MediaWiki:Gadget-morebits.js

/**
 * morebits.js
 * ===========
 * A library full of lots of goodness for user scripts on Wikipedia.
 * (It should work on other MediaWiki wikis as well, despite some Wikipedia-specific object naming.)
 *
 * The highlights include:
 *   - QuickForm class - generates quick HTML forms on the fly
 *   - Wikipedia.api class - makes calls to the Wikipedia API (or the API of any MediaWiki wiki)
 *   - Wikipedia.page class - modifies pages on the wiki (edit, revert, delete, etc.)
 *   - MediaWiki class - contains some utilities for dealing with wikitext
 *   - Status class - a rough-and-ready status message displayer, used by the Wikipedia classes
 *   - SimpleWindow class - a wrapper for jQuery UI Dialog with a custom look and extra features
 *
 * Dependencies:
 *   - The whole thing relies on jQuery.  But most wikis should provide this by default.
 *   - QuickForm, SimpleWindow, Status, and the portlet stuff rely on the "morebits.css" file for their styling.
 *   - SimpleWindow relies on jquery UI Dialog (ResourceLoader module name 'jquery.ui.dialog').
 *   - QuickForm tooltips rely on Tipsy (ResourceLoader module name 'jquery.tipsy').
 *     For external installations, Tipsy is available at [http://onehackoranother.com/projects/jquery/tipsy].
 *
 * Most of the stuff here doesn't work on IE < 9.  It is your script's responsibility to enforce this.
 *
 * This library is maintained by the maintainers of Twinkle.
 * For queries, suggestions, help, etc., head to [[WT:TW]].
 * The latest development source is available at [https://github.com/azatoth/twinkle/blob/master/morebits.js].
 */

// Simple helper functions to see what groups a user might belong
function userIsInGroup( group ) {
	return mw.config.get( 'wgUserGroups' ).indexOf( group ) !== -1;
}
function userIsAnon() {
	return mw.config.get( 'wgUserGroups' ).length === 1;
}

/**
 * Add a portlet menu to one of the navigation areas on the page.
 * This is necessarily quite a hack since skins, navigation areas, and
 * portlet menu types all work slightly different.
 *
 * Available navigation areas depend on the script used.
 * Monobook:
 *  "column-one", outer div class "portlet", inner div class "pBody". Existing portlets: "p-cactions", "p-personal", "p-logo", "p-navigation", "p-search", "p-interaction", "p-tb", "p-coll-print_export"
 *  Special layout of p-cactions and p-personal through specialized styles.
 * Vector:
 *  "mw-panel", outer div class "portal", inner div class "body". Existing portlets/elements: "p-logo", "p-navigation", "p-interaction", "p-tb", "p-coll-print_export"
 *  "left-navigation", outer div class "vectorTabs" or "vectorMenu", inner div class "" or "menu". Existing portlets: "p-namespaces", "p-variants" (menu)
 *  "right-navigation", outer div class "vectorTabs" or "vectorMenu", inner div class "" or "menu". Existing portlets: "p-views", "p-cactions" (menu), "p-search"
 *  Special layout of p-personal portlet (part of "head") through specialized styles.
 * Modern:
 *  "mw_contentwrapper" (top nav), outer div class "portlet", inner div class "pBody". Existing portlets or elements: "p-cactions", "mw_content"
 *  "mw_portlets" (sidebar), outer div class "portlet", inner div class "pBody". Existing portlets: "p-navigation", "p-search", "p-interaction", "p-tb", "p-coll-print_export"
 *
 * NOTE: If anyone is brave enough to reuse this directly, please shoot
 * me a note. Otherwise I might change the signature down the line and
 * your script breaks. Amalthea.
 *
 * @param String navigation -- id of the target navigation area (skin dependant, on vector either of "left-navigation", "right-navigation", or "mw-panel")
 * @param String id -- id of the portlet menu to create, preferably start with "p-".
 * @param String text -- name of the portlet menu to create. Visibility depends on the class used.
 * @param String type -- type of portlet. Currently only used for the vector non-sidebar portlets, pass "menu" to make this portlet a drop down menu.
 * @param Node nextnodeid -- the id of the node before which the new item should be added, should be another item in the same list, or undefined to place it at the end.
 *
 * @return Node -- the DOM node of the new item (a DIV element) or null
 */
function twAddPortlet( navigation, id, text, type, nextnodeid )
{
	//sanity checks, and get required DOM nodes
	var root = document.getElementById( navigation );
	if ( !root ) {
		return null;
	}

	var item = document.getElementById( id );
	if (item) {
		if (item.parentNode && item.parentNode === root) {
			return item;
		}
		return null;
	}

	var nextnode;
	if (nextnodeid) {
		nextnode = document.getElementById(nextnodeid);
	}

	//verify/normalize input
	type = (skin === "vector" && type === "menu" && (navigation === "left-navigation" || navigation === "right-navigation")) ? "menu" : "";
	var outerDivClass;
	var innerDivClass;
	switch (skin)
	{
		case "vector":
			if (navigation !== "portal" && navigation !== "left-navigation" && navigation !== "right-navigation") {
				navigation = "mw-panel";
			}
			outerDivClass = (navigation === "mw-panel") ? "portal" : (type === "menu" ? "vectorMenu extraMenu" : "vectorTabs extraMenu");
			innerDivClass = (navigation === "mw-panel") ? 'body' : (type === 'menu' ? 'menu':'');
			break;
		case "modern":
			if (navigation !== "mw_portlets" && navigation !== "mw_contentwrapper") {
				navigation = "mw_portlets";
			}
			outerDivClass = "portlet";
			innerDivClass = "pBody";
			break;
		default:
			navigation = "column-one";
			outerDivClass = "portlet";
			innerDivClass = "pBody";
			break;
	}

	//Build the DOM elements.
	var outerDiv = document.createElement( 'div' );
	outerDiv.className = outerDivClass+" emptyPortlet";
	outerDiv.id = id;
	var nextnode;
	if ( nextnode && nextnode.parentNode === root ) root.insertBefore( outerDiv, nextnode );
	else root.appendChild( outerDiv );

	var h5 = document.createElement( 'h5' );
	if (type === 'menu')
	{
		var span = document.createElement( 'span' );
		span.appendChild( document.createTextNode( text ) );
		h5.appendChild( span );

		var a = document.createElement( 'a' );
		a.href = "#";
		var span = document.createElement( 'span' );
		span.appendChild( document.createTextNode( text ) );
		a.appendChild( span );
		h5.appendChild( a );
	}
	else h5.appendChild( document.createTextNode( text ) );
	outerDiv.appendChild( h5 );

	var innerDiv = document.createElement( 'div' ); //not strictly necessary with type vectorTabs, or other skins.
	innerDiv.className = innerDivClass;
	outerDiv.appendChild(innerDiv);

	var ul = document.createElement( 'ul' );
	innerDiv.appendChild( ul );

	return outerDiv;
}

//Build a portlet menu if it doesn't exist yet, and add the portlet link.
function twAddPortletLink( href, text, id, tooltip, accesskey, nextnode )
{
	if (twAddPortlet.portletArea) twAddPortlet(twAddPortlet.portletArea, twAddPortlet.portletId, twAddPortlet.portletName, twAddPortlet.portletType, twAddPortlet.portletNext);
	addPortletLink( twAddPortlet.portletId, href, text, id, tooltip, accesskey, nextnode );
}

var Cookies = {
	/*
	 * Creates an cookie with the name and value pair. expiry is optional or null and defaults
	 * to browser standard (in seconds), path is optional and defaults to "/"
	 * throws error if the cookie already exists.
	 */
	create: function( name, value, max_age, path ) {
		if( Cookies.exists( name ) ) {
			throw "cookie " + name + " already exists";
		}
		Cookies.set( name, value, max_age, path );
	},
	/*
	 * Sets an cookie with the name and value pair, overwrites any previous cookie of that name.
	 * expiry is optional or null and defaults to browser standard (in seconds),
	 * path is optional and defaults to /
	 */
	set: function( name, value, max_age, path ) {
		var cookie = name + "=" + encodeURIComponent( value );
		if( max_age ) {
			cookie += "; max-age=" + max_age;
		}
		cookie += "; path=" + path || "/";
		document.cookie = cookie;
	},
	/*
	 * Retuns the cookie with the name "name", return null if no cookie found.
	 */
	read: function( name ) {
		var cookies = document.cookie.split(";");
		for( var i = 0; i < cookies.length; ++i ) {
			var current = cookies[i];
			current = current.trim();
			if( current.indexOf( name + "=" ) === 0 ) {
				return decodeURIComponent( current.substring( name.length + 1 ) );
			}
		}
		return null;
	},
	/*
	 * Returns true if a cookie exists, false otherwise
	 */
	exists: function( name ) {
		var re = new RegExp( ";\\s*" + name + "=" );
		return re.test( document.cookie );
	},
	/*
	 * Deletes the cookie named "name"
	 */
	remove: function( name ) {
		Cookies.set( name, '', -1 );
	}
}

/**
 * Quickform is a class for creation of simple and standard forms without much 
 * specific coding.
 */

var QuickForm = function QuickForm( event, eventType ) {

	this.root = new QuickForm.element( { type: 'form', event: event, eventType:eventType } );
}

QuickForm.prototype.render = function QuickFormRender() {
	var ret = this.root.render();
	ret.names = {};
	return ret;

}
QuickForm.prototype.append = function QuickFormAppend( data ) {
	return this.root.append( data );
}

QuickForm.element = function QuickFormElement( data ) {
	this.data = data;
	this.childs = [];
	this.id = QuickForm.element.id++;
}

QuickForm.element.id = 0;

QuickForm.element.prototype.append = function QuickFormElementAppend( data ) {
	var child;
	if( data instanceof QuickForm.element ) {
		child = data;
	} else {
		child = new QuickForm.element( data );
	}
	this.childs.push( child );
	return child;
}

QuickForm.element.prototype.render = function QuickFormElementRender() {
	var currentNode = this.compute( this.data );

	for( var i = 0; i < this.childs.length; ++i ) {
		currentNode[1].appendChild( this.childs[i].render() );
	}
	return currentNode[0];
}

QuickForm.element.prototype.compute = function QuickFormElementCompute( data, in_id ) {
	var node;
	var childContainder = null;
	var label;
	var id = ( in_id ? in_id + '_' : '' ) + 'node_' + this.id;
	if( data.adminonly && !userIsInGroup( 'sysop' ) ) {
		// hell hack alpha
		data.type = 'hidden';
	}
	switch( data.type ) {
	case 'form':
		node = document.createElement( 'form' );
		node.setAttribute( 'name', 'id' );
		node.className = "quickform";
		node.setAttribute( 'action', 'javascript:void(0);');
		if( data.event ) {
			node.addEventListener( data.eventType || 'submit', data.event , false );
		}
		break;
	case 'select':
		node = document.createElement( 'div' );

		node.setAttribute( 'id', 'div_' + id );
		if( data.label ) {
			label = node.appendChild( document.createElement( 'label' ) );
			label.setAttribute( 'for', id );
			label.appendChild( document.createTextNode( data.label ) );
		}
		var select = node.appendChild( document.createElement( 'select' ) );
		if( data.event ) {
			select.addEventListener( 'change', data.event, false );
		}
		if( data.multiple ) {
			select.setAttribute( 'multiple', 'multiple' );
		}
		if( data.size ) {
			select.setAttribute( 'size', data.size );
		}
		select.setAttribute( 'name', data.name );

		if( data.list ) {
			for( var i = 0; i < data.list.length; ++i ) {

				var current = data.list[i];

				if( current.list ) {
					current.type = 'optgroup';
				} else {
					current.type = 'option';
				}

				var res = this.compute( current );
				select.appendChild( res[0] );
			}
		}
		childContainder = select;
		break;
	case 'option':
		node = document.createElement( 'option' );
		node.values = data.value;
		node.setAttribute( 'value', data.value );
		if( data.selected ) {
			node.setAttribute( 'selected', 'selected' );
		}
		if( data.disabled ) {
			node.setAttribute( 'disabled', 'disabled' );
		}
		node.setAttribute( 'label', data.label );
		node.appendChild( document.createTextNode( data.label ) );
		break;
	case 'optgroup':
		node = document.createElement( 'optgroup' );
		node.setAttribute( 'label', data.label );

		if( data.list ) {
			for( var i = 0; i < data.list.length; ++i ) {

				var current = data.list[i];

				current.type = 'option'; //must be options here

				var res = this.compute( current );
				node.appendChild( res[0] );
			}
		}
		break;
	case 'field':
		node = document.createElement( 'fieldset' );
		label = node.appendChild( document.createElement( 'legend' ) );
		label.appendChild( document.createTextNode( data.label ) );
		if( data.name ) {
			node.setAttribute( 'name', data.name );
		}
		break;
	case 'checkbox':
	case 'radio':
		node = document.createElement( 'div' );
		if( data.list ) {
			for( var i = 0; i < data.list.length; ++i ) {
				var cur_id = id + '_' + i;
				var current = data.list[i];
				var cur_node;
				if( current.type === 'header' ) {
					// inline hack
					cur_node = node.appendChild( document.createElement( 'h6' ) );
					cur_node.appendChild( document.createTextNode( current.label ) );
					if( current.tooltip ) {
						QuickForm.element.generateTooltip( cur_node , current );
					}
					continue;
				}
				cur_node = node.appendChild( document.createElement( 'div' ) );
				var input = cur_node.appendChild( document.createElement( 'input' ) );
				input.values = current.value;
				input.setAttribute( 'value', current.value );
				input.setAttribute( 'name', current.name || data.name );
				input.setAttribute( 'type', data.type );
				input.setAttribute( 'id', cur_id );


				if( current.checked ) {
					input.setAttribute( 'checked', 'checked' );
				}
				if( current.disabled ) {
					input.setAttribute( 'disabled', 'disabled' );
				}
				if( data.event ) {
					input.addEventListener( 'change', data.event, false );
				} else if ( current.event ) {
					input.addEventListener( 'change', current.event, true );
				}
				var label = cur_node.appendChild( document.createElement( 'label' ) );
				label.appendChild( document.createTextNode( current.label ) );
				label.setAttribute( 'for', cur_id );
				if( current.tooltip ) {
					QuickForm.element.generateTooltip( label, current );
				}
				if( current.subgroup ) {
					var tmpgroup = current.subgroup;
					if( ! tmpgroup.type ) {
						tmpgroup.type = data.type;
					}
					tmpgroup.name = (current.name || data.name) + '.' +  tmpgroup.name;

