {

	if ( !arguments.callee.sRE ) {
		arguments.callee.sRE = /(\/|\.|\*|\+|\?|\||\(|\)|\[|\]|\{|\}|\\|\$|\^)/g;
	}

	text = text.replace( arguments.callee.sRE , '\\$1' );

	// Special Mediawiki escape, underscore/space is the same, often at lest:

	if( space_fix ) {
		text = text.replace( / |_/g, '[_ ]' );
	}

	return text;

}


// Simple helper functions to see what groups a user might belong

function userIsInGroup( group ) {

	return ( wgUserGroups != null && wgUserGroups.indexOf( group ) != -1 ) || ( wgUserGroups == null && group == 'anon' );
}

function userIsAnon() {
	return wgUserGroups == null;
}

// AOL Networks
var AOLNetworks = [
	'64.12.96.0/19',
	'149.174.160.0/20',
	'152.163.0.0/16',
	'195.93.0.0/17',
	'198.81.0.0/19',
	'202.67.64.128/25',
	'205.188.0.0/16',
	'207.200.112.0/21'
];

/**
* ipadress is in the format 1.2.3.4 and network is in the format 1.2.3.4/5
*/

function isInNetwork( ipaddress, network ) {
	var iparr = ipaddress.split('.');
	var ip = (parseInt(iparr[0]) << 24) + (parseInt(iparr[1]) << 16) + (parseInt(iparr[2]) << 8) + (parseInt(iparr[3]));

	var netmask = 0xffffffff << network.split('/')[1];

	var netarr = network.split('/')[0].split('.');
	var net = (parseInt(netarr[0]) << 24) + (parseInt(netarr[1]) << 16) + (parseInt(netarr[2]) << 8) + (parseInt(netarr[3]));

	return (ip & netmask) == net;
}

/**
* Maps the querystring to an object
*
* Functions:
*
* QueryString.exists(key)
*     returns true if the particular key is set
* QueryString.get(key)
*     returns the value associated to the key
* QueryString.equals(key, value)
*     returns true if the value associated with given key equals given value
* QueryString.toString()
*     returns the query string as a string
*
* Optional parameter to exists, get and equals, can define another query string, but remember that that string wont be cached.
*/

function QueryString() {}

QueryString.init = function(str) {
	var params = {};

	if( QueryString.params != null && !str ) {
		return;
	}
	if ( !str ) {
		QueryString.params = {};
	}
	var queryString = str || location.search.substring(1);

	if(queryString.length == 0) {
		return;
	}

	if( !str ) {
		QueryString.str = queryString;
	}

	queryString.replace(/\+/, ' ');

	var args = queryString.split('&');

	for( var i in args ) {
		var pair = args[i].split( '=' );
		var key = decodeURI( pair[0] ), value = key;

		if( pair.length == 2 ) {
			value = decodeURI( pair[1] );
		}

		params[key] = value;
	}

	if( !str ) {
		QueryString.params = params;
	}

	return params;
}

QueryString.get = function(key, str) {
	if( str ) {
		var val = QueryString.init(str)[key];
		return val ? val : null;
	} else if( QueryString.params == null ) {
		QueryString.init();
	}
	return QueryString.params[key] ? QueryString.params[key] : null;
};

QueryString.exists = function(key, str) {
	if( str ) {
		return QueryString.init(str)[key] ? true : false;
	} else if( QueryString.params == null ) {
		QueryString.init();
	}

	return QueryString.params[key] ? true : false;
}

QueryString.equals = function(key, value, str) {
	if (str ) {
		return QueryString.init(str)[key] == value ? true : false;
	} else if( QueryString.params == null ) {
		QueryString.init();
	}
	return QueryString.params[key] == value ? true : false;
}

QueryString.toString = function() {
	if( QueryString.str == null ) {
		QueryString.init();
	}
	return QueryString.str ? QueryString.str : null;
}

QueryString.create = function( arr ) {
	var resarr = Array();
	for( var i in arr ) {
		if( typeof arr[i] == 'object' ){
			var v =  Array();
			for(var j in arr[i] ) {
				v[j] = encodeURI( arr[i][j] );
			}
			resarr.push( encodeURI( i ) + '=' +  v.join('|')  );
		} else {
			resarr.push( encodeURI( i ) + '=' + encodeURI( arr[i] ) );
		}
	}

	return resarr.join('&');

