/*!
 * @mekwall's .vangogh() for Syntax Highlighting
 *
 * All code is open source and dual licensed under GPL and MIT.
 * Check the individual licenses for more information.
 * https://github.com/mekwall/jquery-vangogh/blob/master/GPL-LICENSE.txt
 * https://github.com/mekwall/jquery-vangogh/blob/master/MIT-LICENSE.txt
 */
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/*!
 * Repo.js
 * @author Darcy Clarke
 *
 * Copyright (c) 2012 Darcy Clarke
 * Dual licensed under the MIT and GPL licenses.
 * http://darcyclarke.me/
 */
 (function($){

    // Github repo
    $.fn.repo = function( options ){

        // Context and Base64 methods
        var _this       = this,
            keyStr64    = "ABCDEFGHIJKLMNOP" + "QRSTUVWXYZabcdef" + "ghijklmnopqrstuv" + "wxyz0123456789+/" + "=",
            encode64    = function(a){a=escape(a);var b="";var c,d,e="";var f,g,h,i="";var j=0;do{c=a.charCodeAt(j++);d=a.charCodeAt(j++);e=a.charCodeAt(j++);f=c>>2;g=(c&3)<<4|d>>4;h=(d&15)<<2|e>>6;i=e&63;if(isNaN(d)){h=i=64}else if(isNaN(e)){i=64}b=b+keyStr64.charAt(f)+keyStr64.charAt(g)+keyStr64.charAt(h)+keyStr64.charAt(i);c=d=e="";f=g=h=i=""}while(j<a.length);return b},
            decode64    = function(a){var b="";var c,d,e="";var f,g,h,i="";var j=0;var k=/[^A-Za-z0-9\+\/\=]/g;if(k.exec(a)){}a=a.replace(/[^A-Za-z0-9\+\/\=]/g,"");do{f=keyStr64.indexOf(a.charAt(j++));g=keyStr64.indexOf(a.charAt(j++));h=keyStr64.indexOf(a.charAt(j++));i=keyStr64.indexOf(a.charAt(j++));c=f<<2|g>>4;d=(g&15)<<4|h>>2;e=(h&3)<<6|i;b=b+String.fromCharCode(c);if(h!=64){b=b+String.fromCharCode(d)}if(i!=64){b=b+String.fromCharCode(e)}c=d=e="";f=g=h=i=""}while(j<a.length);return unescape(b)},
            transition  = function(el, direction, init){
                var opposite    = (direction === 'left') ? '' : 'left';

                if(init){
                    el.addClass('active');
                    _this.container.css({'height' : calculateHeight(el) + 'px'});
                } else {
                    _this.container
                        .find('.page.active')
                        .css('position','absolute')
                        .addClass(direction)
                        .removeClass('active')
                        .end()
                        .css({'height' : calculateHeight(el) + 'px'});
                    el.addClass('active')
                        .removeClass(opposite)
                        .delay(250)
                        .queue(function(){
                            $(this).css('position','relative').dequeue();
                        });
                }
            },

            calculateHeight = function(el){
                // This calculates the height of the bounding box for the repo display.
                // clientHeight is element containing fetched results, plus the h1 tag, plus
                // the div repo margin has of 15 pixels.
                return (el[0].clientHeight + _this.container.find('h1').outerHeight(true) + 15);
            },

            getMimeTypeByExtension = function(extension){
                var mimeTypes = {
                    // images
                    'png': 'image/png',
                    'gif': 'image/gif',
                    'jpg': 'image/jpeg',
                    'jpeg': 'image/jpeg',
                    'ico': 'image/x-icon'
                };
                return mimeTypes[extension] ? mimeTypes[extension] : 'text/plain';
            };