					var subgroup =this.compute( current.subgroup, cur_id )[0];
					subgroup.style.marginLeft = '3em';
					input.subgroup = subgroup;
					input.shown = false;

					var event = function(e) {
						if( e.target.checked ) {
							e.target.parentNode.appendChild( e.target.subgroup );
							if( e.target.type === 'radio' ) {
								var name = e.target.name;
								if( typeof( e.target.form.names[name] ) !== 'undefined' ) {
									e.target.form.names[name].parentNode.removeChild( e.target.form.names[name].subgroup );
								}
								e.target.form.names[name] = e.target;
							}
						} else {
							e.target.parentNode.removeChild( e.target.subgroup );
						}
					}
					input.addEventListener( 'change', event, true );
					if( current.checked ) {
						input.parentNode.appendChild( subgroup );
					}
				} else if( data.type === 'radio' ) {
					var event = function(e) {
						if( e.target.checked ) {
							var name = e.target.name;
							if( typeof( e.target.form.names[name] ) !== 'undefined' ) {
								e.target.form.names[name].parentNode.removeChild( e.target.form.names[name].subgroup );
							}
							delete e.target.form.names[name];
						} 
					}
					input.addEventListener( 'change', event, true );
				}
			}
		}
		break;
	case 'input':
		node = document.createElement( 'div' );

		if( data.label ) {
			label = node.appendChild( document.createElement( 'label' ) );
			label.appendChild( document.createTextNode( data.label ) );
			label.setAttribute( 'for', id );
		}

		var input = node.appendChild( document.createElement( 'input' ) );
		if( data.value ) {
			input.setAttribute( 'value', data.value );
		}
		input.setAttribute( 'name', data.name );
		input.setAttribute( 'type', 'text' );
		if( data.size ) {
			input.setAttribute( 'size', data.size );
		}
		if( data.disabled ) {
			input.setAttribute( 'disabled', 'disabled' );
		}
		if( data.readonly ) {
			input.setAttribute( 'readonly', 'readonly' );
		}
		if( data.maxlength ) {
			input.setAttribute( 'maxlength', data.maxlength );
		}
		if( data.event ) {
			input.addEventListener( 'keyup', data.event, false );
		}
		break;
	case 'dyninput':
		var min = data.min || 1;
		var max = data.max || Infinity;

		node = document.createElement( 'div' );

		label = node.appendChild( document.createElement( 'h5' ) );
		label.appendChild( document.createTextNode( data.label ) );

		var listNode = node.appendChild( document.createElement( 'div' ) );

		var more = this.compute( {
				type: 'button',
				label: 'more',
				disabled: min >= max,
				event: function(e) {
					var area = e.target.area;
					var new_node =  new QuickForm.element( e.target.sublist );
					e.target.area.appendChild( new_node.render() );

					if( ++e.target.counter >= e.target.max ) {
						e.target.setAttribute( 'disabled', 'disabled' );
					}
					e.stopPropagation();
				}
			} );

		node.appendChild( more[0] );
		var moreButton = more[1];


		var sublist = {
			type: '_dyninput_element',
			label: data.sublabel || data.label,
			name: data.name,
			value: data.value,
			size: data.size,
			remove: false,
			maxlength: data.maxlength,
			event: data.event
		}


		for( var i = 0; i < min; ++i ) {
			var elem = new QuickForm.element( sublist );
			listNode.appendChild( elem.render() );
		}
		sublist.remove = true;
		sublist.morebutton = moreButton;
		sublist.listnode = listNode;

		moreButton.sublist = sublist;
		moreButton.area = listNode;
		moreButton.max = max - min;
		moreButton.counter = 0;
		break;
	case '_dyninput_element': // Private, similar to normal input
		node = document.createElement( 'div' );

		if( data.label ) {
			label = node.appendChild( document.createElement( 'label' ) );
			label.appendChild( document.createTextNode( data.label ) );
			label.setAttribute( 'for', id );
		}

		var input = node.appendChild( document.createElement( 'input' ) );
		if( data.value ) {
			input.setAttribute( 'value', data.value );
		}
		input.setAttribute( 'name', data.name );
		input.setAttribute( 'type', 'text' );
		if( data.size ) {
			input.setAttribute( 'size', data.size );
		}
		if( data.maxlength ) {
			input.setAttribute( 'maxlength', data.maxlength );
		}
		if( data.event ) {
			input.addEventListener( 'keyup', data.event, false );
		}
		if( data.remove ) {
			var remove = this.compute( {
					type: 'button',
					label: 'remove',
					event: function(e) {
						var list = e.target.listnode;
						var node = e.target.inputnode;
						var more = e.target.morebutton;

						list.removeChild( node );
						--more.counter;
						more.removeAttribute( 'disabled' );
						e.stopPropagation();
					}
				} );
			node.appendChild( remove[0] );
			var removeButton = remove[1];
			removeButton.inputnode = node;
			removeButton.listnode = data.listnode;
			removeButton.morebutton = data.morebutton;
		}
		break;
	case 'hidden':
		var node = document.createElement( 'input' );
		node.setAttribute( 'type', 'hidden' );
		node.values = data.value;
		node.setAttribute( 'value', data.value );
		node.setAttribute( 'name', data.name );
		break;
	case 'header':
		node = document.createElement( 'h5' );
		node.appendChild( document.createTextNode( data.label ) );
		break;
	case 'div':
		node = document.createElement( 'div' );
		if (data.name) {
			node.setAttribute( 'name', data.name );
		}
		if (data.label) {
			if ( !( data.label instanceof Array ) ) {
				data.label = [ data.label ];
			}
			var result = document.createElement( 'span' );
			result.className = 'quickformDescription';
			for( var i = 0; i < data.label.length; ++i ) {
				if( typeof(data.label[i]) === 'string' ) {
					result.appendChild( document.createTextNode( data.label[i] ) );
				} else if( data.label[i] instanceof Element ) {
					result.appendChild( data.label[i] );
				}
			}
			node.appendChild( result );
		}
		break;
	case 'submit':
		node = document.createElement( 'span' );
		childContainder = node.appendChild(document.createElement( 'input' ));
		childContainder.setAttribute( 'type', 'submit' );
		if( data.label ) {
			childContainder.setAttribute( 'value', data.label );
		}
		childContainder.setAttribute( 'name', data.name || 'submit' );
		if( data.disabled ) {
			childContainder.setAttribute( 'disabled', 'disabled' );
		}
		break;
	case 'button':
		node = document.createElement( 'span' );
		childContainder = node.appendChild(document.createElement( 'input' ));
		childContainder.setAttribute( 'type', 'button' );
		if( data.label ) {
			childContainder.setAttribute( 'value', data.label );
		}
		childContainder.setAttribute( 'name', data.name );
		if( data.disabled ) {
			childContainder.setAttribute( 'disabled', 'disabled' );
		}
		if( data.event ) {
			childContainder.addEventListener( 'click', data.event, false );
		}
		break;
	case 'textarea':
		node = document.createElement( 'div' );
		if( data.label ) {
			label = node.appendChild( document.createElement( 'h5' ) );
			label.appendChild( document.createTextNode( data.label ) );
			label.setAttribute( 'for', id );
		}
		var textarea = node.appendChild( document.createElement( 'textarea' ) );
		textarea.setAttribute( 'name', data.name );
		if( data.cols ) {
			textarea.setAttribute( 'cols', data.cols );
		}
		if( data.rows ) {
			textarea.setAttribute( 'rows', data.rows );
		}
		if( data.disabled ) {
			textarea.setAttribute( 'disabled', 'disabled' );
		}
		if( data.readonly ) {
			textarea.setAttribute( 'readonly', 'readonly' );
		}
		if( data.value ) {
			textarea.value = data.value;
		}
		break;

	}

	if( !childContainder ) {
		childContainder = node;
	} 
	if( data.tooltip ) {
		QuickForm.element.generateTooltip( label || node , data );
	}

	if( data.extra ) {
		childContainder.extra = data.extra;
	}
	childContainder.setAttribute( 'id', data.id || id );

	return [ node, childContainder ];
}

QuickForm.element.generateTooltip = function QuickFormElementGenerateTooltip( node, data ) {
	var obj = $('<span/>', {
			'class': 'ui-icon ui-icon-lightbulb ui-icon-inline morebits-tooltip'
		})
		.appendTo(node)
		.tipsy({
			'fallback': data.tooltip,
			'fade': true,
			'gravity': $.fn.tipsy.autoWE,
			'html': true,
			'delayOut': 500,
		});
}

/*
 * returns an array containing the values of elements with the given name, that has it's
 * checked property set to true. (i.e. a checkbox or a radiobutton is checked), or select options
 * that have selected set to true. (don't try to mix selects with radio/checkboxes, please)
 * Type is optional and can specify if either radio or checkbox (for the event
 * that both checkboxes and radiobuttons have the same name.
 */
HTMLFormElement.prototype.getChecked = function( name, type ) {
	var elements = this.elements[name];
	if( !elements ) { 
		// if the element doesn't exists, return null.
		return null;
	}
	var return_array = [];
	if( elements instanceof HTMLSelectElement ) {
		var options = elements.options;
		for( var i = 0; i < options.length; ++i ) {
			if( options[i].selected ) {
				if( options[i].values ) {
					return_array.push( options[i].values );
				} else {
					return_array.push( options[i].value );
				}

			}
		}
	} else if( elements instanceof HTMLInputElement ) {
		if( type && elements.type !== type ) {
			return [];
		} else if( elements.checked ) {
			return [ elements.value ];
		}
	} else {
		for( var i = 0; i < elements.length; ++i ) {
			if( elements[i].checked ) {
				if( type && elements[i].type !== type ) {
					continue;
				}
				if( elements[i].values ) {
					return_array.push( elements[i].values );
				} else {
					return_array.push( elements[i].value );
				}
			}
		}
	}
	return return_array;
}

/*
 * returns an array containing the values of elements with the given name, that has non-empty strings
 * type is "text" or given.
 */
HTMLFormElement.prototype.getTexts = function( name, type ) {
	type = type || 'text';
	var elements = this.elements[name];
	if( !elements ) { 
		// if the element doesn't exists, return null.
		return null;
	}
	var return_array = [];
	for( var i = 0; i < elements.length; ++i ) {
		if( elements[i].value != '' ) {
			return_array.push( elements[i].value );
		}
	}
	return return_array;
}
/**
* 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;

}

// Sprintf implementation based on perl similar
function sprintf() {
	if( !arguments.length ) {
		throw "Not enough arguments for sprintf";
	}
	var result = "";
	var format = arguments[0];

	var index = 1;
	var current_index = 1;
	var flags = {};
	var in_operator = false;
	var relative = false;
	var precision = false;
	var fixed = false;
	var vector = false;
	var vector_delimiter = '.';


	for( var i = 0; i < format.length; ++i ) {
		var current_char = format.charAt(i);
		if( in_operator ) {
			switch( current_char ) {
			case 'i':
				current_char = 'd';
				break;
			case 'F':
				current_char = 'f';
				break;
			case '%':
			case 'c':
			case 's':
			case 'd':
			case 'u':
			case 'o':
			case 'x':
			case 'e':
			case 'f':
			case 'g':
			case 'X':
			case 'E':
			case 'G':
			case 'b':
				var value = arguments[current_index];
				if( vector ) {
					result += value.toString().split('').map( function( value ) {
							return sprintf.format( current_char, value.charCodeAt(), flags );
						}).join( vector_delimiter );
				} else {
					result += sprintf.format( current_char, value, flags );
				}
				if( !fixed ) {
					++index;
				}
				current_index = index;
				flags = {};
				relative = false;
				in_operator = false;
				precision = false;
				fixed = false;
				vector = false;
				vector_delimiter = '.';
				break;
			case 'v':
				vector = true;
				break;
			case ' ':
			case '0':
			case '-':
			case '+':
			case '#':
				flags[current_char] = true;
				break;
			case '*':
				relative = true;
				break;
			case '.':
				precision = true;
				break;
			}
			if( /\d/.test( current_char ) ) {
				var num = parseInt( format.substr( i ) );
				var len = num.toString().length;
				i += len - 1;
				var next = format.charAt( i  + 1 );
				if( next === '$' ) {
					if( num <= 0 || num >= arguments.length ) {
						throw "out of bound";
					}
					if( relative ) {
						if( precision ) {
							flags.precision = arguments[num];
							precision = false;
						} else if( format.charAt( i + 2 ) === 'v' ) {
							vector_delimiter = arguments[num];
						}else {
							flags.width = arguments[num];
						}
						relative = false;
					} else {
						fixed = true;
						current_index = num;
					}
					++i;
				} else if( precision ) {
					flags.precision = num;
					precision = false;
				} else {
					flags.width = num;
				}
			} else if ( relative && !/\d/.test( format.charAt( i + 1 ) ) ) {
				if( precision ) {
					flags.precision = arguments[current_index];
					precision = false;
				} else if( format.charAt( i + 1 ) === 'v' ) {
					vector_delimiter = arguments[current_index];
				} else {
					flags.width = arguments[current_index];
				}
				++index;
				if( !fixed ) {
					current_index++;
				}
				relative = false;
			}
		} else {
			if( current_char === '%' ) {
				in_operator = true;
				continue;
			} else {
				result += current_char;
				continue;
			}
		}
	}
	return result;
}

sprintf.format = function sprintfFormat( type, value, flags ) {

	// Similar to how perl printf works
	if( !value ) {
		if( type === 's' ) {
			return '';
		} else {
			return '0';
		}
	}

	var result;
	var prefix = '';
	var fill = '';
	var fillchar = ' ';
	var digits;
	switch( type ) {
	case '%':
		result = '%';
		break;
	case 'c':
		result = String.fromCharCode( parseInt( value ) );
		break;
	case 's':
		result = value.toString();
		break;
	case 'd':
		result = parseInt( value ).toString();
		break;
	case 'u':
		result = Math.abs( parseInt( value ) ).toString(); // it's not correct, but JS lacks unsigned ints
		break;
	case 'o':
		result = Math.abs( parseInt( value ) ).toString(8);
		break;
	case 'x':
		result = Math.abs( parseInt( value ) ).toString(16);
		break;
	case 'b':
		result = Math.abs( parseInt( value ) ).toString(2);
		break;
	case 'e':
		digits = flags.precision ? flags.precision : 6;
		result = (new Number( value ) ).toExponential( digits ).toString();
		break;
	case 'f':
		digits = flags.precision ? flags.precision : 6;
		result = (new Number( value ) ).toFixed( digits ).toString();
		break;
	case 'g':
		digits = flags.precision ? flags.precision : 6;
		result = (new Number( value ) ).toPrecision( digits ).toString();
		break;
	case 'X':
		result = Math.abs( parseInt( value ) ).toString(16).toUpperCase();
		break;
	case 'E':
		digits = flags.precision ? flags.precision : 6;
		result = (new Number( value ) ).toExponential( digits ).toString().toUpperCase();
		break;
	case 'G':
		var digits = flags.precision ? flags.precision : 6;
		result = (new Number( value ) ).toPrecision( digits ).toString().toUpperCase();
		break;
	}

