/**
	* Find MP3 links on page and add WordPress Audio Player 
	*/

    function WPAPlayer()
    {
    	// Required Flash version
        this.flashVersion = '9.0.0';
        
        // Player counter for uniqueness
        this.playerNumber = 1;
        
        // Class name to add to player wrapper
        this.wrapperClass = 'wpaplayer_mp3';
    }
    
    
    
    WPAPlayer.prototype = {
        
    	
       /**
        * Add WordPress Audio Player to all elements on page matching selector
        * @param string selector css selector to match, eg. a.mp3
        */
        addPlayersBySelector:function(selector)
        {
        	// Get links
            var links = this.getElementsBySelector(selector);
            
            for (var i = 0, n = links.length; i < n; ++i)
            {
                // Skip if player already present
                if (this.hasClass(links[i].parentNode, this.wrapperClass))
                    continue;
                
                // Skip all but mp3 links
                if (links[i].href.substr(links[i].href.length - 4) != '.mp3')
                    continue;
                
                // Add player
                this.addPlayerToElement(links[i]);
            }	
        },
        
        
       /**
        * Add WordPress Audio Player to given element
        * @param object element DOM element to add player to, usually a link 
        */
        addPlayerToElement:function(element)
        {
        	// Unique container id
        	var id = 'WPAudio-' + this.playerNumber;
        	
            // Create container div
            var playerWrapper = document.createElement('div');
            this.addClass(playerWrapper, this.wrapperClass);
            
            // Add empty span which is replaced by Flash object
            var flash = document.createElement('span');
            flash.setAttribute('id', id);
            playerWrapper.appendChild(flash);
            
            // Insert player container
            element.parentNode.insertBefore(playerWrapper, element.nextSibling);
            
            // Add script tag
            var script = document.createElement('script');
            script.type = 'text/javascript';
            var scriptContent = 'AudioPlayer.embed("' + id + '",{soundFile:"' + element.href + '"});'
            
            try
            {
                script.appendChild(document.createTextNode(scriptContent));      
            } catch(e)
            {
                script.text = scriptContent;
            }
            playerWrapper.appendChild(script);
            
            // Increment player counter
            ++this.playerNumber;
        },
        
        
       /**
        * Get DOM elements based on the given CSS Selector - V 1.00.A Beta
        * http://www.openjs.com/scripts/dom/css_selector/
        */
        getElementsBySelector:function(all_selectors)
        {
            var selected = new Array();
            if(!document.getElementsByTagName) return selected;
            all_selectors = all_selectors.replace(/\s*([^\w])\s*/g,"$1");//Remove the 'beutification' spaces
            var selectors = all_selectors.split(",");
            // Grab all of the tagName elements within current context	
            var getElements = function(context,tag) {
                if (!tag) tag = '*';
                // Get elements matching tag, filter them for class selector
                var found = new Array;
                for (var a=0,len=context.length; con=context[a],a<len; a++) {
                    var eles;
                    if (tag == '*') eles = con.all ? con.all : con.getElementsByTagName("*");
                    else eles = con.getElementsByTagName(tag);
        
                    for(var b=0,leng=eles.length;b<leng; b++) found.push(eles[b]);
                }
                return found;
            }
        
            COMMA:
            for(var i=0,len1=selectors.length; selector=selectors[i],i<len1; i++) {
                var context = new Array(document);
                var inheriters = selector.split(" ");
        
                SPACE:
                for(var j=0,len2=inheriters.length; element=inheriters[j],j<len2;j++) {
                    //This part is to make sure that it is not part of a CSS3 Selector
                    var left_bracket = element.indexOf("[");
                    var right_bracket = element.indexOf("]");
                    var pos = element.indexOf("#");//ID
                    if(pos+1 && !(pos>left_bracket&&pos<right_bracket)) {
                        var parts = element.split("#");
                        var tag = parts[0];
                        var id = parts[1];
                        var ele = document.getElementById(id);
                        if(!ele || (tag && ele.nodeName.toLowerCase() != tag)) { //Specified element not found
                            continue COMMA;
                        }
                        context = new Array(ele);
                        continue SPACE;
                    }
        
                    pos = element.indexOf(".");//Class
                    if(pos+1 && !(pos>left_bracket&&pos<right_bracket)) {
                        var parts = element.split('.');
                        var tag = parts[0];
                        var class_name = parts[1];
        
