// 'stacks' is the Stacks global object.
// All of the other Stacks related Javascript will 
// be attatched to it.
var stacks = {};


// this call to jQuery gives us access to the globaal
// jQuery object. 
// 'noConflict' removes the '$' variable.
// 'true' removes the 'jQuery' variable.
// removing these globals reduces conflicts with other 
// jQuery versions that might be running on this page.
stacks.jQuery = jQuery.noConflict(true);

// Javascript for stacks_in_149_page183
// ---------------------------------------------------------------------

// Each stack has its own object with its own namespace.  The name of
// that object is the same as the stack's id.
stacks.stacks_in_149_page183 = {};

// A closure is defined and assined to the stack's object.  The object
// is also passed in as 'stack' which gives you a shorthand for refering
// to this object from elsewhere.
stacks.stacks_in_149_page183 = (function(stack) {

	// When jQuery is used it will be available as $ and jQuery but only
	// inside the closure.
	var jQuery = stacks.jQuery;
	var $ = jQuery;
	

//-- RSS Select Stack v1.2 by Joe Workman --//

//---------------------------
// Start Common RSS Code
//---------------------------
formatString = function(str) {
	str = str.replace(/<[^>]+>/ig,'');
	str=' '+str;
	return $.trim(str);
};

enrichString = function(str) {
	str = str.replace(/((ftp|https?):\/\/([-\w\.]+)+(:\d+)?(\/([\w/_\.]*(\?\S+)?)?)?)/gm,'<a href="$1" target="_blank">$1</a>');
	str = str.replace(/([^\w])\@([\w\-]+)/gm,'$1@<a href="http://twitter.com/$2" target="_blank">$2</a>');
	str = str.replace(/([^\w])\#([\w\-]+)/gm,'$1<a href="http://twitter.com/search?q=%23$2" target="_blank">#$2</a>');
	return $.trim(str);
};

parse_date = function(str) {
    if (str.match(/^\d+\-\d+\-\d+T/)) {
        str = str.replace(/T.+$/,'');
    }
	var d = new Date(str);
	var m = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'June', 'July', 'Aug', 'Sept', 'Oct', 'Nov', 'Dec'];
	if (d.getUTCDate()) {
		return d.getUTCDate() + ' ' + m[d.getUTCMonth()] + ' ' + d.getFullYear();
    }
    return str;
};

find_link = function(obj) {
    var default_string = '#';
    if (obj == null || obj == undefined) {
        return default_string;
    }	
    else if (typeof obj.origLink == 'string') {
        return obj.origLink;
    }
    else if ($.isArray(obj.link)) {
        return obj.link[0].href;
    }
    else if (typeof obj.link == 'string') {
        return obj.link;
    }
    else if (typeof obj.enclosure == 'object' && typeof obj.enclosure.url == 'string') {
        return obj.enclosure.url;
    }
    return default_string;
};

find_title = function(obj) {
    var default_string = 'No Items in RSS Feed';
    if (obj == null || obj == undefined) {
        return default_string;
    }	
    else if (typeof obj.title.content == 'string') {
        return formatString(obj.title.content);
    }
    else if (typeof obj.title == 'string') {
        return formatString(obj.title);
    }
    return default_string;
};

find_date = function(obj) {
    var default_string = 'Date Unknown';
    if (obj == null || obj == undefined) {
        return default_string;
    }	
    else if (typeof obj.pubDate == 'string') {
		return parse_date(obj.pubDate);
    }
    else if (typeof obj.date == 'string') {
		return parse_date(obj.date);
    }
    else if (typeof obj.published == 'string') {
		return parse_date(obj.published);
    }
    else if (typeof obj.updated == 'string') {
		return parse_date(obj.updated);
    }
    return default_string;
};

find_descr = function(obj) {
    var default_string = 'RSS Feed Invalid. No Description Found.';
    if (obj == null || obj == undefined) {
        return default_string;
    }	
    else if (typeof obj.description == 'string') {
		return formatString(obj.description);
    }
    else if (typeof obj.encoded == 'string') {
		return formatString(obj.encoded);
    }
    else if (typeof obj.content == 'object' && typeof obj.content.content == 'string') {
		return formatString(obj.content.content);
    }
    return default_string;
};

