/* 	Realtime Related Tweets Bar v1.0
	Blog : http://www.moretechtips.net
	Project: <http://code.google.com/p/realtime-related-tweets-bar/>http://code.google.com/p/realtime-related-tweets-bar/</http:>
	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 = $('<div class="rrt"></div>').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) {
                    $('<div class="liItem" style="display:none;">' + (op.show_avatar ? '<span class="rrt-author-img">' + '<a 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 ? '<a class="rtt-user" href="http://twitter.com/' + x.from_user + '" title="' + x.from_user + '">' + x.from_user + '</a>' : '') + '<span class="rrt-content">' + linkify(x.text) + '</span>' + '<span class="rrt-meta">' + (op.show_date ? '<a 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>' + '</div>').appendTo(ul);
                };
				
            var fadeOut = function () {
                    if (visibleI > -1) {
                        $('.liItem').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';
                    $('.liItem').eq(visibleI).animate(effectParams, op.enter_time, "linear", fadeStill);
                    if (visibleI + 1 >= count && op.realtime) search();
                };
            var fadeStill = function () {
                    $('.liItem').eq(visibleI).animate({
                        opacity: 1
                    }, op.stay_time, "linear", fadeOut);
                };
            var removeExtraLI = function () {
                    var crntCount = $('.liItem').size();
                    if (crntCount > op.n) {
                        $('.liItem:lt(' + (crntCount - op.n) + ')', ul).remove();
                        count = op.n;
                    } else {
                        count = crntCount;
                    }
                    removeExtra = false;
                };
            var linkify = function (d) {
                    return d.replace(/\bhttps?\:\/\/\S+/gi, function (b) {
                        var c = '';
                        b = b.replace(/(\.*|\?*|\!*)$/, function (m, a) {
                            c = a;
                            return ''
                        });
                        return '<a class="rrt-link" href="' + b + '">' + ((b.length > 25) ? b.substr(0, 24) + '...' : b) + '</a>' + c;
                    }).replace(/\B\@([A-Z0-9_]{1,15})/gi, '@<a class="rrt-at" href="http://twitter.com/$1">$1</a>').replace(/\B\#([A-Z0-9_]+)/gi, '<a 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 = {
                        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();
});