/* 	Realtime Related Tweets Bar v1.0
	Blog : http://www.moretechtips.net
	Project: http://code.google.com/p/realtime-related-tweets-bar/
	Copyright 2009 [Mike @ moretechtips.net] 
	Licensed under the Apache License, Version 2.0 
	(the "License"); you may not use this file except in compliance with the License. 
	You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 
*/
 (function($) {
    $.fn.relatedTweets = function(allOptions) {
        var defaults = {
            debug: 0,
            query: '',
            default_query: '',
            realtime: 1,
            status: 0,
            lang: 'en',
            n: 10,
            max_tags: 5,
            or_tags: 1,
            show_avatar: 1,
            show_author: 1,
            show_date: 1,
            show_source: 1,
            image_width: 48,
            from_users: '',
            to_users: '',
            at_users: '',
            links_only: 0,
            geocode: '',
            stay_time: 5000,
            enter_time: 300,
            exit_time: 200,
            animate: 'opacity'
        };
        allOptions = $.extend({},
        defaults, allOptions);
        return this.each(function() {
            var div = $(this);
            var count = 0,
            ul = null,
            max_id = 0;
            var visibleI = -1;
            var calls = 0,
            removeExtra = false;
            var effectParams = new Object;
            var op = allOptions;
            if (div.attr('options')) {
                try {
                    op = eval('(' + div.attr('options') + ')');
                } catch(e) {
                    if (op.debug) div.html('<b style="color:red">' + e + '</b>');
                    return;
                }
                op = $.extend({},
                defaults, op);
            };
            var searchLoaded = function(json, status) {
                if (!json.results || !json.max_id) {
                    if (op.debug) div.html('<b style="color:red">Error:' + (json.error ? json.error: 'unkown') + '</b>');
                    return;
                }
                var rs = json.results;
                if (json.max_id > 0) max_id = json.max_id;
                if (calls == 0) {
                    if (rs.length == 0) return;
                    count = rs.length;
                    var inDiv = $('<div class="rrt-inner"></div>').appendTo(div.html(''));
                    ul = $('<ul></ul>').appendTo(inDiv);
                }
                calls++;
                for (var i = rs.length - 1; i >= 0; i--) appendLI(rs[i], rs.length - 1 - i);
                if (calls > 1 && rs.length) removeExtra = true;
                if (calls == 1) fadeOut();
            };
            var appendLI = function(x, i) {
                $('<li style="display:none;">' + (op.show_avatar ? '<span class="rrt-author-img">' + '<a target="_blank" href="http://twitter.com/' + x.from_user + '" title="' + x.from_user + '">' + '<img src="' + x.profile_image_url + '" height="' + op.image_width + '" width="' + op.image_width + '" border="0"/>' + '</a>' + '</span>': '') + '<span class="rrt-body">' + (op.show_author ? '<strong>' + '<a target="_blank" href="http://twitter.com/' + x.from_user + '" title="' + x.from_user + '">' + x.from_user + '</a>' + '</strong>': '') + '<span class="rrt-content">' + linkify(x.text) + '</span>' + '<span class="rrt-meta">' + (op.show_date ? '<a target="_blank" class="rrt-date" href="http://twitter.com/' + x.from_user + '/status/' + x.id + '">' + formatDate(x.created_at) + '</a>': '') + (op.show_source ? '<span class="rrt-source"> from ' + decodeHTML(x.source) + '</span>': '') + '</span>' + '</span>' + '</li>').appendTo(ul);
            };
            var fadeOut = function() {
                if (visibleI > -1) {
                    $('li', ul).eq(visibleI).fadeOut(op.exit_time, fadeIn);
                } else fadeIn();
            };
            var fadeIn = function() {
                if (removeExtra) removeExtraLI();
                visibleI++;
                if (visibleI >= count) visibleI = 0;
                effectParams[op.animate] = 'show';
                $('li', ul).eq(visibleI).animate(effectParams, op.enter_time, "linear", fadeStill);