                        var found = getElements(context,tag);
                        context = new Array;
                        for (var l=0,len=found.length; fnd=found[l],l<len; l++) {
                            if(fnd.className && fnd.className.match(new RegExp('(^|\s)'+class_name+'(\s|$)'))) context.push(fnd);
                        }
                        continue SPACE;
                    }
        
                    if(element.indexOf('[')+1) {//If the char '[' appears, that means it needs CSS 3 parsing
                        // Code to deal with attribute selectors
                        if (element.match(/^(\w*)\[(\w+)([=~\|\^\$\*]?)=?['"]?([^\]'"]*)['"]?\]$/)) {
                            var tag = RegExp.$1;
                            var attr = RegExp.$2;
                            var operator = RegExp.$3;
                            var value = RegExp.$4;
                        }
                        var found = getElements(context,tag);
                        context = new Array;
                        for (var l=0,len=found.length; fnd=found[l],l<len; l++) {
                            if(operator=='=' && fnd.getAttribute(attr) != value) continue;
                            if(operator=='~' && !fnd.getAttribute(attr).match(new RegExp('(^|\\s)'+value+'(\\s|$)'))) continue;
                            if(operator=='|' && !fnd.getAttribute(attr).match(new RegExp('^'+value+'-?'))) continue;
                            if(operator=='^' && fnd.getAttribute(attr).indexOf(value)!=0) continue;
                            if(operator=='$' && fnd.getAttribute(attr).lastIndexOf(value)!=(fnd.getAttribute(attr).length-value.length)) continue;
                            if(operator=='*' && !(fnd.getAttribute(attr).indexOf(value)+1)) continue;
                            else if(!fnd.getAttribute(attr)) continue;
                            context.push(fnd);
                        }
        
                        continue SPACE;
                    }
        
                    //Tag selectors - no class or id specified.
                    var found = getElements(context,element);
                    context = found;
                }
                for (var o=0,len=context.length;o<len; o++) selected.push(context[o]);
            }
            return selected;
        },
        
        
       /**
        * Load player
        * @param function func onload function
        */
        load:function(func)
	    {
	        var oldonload = window.onload;
	        
	        if (typeof window.onload != 'function')
        	    window.onload = func;
            else
	        {
	            window.onload = function()
	            {
	                if (oldonload)
	                    oldonload();
	                
	                func();
	            }
	        }
	    },
	    
	    
	   /**
	    * Add class name to DOM element
	    * @param object elem DOM element to manipulate
	    * @param string cls class name to add
	    */
	    addClass:function(elem, cls)
	    {
		    if (!this.hasClass(elem, cls))
		        elem.className += " " + cls;
	    },
	    
	    
	   /**
	    * Check whether DOM element has given class name
	    * @param object elem DOM element to check
	    * @param string cls class name to look for
	    * @return bool true if element has class name, otherwise false 
	    */
	    hasClass:function(elem, cls)
        {
		    return elem.className.match(new RegExp('(\\s|^)' + cls + '(\\s|$)'));
	    },
	    
	    
	   /**
	    * Remove class name from DOM element
	    * @param object elem DOM element to manipulate
	    * @param string cls class name to remove
	    */
	    removeClass:function(elem, cls)
	    {
		    if (hasClass(elem, cls))
		    {
			    var reg = new RegExp('(\\s|^)' + cls + '(\\s|$)');
    			elem.className = ele.className.replace(reg, ' ')
	    	}
	    }
    };