	if(flags['+'] && parseFloat( value ) > 0 && ['d','e','f','g','E','G'].indexOf(type) !== -1 ) {
		prefix = '+';
	}

	if(flags[' '] && parseFloat( value ) > 0 && ['d','e','f','g','E','G'].indexOf(type) !== -1 ) {
		prefix = ' ';
	}

	if( flags['#'] && parseInt( value ) !== 0 ) {
		switch(type) {
		case 'o':
			prefix = '0';
			break;
		case 'x':
		case 'X':
			prefix = '0x';
			break;
		case 'b':
			prefix = '0b';
			break;
		}
	}

	if( flags['0'] && !flags['-'] ) {
		fillchar = '0';
	}

	if( flags.width && flags.width > ( result.length + prefix.length ) ) {
		var tofill = flags.width - result.length - prefix.length;
		for( var i = 0; i < tofill; ++i ) {
			fill += fillchar;
		}
	}

	if( flags['-'] && !flags['0'] ) {
		result += fill;
	} else {
		result = fill + result;
	}

	return prefix + result;
}

function Bytes( value ) {
	if( typeof(value) === 'string' ) {
		var res = /(\d+) ?(\w?)(i?)B?/.exec( value );
		var number = res[1];
		var mag = res[2];
		var si = res[3];

		if( ! number ) {
			this.number = 0;
			return;
		}

		if( !si ) {
			this.value = number * Math.pow( 10, Bytes.magnitudes[mag] * 3 );
		} else {
			this.value = number * Math.pow( 2, Bytes.magnitudes[mag] * 10 );
		}
	} else {
		this.value = value;
	}
}

Bytes.magnitudes = {
	'': 0,
	'K': 1,
	'M': 2,
	'G': 3,
	'T': 4,
	'P': 5,
	'E': 6,
	'Z': 7,
	'Y': 8
}
Bytes.rmagnitudes = {
	0: '',
	1: 'K',
	2: 'M',
	3: 'G',
	4: 'T',
	5: 'P',
	6: 'E',
	7: 'Z',
	8: 'Y'
}

Bytes.prototype.valueOf = function() {
	return this.value;
}

Bytes.prototype.toString = function( magnitude ) {
	var tmp = this.value;
	if( magnitude ) {
		var si = /i/.test(magnitude);
		var mag = magnitude.replace( /.*?(\w)i?B?.*/g, '$1' );
		if( si ) {
			tmp /= Math.pow( 2, Bytes.magnitudes[mag] * 10 );
		} else {
			tmp /= Math.pow( 10, Bytes.magnitudes[mag] * 3 );
		}
		if( parseInt( tmp ) !== tmp ) {
			tmp = (new Number( tmp ) ).toPrecision( 4 );
		}
		return tmp + ' ' + mag + (si?'i':'') +  'B';
	} else {
		// si per default
		var current = 0;
		while( tmp >= 1024 ) {
			tmp /= 1024;
			++current;
		}
		tmp = this.value / Math.pow( 2, current * 10 );
		if( parseInt( tmp ) !== tmp ) {
			tmp = (new Number( tmp ) ).toPrecision( 4 );
		}
		return tmp + ' ' + Bytes.rmagnitudes[current] + ( current > 0 ? 'iB' : 'B' );
	}

}
String.prototype.ltrim = function stringPrototypeLtrim( chars ) {
	chars = chars || "\\s*";
	return this.replace( new RegExp("^[" + chars + "]+", "g"), "" );
}

String.prototype.rtrim = function stringPrototypeRtrim( chars ) {
	chars = chars || "\\s*";
	return this.replace( new RegExp("[" + chars + "]+$", "g"), "" );
}
String.prototype.trim = function stringPrototypeTrim( chars ) {
	return this.rtrim(chars).ltrim(chars);
}

String.prototype.splitWeightedByKeys = function stringPrototypeSplitWeightedByKeys( start, end, skip ) {
	if( start.length !== end.length ) {
		throw 'start marker and end marker must be of the same length';
	}
	var level = 0;
	var initial = null;
	var result = [];
	if( !( skip instanceof Array ) ) {
		if( typeof( skip ) === 'undefined' ) {
			skip = [];
		} else if( typeof( skip ) === 'string' ) {
			skip = [ skip ];
		} else {
			throw "non-applicable skip parameter";
		}
	}
	for( var i  = 0; i < this.length; ++i ) {
		for( var j = 0; j < skip.length; ++j ) {
			if( this.substr( i, skip[j].length ) === skip[j] ) {
				i += skip[j].length - 1;
				continue;
			}
		}
		if( this.substr( i, start.length ) === start ) {
			if( initial === null ) {
				initial = i;
			}
			++level;
			i += start.length - 1;
		} else if( this.substr( i, end.length ) === end ) {
			--level;
			i += end.length - 1;
		}
		if( !level && initial ) {
			result.push( this.substring( initial, i + 1 ) );
			initial = null;
		}
	}

	return result;
}



// Helper functions to change case of a string
String.prototype.toUpperCaseFirstChar = function() {
	return this.substr( 0, 1 ).toUpperCase() + this.substr( 1 );
}

String.prototype.toLowerCaseFirstChar = function() {
	return this.substr( 0, 1 ).toLowerCase() + this.substr( 1 );
}

String.prototype.toUpperCaseEachWord = function( delim ) {
	delim = delim ? delim : ' ';
	return this.split( delim ).map( function(v) { return v.toUpperCaseFirstChar() } ).join( delim );
}

String.prototype.toLowerCaseEachWord = function( delim ) {
	delim = delim ? delim : ' ';
	return this.split( delim ).map( function(v) { return v.toLowerCaseFirstChar() } ).join( delim );
}

Array.prototype.uniq = function arrayPrototypeUniq() {
	var result = [];
	for( var i = 0; i < this.length; ++i ) {
		var current = this[i];
		if( result.indexOf( current ) === -1 ) {
			result.push( current );
		}
	}
	return result;
}

Array.prototype.dups = function arrayPrototypeUniq() {
	var uniques = [];
	var result = [];
	for( var i = 0; i < this.length; ++i ) {
		var current = this[i];
		if( uniques.indexOf( current ) === -1 ) {
			uniques.push( current );
		} else {
			result.push( current );
		}
	}
	return result;
}

Array.prototype.chunk = function arrayChunk( size ) {
	if( typeof( size ) !== 'number' || size <= 0 ) { // pretty impossible to do anything :)
		return [ this ]; // we return an array consisting of this array.
	}
	var result = [];
	var current;
	for(var i = 0; i < this.length; ++i ) {
		if( i % size === 0 ) { // when 'i' is 0, this is always true, so we start by creating one.
			current = [];
			result.push( current );
		}
		current.push( this[i] );
	}
	return result;
}

function Unbinder( string ) {
	if( typeof( string ) !== 'string' ) {
		throw "not a string";
	}
	this.content = string;
	this.counter = 0;
	this.history = {};
	this.prefix = '%UNIQ::' + Math.random() + '::';
	this.postfix = '::UNIQ%';
}

Unbinder.prototype = {
	unbind: function UnbinderUnbind( prefix, postfix ) {
		var re = new RegExp( prefix + '(.*?)' + postfix, 'g' );
		this.content = this.content.replace( re, Unbinder.getCallback( this ) );
	},
	rebind: function UnbinderRebind() {
		var content = this.content;
		content.self = this;
		for( var current in this.history )
			if( this.history.hasOwnProperty( current ) )
				content = content.replace( current, this.history[current] );
		return content;
	},
	prefix: null, // %UNIQ::0.5955981644938324::
	postfix: null, // ::UNIQ%
	content: null, // string
	counter: null, // 0++
	history: null // {}
};

Unbinder.getCallback = function UnbinderGetCallback(self) {
	return function UnbinderCallback( match , a , b ) {
		var current = self.prefix + self.counter + self.postfix;
		self.history[current] = match;
		++self.counter;
		return current;
	};
};

function clone( obj, deep ) {
	var objectClone = new obj.constructor();
	for ( var property in obj )
		if ( !deep ) {
			objectClone[property] = obj[property];
		} else if ( typeof obj[property] === 'object' ) {
			objectClone[property] = clone( obj[property], deep );
		} else {
			objectClone[property] = obj[property];
		}
	return objectClone;
}

function ln( ns, title ) {
	var ns2ln = {
		'0':   'la',
		'1':   'lat',
		'2':   'lu',
		'3':   'lut',
		'4':   'lw',
		'5':   'lwt',
		'6':   'li',
		'7':   'lit',
		'8':   'lm',
		'9':   'lmt',
		'10':  'lt',
		'11':  'ltt',
		'12':  'lh',
		'13':  'lht',
		'14':  'lc',
		'15':  'lct',
		'100': 'lp',
		'101': 'lpt',
		'108': 'lb',
		'109': 'lbt'
	};
	return "\{\{" + ns2ln[ns] + "|" + title + "\}\}";
}

var Namespace = {
	MAIN:           0,
	TALK:           1,
	USER:           2,
	USER_TALK:      3,
	PROJECT:        4,
	PROJECT_TALK:   5,
	IMAGE:          6,
	IMAGE_TALK:     7,
	FILE:           6,
	FILE_TALK:      7,
	MEDIAWIKI:      8,
	MEDIAWIKI_TALK: 9,
	TEMPLATE:       10,
	TEMPLATE_TALK:  11,
	HELP:           12,
	HELP_TALK:      13,
	CATEGORY:       14,
	CATEGORY_TALK:  15,
	PORTAL:         100,
	PORTAL_TALK:    101,
	BOOK:           108,
	BOOK_TALK:      109,
	MEDIA:          -2,
	SPECIAL:        -1,

	"":             0,
	WIKIPEDIA:      4,
	WIKIPEDIA_TALK: 5,
	WP:             4,
	WT:             5
};

/**
* Helper functions to get the month as a string instead of a number
*/

Date.monthNames = [
	'January',
	'February',
	'March',
	'April',
	'May',
	'June',
	'July',
	'August',
	'September',
	'October',
	'November',
	'December'
];
Date.monthNamesAbbrev = [
	'Jan',
	'Feb',
	'Mar',
	'Apr',
	'May',
	'Jun',
	'Jul',
	'Aug',
	'Sep',
	'Oct',
	'Nov',
	'Dec'
];

Date.prototype.getMonthName = function() {
	return Date.monthNames[ this.getMonth() ];
}

Date.prototype.getMonthNameAbbrev = function() {
	return Date.monthNamesAbbrev[ this.getMonth() ];
}
Date.prototype.getUTCMonthName = function() {
	return Date.monthNames[ this.getUTCMonth() ];
}

Date.prototype.getUTCMonthNameAbbrev = function() {
	return Date.monthNamesAbbrev[ this.getUTCMonth() ];
}

// Accessor functions for wikiediting and api-access
var Wikipedia = {};

Wikipedia.namespaces = {
	'-2':  'Media',
	'-1':  'Special',
	'0':   '',
	'1':   'Talk',
	'2':   'User',
	'3':   'User talk',
	'4':   'Project',
	'5':   'Project talk',
	'6':   'File',
	'7':   'File talk',
	'8':   'MediaWiki',
	'9':   'MediaWiki talk',
	'10':  'Template',
	'11':  'Template talk',
	'12':  'Help',
	'13':  'Help talk',
	'14':  'Category',
	'15':  'Category talk',
	'100': 'Portal',
	'101': 'Portal talk',
	'108': 'Book',
	'109': 'Book talk'
};

Wikipedia.namespacesFriendly = {
	'0':   '(Article)',
	'1':   'Talk',
	'2':   'User',
	'3':   'User talk',
	'4':   'Wikipedia',
	'5':   'Wikipedia talk',
	'6':   'File',
	'7':   'File talk',
	'8':   'MediaWiki',
	'9':   'MediaWiki talk',
	'10':  'Template',
	'11':  'Template talk',
	'12':  'Help',
	'13':  'Help talk',
	'14':  'Category',
	'15':  'Category talk',
	'100': 'Portal',
	'101': 'Portal talk',
	'108': 'Book',
	'109': 'Book talk'
};

// we dump all XHR here so they won't loose props
Wikipedia.dump = [];

Wikipedia.numberOfActionsLeft = 0;
Wikipedia.nbrOfCheckpointsLeft = 0;

/* Use of Wikipedia.actionCompleted():
 *    Every call to Wikipedia.api.post() results in the dispatch of
 *    an asynchronous callback. Each callback can in turn
 *    make an additional call to Wikipedia.api.post() to continue a 
 *    processing sequence. At the conclusion of the final callback
 *    of a processing sequence, it is not possible to simply return to the
 *    original caller because there is no call stack leading back to
 *    the original context. Instead, Wikipedia.actionCompleted.event() is
 *    called to display the result to the user and to perform an optional
 *    page redirect.
 *
 *    The determination of when to call Wikipedia.actionCompleted.event()
 *    is managed through the globals Wikipedia.numberOfActionsLeft and
 *    Wikipedia.nbrOfCheckpointsLeft. Wikipedia.numberOfActionsLeft is
 *    incremented at the start of every Wikipedia.api call and decremented 
 *    after the completion of a callback function. If a callback function
 *    does not create a new Wikipedia.api object before exiting, it is the
 *    final step in the processing chain and Wikipedia.actionCompleted.event()
 *    will then be called.
 *
 *    Optionally, callers may use Wikipedia.addCheckpoint() to indicate that
 *    processing is not complete upon the conclusion of the final callback function.
 *    This is used for batch operations. The end of a batch is signaled by calling
 *    Wikipedia.removeCheckpoint(). 
 */

Wikipedia.actionCompleted = function( self ) {
	if( --Wikipedia.numberOfActionsLeft <= 0 && Wikipedia.nbrOfCheckpointsLeft <= 0 ) {
		Wikipedia.actionCompleted.event( self );
	}
}

// Change per action wanted
Wikipedia.actionCompleted.event = function() {
	new Status( Wikipedia.actionCompleted.notice, Wikipedia.actionCompleted.postfix, 'info' );
	if( Wikipedia.actionCompleted.redirect ) {
		// if it isn't an url, make it an relative to self (probably this is the case)
		if( !/^\w+\:\/\//.test( Wikipedia.actionCompleted.redirect ) ) {
			Wikipedia.actionCompleted.redirect = mw.config.get( 'wgServer' ) + mw.config.get( 'wgArticlePath' ).replace( '$1', encodeURIComponent( Wikipedia.actionCompleted.redirect ).replace( /\%2F/g, '/' ) );
			if( Wikipedia.actionCompleted.followRedirect === false ) Wikipedia.actionCompleted.redirect += "?redirect=no";
		}
		window.setTimeout( function() { window.location = Wikipedia.actionCompleted.redirect } , Wikipedia.actionCompleted.timeOut );
	}
}
var wpActionCompletedTimeOut = typeof(wpActionCompletedTimeOut) === 'undefined'  ? 5000 : wpActionCompletedTimeOut;
var wpMaxLag = typeof(wpMaxLag) === 'undefined' ? 10 : wpMaxLag; // Maximum lag allowed, 5-10 is a good value, the higher value, the more agressive.

