/*
Plugin Name: Anyfeed Slideshow
Plugin URI: http://tixen.net/anyfeed-slideshow/
Description: A quick and easy jQuery based slideshow widget, fed from absolutely any XML/RSS/ATOM feed that contains images!
Version: 1.0.1
Author: Soleil Golden
Author URI: http://tixen.net/
License: GPL 2.0

	Copyright 2010,  Soleil Golden  (email : soleil@tixen.net)
	
	This program is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License, version 2, as 
	published by the Free Software Foundation.
	
	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU General Public License for more details.
	
	You should have received a copy of the GNU General Public License
	along with this program; if not, write to the Free Software
	Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/

function anyfeed_slideshow(options) {
/*------------------------ Configuration Options -----------------------*/
// Please change these using the call object! :)

// Length of time to pause between photos
if(typeof options.pause_rate == 'undefined') {var pause_rate = 5000;}
else{var pause_rate = options.pause_rate;}

// Speed of the fade between photos
if(typeof options.fade_rate == 'undefined') {var fade_rate = 1000;}
else{var fade_rate = options.fade_rate;}
	
// Text displayed when Loading
if(typeof options.loading_text == 'undefined') {var loading_text = 'Loading...';}
else{var loading_text = options.loading_text;}
	
// Type of image to display - thumbnail only available when exists in feed
if(typeof options.media_type == 'undefined') {var media_type = 'content';} // Valid Options:  content, thumbnail
else{var media_type = options.media_type;}	
	
// The container to be replaced with the slideshow
if(typeof options.container == 'undefined') {var container = "#anyfeed_slideshow_main";}
else{var container = options.container;}	
	
// The url to the xml file
if(typeof options.xml_url == 'undefined') {var xml_url = "temp.xml";}
else{var xml_url = options.xml_url;}
	
// The width
if(typeof options.c_width == 'undefined') {var c_width = "100%";}
else{var c_width = options.c_width;}
	
// The height
if(typeof options.c_height == 'undefined') {var c_height = "200px";}
else{var c_height = options.c_height;}

// Turn on or off Navigation arrows
if(typeof options.navigation == 'undefined') {var navigation = true;}
else{var navigation = options.navigation;}

// Turn on or off Titlebar
if(typeof options.title_bar == 'undefined') {var title_bar = true;}
else{var title_bar = options.title_bar;}

// Background Color
if(typeof options.bgcolor == 'undefined') {var bgcolor = 'transparent';}
else{var bgcolor = options.bgcolor;}

// Turn on or off Debugging
if(typeof options.debug == 'undefined') {var debug = false;}
else{var debug = options.debug;}
/*----------------------------------------------------------------------*/


	
/*--------------------------- Global Variables -------------------------*/
/*  Please don't change these (unless you know what you're doing). */
// Set Variables
	var total = 0;
	var loaded = 0;
	var slideshow_handle;
	var loading_handle;
	var slide_i = -1;
	var started = false;
	
// Functions
	this.start = start;
	this.init = init;
	this.next = next;
	this.prev = prev;
	this.loading_start = loading_start;
	this.loading_stop = loading_stop;
	this.test = test;
/*----------------------------------------------------------------------*/
	
	function init() {
		
		// Set width and height
		jQuery(container).css({width: c_width, height: c_height});
		
		loading_start();
		if(debug) console.group("Parsing XML");
		jQuery.ajax({
			type: "GET",
			url: xml_url,
			dataType: "xml",
			timeout: 5000,
			success: function(xml) {
				if(navigation) { jQuery(container).html(jQuery(container).html()+'<div class="anyfeed_navigation anyfeed_slide_next" onclick="anyfeed.next();"></div><div class="anyfeed_navigation anyfeed_slide_prev" onclick="anyfeed.prev();"></div>'); }
				var counter = 0;
				var media;
				jQuery(xml).find('rss').each(function(){ if(jQuery(this).attr('xmlns:media')){media = true;} else{media = false;} });
				if(media){ 
// Media feed (Flikr, Yahoo, etc)
					jQuery(xml).find('item').each(function(){
						var title = jQuery(this).find('title').text();
						var link = jQuery(this).find('link').text();
						jQuery(this).find('media\\:'+media_type).each(function(){

		
							var url = jQuery(this).attr('url');
							if(debug) console.log(url);
							if(url == null || url === "" || url == undefined) { if(debug) console.log("Skipped."); }
							else{
								var i1 = new Image();
								i1.onload = function() {
									loaded = loaded + 1;
									if(loaded >= counter){ 
										total = counter -1;
										loading_stop(pause_rate + fade_rate);
										start();
									}
								};
								