        // Settings
        _this.settings = $.extend({
                user    : '',
                name    : '',
                branch  : 'master',
                css     : '@font-face{font-family:"Octicons Regular";src:url("https://a248.e.akamai.net/assets.github.com/fonts/octicons/octicons-regular-webfont.eot?639c50d4");src:url("https://a248.e.akamai.net/assets.github.com/fonts/octicons/octicons-regular-webfont.eot?639c50d4#iefix") format("embedded-opentype"),url("https://a248.e.akamai.net/assets.github.com/fonts/octicons/octicons-regular-webfont.woff?0605b255") format("woff"),url("https://a248.e.akamai.net/assets.github.com/fonts/octicons/octicons-regular-webfont.ttf?f82fcba7") format("truetype"),url("https://a248.e.akamai.net/assets.github.com/fonts/octicons/octicons-regular-webfont.svg?1f7afa21#newFontRegular") format("svg");font-weight:normal;font-style:normal}@font-face{font-family:"repo-icons";src:url("https://raw.github.com/darcyclarke/Repo.js/master/fonts/repo.eot");src:url("https://raw.github.com/darcyclarke/Repo.js/master/fonts/repo.eot#iefix") format("embedded-opentype"),url("https://raw.github.com/darcyclarke/Repo.js/master/fonts/repo.woff") format("woff"),url("https://raw.github.com/darcyclarke/Repo.js/master/fonts/repo.ttf") format("truetype"),url("https://raw.github.com/darcyclarke/Repo.js/master/fonts/repo.svg") format("svg");font-weight:normal;font-style:normal}.repo,.repo *{-webkit-box-sizing:border-box;-moz-box-sizing:border-box;-ms-box-sizing:border-box;box-sizing:border-box}.repo ul *{display:block;font-family:sans-serif;font-size:13px;line-height:18px}.repo{width:100%;margin:0 0 15px 0;position:relative;padding-bottom:1px;color:#555;overflow:hidden;height:300px;-webkit-transition:height .25s;-moz-transition:height .25s;-o-transition:height .25s;-ms-transition:height .25s;transition:height .25s}.repo .page{background:#f8f8f8;border:4px solid rgba(0,0,0,0.08);border-radius:3px;-ms-filter:"alpha(opacity=0)";filter:alpha(opacity=0);opacity:0;left:100%;width:98%;position:absolute;-webkit-transition:all 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.5em;background:#fff}.repo .vg-code{color:#000;background:#f8f8ff;border:0;padding:.4em}.repo .vg-code .comment,.repo .vg-code .template_comment,.repo .vg-code .diff .header,.repo .vg-code .javadoc{color:#998;font-style:italic}.repo .vg-code .keyword,.repo .vg-code .css .rule .keyword,.repo .vg-code .winutils,.repo .vg-code .javascript .title,.repo .vg-code .lisp .title,.repo .vg-code .subst{color:#000;font-weight:bold}.vg-code .number,.vg-code .hexcolor{color:#40a070}.vg-code .string,.repo .vg-code .tag .value,.repo .vg-code .phpdoc,.repo .vg-code .tex .formula{color:#d14}.repo .vg-code .title,.repo .vg-code .id{color:#900;font-weight:bold}.repo .vg-code .javascript .title,.repo .vg-code .lisp .title,.repo .vg-code .subst{font-weight:normal}.repo .vg-code .class .title,.repo .vg-code .haskell .label,.repo .vg-code .tex .command{color:#458;font-weight:bold}.repo .vg-code .tag,.repo .vg-code .tag .title,.repo .vg-code .rules .property,.repo .vg-code .django .tag .keyword{color:#000080;font-weight:normal}.repo .vg-code .attribute,.repo .vg-code .variable,.repo .vg-code .instancevar,.repo .vg-code .lisp .body{color:#008080}.repo .vg-code .regexp{color:#009926}.repo .vg-code .class{color:#458;font-weight:bold}.repo .vg-code .symbol,.repo .vg-code .ruby .symbol .string,.repo .vg-code .ruby .symbol .keyword,.repo .vg-code .ruby .symbol .keymethods,.repo .vg-code .lisp .keyword,.repo .vg-code .tex .special,.repo .vg-code .input_number{color:#990073}.repo .vg-code .builtin,.repo .vg-code .built_in,.repo .vg-code .lisp .title{color:#0086b3}.repo .vg-code .codeprocessor,.repo .vg-code .pi,.repo .vg-code .doctype,.repo .vg-code .shebang,.repo .vg-code .cdata{color:#999;font-weight:bold}.repo .vg-code .deletion{background:#fdd}.repo .vg-code .addition{background:#dfd}.repo .vg-code .diff .change{background:#0086b3}.repo .vg-code .chunk{color:#aaa}.repo .vg-code .tex .formula{-ms-filter:"alpha(opacity=50)";filter:alpha(opacity=50);opacity:.5}'
            }, options);

        // Extension Hashes
        _this.extensions = {
            as          : 'actionscript',
            coffee      : 'coffeescript',
            css         : 'css',
            html        : 'html',
            js          : 'javascript',
            md          : 'markdown',
            php         : 'php',
            py          : 'python',
            rb          : 'ruby'
        };

