// ==UserScript==
// @name lepro.youtube
// @author PsychodelEKS (11721)
// @description Insert preview-link to youtube video.
// @ujs:category site: enhancements
// @ujs:published 2009-04-16 19:38
// @ujs:modified 2009-04-16 23:56
// @ujs:documentation n/a
// @ujs:download n/a
// @include http://*leprosorium.ru*
// @namespace http://*leprosorium.ru*
// ==/UserScript==

// Version 1.0
// - Initial

// Version 1.1
// - Big preview image added (first one), thx 2 qexy (5624)

function createYoutubeLink(e)
{
    var textarea = false;
    var toolbar = false;

    if ( window.location.href.indexOf("comments") != -1 || window.location.href.indexOf("inbox") != -1)
    {
        textarea = document.getElementById('comment_textarea');
        if(textarea)
            toolbar = textarea.parentNode.previousSibling.previousSibling;
    }

    if ( window.location.href.indexOf("write") != -1 )
    {
        textarea = document.getElementById('comments-textarea');
        toolbar = document.createElement('div');
        toolbar.style.marginBottom = '5px';
        textarea.parentNode.insertBefore(toolbar, textarea);
    }

    if( window.location.href.indexOf("asylum") != -1 )
    {
        textarea = document.getElementById('comment_textarea');
        toolbar = textarea.parentNode.parentNode.parentNode.rows[0].cells[0];
    }

    if ( textarea )
    {
        var youtube_button = document.createElement('a');
        youtube_button.href = 'javascript:void(0);';
        youtube_button.innerHTML = '<b>YouTube</b>';
        youtube_button.addEventListener('click', function()
        {
            var youtube_link = '';
            youtube_link = window.prompt('Ссылка на ролик:', '');
            var link_parser = /v=(.+?)(?:&|$)/im;
            var parsed_link = link_parser.exec(youtube_link);
            delete(link_parser);

            if(parsed_link != null && parsed_link[1])
            {
                var video_id = parsed_link[1];

                var preview_block = document.createElement('div');
                toolbar.appendChild(preview_block);

                for (var i = 0; i < 4; i++)
                {
                    var tmp_preview_img = document.createElement('img');
                    tmp_preview_img.src = 'http://i.ytimg.com/vi/'+video_id+'/'+i+'.jpg?'+(((new Date()).getTime()%10000000)*100+Math.round(Math.random()*99));
                    tmp_preview_img.style.border = '2px solid white';
                    tmp_preview_img.style.cssFloat = 'left';
                    tmp_preview_img.width = 130;

                    tmp_preview_img.addEventListener('mouseover', function(){ this.style.borderColor='limegreen'; }, false);
                    tmp_preview_img.addEventListener('mouseout', function(){ this.style.borderColor='white'; }, false);
                    tmp_preview_img.addEventListener('click',
                        function()
                        {

                            var begin = textarea.value.substr(0, textarea.selectionStart);
                            var selection = textarea.value.substr(textarea.selectionStart, textarea.selectionEnd - textarea.selectionStart);
                            var end = textarea.value.substr(textarea.selectionEnd);
                            var newCursorPos = textarea.selectionStart;
                            var scrollPos = textarea.scrollTop;

                            var insert_link = "\n"+'<a href="http://www.youtube.com/watch?v='+video_id+'"><img src="'+this.src+'" alt="YouTube video"></a>'+"\n";
                            textarea.value = begin + insert_link + end;

                            textarea.setSelectionRange(newCursorPos+insert_link.length+2, newCursorPos+insert_link.length+2);
                            textarea.focus();

                            toolbar.removeChild(preview_block);
                            return false;
                        }, false);

                    /*tmp_preview_img.addEventListener('load',
                        function()
                        {
                            this.title = "Размер: "+this.width+"x"+this.height;
                            if(this.width > 130)
                                this.width = 130;
                        }, false);*/

                    preview_block.appendChild(tmp_preview_img);
                }

                var close_button = document.createElement('div');
                close_button.innerHTML = '<b>X</b>';
                close_button.style.color = '#DEDEDE';
                close_button.style.cssFloat = 'left';
                close_button.addEventListener('mouseover', function(){ this.style.color='#AEAEAE'; }, false);
                close_button.addEventListener('mouseout', function(){ this.style.color='#DEDEDE'; }, false);
                close_button.addEventListener('click', function(){ toolbar.removeChild(preview_block); return false; }, false);

                preview_block.appendChild(close_button);
            }
            else if( youtube_link != '' && youtube_link != undefined )
                window.alert('Не разобрал ссылку. ('+youtube_link+')');

            return false;

        }, false);

        toolbar.appendChild(youtube_button);
    }
}

if( /opera/.test(navigator.userAgent.toLowerCase()) )
    document.addEventListener("DOMContentLoaded", function(e){ createYoutubeLink(); }, false);

if( (/mozilla/.test(navigator.userAgent.toLowerCase()) && !/(compatible|webkit)/.test(navigator.userAgent.toLowerCase())) || /webkit/.test(navigator.userAgent.toLowerCase()) )
    createYoutubeLink();