								i1.src = url;
								if(title_bar){ var titlebar='<div class="anyfeed_titlebar">'+title+'</div>';} else{ var titlebar = ''; }
								jQuery(container).html(jQuery(container).html()+'<div class="anyfeed_photo" id="anyfeed_photo_'+counter+'" style="background-image: url(\''+url+'\'); background-color: '+bgcolor+';" onclick="window.open(\''+link+'\', \'_blank\');">'+titlebar+'</div>');												
								counter = counter + 1;
								if(debug) console.log("Added.");
							} 
						});
					});
				} else { 
// Regular RSS Feed	(prep)				
					jQuery(xml).find('item').each(function(){
						var tmpcounter = 0;
						var title = jQuery(this).find('title').text();
						var link = jQuery(this).find('link').text();
						if(debug) console.group("Title: " + title);
							
// Regular RSS Feed
						if(debug) console.log("Attempting to find image attachments");
						jQuery(this).find('enclosure').each(function(){ 
							if(debug) console.info("Feed with image attachments");
							tmpcounter += 1;
		
							var url = jQuery(this).attr('url');
							if(debug) console.log(url);
							if(url == null || url === "" || url == undefined) { if(debug) console.log("Skipped."); }
							else{
								var i1 = new Image();
								i1.onload = function() {
									if(debug) console.info("Loading... %a / %b", counter, loaded + 1);
									loaded = loaded + 1;
									if(loaded >= counter){ 
										total = counter -1;
										loading_stop(pause_rate + fade_rate);
										start();
									}
								};
								i1.src = url;
								if(title_bar){ var titlebar='<div class="anyfeed_titlebar">'+title+'</div>';} else{ var titlebar = ''; }
								jQuery(container).html(jQuery(container).html()+'<div class="anyfeed_photo" id="anyfeed_photo_'+counter+'" style="background-image: url(\''+url+'\'); background-color: '+bgcolor+';" onclick="window.open(\''+link+'\', \'_blank\');">'+titlebar+'</div>');					
								counter = counter + 1;
								if(debug) console.log("Added.");
							}
						});
						

// Feed without image attachments
						if(tmpcounter == 0) { 
							if(debug) console.log("Attempting to find XML Content:encoded...");
							var fish = jQuery(this).find('content\\:encoded').text();
							if(fish) {
								var url = jQuery(fish).find('img').attr('src');
							if(url == null || url === "" || url == undefined) { if(debug) console.log("Skipped."); }
								else{
									if(debug) console.info("Feed without image attachments");
									if(debug) console.log("URL: " + url);
									tmpcounter += 1;
									var i1 = new Image();
									i1.onload = function() {
										if(debug) console.info("Loading... %a / %b", counter, loaded + 1);
										loaded = loaded + 1;
										if(loaded >= counter){ 
											total = counter -1;
											loading_stop(pause_rate + fade_rate);
											start();									
										}
									};
									i1.src = url;
									if(title_bar){ var titlebar='<div class="anyfeed_titlebar">'+title+'</div>';} else{ var titlebar = ''; }
									jQuery(container).html(jQuery(container).html()+'<div class="anyfeed_photo" id="anyfeed_photo_'+counter+'" style="background-image: url(\''+url+'\'); background-color: '+bgcolor+';" onclick="window.open(\''+link+'\', \'_blank\');">'+titlebar+'</div>');
									counter = counter + 1;
									if(debug) console.log("Added.");
								}
							} // end check fish for content
						} // End feed without image attachments
						
// Feed without Content, only descriptions
						if(tmpcounter == 0) { 
							if(debug) console.log("Attempting to find images in description text...");
							var fish = jQuery(this).find('description').text();
							var re = new RegExp("/(<img )/", "i");
							var m = re.exec(url);
							if(m!=null) { 
								var url = jQuery(fish).find('img').attr('src');
								var re = new RegExp("/(.*feedburner.*|.*ads\..*)/", "i");
								var m = re.exec(url);
								if(debug) console.log("Regex Test: " + m);
								if (m==null && url!=undefined) {
								if(debug) console.info("Feed without content ");
								if(debug) console.log("URL: " + url);
									tmpcounter + 1;
									var i1 = new Image();
									i1.onload = function() {
										if(debug) console.info("Loading... %a / %b", counter, loaded + 1);
										loaded = loaded + 1;
										if(loaded >= counter){ 
											total = counter -1;
											loading_stop(pause_rate + fade_rate);
											start();									
										}
									};
									i1.src = url;
									if(title_bar){ var titlebar='<div class="anyfeed_titlebar">'+title+'</div>';} else{ var titlebar = ''; }
									jQuery(container).html(jQuery(container).html()+'<div class="anyfeed_photo" id="anyfeed_photo_'+counter+'" style="background-image: url(\''+url+'\'); background-color: '+bgcolor+';" onclick="window.open(\''+link+'\', \'_blank\');">'+titlebar+'</div>');
	
									if(debug) console.log("%a Added.", counter);
									counter = counter + 1;
								}  else { if(debug) console.log("skipped."); }
							}  else { if(debug) console.log("Nothing here! Skipping."); }
							
