//**************************************************************************************
//CREATED BY           	:   ABHIJITH BABU
//EMAIL ID             	:   ABHIJITHBABU@GMAIL.COM
//DATE                  :   23 MARCH 2011
//DESCRIPTION 			: 	TWITTER FEED JQUERY PLUGIN
//**************************************************************************************
(function($) {
	$.fn.twitterfeed = function(term, options) {

		var defaultSettings = {
				count : 10,
				timer : 5000,
				type : "query",
				autoplay : 1,
				multiple : false
		};
		var twitterArr = {};
		var FadeArr = {};
		var flagstart = 0;
		var settings = $.extend(defaultSettings, options);
		if (settings.type == "query") {
			if (settings.multiple == false || settings.multiple=='') {
				var url = "http://search.twitter.com/search.json?q=" + escape(term)	+ "&callback=?";
			}else{
				var url = "http://search.twitter.com/search.json?ors=" + escape(term)	+ "&callback=?";
			}
		} else {
			var url = "http://api.twitter.com/1/statuses/user_timeline.json?screen_name=" + escape(term) + "&callback=?";
		}
		if (this) {
			var holder = this;
		}
		searchtwitter();
		function searchtwitter() {
			jQuery.getJSON(
					url,
					function(response) {
						if (settings.type == "query") {
							var result_container = response.results;
						} else {
							var result_container = response;
						}
						if (result_container) {
							var i = -1;
							var result;
							var tweets = [];
							while ((result = result_container[++i]) && !twitterArr[result.id]) {
								twitterArr[result.id] = result.id;
								if (settings.type == "query") {
									name = result.from_user;
									prof_img = result['profile_image_url'];
									username = result.from_user;
								} else {
									name = result.name;
									prof_img = response[0].user.profile_image_url;
									username = response[i].user.screen_name;
								}
								tweets.push('<li id="TwitterId');
								tweets.push(result.id);
								tweets.push('"><a href="http://www.twitter.com/');
								tweets.push( name);
								tweets.push('" title="Visit profile" target="_blank"><img src="');
								tweets.push( prof_img);
								tweets.push('" alt="Profile Image"  class="userImg"/></a> <a href="http://www.twitter.com/');
								tweets.push( name);
								tweets.push('" title="Visit profile" target="_blank"><strong class="username">');
								tweets.push( username);
								tweets.push('</strong></a> ');
								tweets.push( result.text.makeLink());
								tweets.push('<br /><span class="feedInfo">');
								tweets.push( get_time(result.created_at));
								tweets.push('</span><br /></li>');
								idgot = result.id;
								if (flagstart != 0) {
									break;
								}
							}
							var html_output = tweets.join("");
							flagstart = 1;
							if (html_output !== '')
								holder.prepend(html_output).find('li:hidden').slideToggle('slow');
							if (!FadeArr[idgot]) {
								element=jQuery("#TwitterId" + idgot);
								animatebackground(element, 5, 0);
								FadeArr[idgot] = idgot;
							}
							holder.children("li:gt(" + settings.count + ")").remove();
						}
					})

		}

		$.fn.start = function() {
			timerInst = setInterval(function() {
				searchtwitter()
			}, settings.timer);
		};
		$.fn.pause = function() {
			clearInterval(timerInst);
		};
		if (typeof String.prototype.makeLink === "undefined") {
			String.prototype.makeLink = function() {
				return this
				.replace(
						/[A-Za-z]+:\/\/[A-Za-z0-9-_]+\.[A-Za-z0-9-_:%&\?\/~.=]+/,
						function(m) {
							return m.link(m);
						});
			};
		}
		function get_time(time_value) {
			if (settings.type == "query") {
				var valArr = time_value.split(" ");
				time_value = valArr[2] + " " + valArr[1] + ", " + valArr[3]
				                                                         + " " + valArr[4];
			} else {
				time_value = time_value.replace(/(\+[0-9]{4}\s)/ig, "");
			}
			var parsedDt = Date.parse(time_value);
			var relTo = (arguments.length > 1) ? arguments[1] : new Date();
			var secs = parseInt((relTo.getTime() - parsedDt) / 1000,10);
			secs = secs + (relTo.getTimezoneOffset() * 60);
			var r = '';
			if (secs < 60) {
				r = 'a minute ago';
			} else if (secs < 120) {
				r = 'couple of minutes ago';
			} else if (secs < (45 * 60)) {
				r = (parseInt(secs / 60),10).toString() + ' minutes ago';
			} else if (secs < (90 * 60)) {
				r = 'an hour ago';
			} else if (secs < (24 * 60 * 60)) {
				r = '' + (parseInt(secs / 3600),10).toString() + ' hours ago';
			} else if (secs < (48 * 60 * 60)) {
				r = '1 day ago';
			} else {
				r = (parseInt(secs / 86400,10)).toString() + ' days ago';
			}
			return r;
		}
		function animatebackground(element, fromcolor, tocolor) {
			fromcolor += fromcolor > tocolor ? -1 : 1;
			if(!jQuery.support.opacity){
				if(fromcolor != tocolor){
					var opStr = (Math.round(fromcolor * 25.5)).toString(16);

					element.css({background:'transparent',filter:"progid:DXImageTransform.Microsoft.gradient(startColorstr=#" + opStr + "FFFF00, endColorstr=#" + opStr + "FFFF00)"});   
				}else{
					element.css({background:'transparent',filter:"none"});   
				}
			}else{
				element.css("backgroundColor", "rgba(255, 255, 0, " + (fromcolor) / 10 + ")"); 
			}

			if(fromcolor != tocolor){  
				setTimeout(function() { animatebackground(element, fromcolor, tocolor) }, 300);
			}
		}
		if (settings.autoplay == 1) {
			timerInst = setInterval(function() {
				searchtwitter()
			}, settings.timer);
		}

	};
})(jQuery);