Wikipedia.editCount = 10;
Wikipedia.actionCompleted.timeOut = wpActionCompletedTimeOut;
Wikipedia.actionCompleted.redirect = null;
Wikipedia.actionCompleted.notice = 'Action';
Wikipedia.actionCompleted.postfix = 'completed';

Wikipedia.addCheckpoint = function() {
	++Wikipedia.nbrOfCheckpointsLeft;
}

Wikipedia.removeCheckpoint = function() {
	if( --Wikipedia.nbrOfCheckpointsLeft <= 0 && Wikipedia.numberOfActionsLeft <= 0 ) {
		Wikipedia.actionCompleted.event();
	}
}

/*
 currentAction: text, the current action (required)
 query: Object, the query (required)
 onSuccess: function, the function to call when page gotten
 onError: function, the function to call if an error occurs
 */
Wikipedia.api = function( currentAction, query, onSuccess, statusElement, onError ) {
	this.currentAction = currentAction;
	this.query = query;
	this.query.format = 'xml';
	this.onSuccess = onSuccess;
	this.onError = onError;
	if( statusElement ) {
		this.statelem = statusElement;
		this.statelem.status( currentAction );
	} else {
		this.statelem = new Status( currentAction );
	}
}
Wikipedia.api.prototype = {
	currentAction: '',
	onSuccess: null,
	onError: null,
	parent: window,  // use global context if there is no parent object
	query: null,
	responseXML: null,
	setParent: function(parent) { this.parent = parent; },  // keep track of parent object for callbacks
	statelem: null,  // this non-standard name kept for backwards compatibility
	statusText: null, // result received from the API, normally "success" or "error"
	errorCode: null, // short text error code, if any, as documented in the MediaWiki API
	errorText: null, // full error description, if any

	// post(): carries out the request
	// do not specify a parameter unless you really really want to give jQuery some extra parameters
	post: function( callerAjaxParameters ) {

		++Wikipedia.numberOfActionsLeft;

		var ajaxparams = $.extend( {}, {
			context: this,
			type: 'POST',
			url: mw.config.get('wgServer') + mw.config.get('wgScriptPath') + '/api.php',
			data: QueryString.create(this.query),
			datatype: 'xml',

			success: function(xml, statusText, jqXHR) {
				this.statusText = statusText;
				this.responseXML = xml;
				this.errorCode = $(xml).find('error').attr('code');
				this.errorText = $(xml).find('error').attr('info');

				if (typeof(this.errorCode) === "string") {

					// the API didn't like what we told it, e.g., bad edit token or an error creating a page
					this.returnError();
					return;
				}

				// invoke success callback if one was supplied
				if (this.onSuccess) {

					// set the callback context to this.parent for new code and supply the API object
					// as the first argument to the callback (for legacy code)
					this.onSuccess.call( this.parent, this );
				} else {
					this.statelem.info("done");
				}

				Wikipedia.actionCompleted();
			},

			// only network and server errors reach here – complaints from the API itself are caught in success()
			error: function(jqXHR, statusText, errorThrown) {
				this.statusText = statusText;
				this.errorThrown = errorThrown; // frequently undefined
				this.errorText = statusText + ' "' + jqXHR.statusText + '" occurred while contacting the API.';
				this.returnError();
			}

		}, callerAjaxParameters );

		return $.ajax( ajaxparams );  // the return value should be ignored, unless using callerAjaxParameters with |async: false|
	},

	returnError: function() {

		// invoke failure callback if one was supplied
		if (this.onError) {

			// set the callback context to this.parent for new code and supply the API object
			// as the first argument to the callback for legacy code
			this.onError.call( this.parent, this );
		} else {
			this.statelem.error( this.errorText );
		}
		// don't complete the action so that the error remains displayed
	},

	getStatusElement: function() {
		return this.statelem;
	},

	getErrorCode: function() {
		return this.errorCode;
	},

	getErrorText: function() {
		return this.errorText;
	},

	getXML: function() {
		return this.responseXML;
	}
}

/** 
 * Class: Wikipedia.page
 * Uses the MediaWiki API to load a page and optionally edit it.
 *
 * Callers are not permitted to directly access the properties of this class!
 * All property access is through the appropriate getProperty() or setProperty() method.
 *
 * Callers should set Wikipedia.actionCompleted.notice and Wikipedia.actionCompleted.redirect
 * before the first call to Wikipedia.page.load().
 *
 * Each of the callback functions takes one parameter, which is a
 * reference to the Wikipedia.page object that registered the callback.
 * Callback functions may invoke any Wikipedia.page prototype method using this reference.
 *
 * Constructor: Wikipedia.page(pageName, currentAction)
 *    pageName - the name of the page, prefixed by the namespace (if any)
 *               (for the current page, use mw.config.get('wgPageName'))
 *    currentAction - a string describing the action about to be undertaken (optional)
 *
 * load(onSuccess, onFailure): Loads the text for the page
 *    onSuccess - callback function which is called when the load has succeeded
 *    onFailure - callback function which is called when the load fails (optional)
 *                XXX onFailure for load() is not yet implemented – do we need it? -- UncleDouggie
 *                    probably not -- TTO
 *
 * save(onSuccess, onFailure): Saves the text for the page. Must be preceded by calling load().
 *    onSuccess - callback function which is called when the save has succeeded (optional)
 *    onFailure - callback function which is called when the save fails (optional)
 *    Warning: Calling save() can result in additional calls to the previous load() callbacks to
 *             recover from edit conflicts! 
 *             In this case, callers must make the same edit to the new pageText and reinvoke save(). 
 *             This behavior can be disabled with setMaxConflictRetries(0).
 *
 * append(onSuccess, onFailure): Adds the text provided via setAppendText() to the end of the page.
 *                               Does not require calling load() first.
 *    onSuccess - callback function which is called when the method has succeeded (optional)
 *    onFailure - callback function which is called when the method fails (optional)
 *
 * prepend(onSuccess, onFailure): Adds the text provided via setPrependText() to the start of the page.
 *                                Does not require calling load() first.
 *    onSuccess - callback function which is called when the method has succeeded (optional)
 *    onFailure - callback function which is called when the method fails (optional)
 *
 * getPageName(): returns a string containing the name of the loaded page, including the namespace
 *
 * getPageText(): returns a string containing the text of the page after a successful load()
 *
 * setPageText(pageText) 
 *    pageText - string containing the updated page text that will be saved when save() is called
 *
 * setAppendText(appendText) 
 *    appendText - string containing the text that will be appended to the page when append() is called
 *
 * setPrependText(prependText) 
 *    prependText - string containing the text that will be prepended to the page when prepend() is called
 *
 * setEditSummary(summary)
 *    summary - string containing the text of the edit summary that will be used when save() is called
 *
 * setMinorEdit(minorEdit) 
 *    minorEdit is a boolean value:
 *       true  - When save is called, the resulting edit will be marked as "minor".
 *       false - When save is called, the resulting edit will not be marked as "minor". (default)
 *
 * setPageSection(pageSection)
 *    pageSection - integer specifying the section number to load or save. The default is |null|, which means
 *                  that the entire page will be retrieved.
 *
 * setMaxConflictRetries(maxRetries)
 *    maxRetries - number of retries for save errors involving an edit conflict or loss of edit token
 *    default: 2
 *
 * setMaxRetries(maxRetries)
 *    maxRetries - number of retries for save errors not involving an edit conflict or loss of edit token
 *    default: 2
 *
 * setCallbackParameters(callbackParameters)
 *    callbackParameters - an object for use in a callback function
 *
 * getCallbackParameters(): returns the object previous set by setCallbackParameters()
 *
 *    Callback notes: callbackParameters is for use by the caller only. The parameters
 *                    allow a caller to pass the proper context into its callback function.
 *                    Callers must ensure that any changes to the callbackParameters object
 *                    within a load() callback still permit a proper re-entry into the
 *                    load() callback if an edit conflict is detected upon calling save().
 *
 * getStatusElement(): returns the Status element created by the constructor
 *
 * setFollowRedirect(followRedirect)
 *    followRedirect is a boolean value:
 *       true  - a maximum of one redirect will be followed.
 *               In the event of a redirect, a message is displayed to the user and 
 *               the redirect target can be retrieved with getPageName().
 *       false - the requested pageName will be used without regard to any redirect. (default)
 *
 * setWatchlist(watchlistOption)
 *    watchlistOption is a boolean value:
 *       true  - page will be added to the user's watchlist when save() is called
 *       false - watchlist status of the page will not be changed (default)
 *
 * setWatchlistFromPreferences(watchlistOption)
 *    watchlistOption is a boolean value:
 *       true  - page watchlist status will be set based on the user's 
 *               preference settings when save() is called
 *       false - watchlist status of the page will not be changed (default)
 *
 *    Watchlist notes:
 *       1. The MediaWiki API value of 'unwatch' isn't used here because it seems to behave
 *          the same as 'nochange'. Not sure why we would want this option anyway.
 *       2. If both setWatchlist() and setWatchlistFromPreferences() are called,
 *          the last call takes priority.
 *       3. Twinkle modules should use the appropriate TwinkleConfig parameter to set the watchlist options.
 *       4. Most Twinkle modules use setWatchlist().
 *          setWatchlistFromPreferences() is only used for the few TwinkleConfig watchlist parameters
 *          that accept a string value of 'default'.
 *
 * setCreateOption(createOption)
 *    createOption is a string value:
 *       'recreate'   - create the page if it does not exist, or edit it if it exists
 *       'createonly' - create the page if it does not exist, but return an error if it
 *                      already exists
 *       'nocreate'   - don't create the page, only edit it if it already exists
 *       null         - create the page if it does not exist, unless it was deleted in the moment
 *                      between retrieving the edit token and saving the edit (default)
 *
 * exists(): returns true if the page existed on the wiki when it was last loaded
 *
 * lookupCreator(onSuccess): Retrieves the username of the user who created the page
 *    onSuccess - callback function which is called when the username is found
 *                within the callback, the username can be retrieved using the getCreator() function
 * 
 * getCreator(): returns the user who created the page following lookupCreator()
 *
 * patrol(): marks the page as patrolled (only when "rcid" is present in the query string)
 *
 * move(onSuccess, onFailure): Moves a page to another title
 *
 * deletePage(onSuccess, onFailure): Deletes a page (for admins only)
 *
 */

/**
 * Call sequence for common operations (optional final user callbacks not shown):
 *
 *    Edit current contents of a page (no edit conflict):
 *       .load(userTextEditCallback) -> ctx.loadApi.post() -> ctx.loadApi.post.success() -> 
 *             ctx.fnLoadSuccess() -> userTextEditCallback() -> .save() -> 
 *             ctx.saveApi.post() -> ctx.loadApi.post.success() -> ctx.fnSaveSuccess()
 *
 *    Edit current contents of a page (with edit conflict):
 *       .load(userTextEditCallback) -> ctx.loadApi.post() -> ctx.loadApi.post.success() -> 
 *             ctx.fnLoadSuccess() -> userTextEditCallback() -> .save() -> 
 *             ctx.saveApi.post() -> ctx.loadApi.post.success() -> ctx.fnSaveError() ->
 *             ctx.loadApi.post() -> ctx.loadApi.post.success() -> 
 *             ctx.fnLoadSuccess() -> userTextEditCallback() -> .save() -> 
 *             ctx.saveApi.post() -> ctx.loadApi.post.success() -> ctx.fnSaveSuccess()
 *
 *    Append to a page (similar for prepend):
 *       .append() -> ctx.loadApi.post() -> ctx.loadApi.post.success() -> 
 *             ctx.fnLoadSuccess() -> ctx.fnAutoSave() -> .save() -> 
 *             ctx.saveApi.post() -> ctx.loadApi.post.success() -> ctx.fnSaveSuccess()
 *
 *    Notes: 
 *       1. All functions following Wikipedia.api.post() are invoked asynchronously 
 *          from the jQuery AJAX library.
 *       2. The sequence for append/prepend could be slightly shortened, but it would require
 *          significant duplication of code for little benefit.
 */

Wikipedia.page = function(pageName, currentAction) {

	if (!currentAction) currentAction = 'Opening page "' + pageName + '"';