						} // End feed without content
						
					if(debug) console.groupEnd();
						
					});
				}

				if(counter == 0) {return false;}
				jQuery(container).hover(
					function() { 
						if(started){
							jQuery("div.anyfeed_titlebar").fadeIn(fade_rate / 5);
							if(total > 0)jQuery("div.anyfeed_navigation").fadeIn(fade_rate / 5);
							setTimeout(function() {jQuery("div.anyfeed_titlebar").css({display: "block"});},fade_rate / 3);
							if(total > 0)setTimeout(function() {jQuery("div.anyfeed_navigation").css({display: "block"});},fade_rate / 3);
						}
						clearTimeout(slideshow_handle); 
					}, function () { 
						if(started){
							jQuery("div.anyfeed_titlebar").fadeOut(fade_rate / 2);
							if(total > 0) jQuery("div.anyfeed_navigation").fadeOut(fade_rate / 2);
							setTimeout(function() {jQuery("div.anyfeed_titlebar").css({display: "none"});},fade_rate / 2);
						}
						start();
					}
				);
			
	if(debug) console.groupEnd();
	if(debug) console.group("Loading Images...");
	
			},
			error: function() {
				if(debug){jQuery(container).html("Failed to retreive XML file."); }
			}
		});
	}
	
	
	function start() {
		if(debug) console.groupEnd();
		if(total==0){ 
			loading_stop(1);
			jQuery("#anyfeed_photo_0").fadeIn(fade_rate);
			return false;
		}
		slideshow_handle = setInterval(function() {
			if(slide_i >= total){
				var fadethis="#anyfeed_photo_"+(total);
				slide_i = 0; 
			} else { 
				var fadethis = "#anyfeed_photo_"+(slide_i);
				slide_i = slide_i + 1;
			}	
			setTimeout(function(){
				jQuery(fadethis).fadeOut(fade_rate);
			}, fade_rate / 2);
			jQuery("#anyfeed_photo_"+slide_i).fadeIn(fade_rate);
		}, pause_rate + fade_rate);
	}
	
	function next(){
			if(slide_i >= total){
				var fadethis="#anyfeed_photo_"+(total);  
				slide_i = 0; 
			} else { 
				var fadethis="#anyfeed_photo_"+(slide_i);
				slide_i = slide_i + 1;
			}
		setTimeout(function(){
			jQuery(fadethis).fadeOut(fade_rate / 3);
		}, fade_rate / 6);
		jQuery("#anyfeed_photo_"+slide_i).fadeIn(fade_rate / 3);
	}	
	
	function prev(){
		if(slide_i <= 0){
			var fadethis="#anyfeed_photo_0"; 
			slide_i = total; 
		}else {
			var fadethis="#anyfeed_photo_"+slide_i;
			slide_i = slide_i - 1;
		}
		setTimeout(function(){
			jQuery(fadethis).fadeOut(fade_rate / 3);
		}, fade_rate / 6);
		jQuery("#anyfeed_photo_"+slide_i).fadeIn(fade_rate / 3);
	}

	function loading_start() {
		jQuery(container).html('<div id="anyfeed_slideshow_loading">'+loading_text+'</div>');
		jQuery('#anyfeed_slideshow_loading').css({opacity: 0.1});
		loading_handle = setInterval(function() {
			jQuery("#anyfeed_slideshow_loading").animate( { opacity: 0.5	}, 1400, function() {
				jQuery("#anyfeed_slideshow_loading").animate( { opacity: 0.1	}, 1400);
			});
		}, 3000); // End setInterval
	} // End loading_start
		
			
	function loading_stop(when) {
		setTimeout(function(){
			clearTimeout(loading_handle);
			jQuery('#anyfeed_slideshow_loading').stop(true).fadeOut();
			started=true;
		}, when);
	} // End loading_stop
	
	function test() {
		alert(started);	
	}
	
} // End Class function