}

QueryString.params = null;
QueryString.str = null;

/**
* Simple exception handling
*/

Exception = function( str ) {
	this.str = str || '';
}

Exception.prototype.what = function() {
	return this.str;
}

/**
* Status updating class
*/

Status = function() {}

/*
Initiate an element to be a status window, it will remove all it's childs
*/
Status.init = function( elem ) {

	if( !( elem instanceof Element ) ) {
		throw new Exception( 'object not an instance of Element' );
	}

	Status.elem = elem;
	Status.currentNode = null;

	while( elem.hasChildNodes() ) {
		elem.removeChild( elem.firstChild );
	}
}

// Private function
Status.append = function( obj, node ) {

	if( Status.elem == null ) {
		throw new Exception( 'no initialized object found' );
	}

	if ( ! ( obj instanceof Array ) ) {
		obj = [ obj ];
	}

	node = node || Status.currentNode;

	for( var i in obj ) {
		if( typeof obj[i] == 'string' ) {
			node.appendChild( document.createTextNode( obj[i] ) );
		} else {
			node.appendChild( obj[i] );
		}
	}
}

Status.error = function( obj ) {
	Status.currentNode = document.createElement( 'div' );
	Status.currentNode.style.color = 'OrangeRed';
	Status.currentNode.style.fontWeight = '900';
	Status.append( obj );
	Status.elem.appendChild( Status.currentNode );
	return Status.currentNode;
}

Status.warn = function( obj ) {
	Status.currentNode = document.createElement( 'div' );
	Status.currentNode.style.color = 'OrangeRed';
	Status.append( obj );
	Status.elem.appendChild( Status.currentNode );
	return Status.currentNode;
}

Status.info = function( obj ) {
	Status.currentNode = document.createElement( 'div' );
	Status.currentNode.style.color = 'ForestGreen';
	Status.append( obj );
	Status.elem.appendChild( Status.currentNode );
	return Status.currentNode;
}

Status.debug = function( obj , level ) {
	level = level || 1;
	if( Status.debugLevel >= level ) {
		Status.currentNode = document.createElement( 'div' );
		Status.currentNode.style.color = 'DimGray';
		Status.append( "Debug (" + level + "): " );
		Status.append( obj );
		Status.elem.appendChild( Status.currentNode );
		return Status.currentNode;
	} else {
		return null;
	}
}

Status.debugLevel = 0;

Status.status = function( obj ) {
	Status.currentNode = document.createElement( 'div' );
	Status.currentNode.style.color = 'SteelBlue';
	Status.append( obj );
	Status.elem.appendChild( Status.currentNode );
	return Status.currentNode;
}

Status.progress = function ( obj, node ) {
	Status.append( obj, node );	
}

// Simple helper function to create a simple node
function htmlNode( type, content, color ) {
	var node = document.createElement( type );
	if( color ) {
		node.style.color = color;
	}
	node.appendChild( document.createTextNode( content ) );
	return node;
}

// A simple dragable window

function SimpleWindow( width, height ) {
	this.width = width;
	this.height = height;
	this.frame = document.createElement( 'div' );
	SimpleWindow.frames.push( this.frame );
	this.topbar = document.createElement( 'div' );
	this.topbarover = document.createElement( 'div' );
	this.closeButton = document.createElement( 'span' );
	this.frame.appendChild( this.topbar );
	this.topbarover.appendChild( this.closeButton );


	this.frame.style.zIndex = 100;
	this.frame.style.width = width + 'px';
	this.frame.style.height = height + 'px';
	this.frame.style.position = 'fixed';
	this.frame.style.background = 'AliceBlue';
	this.frame.style.border = '2px ridge Black';
	this.frame.simpleWindow = this;
	this.frame.addEventListener( 'mousedown', this.focus, true );

