/*
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: 1.0.9
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) {
/*--------------------------- Global Variables -------------------------*/
var pause_rate=5000,fade_rate=1000,loading_text='Loading...',media_type='content';
var container="#anyfeed_slideshow_main",xml_url="temp.xml",c_width="100%";
var c_height="200px",navigation=true,title_bar=true,bgcolor='transparent',debug=false;
var total=0,loaded=0,slideshow_handle,loading_handle,slide_i=(1),started=false;
var titlebar,fish,url,re,counter=0,first_time=true,is_loaded=false;
for (var key in options) { if(eval(key+'!== undefined')) { eval(key+' = options.'+key+';'); } }

/*----------------------------------------------------------------------*/
	
	this.init = function() {
		
		// Set width and height
		jQuery(container).css({width: c_width, height: c_height});
		
		anyfeed.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 media;
				jQuery(xml).find('description').each(function(){ media = jQuery(this).text(); return false; });
				if(media == 'true') {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();
						// if(debug) { console.log("Trying to parse media feed."); }
						jQuery(this).find('[nodeName=media:'+media_type+']').each(function(){ // if(debug) { console.log("Successful- pulling image."); }
		
							url = jQuery(this).attr('url');
							// if(debug) { console.log(url); }
							if(url === null || url === "" || url === undefined) { 
								// if(debug) { console.log("Skipped."); } 
							}
							else{ anyfeed.loadImage(title, url, link); return false;}
						});
					});
				} else { 
// Regular RSS Feed	(prep)				
					// if(debug) { console.log("Trying to parse RSS feed."); }
					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;
		
							url = jQuery(this).attr('url');
							// if(debug) { console.log(url); }
							if(url === null || url === "" || url === undefined) { 
								// if(debug) { console.log("Skipped."); } 
							}
							else{ anyfeed.loadImage(title, url, link); }
						});
						

// Feed without image attachments
						if(tmpcounter === 0) { 
							// if(debug) { console.log("Attempting to find XML Content:encoded..."); }
							fish = jQuery(this).find('[nodeName=content:encoded]').text();
							if(fish) {
								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;
									anyfeed.loadImage(title, url, link);
								}
							} // 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..."); }
							fish = jQuery(this).find('description').text();
							if(jQuery(fish).find('img').each(function(){return true;})) {
								url = jQuery(fish).find('img').attr('src');
								// This gets rid of comment counts and some advertisements
								re = new RegExp("/(.*feedburner.*|.*ads\..*)/", "i");
								m = re.exec(url);
								if (m===null && url!==undefined) {
									// if(debug) { console.info("Feed without content "); }
									// if(debug) { console.log("URL: " + url); }
									tmpcounter + 1;
									anyfeed.loadImage(title, url, link);
								}  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) {
					title = 'No images found'
					link = 'http://tixen.net'
					anyfeed.loadImage(title, 'http://tixen.net/files/anyfeed-slideshow/error.gif', link);
				}

				jQuery(container).hover(
					function() { 
						if(is_loaded){
							jQuery("div.anyfeed_titlebar").fadeIn(fade_rate / 5);
							if(loaded > 1)jQuery("div.anyfeed_navigation").fadeIn(fade_rate / 5);
							setTimeout(function() {jQuery("div.anyfeed_titlebar").css({display: "block"});},fade_rate / 3);
							if(loaded > 1)setTimeout(function() {jQuery("div.anyfeed_navigation").css({display: "block"});},fade_rate / 3);
						}
						started = false;
						clearTimeout(slideshow_handle); 
					}, function () { 
						jQuery("div.anyfeed_titlebar").fadeOut(fade_rate / 2);
						if(loaded > 1) jQuery("div.anyfeed_navigation").fadeOut(fade_rate / 2);
						setTimeout(function() {jQuery("div.anyfeed_titlebar").css({display: "none"});},fade_rate / 2);
						anyfeed.start();
					}
				);
			
	// if(debug) { console.groupEnd(); }
	// if(debug) { console.group("Loading Images..."); }
	
			},
			error: function() {
				// if(debug){jQuery(container).html("Failed to retreive XML file."); }
			}
		});
	}
	
/******************************************************************************** START */
	this.start = function() {