	/**
	 * Private context variables
	 *
	 * This context is not visible to the outside, thus all the data here
	 * must be accessed via getter and setter functions.
	 */
	var ctx = {
		 // backing fields for public properties
		pageName: pageName,
		pageText: null,
		editMode: 'all',  // save() replaces entire contents of the page by default
		appendText: null,   // can't reuse pageText for this because pageText is needed to follow a redirect
		prependText: null,  // can't reuse pageText for this because pageText is needed to follow a redirect
		editSummary: null,
		createOption: null,
		minorEdit: false,
		pageSection: null,
		maxConflictRetries: 2,
		maxRetries: 2,
		callbackParameters: null,
		statusElement: new Status(currentAction),
		followRedirect: false,
		watchlistOption: 'nochange',
		pageExists: false,
		creator: null,
		revertOldID: null,
		moveDestination: null,
		moveTalkPage: false,
		moveSubpages: false,
		moveSuppressRedirect: false,
		protectEdit: null,
		protectMove: null,
		protectCreate: null,
		protectCascade: false,
		 // internal status
		pageLoaded: false,
		editToken: null,
		loadTime: null,
		lastEditTime: null,
		revertCurID: null,
		revertUser: null,
		fullyProtected: false,
		conflictRetries: 0,
		retries: 0,
		 // callbacks
		onLoadSuccess: null,
		onLoadFailure: null,
		onSaveSuccess: null,
		onSaveFailure: null,
		onLookupCreatorSuccess: null,
		onMoveSuccess: null,
		onMoveFailure: null,
		onDeleteSuccess: null,
		onDeleteFailure: null,
		onProtectSuccess: null,
		onProtectFailure: null,
		 // internal objects
		loadQuery: null,
		loadApi: null,
		saveApi: null,
		lookupCreatorApi: null,
		moveApi: null,
		moveProcessApi: null,
		deleteApi: null,
		deleteProcessApi: null,
		protectApi: null,
		protectProcessApi: null,
	};

	/**
	 * Public interface accessors
	 */
	this.getPageName = function() {
		return ctx.pageName;
	};

	this.getPageText = function() {
		return ctx.pageText;
	};

	this.setPageText = function(pageText) {
		ctx.editMode = 'all';
		ctx.pageText = pageText;
	};

	this.setAppendText = function(appendText) {
		ctx.editMode = 'append';
		ctx.appendText = appendText;
	};

	this.setPrependText = function(prependText) {
		ctx.editMode = 'prepend';
		ctx.prependText = prependText;
	};

	this.setEditSummary = function(summary) {
		ctx.editSummary = summary;
	};

	this.setCreateOption = function(createOption) {
		ctx.createOption = createOption;
	};

	this.setMinorEdit = function(minorEdit) {
		ctx.minorEdit = minorEdit;
	};

	this.setPageSection = function(pageSection) {
		ctx.pageSection = pageSection;
	};

	this.setMaxConflictRetries = function(maxRetries) {
		ctx.maxConflictRetries = maxRetries;
	};

	this.setMaxRetries = function(maxRetries) {
		ctx.maxRetries = maxRetries;
	};

	this.setCallbackParameters = function(callbackParameters) {
		ctx.callbackParameters = callbackParameters;
	};

	this.getCallbackParameters = function() {
		return ctx.callbackParameters;
	};

	this.getCreator = function() {
		return ctx.creator;
	};

	this.setOldID = function(oldID) {
		ctx.revertOldID = oldID;
	};

	this.getRevisionUser = function() {
		return ctx.revertUser;
	};

	this.setMoveDestination = function(destination) {
		ctx.moveDestination = destination;
	}

	this.setMoveTalkPage = function(flag) {
		ctx.moveTalkPage = !!flag;
	};

	this.setMoveSubpages = function(flag) {
		ctx.moveSubpages = !!flag;
	};

	this.setMoveSuppressRedirect = function(flag) {
		ctx.moveSuppressRedirect = !!flag;
	};

	this.setEditProtection = function(level, expiry) {
		ctx.protectEdit = { level: level, expiry: expiry };
	};

	this.setMoveProtection = function(level, expiry) {
		ctx.protectMove = { level: level, expiry: expiry };
	};

	this.setCreateProtection = function(level, expiry) {
		ctx.protectCreate = { level: level, expiry: expiry };
	};

	this.setCascadingProtection = function(flag) {
		ctx.protectCascade = !!flag;
	};

	this.getStatusElement = function() {
		return ctx.statusElement;
	};

	this.setFollowRedirect = function(followRedirect) {
		if (ctx.pageLoaded) {
			ctx.statusElement.error("Internal error: cannot change redirect setting after the page has been loaded!");
			return;
		}
		ctx.followRedirect = followRedirect;
	};

	this.setWatchlist = function(flag) {
		if (flag) ctx.watchlistOption = 'watch';
		else ctx.watchlistOption = 'nochange';
	};

	this.setWatchlistFromPreferences = function(flag) {
		if (flag) ctx.watchlistOption = 'preferences';
		else ctx.watchlistOption = 'nochange';
	};

	this.exists = function() {
		return ctx.pageExists;
	};

	this.load = function(onSuccess, onFailure) {
		ctx.onLoadSuccess = onSuccess;
		ctx.onLoadFailure = onFailure;

		// Need to be able to do something after the page loads
		if (!onSuccess) {
			ctx.statusElement.error("Internal error: no onSuccess callback provided to load()!");
			return;
		}

		ctx.loadQuery = {
			action: 'query',
			prop: 'info|revisions',
			intoken: 'edit',  // fetch an edit token
			titles: ctx.pageName
			// don't need rvlimit=1 because we don't need rvstartid here and only one actual rev is returned by default
		};

		if (ctx.editMode === 'all') {
			ctx.loadQuery.rvprop = 'content';  // get the page content at the same time, if needed
		} else if (ctx.editMode === 'revert') {
			ctx.loadQuery.rvlimit = 1;
			ctx.loadQuery.rvstartid = ctx.revertOldID;
		}

		if (ctx.followRedirect) {
			ctx.loadQuery.redirects = '';  // follow all redirects
		}
		if (typeof(ctx.pageSection) === 'number') {
			ctx.loadQuery.rvsection = ctx.pageSection;
		}
		if (userIsInGroup('sysop')) {
			ctx.loadQuery.inprop = 'protection';
		}

		ctx.loadApi = new Wikipedia.api("Retrieving page...", ctx.loadQuery, fnLoadSuccess, ctx.statusElement);
		ctx.loadApi.setParent(this);
		ctx.loadApi.post();
	};

	// Save updated .pageText to Wikipedia
	// Only valid after successful .load()
	this.save = function(onSuccess, onFailure) {
		if (!ctx.pageLoaded) {
			ctx.statusElement.error("Internal error: attempt to save a page that has not been loaded!");
			return;
		}
		if (!ctx.editSummary) {
			ctx.statusElement.error("Internal error: edit summary not set before save!");
			return;
		}

		if (ctx.fullyProtected && !confirm('An automated edit to the fully protected page "' + ctx.pageName + 
			(ctx.fullyProtected === 'indefinite' ? '" (protected indefinitely)' : ('" (protection expiring ' + ctx.fullyProtected + ')')) +
			' is about to be made.  \n\nClick OK to proceed with the edit, or Cancel to skip this edit.')) {
			ctx.statusElement.error("Edit to fully protected page was aborted.");
			return;
		}

		ctx.onSaveSuccess = onSuccess;
		ctx.onSaveFailure = onFailure;
		ctx.retries = 0;

		var query = {
			action: 'edit',
			title: ctx.pageName,
			summary: ctx.editSummary,
			token: ctx.editToken,
			watchlist: ctx.watchlistOption
		};

		if (typeof(ctx.pageSection) === 'number') {
			query.section = ctx.pageSection;
		}

		// Set minor edit attribute. If these parameters are present with any value, it is interpreted as true
		if (ctx.minorEdit) {
			query.minor = true;
		} else {
			query.notminor = true;  // force Twinkle config to override user preference setting for "all edits are minor"
		}

		switch (ctx.editMode) {
		case 'append':
			query.appendtext = ctx.appendText;  // use mode to append to current page contents
			break;
		case 'prepend':
			query.prependtext = ctx.prependText;  // use mode to prepend to current page contents
			break;
		case 'revert':
			query.undo = ctx.revertCurID;
			query.undoafter = ctx.revertOldID;
			if (ctx.lastEditTime) {
				query.basetimestamp = ctx.lastEditTime; // check that page hasn't been edited since it was loaded
			}
			query.starttimestamp = ctx.loadTime; // check that page hasn't been deleted since it was loaded (don't recreate bad stuff)
			break;
		default:
			query.text = ctx.pageText; // replace entire contents of the page
			if (ctx.lastEditTime) {
				query.basetimestamp = ctx.lastEditTime; // check that page hasn't been edited since it was loaded
			}
			query.starttimestamp = ctx.loadTime; // check that page hasn't been deleted since it was loaded (don't recreate bad stuff)
			break;
		}

		if (['recreate', 'createonly', 'nocreate'].indexOf(ctx.createOption) !== -1) {
			query[ctx.createOption] = '';
		}

		ctx.saveApi = new Wikipedia.api( "Saving page...", query, fnSaveSuccess, ctx.statusElement, fnSaveError);
		ctx.saveApi.setParent(this);
		ctx.saveApi.post();
	};

	this.append = function(onSuccess, onFailure) {
		ctx.editMode = 'append';
		ctx.onSaveSuccess = onSuccess;
		ctx.onSaveFailure = onFailure;
		this.load(fnAutoSave, onFailure);
	};

	this.prepend = function(onSuccess, onFailure) {
		ctx.editMode = 'prepend';
		ctx.onSaveSuccess = onSuccess;
		ctx.onSaveFailure = onFailure;
		this.load(fnAutoSave, onFailure);
	};

	this.lookupCreator = function(onSuccess) {
		if (!onSuccess) {
			ctx.statusElement.error("Internal error: no onSuccess callback provided to lookupCreator()!");
			return;
		}
		ctx.onLookupCreatorSuccess = onSuccess;

		var query = {
			'action': 'query',
			'prop': 'revisions',
			'titles': ctx.pageName,
			'rvlimit': 1,
			'rvprop': 'user',
			'rvdir': 'newer'
		};
		
		if (ctx.followRedirect) {
			query.redirects = '';  // follow all redirects
		}
		
		ctx.lookupCreatorApi = new Wikipedia.api("Retrieving page creator information", query, fnLookupCreatorSuccess, ctx.statusElement);
		ctx.lookupCreatorApi.setParent(this);
		ctx.lookupCreatorApi.post();
	};

	this.patrol = function() {
		// look for rcid in querystring; if not, we won't have a patrol token, so no point trying
		if (!QueryString.exists("rcid")) {
			return;
		}
		var rcid = QueryString.get("rcid");

		// extract patrol token from "Mark page as patrolled" link on page
		var patrollinkmatch = /token=(.+)%2B%5C$/.exec($(".patrollink a").attr("href"));
		if (patrollinkmatch) {
			var patroltoken = patrollinkmatch[1] + "+\\";
			var patrolstat = new Status("Marking page as patrolled");

			var wikipedia_api = new Wikipedia.api("doing...", {
				title: ctx.pageName,
				action: 'markpatrolled',
				rcid: rcid,
				token: patroltoken
			}, null, patrolstat);
			wikipedia_api.post({
				type: 'GET',
				url: mw.config.get('wgServer') + mw.config.get('wgScriptPath') + '/index.php',
				datatype: 'text'  // we don't really care about the response
			});
		}
	};

	this.revert = function(onSuccess, onFailure) {
		if (!ctx.revertOldID) {
			ctx.statusElement.error("Internal error: revision ID to revert to was not set before revert!");
			return;
		}
		ctx.editMode = 'revert';
		ctx.onSaveSuccess = onSuccess;
		ctx.onSaveFailure = onFailure;
		this.load(fnAutoSave, onFailure);
	};

	this.move = function(onSuccess, onFailure) {
		if (!ctx.editSummary) {
			ctx.statusElement.error("Internal error: move reason not set before move (use setEditSummary function)!");
			return;
		}
		if (!ctx.moveDestination) {
			ctx.statusElement.error("Internal error: destination page name was not set before move!");
			return;
		}

		ctx.onMoveSuccess = onSuccess;
		ctx.onMoveFailure = onFailure;

		var query = {
			action: 'query',
			prop: 'info',
			intoken: 'move',
			titles: ctx.pageName
		};
		if (ctx.followRedirect) {
			query.redirects = '';  // follow all redirects
		}
		if (userIsInGroup('sysop')) {
			query.inprop = 'protection';
		}

		ctx.moveApi = new Wikipedia.api("retrieving move token...", query, fnProcessMove, ctx.statusElement);
		ctx.moveApi.setParent(this);
		ctx.moveApi.post();
	};

	// |delete| is a reserved word in some flavours of JS
	this.deletePage = function(onSuccess, onFailure) {
		// if a non-admin tries to do this, don't bother
		if (!userIsInGroup('sysop')) {
			ctx.statusElement.error("Cannot delete page: only admins can do that");
			return;
		}
		if (!ctx.editSummary) {
			ctx.statusElement.error("Internal error: delete reason not set before delete (use setEditSummary function)!");
			return;
		}

		ctx.onDeleteSuccess = onSuccess;
		ctx.onDeleteFailure = onFailure;

		var query = {
			action: 'query',
			prop: 'info',
			inprop: 'protection',
			intoken: 'delete',
			titles: ctx.pageName
		};
		if (ctx.followRedirect) {
			query.redirects = '';  // follow all redirects
		}

		ctx.deleteApi = new Wikipedia.api("retrieving delete token...", query, fnProcessDelete, ctx.statusElement);
		ctx.deleteApi.setParent(this);
		ctx.deleteApi.post();
	};

	this.protect = function(onSuccess, onFailure) {
		// if a non-admin tries to do this, don't bother
		if (!userIsInGroup('sysop')) {
			ctx.statusElement.error("Cannot protect page: only admins can do that");
			return;
		}
		if (!ctx.protectEdit && !ctx.protectMove && !ctx.protectCreate) {
			ctx.statusElement.error("Internal error: you must set edit and/or move and/or create protection before calling protect()!");
			return;
		}
		if (!ctx.editSummary) {
			ctx.statusElement.error("Internal error: protection reason not set before protect (use setEditSummary function)!");
			return;
		}

		ctx.onProtectSuccess = onSuccess;
		ctx.onProtectFailure = onFailure;

		var query = {
			action: 'query',
			prop: 'info',
			inprop: 'protection',
			intoken: 'protect',
			titles: ctx.pageName
		};
		if (ctx.followRedirect) {
			query.redirects = '';  // follow all redirects
		}

		ctx.protectApi = new Wikipedia.api("retrieving protect token...", query, fnProcessProtect, ctx.statusElement);
		ctx.protectApi.setParent(this);
		ctx.protectApi.post();
	};

	/**
	 * Private member functions
	 *
	 * These are not exposed outside
	 */

	// callback from loadSuccess() for append() and prepend() threads
	var fnAutoSave = function(pageobj) {
		pageobj.save(ctx.onSaveSuccess, ctx.onSaveFailure);
	};