	this.closeButton.appendChild( document.createTextNode( '[close]' ) );
	this.closeButton.style.position = 'absolute';
	this.closeButton.style.fontWeight = '100';
	this.closeButton.style.fontSize = '0.7em';
	this.closeButton.style.top = '0px';
	this.closeButton.style.left = '0px';
	this.closeButton.style.cursor = 'pointer';
	this.closeButton.simpleWindow = this;
	this.closeButton.addEventListener( 'click', this.close, false );

	this.topbar.style.width = '100%';
	this.topbar.style.height = '20px';
	this.topbar.style.background = 'LightSteelBlue';
	this.topbar.style.position = 'absolute';
	this.topbar.style.fontWeight = '900';
	this.topbar.style.fontSize = '1em';
	this.topbar.style.fontFamily = 'sans-serif';
	this.topbar.style.textAlign = 'center';
	this.topbar.style.verticalAlign = 'baseline';
	this.topbar.style.top = '0px';
	this.topbar.style.left = '0px';

	this.topbarover.style.width = '100%';
	this.topbarover.style.height = '24px';
	this.topbarover.style.position = 'absolute';
	this.topbarover.style.top = '0px';
	this.topbarover.style.left = '0px';
	this.topbarover.simpleWindow = this;
	this.topbarover.addEventListener( 'mousedown', this.beginMove, true );

}

SimpleWindow.prototype.focus = function(e) {
	for( var i in SimpleWindow.frames ) {
		SimpleWindow.frames[i].style.zIndex = 99;
	}

	this.simpleWindow.frame.style.zIndex = 100;

}

SimpleWindow.prototype.display = function() {

	this.title = this.title || "Title";
	this.content = this.content || document.createTextNode( "" );
	this.topbar.appendChild( document.createTextNode( this.title ) );

	var content = document.createElement( 'div' );
	content.style.position = 'relative';
	content.style.top = '20px';
	content.style.height = ( this.height -  20 ) + 'px';
	content.style.overflow = 'auto';
	content.appendChild( this.content );
	this.frame.appendChild( content );
	this.frame.appendChild( this.topbarover );
	this.frame.style.width = this.width + 'px';
	this.frame.style.height = this.height + 'px';

	this.frame.style.top = (window.innerHeight - this.height  )/2 + 'px' ;
	this.frame.style.left = (window.innerWidth - this.width  )/2 + 'px';
	document.getElementsByTagName('body')[0].appendChild( this.frame );
}

SimpleWindow.prototype.close = function(e) {
	if( e ) {
		this.simpleWindow.frame.parentNode.removeChild(this.simpleWindow.frame);
	} else {
		this.frame.parentNode.removeChild(this.frame);
	}
}

SimpleWindow.prototype.setWidth = function( width ) {
	this.width = width;
}

SimpleWindow.prototype.setHeight = function( height ) {
	this.height = height;
}

SimpleWindow.prototype.setTitle = function( title ) {
	this.title = title;
}

SimpleWindow.prototype.setContent = function( content ) {
	this.content = content;
}

SimpleWindow.frames = [];

SimpleWindow.prototype.currentObject = null;

SimpleWindow.prototype.beginMove = function(e) {
	if( e.button != 0 ) {
		return;
	}
	this.simpleWindow.initX = e.layerX;
	this.simpleWindow.initY = e.layerY;
	this.simpleWindow.lastX = e.clientX;
	this.simpleWindow.lastY = e.clientY;
	SimpleWindow.currentObject = this.simpleWindow;

	window.addEventListener( 'mousemove', SimpleWindow.moveWindow, false );
	window.addEventListener( 'mouseup', function(e) { 
		SimpleWindow.currentObject = null;
		window.removeEventListener( 'mousemove', SimpleWindow.moveWindow, false );
		window.removeEventListener( 'mouseup', SimpleWindow.moveWindow, false );
	}, false );
}

SimpleWindow.moveWindow = function(e) {
	if( SimpleWindow.currentObject == null ) {
		return;
	}
	var y = e.clientY - SimpleWindow.currentObject.initY;
	var x = e.clientX - SimpleWindow.currentObject.initX;

	SimpleWindow.currentObject.frame.style.top  = y + 'px';
	SimpleWindow.currentObject.frame.style.left = x + 'px';
	e.stopPropagation();
}