		// if(debug) { console.groupEnd(); }
		if(!started){
			if(first_time) {
				anyfeed.loading_stop(1);
				is_loaded=true;
				jQuery("#anyfeed_photo_1").fadeIn(fade_rate);
				if(total == 1){return false;}
				first_time = false;
			}
			started = true; 
			slideshow_handle = setInterval(function() {
				if(slide_i >= total){
					var fadethis="#anyfeed_photo_"+(total);
					slide_i = 1; 
				} else { 
					var fadethis = "#anyfeed_photo_"+(slide_i);
					slide_i = slide_i + 1;
				}	
				
				// if(debug){ console.log("Photo "+ slide_i + "/" +total);}
				setTimeout(function(){
					jQuery(fadethis).fadeOut(fade_rate);
				}, fade_rate / 2);
				jQuery("#anyfeed_photo_"+slide_i).fadeIn(fade_rate);
				
			}, pause_rate + fade_rate);
		}
	}
	
/********************************************************************************* NEXT */
	this.next = function(){
			if(slide_i >= total){
				var fadethis="#anyfeed_photo_"+(total);  
				slide_i = 1; 
			} else { 
				var fadethis="#anyfeed_photo_"+(slide_i);
				slide_i = slide_i + 1;
			}
		setTimeout(function(){
			// if(debug){ console.log("Photo "+ slide_i + "/" +total);}
			jQuery(fadethis).fadeOut(fade_rate / 3);
		}, fade_rate / 6);
		jQuery("#anyfeed_photo_"+slide_i).fadeIn(fade_rate / 3);
	}	
	
/********************************************************************************* PREV */
	this.prev = function(){
		if(slide_i <= 1){
			var fadethis="#anyfeed_photo_"+total; 
			slide_i = total; 
		}else {
			var fadethis="#anyfeed_photo_"+slide_i;
			slide_i = slide_i - 1;
		}
		setTimeout(function(){
			// if(debug){ console.log("Photo "+ slide_i + "/" +total);}
			jQuery(fadethis).fadeOut(fade_rate / 3);
		}, fade_rate / 6);
		jQuery("#anyfeed_photo_"+slide_i).fadeIn(fade_rate / 3);
	}

/************************************************************************ LOADING_START */
	this.loading_start = function() {
		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
		
			
/************************************************************************* LOADING_STOP */
	this.loading_stop = function(when) {
		if(started) {return false;}
		setTimeout(function(){
			clearTimeout(loading_handle);
			jQuery('#anyfeed_slideshow_loading')
				.stop(true)
				.fadeOut(100, 'swing', function() {
					document.getElementById("anyfeed_slideshow_loading").style.display = "none";
					is_loaded = true;
				});
			
		}, when);
	} // End loading_stop
	
/**************************************************************************** LOADIMAGE */
	this.loadImage = function(title, url, link) {
		counter = counter + 1;
		total = total + 1;
		var i1 = new Image();
		i1.onload = function() {
			loaded = loaded + 1;
			if(title_bar){ titlebar='<div class="anyfeed_titlebar">'+title+'</div>';} else{ titlebar = ''; }
			jQuery(container).html(jQuery(container).html()+'<div class="anyfeed_photo" id="anyfeed_photo_'+loaded+'" style="background-image: url(\''+url+'\'); background-color: '+bgcolor+';" onclick="window.open(\''+link+'\', \'_blank\');">'+titlebar+'</div>');
			// if(debug) { console.log("Added."); }
			if(loaded == total){ 
				anyfeed.start();
			}
		};
		i1.onabort = function() {
			total = total - 1;
			// if(debug) { console.log('Failed to download image.'); }
			
		};
		i1.onerror = function() {
			total = total - 1;
			// if(debug) { console.log('Failed to download image.'); }
			if(total == 0) {
				titlebar='<div class="anyfeed_titlebar">Images failed to load</div>';
				jQuery(container).html(jQuery(container).html()+'<div class="anyfeed_photo" id="anyfeed_photo_1" style="background-image: url(\'http://tixen.net/files/anyfeed-slideshow/error.gif\'); background-color: '+bgcolor+';" onclick="window.open(\'#\');">'+titlebar+'</div>');
				total=1; loaded=1;
				anyfeed.start();
			}
		};
		i1.src = url;
	}
	
/********************************************************************************** DIE */
	this.die = function() {
		started = false;
		clearTimeout(slideshow_handle); 
	}


/**************************************************************************** GETDATA */	
	this.getData = function() { 
		alert(
			('loaded: '+loaded)+"\r\n"+ 
			('total: '+total)+"\r\n"+
			('counter: '+counter)+"\r\n"+
			('started: '+started)
		);
	}

} // End Class function