	// callback from loadApi.post()
	var fnLoadSuccess = function() {
		var xml = ctx.loadApi.getXML();

		if ( !fnCheckPageName(xml) ) {
			return; // abort
		}

		ctx.pageExists = ($(xml).find('page').attr('missing') !== "");
		if (ctx.pageExists) {
			ctx.pageText = $(xml).find('rev').text();
		} else {
			ctx.pageText = '';  // allow for concatenation, etc.
		}

		// extract protection info, to alert admins when they are about to edit a protected page
		if (userIsInGroup('sysop')) {
			var editprot = $(xml).find('pr[type="edit"]');
			if (editprot.length > 0 && editprot.attr('level') === 'sysop') {
				ctx.fullyProtected = editprot.attr('expiry');
			} else {
				ctx.fullyProtected = false;
			}
		}

		ctx.editToken = $(xml).find('page').attr('edittoken');
		if (!ctx.editToken)
		{
			ctx.statusElement.error("Failed to retrieve edit token.");
			return;
		}
		ctx.loadTime = $(xml).find('page').attr('starttimestamp');
		if (!ctx.loadTime)
		{
			ctx.statusElement.error("Failed to retrieve start timestamp.");
			return;
		}
		ctx.lastEditTime = $(xml).find('page').attr('touched');

		if (ctx.editMode === 'revert') {
			ctx.revertCurID = $(xml).find('rev').attr('revid');
			if (!ctx.revertCurID) {
				ctx.statusElement.error("Failed to retrieve current revision ID.");
				return;
			}
			ctx.revertUser = $(xml).find('rev').attr('user');
			if (!ctx.revertUser) {
				if ($(xml).find('rev').attr('userhidden') === "") {  // username was RevDel'd or oversighted
					ctx.revertUser = "<username hidden>";
				} else {
					ctx.statusElement.error("Failed to retrieve user who made the revision.");
					return;
				}
			}
			// set revert edit summary
			ctx.editSummary = "[[Help:Revert|Reverted]] to revision " + ctx.revertOldID + " by " + ctx.revertUser + ": " + ctx.editSummary;
		}

		ctx.pageLoaded = true;

		// alert("Generate edit conflict now");  // for testing edit conflict recovery logic
		ctx.onLoadSuccess(this);  // invoke callback
	};

	// helper function to parse the page name returned from the API
	var fnCheckPageName = function(xml) {
	
		// check for invalid titles
		if ( $(xml).find('page').attr('invalid') ) {
			ctx.statusElement.error("Attempt to edit a page with invalid title: " + ctx.pageName);
			return false; // abort
		}

		// retrieve actual title of the page after normalization and redirects
		if ( $(xml).find('page').attr('title') ) {
			var resolvedName = $(xml).find('page').attr('title');
			
			// only notify user for redirects, not normalization
			if ( $(xml).find('redirects').length > 0 ) {
				Status.info("Info", "Redirected from " + ctx.pageName + " to " + resolvedName );
			}
			ctx.pageName = resolvedName;  // always update in case of normalization
		}
		else {
			// could be a circular redirect or other problem
			ctx.statusElement.error("Could not resolve redirects for: " + ctx.pageName);

			// force error to stay on the screen
			++Wikipedia.numberOfActionsLeft;
			return false; // abort
		}
		return true; // all OK
	};

	// callback from saveApi.post()
	var fnSaveSuccess = function() {
		ctx.editMode = 'all';  // cancel append/prepend/revert modes
		var xml = ctx.saveApi.getXML();

		// see if the API thinks we were successful
		if ($(xml).find('edit').attr('result') === "Success") {
		
			// real success
			if (ctx.onSaveSuccess) {
				ctx.onSaveSuccess(this);  // invoke callback
			} else {
				// default on success action - display link for edited page
				var link = document.createElement('a');
				link.setAttribute('href', mw.config.get('wgArticlePath').replace('$1', ctx.pageName));
				link.appendChild(document.createTextNode(ctx.pageName));
				ctx.statusElement.info(['completed (', link, ')']);
			}
			return;
		}
		
		// errors here are only generated by extensions which hook APIEditBeforeSave within MediaWiki
		// Wikimedia wikis should only return spam blacklist errors and captchas
		var blacklist = $(xml).find('edit').attr('spamblacklist');

		if (blacklist) {
			var code = document.createElement('code');
			code.style.fontFamily = "monospace";
			code.appendChild(document.createTextNode(blacklist));
			ctx.statusElement.error(['Could not save the page because the URL ', code, ' is on the spam blacklist.']);
		}
		else if ( $(xml).find('captcha').length > 0 ) {
			ctx.statusElement.error("Could not save the page because the wiki server wanted you to fill out a CAPTCHA.");
		}
		else {
			ctx.statusElement.error("Unknown error received from API while saving page");
		}
		
		// force error to stay on the screen
		++Wikipedia.numberOfActionsLeft;
	};

	// callback from saveApi.post()
	var fnSaveError = function() {

		var errorCode = ctx.saveApi.getErrorCode();

		// check for edit conflict
		if ( errorCode === "editconflict" && ctx.conflictRetries++ < ctx.maxConflictRetries ) {
			 
			// edit conflicts can occur when the page needs to be purged from the server cache
			var purgeQuery = {
				action: 'purge',
				titles: ctx.pageName  // redirects are already resolved
			};

			var purgeApi = new Wikipedia.api("Edit conflict detected, purging server cache", purgeQuery, null, ctx.statusElement);
			var result = purgeApi.post( { async: false } );  // just wait for it, result is for debugging

			--Wikipedia.numberOfActionsLeft;  // allow for normal completion if retry succeeds
			
			ctx.statusElement.info("Edit conflict detected, reapplying edit");
			ctx.loadApi.post(); // reload the page and reapply the edit

		// check for loss of edit token
		// it's impractical to request a new token here, so invoke edit conflict logic when this happens
		} else if ( errorCode === "notoken" && ctx.conflictRetries++ < ctx.maxConflictRetries ) {
			 
			ctx.statusElement.info("Edit token is invalid, retrying");
			--Wikipedia.numberOfActionsLeft;  // allow for normal completion if retry succeeds
			ctx.loadApi.post(); // reload

		// check for network or server error
		} else if ( errorCode === "undefined" && ctx.retries++ < ctx.maxRetries ) {

			// the error might be transient, so try again
			ctx.statusElement.info("Save failed, retrying");
			--Wikipedia.numberOfActionsLeft;  // allow for normal completion if retry succeeds
			ctx.saveApi.post(); // give it another go!

		// hard error, give up
		} else {

			// non-admin attempting to edit a protected page - this gives a friendlier message than the default
			if ( errorCode === "protectedpage" ) {
				ctx.statusElement.error( "Failed to save edit: Page is fully protected" );
			} else {
				ctx.statusElement.error( "Failed to save edit: " + ctx.saveApi.getErrorText() );
			}
			ctx.editMode = 'all';  // cancel append/prepend/revert modes
			if (ctx.onSaveFailure) {
				ctx.onSaveFailure(this);  // invoke callback
			}
		}
	};

	var fnLookupCreatorSuccess = function() {
		var xml = ctx.lookupCreatorApi.getXML();
		
		if ( !fnCheckPageName(xml) ) {
			return; // abort
		}

		ctx.creator = $(xml).find('rev').attr('user');
		if (!ctx.creator) {
			ctx.statusElement.error("Could not find name of page creator");
			return;
		}
		ctx.onLookupCreatorSuccess(this);
	};

	var fnProcessMove = function() {
		var xml = ctx.moveApi.getXML();

		if ($(xml).find('page').attr('missing') === "") {
			ctx.statusElement.error("Cannot move the page, because it no longer exists");
			return;
		}

		// extract protection info
		if (userIsInGroup('sysop')) {
			var editprot = $(xml).find('pr[type="edit"]');
			if (editprot.length > 0 && editprot.attr('level') === 'sysop' && !confirm('You are about to move the fully protected page "' + ctx.pageName + 
				(editprot.attr('expiry') === 'indefinite' ? '" (protected indefinitely)' : ('" (protection expiring ' + editprot.attr('expiry') + ')')) +
				'.  \n\nClick OK to proceed with the move, or Cancel to skip this move.')) {
				ctx.statusElement.error("Move of fully protected page was aborted.");
				return;
			}
		}

		var moveToken = $(xml).find('page').attr('movetoken');
		if (!moveToken) {
			ctx.statusElement.error("Failed to retrieve delete token.");
			return;
		}

		var query = {
			'action': 'move',
			'from': $(xml).find('page').attr('title'),
			'to': ctx.moveDestination,
			'token': moveToken,
			'reason': ctx.editSummary
		};
		if (ctx.moveTalkPage) {
			query.movetalk = 'true';
		}
		if (ctx.moveSubpages) {
			query.movesubpages = 'true';  // XXX don't know whether this works for non-admins
		}
		if (ctx.moveSuppressRedirect) {
			query.noredirect = 'true';
		}
		if (ctx.watchlistOption === 'watch') {
			query.watch = 'true';
		}

		ctx.moveProcessApi = new Wikipedia.api("moving page...", query, ctx.onMoveSuccess, ctx.statusElement, ctx.onMoveFailure);
		ctx.moveProcessApi.setParent(this);
		ctx.moveProcessApi.post();
	};

	var fnProcessDelete = function() {
		var xml = ctx.deleteApi.getXML();

		if ($(xml).find('page').attr('missing') === "") {
			ctx.statusElement.error("Cannot delete the page, because it no longer exists");
			return;
		}

		// extract protection info
		var editprot = $(xml).find('pr[type="edit"]');
		if (editprot.length > 0 && editprot.attr('level') === 'sysop' && !confirm('You are about to delete the fully protected page "' + ctx.pageName + 
			(editprot.attr('expiry') === 'indefinite' ? '" (protected indefinitely)' : ('" (protection expiring ' + editprot.attr('expiry') + ')')) +
			'.  \n\nClick OK to proceed with the deletion, or Cancel to skip this deletion.')) {
			ctx.statusElement.error("Deletion of fully protected page was aborted.");
			return;
		}

		var deleteToken = $(xml).find('page').attr('deletetoken');
		if (!deleteToken) {
			ctx.statusElement.error("Failed to retrieve delete token.");
			return;
		}

		var query = {
			'action': 'delete',
			'title': $(xml).find('page').attr('title'),
			'token': deleteToken,
			'reason': ctx.editSummary
		};
		if (ctx.watchlistOption === 'watch') {
			query.watch = 'true';
		}

		ctx.deleteProcessApi = new Wikipedia.api("deleting page...", query, ctx.onDeleteSuccess, ctx.statusElement, ctx.onDeleteFailure);
		ctx.deleteProcessApi.setParent(this);
		ctx.deleteProcessApi.post();
	};

	var fnProcessProtect = function() {
		var xml = ctx.protectApi.getXML();

		if ($(xml).find('page').attr('missing') === "") {
			ctx.statusElement.error("Cannot protect the page, because it no longer exists");
			return;
		}

		var editprot = $(xml).find('pr[type="edit"]');
		// cascading protection not possible on edit<sysop
		// XXX fix this logic - I can't wrap my head around it
		//if (ctx.protectCascade && (editprot && editprot.attr('level') !== 'sysop') && (ctx.protectEdit && ctx.protectEdit.level !== 'sysop')) {
		//	ctx.statusElement.error("Internal error: cascading protection requires sysop-level edit protection!");
		//	return;
		//}

		var protectToken = $(xml).find('page').attr('protecttoken');
		if (!protectToken) {
			ctx.statusElement.error("Failed to retrieve protect token.");
			return;
		}

		var protections = '', expiry = '';
		if (ctx.protectEdit) {
			protections += 'edit=' + ctx.protectEdit.level;
			expiry += ctx.protectEdit.expiry;
		}
		if (ctx.protectMove) { 
			if (ctx.protectEdit) {
				protections += '|';
				expiry += '|';
			}
			protections += 'move=' + ctx.protectMove.level;
			expiry += ctx.protectMove.expiry;
		}
		if (ctx.protectCreate) {
			if (ctx.protectEdit || ctx.protectMove) {
				protections += '|';
				expiry += '|';
			}
			protections += 'create=' + ctx.protectCreate.level;
			expiry += ctx.protectCreate.expiry;
		}
		var query = {
			action: 'protect',
			title: $(xml).find('page').attr('title'),
			token: protectToken,
			protections: protections,
			expiry: expiry,
			reason: ctx.editSummary
		};
		if (ctx.protectCascade) {
			query.cascade = 'true';
		}
		if (ctx.watchlistOption === 'watch') {
			query.watch = 'true';
		}

		ctx.protectProcessApi = new Wikipedia.api("protecting page...", query, ctx.onProtectSuccess, ctx.statusElement, ctx.onProtectFailure);
		ctx.protectProcessApi.setParent(this);
		ctx.protectProcessApi.post();
	};
} /* end Wikipedia.page */

/** Issues:
 * - Do we need the onFailure callbacks? How do we know when to call them? Timeouts? Enhance Wikipedia.api for failures?
 * - Should we retry loads also?
 * - Need to reset current action before the save?
 * - Deal with action.completed stuff
 * - XXX need to reset all parameters once done (e.g. edit summary, move destination, etc.)
 */

/*
 currentAction: text, the current action (required)
 query: Object, the query (required)
 oninit: function, the function to call when page gotten (required)
 onsuccess: function, a function to call when post succeeded
 onerror: function, a function to call when we abort failed posts
 onretry: function, a function to call when we try to retry a post
 */
Wikipedia.wiki = function( currentAction, query, oninit, onsuccess, onerror, onretry ) {

	var node = document.createElement("div");
	node.style.background = "#F9F9F9";
	node.style.border = "1px solid maroon";
	node.style.padding = "0.6em 0.8em";
	node.style.margin = "0.5em";
	node.style.fontSize = "small";
	node.innerHTML = "<b>This user script is using the deprecated \"Wikipedia.wiki\" class to edit the wiki. " +
		"It may cease to function in the near future.</b><br />Please pass this message on to the script's maintainer, to ensure the script is upgraded.<br />" +
		"(The developers of Twinkle are happy to assist script maintainers with updating scripts.)";
	Status.warn(currentAction, [ node ]);

	this.currentAction = currentAction;
	this.query = query;
	this.oninit = oninit;
	this.onsuccess = onsuccess;
	this.onerror = onerror;
	this.onretry = onretry;
	this.statelem = new Status( currentAction );
	++Wikipedia.numberOfActionsLeft;
}

