/*
Collapsible nav 0.1.0 - plugin for collapsing navigation and remembering the closed/open state
http://scottdarby.com/

Copyright (c) 2009 Scott Darby

Requires: jQuery 1.3
jquery.cookie plugin by Klaus Hartl

Licensed under the GPL license:
http://www.gnu.org/licenses/gpl.html
*/

jQuery.fn.collapsibleNav = function(options) {
    
    var defaults = {
    hideByDefault: '', //ids of elements you want hidden by default
        
        clickController: 'h2.colapsaurLink', //your heading elements
        slideSpeed: 150 //speed of animation
    };

    //initial variables
    var opts = jQuery.extend(defaults, options),
		$list = jQuery(this),
		$heading = $list.find(opts.clickController),
		$listItems = $list.children(),
		closedItems;

    //function that is called when slidable is clicked
    function updateArray(e) {
        //get id of element for adding to array
        var eId = jQuery(e).attr('id');

        //look for element in cookie array
        var arrPos = jQuery.inArray(eId, closedItems);

        if (arrPos == -1) {
            //element not in array, add element
            closedItems.push(eId);
        } else {
            //element in array, remove element
            closedItems.splice(arrPos, 1);
        }
        //update cookie
        jQuery.cookie('closedItems', closedItems, { path: '/', expires: 365 });
    }

    //remember closed/open state of nav items
    if (jQuery.cookie) {

        /*
        if no cookie called "closedItems" exists, then create one with
        elements you want hidden by default.
        '1' is given as first value to prevent cookie from being 
        deleted if it contains no ids
        */

        if (!jQuery.cookie('closedItems')) {
            jQuery.cookie('closedItems', '1,' + opts.hideByDefault, { path: '/', expires: 365 });
        }

        //if cookie exists
        if (jQuery.cookie('closedItems')) {

            //split cookie into array
            closedItems = jQuery.cookie('closedItems').split(',');
            //iterate through array and apply closed class to each element within it
            for (var i = 0; i < closedItems.length; ++i) {
                jQuery('#' + closedItems[i]).addClass('closed');
            }
            //hide content underneath each element that has a class of closed
            jQuery('.closed').children("div.colapsaur").hide();
        }
    }

    $heading.toggleClass('activeBar');

    $heading.click(function() {

        var $target = jQuery(this),
			$parent = $target.parent();

        //toggle closed class
        $parent.toggleClass('closed');

        //slidey stuff
        $target.next().slideToggle(opts.slideSpeed);

        //update cookie with current li
        updateArray($parent);

        return false;

    });

    return this;

};