find_author = function(obj) {
    var default_string = 'Unknown Author';
    if (obj == null || obj == undefined) {
        return default_string;
    }	
    else if (typeof obj.creator == 'string') {
		return obj.creator;
    }
    else if ($.isArray(obj.author)) {
        return obj.author[0];
    }
    else if (typeof obj.author == 'object' && typeof obj.author.email == 'string') {
		return obj.author.email;
    }
    else if (typeof obj.author == 'string') {
		return obj.author;
    }
    return default_string;
};
//---------------------------
// End Common RSS Code
//---------------------------

var $totalTabs=0;
var $tabs = new Object;
$(document).ready(function() {

    $(".rss_feed").each(function() {
        var $title = $(this).attr('feed:title');
        var $url   = $(this).attr('feed:url');

        var $obj = new Object;
        $obj["feed"] = $url;

        $tabs[$title] = $obj;
        /* Count the tabs */
        $totalTabs++;
    });	

	$('#feedWidget').show().mouseleave(function(){
		/* If the cursor left the widet, hide the drop down list: */
		$('.dropDownList').remove();
		$('#activeTab').removeClass('hover');
	}).mouseenter(function(){
		if($totalTabs>1) $('#activeTab').addClass('hover');
	});

	$('#activeTab').click(showDropDown);

	/* Using the live method to bind an event, because the .dropDownList does not exist yet: */
	$('.dropDownList div').live('click',function(){
		/* Calling the showDropDown function, when the drop down is already shown, will hide it: */
		showDropDown();
		showTab($(this).text());
	});
	
	var $show_first = $(".rss_feed:first").attr('feed:title');
    showTab($show_first);
});

function add_feed_item(obj) {
    var maxLength = 150;
	$('#tabContent').append('<div><p class="rss-title">' + find_title(obj) +
		'</p><p class="rss-date">'+ find_date(obj) + 
		'</p><p class="rss-desc">' + find_descr(obj).substring(0, maxLength) +
		'...</p><a class="tiptip"  title="' + find_date(obj) + 
		' - ' + find_descr(obj).substring(0, maxLength) + '" href="' + find_link(obj) + 
		'" target="_blank">[read]</a></div>'
	);
	if ($().tipTip) { $(".tiptip").tipTip(); }
	return;    	        
};

function showTab(key) {
	var obj = $tabs[key];
	if(!obj) return false;
	
	/* Forming the query: */
	var feed = obj.feed;
	feed = feed.replace(/feed:\/\//,'http://'); // Replace feed:// with http://
	var query = 'select * from feed where url="' + feed + '" LIMIT 2';
	
	/* Forming the URL to YQL: */
	var url = "http://query.yahooapis.com/v1/public/yql?q="+encodeURIComponent(query)+"&format=json&callback=?";

	$.getJSON(url,function(data){
		$('#tabContent').empty();
		if (data.query == null || data.query == undefined || data.query.results == null || data.query.results == undefined) {
			// Invalid or Empty RSS Feed - Add Blank/Default Entries
			add_feed_item();
	 	}
	 	else if ($.isArray(data.query.results.item || data.query.results.entry) ) {  //item exists in RSS and entry in ATOM feeds
			$.each(data.query.results.item || data.query.results.entry,function(){
	       		//Normal RSS Feed
	       		add_feed_item(this);
			})
		}
		else {
		    // RSS Feed with only one item in it
			add_feed_item(data.query.results.item || data.query.results.entry || null);
		}
	});
	$('#activeTab').text(key);
};

function showDropDown() {
	if($totalTabs<2) return false;
	
	if($('#feedWidget .dropDownList').length)
	{
		/* If the drop down is already shown, hide it: */
		$('.dropDownList').slideUp('fast',function(){ $(this).remove(); })
		return false;
	}
	
	var activeTab = $('#activeTab');
	var offsetTop = (activeTab.offset().top - $('#feedWidget').offset().top )+activeTab.outerHeight() - 5;
	
	/* Creating the drop down div on the fly: */
	var dropDown = $('<div>').addClass('dropDownList').css({
			'top'	: offsetTop,
			'width'	: activeTab.width()
	}).hide().appendTo('#feedWidget')
	
	$.each($tabs,function(j){
		/* Populating the div with the tabs that are not currently shown: */
		if(j==activeTab.text()) return true;
		$('<div>').text(j).appendTo(dropDown);
	})
	
	dropDown.slideDown('fast');
};
//-- End RSS Select Stack --//


	return stack;
})(stacks.stacks_in_149_page183);