Wikipedia.wiki.prototype = {
	currentAction: '',
	onsuccess: null,
	onerror: null,
	onretry: null,
	oninit: null,
	query: null,
	postData: null,
	responseXML: null,
	statelem: null,
	counter: 0,
	post: function( data ) {
		this.postData = data;
		if( Wikipedia.editCount <= 0 ) {
			this.query['maxlag'] = wpMaxLag; // are we a bot?
		} else {
			--Wikipedia.editCount;
		}

		var xmlhttp = sajax_init_object();
		Wikipedia.dump.push( xmlhttp );
		xmlhttp.obj = this;
		xmlhttp.overrideMimeType('text/xml');
		xmlhttp.open( 'POST' , mw.config.get('wgServer') + mw.config.get('wgScriptPath') + '/index.php?useskin=monobook&' + QueryString.create( this.query ), true);
		xmlhttp.setRequestHeader('Content-type','application/x-www-form-urlencoded');
		xmlhttp.onerror = function(e) {
			this.obj.statelem.error( "Error " + this.status + " occurred while posting the document." );
		}
		xmlhttp.onload = function(e) {
			var self = this.obj;
			var status = this.status;
			if( status !== 200 ) {
				if( status === 503 ) {
					var retry = this.getResponseHeader( 'Retry-After' );
					var lag = this.getResponseHeader( 'X-Database-Lag' );
					if( lag ) {
						self.statelem.warn( "current lag of " + lag + " seconds is more than our defined maximum lag of " + wpMaxLag + " seconds, will retry in " + retry + " seconds" );
						window.setTimeout( function( self ) { self.post( self.postData ); }, retry * 1000, self );
						return;
					} else {
						self.statelem.error( "Error " + status + " occurred while posting the document." );
					}
				}
				return;
			}
			var xmlDoc;
			xmlDoc = self.responseXML = this.responseXML;
			var xpathExpr =  'boolean(//div[@class=\'previewnote\']/p/strong[contains(.,\'Sorry! We could not process your edit due to a loss of session data\')])';
			var nosession = xmlDoc.evaluate( xpathExpr, xmlDoc, null, XPathResult.BOOLEAN_TYPE, null ).booleanValue;
			if( nosession ) {
				// Grabbing the shipping token, and repost
				var new_token = xmlDoc.evaluate( '//input[@name="wfEditToken"]/@value', xmlDoc, null, XPathResult.STRING_TYPE, null ).stringValue;
				self.postData['wfEditToken'] = new_token;
				self.post( self.postData );
			} else {
				if( self.onsuccess ) {
					self.onsuccess( self );
				} else {
					var link = document.createElement( 'a' );
					link.setAttribute( 'href', mw.config.get('wgArticlePath').replace( '$1', self.query['title'] ) );
					link.setAttribute( 'title', self.query['title'] );
					link.appendChild( document.createTextNode( self.query['title'] ) );

					self.statelem.info( [ 'completed (' , link , ')' ] );
				}
				Wikipedia.actionCompleted();
			}
		};
		xmlhttp.send( QueryString.create( this.postData ) );
	},
	get: function() {
		this.onloading( this );
		var redirect_query = {
			'action': 'query',
			'titles': this.query['title'],
			'redirects': ''
		}

		var wikipedia_api = new Wikipedia.api( "resolving eventual redirect", redirect_query, this.postget, this.statelem );
		wikipedia_api.parent = this;
		wikipedia_api.post();
	},
	// note: this was updated in April 2011 to work with the revamped Wikipedia.api class.
	// This was done so a lot of user scripts that use morebits didn't break down.
	// But some deprecated technologies, like XPath and sajax, were kept intentionally, to
	// discourage future consumers, and to not widen compatibility (i.e. doesn't work in IE9).
	postget: function(apiobj) {
		var xmlDoc = apiobj.getXML();
		var to = xmlDoc.evaluate( '//redirects/r/@to', xmlDoc, null, XPathResult.STRING_TYPE, null ).stringValue;
		if( !this.followRedirect ) {
			this.statelem.info('ignoring eventual redirect');
		} else if( to ) {
			this.query['title'] = to;
		}
		this.onloading( this );
		var xmlhttp = sajax_init_object();
		Wikipedia.dump.push( xmlhttp );
		xmlhttp.obj = this;
		xmlhttp.overrideMimeType('text/xml');
		xmlhttp.open( 'GET' , mw.config.get('wgServer') + mw.config.get('wgScriptPath') + '/index.php?useskin=monobook&' + QueryString.create( this.query ), true);
		xmlhttp.onerror = function() {
			this.obj.statelem.error( "Error " + this.status + " occurred while receiving the document." );
		}
		xmlhttp.onload = function() { 
			this.obj.onloaded( this.obj );
			this.obj.responseXML = this.responseXML;
			this.obj.responseText = this.responseText;
			this.obj.oninit( this.obj ); 
		};
		xmlhttp.send( null );
	},
	onloading: function() {
		this.statelem.status( 'loading data...' );
	},
	onloaded: function() {
		this.statelem.status( 'data loaded...' );
	}
}

/**
 * These functions retrieve the date from the server. It uses bandwidth, time, etc.
 * They should be used only when the magic words { {subst:CURRENTDAY}},
 * { {subst:CURRENTMONTHNAME}}, and { {subst:CURRENTYEAR}} cannot be used
 * (for example, when specifying the title of a page).
 */
//WikiDate = {
//  currentLongDate: false,
  // Gets the server date in yyyy mmmm dd format (e.g. for XfD daily pages).
//  getLongDate: function wikiDateGetLongDate()
//  {
//    var query = {
//      'action': 'expandtemplates',
//      'text': '\{\{CURRENTYEAR}} \{\{CURRENTMONTHNAME}} \{\{CURRENTDAY}}'
//    };
//    var callback = function(self) 
//    {

//    };
//    var wpapi = new Wikipedia.api("Retrieving server date", query, callback);
    // AJAX is async, unfortunately; this stuff is not a nice solution
//    for (var i = 0; i < 20; i++)

//  }
//};

Number.prototype.zeroFill = function( length ) {
	var str = this.toFixed();
	if( !length ) { return str; }
	while( str.length < length ) { str = '0' + str; }
	return str;
}

var Mediawiki = {};

Mediawiki.Template = {
	parse: function( text, start ) {
		var count = -1;
		var level = -1;
		var equals = -1;
		var current = '';
		var result = {
			name: '',
			parameters: {}
		};

		for( var i = start; i < text.length; ++i ) {
			var test3 = text.substr( i, 3 );
			if( test3 === '\{\{\{' ) {
				current += '\{\{\{';
				i += 2;
				++level;
				continue;
			}
			if( test3 === '\}\}\}' ) {
				current += '\}\}\}';
				i += 2;
				--level;
				continue;
			}
			var test2 = text.substr( i, 2 );
			if( test2 === '\{\{' || test2 === '\[\[' ) {
				current += test2;
				++i;
				++level;
				continue;
			}
			if( test2 === '\]\]' ) {
				current += test2;
				++i;
				--level;
				continue;
			}
			if( test2 === '\}\}' ) {
				current += test2;
				++i;
				--level;

				if( level <= 0 ) {
					if( count === -1 ) {
						result.name = current.substring(2).trim();
						++count;
					} else {
						if( equals !== -1 ) {
							var key = current.substring( 0, equals ).trim();
							var value = current.substring( equals ).trim();
							result.parameters[key] = value;
							equals = -1;
						} else {
							result.parameters[count] = current;
							++count;
						}
					}
					break;
				}
				continue;
			}

			if( text.charAt(i) === '|' && level <= 0 ) {
				if( count === -1 ) {
					result.name = current.substring(2).trim();
					++count;
				} else {
					if( equals !== -1 ) {
						var key = current.substring( 0, equals ).trim();
						var value = current.substring( equals + 1 ).trim();
						result.parameters[key] = value;
						equals = -1;
					} else {
						result.parameters[count] = current;
						++count;
					}
				}
				current = '';
			} else if( equals === -1 && text.charAt(i) === '=' && level <= 0 ) {
				equals = current.length;
				current += text.charAt(i);
			} else {
				current += text.charAt(i);
			}
		}

		return result;
	}
}

Mediawiki.Page = function mediawikiPage( text ) {
	this.text = text;
}


Mediawiki.Page.prototype = {
	text: '',
	removeLink: function( link_target ) {
		var first_char = link_target.substr( 0, 1 );
		var link_re_string = "[" + first_char.toUpperCase() + first_char.toLowerCase() + ']' +  RegExp.escape( link_target.substr( 1 ), true );
		var link_simple_re = new RegExp( "\\[\\[:?(" + link_re_string + ")\\|?\\]\\]", 'g' );
		var link_named_re = new RegExp( "\\[\\[:?" + link_re_string + "\\|(.+?)\\]\\]", 'g' );
		if( link_simple_re.test(this.text) ) {
			this.text = this.text.replace( link_simple_re, "$1" );
		} else {
			this.text = this.text.replace( link_named_re, "$1" );
		}
	},
	commentOutImage: function( image, reason ) {
		var unbinder = new Unbinder( this.text );
		unbinder.unbind( '<!--', '-->' );

		reason = reason ? ' ' + reason + ': ' : '';
		var first_char = image.substr( 0, 1 );
		var image_re_string = "[" + first_char.toUpperCase() + first_char.toLowerCase() + ']' +  RegExp.escape( image.substr( 1 ), true ); 

		/*
		 * Check for normal image links, i.e. [[Image:Foobar.png|...]]
		 * Will eat the whole link
		 */
		var links_re = new RegExp( "\\[\\[(?:[Ii]mage|[Ff]ile):\\s*" + image_re_string );
		var allLinks = unbinder.content.splitWeightedByKeys( '[[', ']]' ).uniq();
		for( var i = 0; i < allLinks.length; ++i ) {
			if( links_re.test( allLinks[i] ) ) {
				var replacement = '<!-- ' + reason + allLinks[i] + ' -->';
				unbinder.content = unbinder.content.replace( allLinks[i], replacement, 'g' );
			}
		}
		// unbind the newly created comments
		unbinder.unbind( '<!--', '-->' );

		/*
		 * Check for gallery images, i.e. instances that must start on a new line, eventually preceded with some space, and must include Image: prefix
		 * Will eat the whole line.
		 */
		var gallery_image_re = new RegExp( "(^\\s*(?:[Ii]mage|[Ff]ile):\\s*" + image_re_string + ".*?$)", 'mg' );
		unbinder.content.replace( gallery_image_re, "<!-- " + reason + "$1 -->" );

		// unbind the newly created comments
		unbinder.unbind( '<!--', '-->' );
		/*
		 * Check free image usages, for example as template arguments, might have the Image: prefix excluded, but must be preceeded by an |
		 * Will only eat the image name and the preceeding bar and an eventual named parameter
		 */
		var free_image_re = new RegExp( "(\\|\\s*(?:[\\w\\s]+\\=)?\\s*(?:(?:[Ii]mage|[Ff]ile):\\s*)?" + image_re_string + ")", 'mg' );
		unbinder.content.replace( free_image_re, "<!-- " + reason + "$1 -->" );

		// Rebind the content now, we are done!
		this.text = unbinder.rebind();
	},
	addToImageComment: function( image, data ) {
		var first_char = image.substr( 0, 1 );
		var image_re_string = "(?:[Ii]mage|[Ff]ile):\\s*[" + first_char.toUpperCase() + first_char.toLowerCase() + ']' +  RegExp.escape( image.substr( 1 ), true ); 
		var links_re = new RegExp( "\\[\\[" + image_re_string );
		var allLinks = this.text.splitWeightedByKeys( '[[', ']]' ).uniq();
		for( var i = 0; i < allLinks.length; ++i ) {
			if( links_re.test( allLinks[i] ) ) {
				var replacement = allLinks[i];
				// just put it at the end?
				replacement = replacement.replace( /\]\]$/, '|' + data + ']]' );
				this.text = this.text.replace( allLinks[i], replacement, 'g' );
			}
		}
		var gallery_re = new RegExp( "^(\\s*" + image_re_string + '.*?)\\|?(.*?)$', 'mg' );
		var replacement = "$1|$2 " + data;
		this.text = this.text.replace( gallery_re, replacement );
	},
	removeTemplate: function( template ) {
		var first_char = template.substr( 0, 1 );
		var template_re_string = "(?:[Tt]emplate:)?\\s*[" + first_char.toUpperCase() + first_char.toLowerCase() + ']' +  RegExp.escape( template.substr( 1 ), true ); 
		var links_re = new RegExp( "\\\{\\\{" + template_re_string );
		var allTemplates = this.text.splitWeightedByKeys( '{\{', '}}', [ '{{{', '}}}' ] ).uniq();
		for( var i = 0; i < allTemplates.length; ++i ) {
			if( links_re.test( allTemplates[i] ) ) {
				this.text = this.text.replace( allTemplates[i], '', 'g' );
			}
		}

	},
	getText: function() {
		return this.text;
	}
}

/**
* 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;
}

/* Returns true if given string contains a valid IP-address, that is, from 0.0.0.0 to 255.255.255.255*/
function isIPAddress( string ){
	var res = /(\d{1,4})\.(\d{1,3})\.(\d{1,3})\.(\d{1,4})/.exec( string );
	return res && res.slice( 1, 5 ).every( function( e ) { return e < 256; } );
}

/**
* 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
* QueryString.create( hash )
*     creates an querystring and encodes strings via encodeURIComponent and joins arrays with | 
*
* In static context, the value of location.search.substring(1), else the value given to the constructor is going to be used. The mapped hash is saved in the object.
*
* Example:
*
* var value = QueryString.get('key');
* var obj = new QueryString('foo=bar&baz=quux');
* value = obj.get('foo');
*/
function QueryString(qString) {
	this.string = qString;
	this.params = {};

	if( !qString.length ) {
		return;
	}

	qString.replace(/\+/, ' ');
	var args = qString.split('&');

	for( var i = 0; i < args.length; ++i ) {
		var pair = args[i].split( '=' );
		var key = decodeURIComponent( pair[0] ), value = key;

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

		this.params[key] = value;
	}
}

QueryString.staticstr = null;

QueryString.staticInit = function() {
	if( !QueryString.staticstr ) {
		QueryString.staticstr = new QueryString(location.search.substring(1));
	}
}

QueryString.get = function(key) {
	QueryString.staticInit();
	return QueryString.staticstr.get(key);
};

QueryString.prototype.get = function(key) {
	return this.params[key] ? this.params[key] : null;
};

