//** Animated Collapsible DIV v2.0- (c) Dynamic Drive DHTML code library: http://www.dynamicdrive.com.
//** May 24th, 08'- Script rewritten and updated to 2.0.
//** June 4th, 08'- Version 2.01: Bug fix to work with jquery 1.2.6 (which changed the way attr() behaves).
//** March 5th, 09'- Version 2.2, which adds the following:
//1) ontoggle($, divobj, state) event that fires each time a DIV is expanded/collapsed, including when the page 1st loads
//2) Ability to expand a DIV via a URL parameter string, ie: index.htm?expanddiv=jason or index.htm?expanddiv=jason,kelly

//** March 9th, 09'- Version 2.2.1: Optimized ontoggle event handler slightly.
//** July 3rd, 09'- Version 2.4, which adds the following:
//1) You can now insert rel="expand[divid] | collapse[divid] | toggle[divid]" inside arbitrary links to act as DIV togglers
//2) For image toggler links, you can insert the attributes "data-openimage" and "data-closedimage" to update its image based on the DIV state

var acNewsControl = {
	divholders: {}, //structure: {div.id, div.attrs, div.$divref, div.$togglerimage}
	divgroups: {}, //structure: {groupname.count, groupname.lastactivedivid}
	lastactiveingroup: {}, //structure: {lastactivediv.id}
	preloadimages: [],
	lastdivTitleUnderlineID: '',
	show: function(divids) { //public method
		if (typeof divids == "object") {
			for (var i = 0; i < divids.length; i++)
				this.showhide(divids[i], "show")
		}
		else
			this.showhide(divids, "show")
	},

	hide: function(divids) { //public method
		if (typeof divids == "object") {
			for (var i = 0; i < divids.length; i++)
				this.showhide(divids[i], "hide")
		}
		else
			this.showhide(divids, "hide")
	},

	toggle: function(divid, divTitleUnderlineID) { //public method
		if (typeof divid == "object")
			divid = divid[0]
		if (typeof divTitleUnderlineID == "object")
			divTitleUnderlineID = divTitleUnderlineID[0]

		this.showhide(divid, "toggle", divTitleUnderlineID)
	},

	addDiv: function(divid, attrstring) { //public function
		this.divholders[divid] = ({ id: divid, $divref: null, attrs: attrstring })
		this.divholders[divid].getAttr = function(name) { //assign getAttr() function to each divholder object
			var attr = new RegExp(name + "=([^,]+)", "i") //get name/value config pair (ie: width=400px,)
			return (attr.test(this.attrs) && parseInt(RegExp.$1) != 0) ? RegExp.$1 : null //return value portion (string), or 0 (false) if none found
		}
		this.currentid = divid //keep track of current div object being manipulated (in the event of chaining)
		return this
	},

	showhide: function(divid, action, divTitleUnderlineID) {

		var $divref = this.divholders[divid].$divref //reference collapsible DIV
		if (this.divholders[divid] && $divref.length == 1) { //if DIV exists
			var targetgroup = this.divgroups[$divref.attr('groupname')] //find out which group DIV belongs to (if any)
			if ($divref.attr('groupname') && targetgroup.count > 1 && (action == "show" || action == "toggle" && $divref.css('display') == 'none')) { //If current DIV belongs to a group
				if (targetgroup.lastactivedivid && targetgroup.lastactivedivid != divid) //if last active DIV is set
				{
					if (this.lastdivTitleUnderlineID)
						document.getElementById(this.lastdivTitleUnderlineID).style.borderBottom = "";
					this.slideengine(targetgroup.lastactivedivid, 'hide') //hide last active DIV within group first
				}
				this.slideengine(divid, 'show')
				document.getElementById(divTitleUnderlineID).style.borderBottom = "#004c93 1px solid";
				targetgroup.lastactivedivid = divid //remember last active DIV
				this.lastdivTitleUnderlineID = divTitleUnderlineID;
			}
			else {
				this.slideengine(divid, action)
			}
		}
	},

