// Simple quote rotation plugin written for in3media/radio-info.com
// Cory Schires - Feb 3, 2010
(function ($) {

    $.quote_rotator = {
        defaults: {
            rotation_speed: 3000,
            pause_on_hover: true
        }
    }

    $.fn.extend({
        quote_rotator: function (config) {

            var config = $.extend({}, $.quote_rotator.defaults, config);

            return this.each(function () {

                // cache for selector performance
                var quote_list = $(this);

                // prevent dummies from setting the rotation speed too fast
                var rotation_speed = config.rotation_speed < 2000 ? 2000 : config.rotation_speed;

                // hide all the quotes
                quote_list.find('li').hide();

                // apply active class to first quote unless already applied elsewhere
                if (!(quote_list.find('li.active')).length) {
                    $('li:first', quote_list).addClass('active');
                };

                // show the active quote 
                quote_list.find('li.active').show();

                // activate quote rotation
                var rotation_active = true;

                // stop quote rotation on hover
                quote_list.hover(function () {
                    if (config.pause_on_hover) { rotation_active = false };
                }, function () {
                    rotation_active = true
                });

                // rotate quotes
                setInterval(function () {
                    if (rotation_active) {

                        var active_quote = quote_list.find('li.active');
                        var next_quote = active_quote.next().length ? active_quote.next() : quote_list.find('li:first');

                        // rotate quotes with fade effect
                        active_quote.animate({
                            opacity: 0 // fade out active quote
                        }, 1000, function () {
                            active_quote.hide().css('opacity', 1); // hide and reset opacity
                            next_quote.fadeIn(1000); // fade in next quote
                        });

                        // swap the class to prepare for the next fade effect interal
                        active_quote.removeClass('active');
                        next_quote.addClass('active');
                    };

                }, rotation_speed);

            })
        }
    })

})(jQuery);