QueryString.exists = function(key) {
	QueryString.staticInit();
	return QueryString.staticstr.exists(key);
}

QueryString.prototype.exists = function(key) {
	return this.params[key] ? true : false;
}

QueryString.equals = function(key, value) {
	QueryString.staticInit();
	return QueryString.staticstr.equals(key, value);
}

QueryString.prototype.equals = function(key, value) {
	return this.params[key] === value ? true : false;
}

QueryString.toString = function() {
	QueryString.staticInit();
	return QueryString.staticstr.toString();
}

QueryString.prototype.toString = function() {
	return this.string ? this.string : null;
}


QueryString.create = function( arr ) {
	var resarr = [];
	var editToken;  // KLUGE: this should always be the last item in the query string (bug TW-B-0013)
	for( var i in arr ) {
		if( typeof arr[i] === 'undefined' ) {
			continue;
		}
		var res;
		if( arr[i] instanceof Array ){
			var v = [];
			for(var j = 0; j < arr[i].length; ++j ) {
				v[j] = encodeURIComponent( arr[i][j] );
			}
			res = v.join('|');
		} else {
			res = encodeURIComponent( arr[i] );
		}
		if( i === 'wpEditToken' ) {
			editToken = res;
		} else {
			resarr.push( encodeURIComponent( i ) + '=' + res );
		}
	}
	if( typeof editToken !== 'undefined' ) {
		resarr.push( 'wpEditToken=' + editToken );
	}
	return resarr.join('&');
}
QueryString.prototype.create = QueryString.create;

/**
* Simple exception handling
*/

var Exception = function( message ) {
	this.message = message || '';
	this.name = "Exception";
}

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

function Status( text, stat, type ) {
	this.text = this.codify(text);
	this.stat = this.codify(stat);
	this.type = type || 'status';
	// XXX temporary hack to force the page not to reload when an error is output - see also update() below
	if (type === 'error') Wikipedia.numberOfActionsLeft = 1000;
	this.generate(); 
	if( stat ) {
		this.render();
	}
}
Status.init = function( root ) {
	if( !( root instanceof Element ) ) {
		throw new Exception( 'object not an instance of Element' );
	}
	while( root.hasChildNodes() ) {
		root.removeChild( root.firstChild );
	}
	Status.root = root;

	var cssNode = document.createElement('style');
	cssNode.type = 'text/css';
	cssNode.rel = 'stylesheet';
	cssNode.appendChild( document.createTextNode("")); // Safari bugfix
	document.getElementsByTagName("head")[0].appendChild(cssNode);
	var styles = cssNode.sheet ? cssNode.sheet : cssNode.stylesSheet;
	styles.insertRule(".tw_status_status { color: SteelBlue; }", 0);
	styles.insertRule(".tw_status_info { color: ForestGreen; }", 0);
	styles.insertRule(".tw_status_warn { color: OrangeRed; }", 0);
	styles.insertRule(".tw_status_error { color: OrangeRed; font-weight: bold; }", 0);
}
Status.root = null;

Status.prototype = {
	stat: null,
	text: null,
	type: 'status',
	target: null,
	node: null,
	linked: false,
	link: function() {
		if( ! this.linked && Status.root ) {
			Status.root.appendChild( this.node );
			this.linked = true;
		}
	},
	unlink: function() {
		if( this.linked ) {
			Status.root.removeChild( this.node );
			this.linked = false;
		}
	},
	codify: function( obj ) {
		if ( ! ( obj instanceof Array ) ) {
			obj = [ obj ];
		}
		var result;
		result = document.createDocumentFragment();
		for( var i = 0; i < obj.length; ++i ) {
			if( typeof obj[i] === 'string' ) {
				result.appendChild( document.createTextNode( obj[i] ) );
			} else if( obj[i] instanceof Element ) {
				result.appendChild( obj[i] );
			} // Else cosmic radiation made something shit
		}
		return result;

	},
	update: function( status, type ) {
		this.stat = this.codify( status );
		if( type ) {
			this.type = type;
			// XXX temporary hack to force the page not to reload when an error is output - see also Status() above
			if (type === 'error') Wikipedia.numberOfActionsLeft = 1000;
		}
		this.render();
	},
	generate: function() {
		this.node = document.createElement( 'div' );
		this.node.appendChild( document.createElement('span') ).appendChild( this.text );
		this.node.appendChild( document.createElement('span') ).appendChild( document.createTextNode( ': ' ) );
		this.target = this.node.appendChild( document.createElement( 'span' ) );
		this.target.appendChild(  document.createTextNode( '' ) ); // dummy node
	},
	render: function() {
		this.node.className = 'tw_status_' + this.type;
		while( this.target.hasChildNodes() ) {
			this.target.removeChild( this.target.firstChild );
		}
		this.target.appendChild( this.stat );
		this.link();
	},
	status: function( status ) {
		this.update( status, 'status');
	},
	info: function( status ) {
		this.update( status, 'info');
	},
	warn: function( status ) {
		this.update( status, 'warn');
	},
	error: function( status ) {
		this.update( status, 'error');
	}
}

Status.status = function( text, status ) {
	return new Status( text, status, 'status' );
}
Status.info = function( text, status ) {
	return new Status( text, status, 'info' );
}
Status.warn = function( text, status ) {
	return new Status( text, status, 'warn' );
}
Status.error = function( text, status ) {
	return new Status( text, status, 'error' );
}

// 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 draggable window
// now a wrapper for jQuery UI's dialog feature

// The height passed in here is the maximum allowable height for the content area.
function SimpleWindow( width, height ) {
	var content = document.createElement( 'div' );
	this.content = content;
	content.className = 'morebits-dialog-content';

	this.height = height;

	$(this.content).dialog({
			autoOpen: false,
			buttons: { "Placeholder button": function() {} },
			dialogClass: 'morebits-dialog',
			width: Math.min(parseInt(window.innerWidth), parseInt(width ? width : 800)),
			// give jQuery the given height value (which represents the anticipated height of the dialog) here, so
			// it can position the dialog appropriately
			// the 20 pixels represents adjustment for the extra height of the jQuery dialog "chrome", compared
			// to that of the old SimpleWindow
			height: height + 20
		}).bind("dialogresize", function(event, ui) {
			this.style.maxHeight = "";
		});

	var $widget = $(this.content).dialog("widget");

	// delete the placeholder button (it's only there so the buttonpane gets created)
	$widget.find("button").each(function(key, value) {
		value.parentNode.removeChild(value);
	});

	// add container for the buttons we add, and the footer links (if any)
	var buttonspan = document.createElement("span");
	buttonspan.className = "morebits-dialog-buttons";
	var linksspan = document.createElement("span");
	linksspan.className = "morebits-dialog-footerlinks";
	$widget.find(".ui-dialog-buttonpane").append(buttonspan, linksspan);
}

SimpleWindow.prototype = {
	buttons: [],
	height: 600,
	hasFooterLinks: false,
	scriptName: null,

	// Focuses the dialog. This might work, or on the contrary, it might not.
	focus: function(event) {
		$(this.content).dialog("moveToTop");
	},
	// Closes the dialog.  If this is set as an event handler, it will stop the event from doing anything more.
	close: function(event) {
		event.preventDefault();
		$(this.content).dialog("close");
	},
	// Shows the dialog.  Calling display() on a dialog that has previously been closed might work, but it is not guaranteed.
	display: function() {
		if (this.scriptname) {
			var $widget = $(this.content).dialog("widget");
			$widget.find(".morebits-dialog-scriptname").remove();
			var scriptnamespan = document.createElement("span");
			scriptnamespan.className = "morebits-dialog-scriptname";
			scriptnamespan.textContent = this.scriptname + " \u00B7 ";  // U+00B7 MIDDLE DOT = &middot;
			$widget.find(".ui-dialog-title").prepend(scriptnamespan);
		}

		$(this.content).dialog("open");
		this.setHeight( this.height );  // init height algorithm
	},
	// Sets the dialog title.
	setTitle: function( title ) {
		$(this.content).dialog("option", "title", title);
	},
	// Sets the script name, appearing as a prefix to the title to help users determine which
	// user script is producing which dialog. For instance, Twinkle modules set this to "Twinkle".
	setScriptName: function( scriptname ) {
		this.scriptname = scriptname;
	},
	// Sets the dialog width.
	setWidth: function( width ) {
		$(this.content).dialog("option", "width", width);
	},
	// Sets the dialog's maximum height. The dialog will auto-size to fit its contents,
	// but the content area will grow no larger than the height given here.
	setHeight: function( height ) {
		this.height = height;

		// from display time onwards, let the browser determine the optimum height, and instead limit the height at the given value
		// note that the given height will exclude the approx. 20px that the jQuery UI chrome has in height in addition to the height
		// of an equivalent "classic" SimpleWindow
		if (parseInt(getComputedStyle($(this.content).dialog("widget")[0]).height) > window.innerHeight) {
			$(this.content).dialog("option", "height", window.innerHeight - 2).dialog("option", "position", "top");
		} else {
			$(this.content).dialog("option", "height", "auto");
		}
		$(this.content).dialog("widget").find(".morebits-dialog-content")[0].style.maxHeight = parseInt(this.height - 30) + "px";
	},
	// Sets the content of the dialog to the given element node, usually from rendering a QuickForm or QuickForm element.
	// Re-enumerates the footer buttons, but leaves the footer links as they are.
	// Be sure to call this at least once before the dialog is displayed...
	setContent: function( content ) {
		this.purgeContent();
		this.addContent( content );
	},
	addContent: function( content ) {
		this.content.appendChild( content );

		// look for submit buttons in the content, hide them, and add a proxy button to the button pane
		var thisproxy = this;
		$(this.content).find('input[type="submit"], button[type="submit"]').each(function(key, value) {
				value.style.display = "none";
				var button = document.createElement("button");
				button.textContent = (value.hasAttribute("value") ? value.getAttribute("value") : (value.textContent ? value.textContent : "Submit Query"));
				// here is an instance of cheap coding, probably a memory-usage hit in using a closure here
				button.addEventListener("click", function() { value.click(); }, false);
				thisproxy.buttons.push(button);
			});
		// remove all buttons from the button pane and re-add them
		if (this.buttons.length > 0) {
			$(this.content).dialog("widget").find(".morebits-dialog-buttons").empty().append(this.buttons)[0].removeAttribute("data-empty");
		} else {
			$(this.content).dialog("widget").find(".morebits-dialog-buttons")[0].setAttribute("data-empty", "data-empty");  // used by CSS
		}
	},
	purgeContent: function( content ) {
		this.buttons = [];
		// delete all buttons in the buttonpane
		$(this.content).dialog("widget").find(".morebits-dialog-buttons").empty();

		while( this.content.hasChildNodes() ) {
			this.content.removeChild( this.content.firstChild );
		}
	},
	// Adds a link in the bottom-right corner of the dialog.
	// This can be used to provide help or policy links.
	// For example, Twinkle's CSD module adds a link to the CSD policy page,
	// as well as a link to Twinkle's documentation.
	addFooterLink: function( text, wikiPage ) {
		var $footerlinks = $(this.content).dialog("widget").find(".morebits-dialog-footerlinks");
		if (this.hasFooterLinks) {
			var bullet = document.createElement("span");
			bullet.textContent = " \u2022 ";  // U+2022 BULLET
			$footerlinks.append(bullet);
		}
		var link = document.createElement("a");
		link.setAttribute("href", "/wiki/" + wikiPage);
		link.setAttribute("title", wikiPage);
		link.setAttribute("target", "_blank");
		link.textContent = text;
		$footerlinks.append(link);
		this.hasFooterLinks = true;
	},
	moveWindow: function( x, y ) {
		// XXX needs to be implemented
		//this.frame.style.left = x - this.initialX + 'px';
		//this.frame.style.top  = y - this.initialY + 'px';
		alert("code tried to move a SimpleWindow - not yet implemented...");
	},
	resizeWindow: function( x, y ) {
		// XXX needs to be implemented
		//this.frame.style.height  = Math.max( parseInt( y - this.frame.offsetTop ), 200 ) + 'px';
		//this.frame.style.width = Math.max( parseInt( x -  this.frame.offsetLeft ), 200 ) + 'px';
		alert("code tried to resize a SimpleWindow - not yet implemented...");
	}
}

// Enables or disables all footer buttons on all SimpleWindows in the current page.
// This should be called with |false| when the button(s) become irrelevant (e.g. just before Status.init is called).
// This is not an instance method so that consumers don't have to keep a reference to the original
// SimpleWindow object sitting around somewhere. Anyway, most of the time there will only be one
// SimpleWindow open, so this shouldn't matter.
SimpleWindow.setButtonsEnabled = function( enabled ) {
	$(".morebits-dialog-buttons button").attr("disabled", !enabled);
};


// Blacklist was removed per consensus at http://en.wikipedia.org/wiki/Wikipedia:Administrators%27_noticeboard/Archive221#New_Twinkle_blacklist_proposal

// Twinkle initialization

twAddPortlet.usingTwCfg = (typeof(TwinkleConfig) !== "undefined");
if (skin === 'vector') {
	twAddPortlet.portletArea = (twAddPortlet.usingTwCfg && TwinkleConfig.portletArea ? TwinkleConfig.portletArea : 'right-navigation');
	twAddPortlet.portletId = (twAddPortlet.usingTwCfg && TwinkleConfig.portletId ? TwinkleConfig.portletId : 'p-twinkle');
	twAddPortlet.portletName = (twAddPortlet.usingTwCfg && TwinkleConfig.portletName ? TwinkleConfig.portletName : 'TW');
	twAddPortlet.portletType = (twAddPortlet.usingTwCfg && TwinkleConfig.portletType ? TwinkleConfig.portletType : 'menu');
	twAddPortlet.portletNext = (twAddPortlet.usingTwCfg && TwinkleConfig.portletNext ? TwinkleConfig.portletNext : 'p-search');
} else {
	twAddPortlet.portletId = (twAddPortlet.usingTwCfg && TwinkleConfig.portletId ? TwinkleConfig.portletId : 'p-cactions');
}

// check if account is experienced enough for more advanced functions
// don't use the Twinkle object because other scripts may import this
var twinkleUserAuthorized = userIsInGroup( 'autoconfirmed' ) || userIsInGroup( 'confirmed' );

// flag to let script loaders know that this module has already been loaded
var morebits_js_loaded = true;  // legacy version
var morebits_v2_js_loaded = true;  // version enhanced for HTML5