	slideengine: function(divid, action) {
		var $divref = this.divholders[divid].$divref
		var $togglerimage = this.divholders[divid].$togglerimage
		if (this.divholders[divid] && $divref.length == 1) { //if this DIV exists
			var animateSetting = { height: action }
			if ($divref.attr('fade'))
				animateSetting.opacity = action
			$divref.animate(animateSetting, $divref.attr('speed') ? parseInt($divref.attr('speed')) : 500, function() {
				if ($togglerimage) {
					$togglerimage.attr('src', ($divref.css('display') == "none") ? $togglerimage.data('srcs').closed : $togglerimage.data('srcs').open)
				}
				if (acNewsControl.ontoggle) {
					try {
						acNewsControl.ontoggle(jQuery, $divref.get(0), $divref.css('display'))
					}
					catch (e) {
						alert("An error exists inside your \"ontoggle\" function:\n\n" + e + "\n\nAborting execution of function.")
					}
				}
			})
			return false
		}
	},

	generatemap: function() {
		var map = {}
		for (var i = 0; i < arguments.length; i++) {
			if (arguments[i][1] != null) { //do not generate name/value pair if value is null
				map[arguments[i][0]] = arguments[i][1]
			}
		}
		return map
	},

	init: function() {
		var ac = this
		jQuery(document).ready(function($) {
			acNewsControl.ontoggle = acNewsControl.ontoggle || null
			var urlparamopenids = acNewsControl.urlparamselect() //Get div ids that should be expanded based on the url (['div1','div2',etc])
			var persistopenids = ac.getCookie('acopendivids') //Get list of div ids that should be expanded due to persistence ('div1,div2,etc')
			var groupswithpersist = ac.getCookie('acgroupswithpersist') //Get list of group names that have 1 or more divs with "persist" attribute defined
			if (persistopenids != null) //if cookie isn't null (is null if first time page loads, and cookie hasnt been set yet)
				persistopenids = (persistopenids == 'nada') ? [] : persistopenids.split(',') //if no divs are persisted, set to empty array, else, array of div ids
			groupswithpersist = (groupswithpersist == null || groupswithpersist == 'nada') ? [] : groupswithpersist.split(',') //Get list of groups with divs that are persisted
			jQuery.each(ac.divholders, function() { //loop through each collapsible DIV object
				this.$divref = $('#' + this.id)
				if ((this.getAttr('persist') || jQuery.inArray(this.getAttr('group'), groupswithpersist) != -1) && persistopenids != null) { //if this div carries a user "persist" setting, or belong to a group with at least one div that does
					var cssdisplay = (jQuery.inArray(this.id, persistopenids) != -1) ? 'block' : 'none'
				}
				else {
					var cssdisplay = this.getAttr('hide') ? 'none' : null
				}
				if (urlparamopenids[0] == "all" || jQuery.inArray(this.id, urlparamopenids) != -1) { //if url parameter string contains the single array element "all", or this div's ID
					cssdisplay = 'block' //set div to "block", overriding any other setting
				}
				else if (urlparamopenids[0] == "none") {
					cssdisplay = 'none' //set div to "none", overriding any other setting
				}
				this.$divref.css(ac.generatemap(['height', this.getAttr('height')], ['display', cssdisplay]))
				this.$divref.attr(ac.generatemap(['groupname', this.getAttr('group')], ['fade', this.getAttr('fade')], ['speed', this.getAttr('speed')]))
				if (this.getAttr('group')) { //if this DIV has the "group" attr defined
					var targetgroup = ac.divgroups[this.getAttr('group')] || (ac.divgroups[this.getAttr('group')] = {}) //Get settings for this group, or if it no settings exist yet, create blank object to store them in
					targetgroup.count = (targetgroup.count || 0) + 1 //count # of DIVs within this group
					if (jQuery.inArray(this.id, urlparamopenids) != -1) { //if url parameter string contains this div's ID
						targetgroup.lastactivedivid = this.id //remember this DIV as the last "active" DIV (this DIV will be expanded). Overrides other settings
						targetgroup.overridepersist = 1 //Indicate to override persisted div that would have been expanded
					}
					if (!targetgroup.lastactivedivid && this.$divref.css('display') != 'none' || cssdisplay == "block" && typeof targetgroup.overridepersist == "undefined") //if this DIV was open by default or should be open due to persistence								
						targetgroup.lastactivedivid = this.id //remember this DIV as the last "active" DIV (this DIV will be expanded)
					this.$divref.css({ display: 'none' }) //hide any DIV that's part of said group for now
				}
			}) //end divholders.each
			jQuery.each(ac.divgroups, function() { //loop through each group
				if (this.lastactivedivid && urlparamopenids[0] != "none") //show last "active" DIV within each group (one that should be expanded), unless url param="none"
					ac.divholders[this.lastactivedivid].$divref.show()
			})
			if (acNewsControl.ontoggle) {
				jQuery.each(ac.divholders, function() { //loop through each collapsible DIV object and fire ontoggle event
					acNewsControl.ontoggle(jQuery, this.$divref.get(0), this.$divref.css('display'))
				})
			}
			//Parse page for links containing rel attribute
			var $allcontrols = $('a[rel]').filter('[rel^="collapse["], [rel^="expand["], [rel^="toggle["]') //get all elements on page with rel="collapse[]", "expand[]" and "toggle[]"
			$allcontrols.each(function() { //loop though each control link
				this._divids = this.getAttribute('rel').replace(/(^\w+)|(\s+)/g, "").replace(/[\[\]']/g, "") //cache value 'div1,div2,etc' within identifier[div1,div2,etc]
				if (this.getElementsByTagName('img').length == 1 && ac.divholders[this._divids]) { //if control is an image link that toggles a single DIV (must be one to one to update status image)
					acNewsControl.preloadimage(this.getAttribute('data-openimage'), this.getAttribute('data-closedimage')) //preload control images (if defined)
					$togglerimage = $(this).find('img').eq(0).data('srcs', { open: this.getAttribute('data-openimage'), closed: this.getAttribute('data-closedimage') }) //remember open and closed images' paths
					ac.divholders[this._divids].$togglerimage = $(this).find('img').eq(0) //save reference to toggler image (to be updated inside slideengine()
					ac.divholders[this._divids].$togglerimage.attr('src', (ac.divholders[this._divids].$divref.css('display') == "none") ? $togglerimage.data('srcs').closed : $togglerimage.data('srcs').open)
				}
				$(this).click(function() { //assign click behavior to each control link
					var relattr = this.getAttribute('rel')
					var divids = (this._divids == "") ? [] : this._divids.split(',') //convert 'div1,div2,etc' to array 
					if (divids.length > 0) {
						acNewsControl[/expand/i.test(relattr) ? 'show' : /collapse/i.test(relattr) ? 'hide' : 'toggle'](divids) //call corresponding public function
						return false
					}
				}) //end control.click
			})// end control.each