                if (visibleI + 1 >= count && op.realtime) search();
            };
            var fadeStill = function() {
                $('li', ul).eq(visibleI).animate({
                    opacity: 1
                },
                op.stay_time, "linear", fadeOut);
            };
            var removeExtraLI = function() {
                var crntCount = $('li', ul).size();
                if (crntCount > op.n) {
                    $('li:lt(' + (crntCount - op.n) + ')', ul).remove();
                    count = op.n;
                } else {
                    count = crntCount;
                }
                removeExtra = false;
            };
            var linkify = function(d) {
                return d.replace(/\bhttps?\:\/\/\S+/gi,
                function(b) {
                    var c = '';
                    b = b.replace(/(\.*|\?*|\!*)$/,
                    function(m, a) {
                        c = a;
                        return ''
                    });
                    return '<a target="_blank" class="rrt-link" href="' + b + '">' + ((b.length > 25) ? b.substr(0, 24) + '...': b) + '</a>' + c;
                }).replace(/\B\@([A-Z0-9_]{1,15})/gi, '@<a target="_blank" class="rrt-at" href="http://twitter.com/$1">$1</a>').replace(/\B\#([A-Z0-9_]+)/gi, '<a target="_blank" class="rrt-hashtag" href="http://search.twitter.com/search?q=%23$1">#$1</a>')
            };
            var decodeHTML = function(s) {
                return s.replace(/&lt;/gi, '<').replace(/&gt;/gi, '>').replace(/&quot;/gi, '"');
            };
            var formatDate = function(dstr) {
                var dat = new Date(),
                tody = new Date();
                dat.setTime(Date.parse(dstr));
                var td = tody.getDate(),
                tm = tody.getMonth() + 1,
                ty = tody.getFullYear(),
                th = tody.getHours(),
                tmn = tody.getMinutes(),
                ts = tody.getSeconds();
                var d = dat.getDate(),
                m = dat.getMonth() + 1,
                y = dat.getFullYear(),
                h = dat.getHours(),
                mn = dat.getMinutes(),
                s = dat.getSeconds();
                if (y == ty && m == tm && d == td) {
                    var dh = th - h;
                    if (dh > 0) return dh + ' hour' + (dh > 1 ? 's': '') + ' ago';
                    var dmn = tmn - mn;
                    if (dmn > 0) return dmn + ' minute' + (dmn > 1 ? 's': '') + ' ago';
                    var ds = ts - s;
                    return ds + ' second' + (ds > 1 ? 's': '') + ' ago';
                } else return m + '/' + d + '/' + y;
            };
            var search = function() {
                var data = {
                    lang: op.lang,
                    q: op.query,
                    rpp: op.n,
                    since_id: max_id
                };
                if (op.geocode) data.geocode = op.geocode;
                $.ajax({
                    url: 'http://search.twitter.com/search.json',
                    data: data,
                    success: searchLoaded,
                    dataType: 'jsonp'
                });
            };
            var init = function() {
                var tags = [];
                if (!op.query && !op.status) $('a[rel="tag"]:lt(' + op.max_tags + ')').each(function() {
                    var tag = $.trim($(this).text().replace(/\n/g, ''));
                    if ($.inArray(tag, tags) == -1) tags[tags.length] = tag;
                });
                if (tags.length > 0) op.query = tags.join((op.or_tags ? ' OR ': ' '));
                if (!op.query) op.query = op.default_query;
                if (op.from_users) op.query += " from:" + op.from_users.replace(/\s/g, '').replace(/,/g, ' OR from:');
                if (op.to_users) op.query += " to:" + op.to_users.replace(/\s/g, '').replace(/,/g, ' OR to:');
                if (op.at_users) op.query += " @" + op.at_users.replace(/\s/g, '').replace(/,/g, ' OR @');
                if (op.links_only) op.query += ' filter:links';
                search();
            };
            init();
        });
    }
})(jQuery);
jQuery(document).ready(function() {
    jQuery('div.related-tweets').relatedTweets();
});