//** 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 animatedcollapse={
    divholders: {}, //structure: {div.id, div.attrs, div.$divref, div.$togglerimage}
    divgroups: {}, //structure: {groupname.count, groupname.lastactivedivid}
    lastactiveingroup: {}, //structure: {lastactivediv.id}
    preloadimages: [],

    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){ //public method
        if (typeof divid=="object")
            divid=divid[0]
        this.showhide(divid, "toggle")
    },

    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){
        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
                //                    this.slideengine(targetgroup.lastactivedivid, 'hide') //hide last active DIV within group first
                this.slideengine(divid, 'show')
                targetgroup.lastactivedivid=divid //remember last active DIV
            }
            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 (animatedcollapse.ontoggle){
                    try{
                        animatedcollapse.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($){
            animatedcollapse.ontoggle=animatedcollapse.ontoggle || null
            var urlparamopenids=animatedcollapse.urlparamselect() //Get div ids that should be expanded based on the url (['div1','div2',etc])
            var persistopenids=ac.getCookie('acopendivids') //Get list of div ids that should be expanded due to persistence ('div1,div2,etc')
            var groupswithpersist=ac.getCookie('acgroupswithpersist') //Get list of group names that have 1 or more divs with "persist" attribute defined
            if (persistopenids!=null) //if cookie isn't null (is null if first time page loads, and cookie hasnt been set yet)
                persistopenids=(persistopenids=='nada')? [] : persistopenids.split(',') //if no divs are persisted, set to empty array, else, array of div ids
            groupswithpersist=(groupswithpersist==null || groupswithpersist=='nada')? [] : groupswithpersist.split(',') //Get list of groups with divs that are persisted
            jQuery.each(ac.divholders, function(){ //loop through each collapsible DIV object
                this.$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 (animatedcollapse.ontoggle){
                jQuery.each(ac.divholders, function(){ //loop through each collapsible DIV object and fire ontoggle event
                    animatedcollapse.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)
                    animatedcollapse.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){
                        animatedcollapse[/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]
            }
        }
    }

}