			$(window).bind('unload', function() {
				ac.uninit()
			})
		}) //end doc.ready()
	},

	uninit: function() {
		var opendivids = '', groupswithpersist = ''
		jQuery.each(this.divholders, function() {
			if (this.$divref.css('display') != 'none') {
				opendivids += this.id + ',' //store ids of DIVs that are expanded when page unloads: 'div1,div2,etc'
			}
			if (this.getAttr('group') && this.getAttr('persist'))
				groupswithpersist += this.getAttr('group') + ',' //store groups with which at least one DIV has persistance enabled: 'group1,group2,etc'
		})
		opendivids = (opendivids == '') ? 'nada' : opendivids.replace(/,$/, '')
		groupswithpersist = (groupswithpersist == '') ? 'nada' : groupswithpersist.replace(/,$/, '')
		this.setCookie('acopendivids', opendivids)
		this.setCookie('acgroupswithpersist', groupswithpersist)
	},

	getCookie: function(Name) {
		var re = new RegExp(Name + "=[^;]*", "i"); //construct RE to search for target name/value pair
		if (document.cookie.match(re)) //if cookie found
			return document.cookie.match(re)[0].split("=")[1] //return its value
		return null
	},

	setCookie: function(name, value, days) {
		if (typeof days != "undefined") { //if set persistent cookie
			var expireDate = new Date()
			expireDate.setDate(expireDate.getDate() + days)
			document.cookie = name + "=" + value + "; path=/; expires=" + expireDate.toGMTString()
		}
		else //else if this is a session only cookie
			document.cookie = name + "=" + value + "; path=/"
	},

	urlparamselect: function() {
		window.location.search.match(/expanddiv=([\w\-_,]+)/i) //search for expanddiv=divid or divid1,divid2,etc
		return (RegExp.$1 != "") ? RegExp.$1.split(",") : []
	},

	preloadimage: function() {
		var preloadimages = this.preloadimages
		for (var i = 0; i < arguments.length; i++) {
			if (arguments[i] && arguments[i].length > 0) {
				preloadimages[preloadimages.length] = new Image()
				preloadimages[preloadimages.length - 1].src = arguments[i]
			}
		}
	},

	setLastdivTitleUnderLine: function(lastDivTitleUnderLine) {	
		if (this.lastdivTitleUnderlineID == "")
			this.lastdivTitleUnderlineID = lastDivTitleUnderLine;
	}

}