        // Repo
        _this.repo = {
            name        : 'default',
            folders     : [],
            files       : []
        };

        // Namespace - strip out characters that would have to be escaped to be used in selectors
        _this.namespace = _this.settings.name.toLowerCase().replace(/[^a-z0-9_-]/g, '');

        // Check if this namespace is already in use
        var usedNamespaces = $('[data-id^='+ _this.namespace +']');
        if(usedNamespaces.length){
            _this.namespace += String(usedNamespaces.length);
        }

        // Insert CSS
        if(typeof _this.settings.css != 'undefined' && _this.settings.css !== '' && $('#repojs_css').length <= 0)
            $('body').prepend($('<style id="repojs_css">').html(_this.settings.css));

        // Query Github Tree API
        $.ajax({
            url: 'https://api.github.com/repos/' + _this.settings.user + '/' + _this.settings.name + '/git/trees/' + _this.settings.branch + '?recursive=1',
            type: 'GET',
            data: {},
            dataType: 'jsonp',
            success: function(response){

                var treeLength = response.data.tree.length;
                $.each(response.data.tree, function(i){

                    // Setup if last element
                    if(!--treeLength){
                        _this.container.addClass('loaded');
                        // Add 10ms timeout here as some browsers require a bit of time before calculating height.
                        setTimeout( function(){
                            transition(_this.container.find('.page').first(), 'left', true);
                        }, 10 );
                    }

                    // Return if data is not a file
                    if(this.type != 'blob')
                        return;

                    // Setup defaults
                    var first       = _this.container.find('.page').first()
                        ctx         = _this.repo,
                        output      = first,
                        path        = this.path,
                        arr         = path.split('/'),
                        file        = arr[(arr.length - 1)],
                        id          = '';

                    // Remove file from array
                    arr = arr.slice(0,-1);
                    id = _this.namespace;

                    // Loop through folders
                    $.each(arr, function(i){

                        var name    = String(this),
                            index   = 0,
                            exists  = false;

                        id = id + '_split_' + name.replace('.','_dot_');

                        // Loop through folders and check names
                        $.each(ctx.folders, function(i){
                            if(this.name == name){
                                index = i;
                                exists = true;
                            }
                        });

                        // Create folder if it doesn't exist
                        if(!exists){

                            // Append folder to DOM
                            if(output !== first){
                                output.find('ul li.back').after($('<li class="dir"><a href="#" data-id="' + id + '">' + name +'</a></li>'));
                            } else {
                                output.find('ul li').first().after($('<li class="dir"><a href="#" data-id="' + id + '">' + name +'</a></li>'));
                            }

                            // Add folder to repo object
                            ctx.folders.push({
                                name        : name,
                                folders     : [],
                                files       : [],
                                element     : $('<div class="page" id="' + id + '"><ul><li class="titles"><span>name</span></li><li class="back"><a href="#">..</a></li></ul></page>').appendTo(_this.container)[0]
                            });
                            index = ctx.folders.length-1;

                        }

                        // Change context & output to the proper folder
                        output = $(ctx.folders[index].element);
                        ctx = ctx.folders[index];

                    });

                    // Append file to DOM
                    output.find('ul').append($('<li class="file"><a href="#" data-path="' + path + '" data-id="' + id + '">' + file +'</a></li>'));

                    // Add file to the repo object
                    ctx.files.push(file);

                });

                // Bind to page links
                _this.container.on('click', 'a', function(e){

                    e.preventDefault();

                    var link        = $(this),
                        parent      = link.parents('li'),
                        page        = link.parents('.page'),
                        repo        = link.parents('.repo'),
                        el          = $('#' + link.data('id'));

                    // Is link a file
                    if(parent.hasClass('file')){

                        el = $('#' + link.data('id'));

                        if(el.legnth > 0){
                            el.addClass('active');
                        } else {
                            $.ajax({
                                url: 'https://api.github.com/repos/' + _this.settings.user + '/' + _this.settings.name + '/contents/' + link.data('path') + '?ref=' + _this.settings.branch,
                                type: 'GET',
                                data: {},
                                dataType: 'jsonp',
                                success: function(response){
                                    var fileContainer = $('<div class="file page" id="' + link.data('id') + '"></div>'),
                                        extension = response.data.name.split('.').pop().toLowerCase(),
                                        mimeType = getMimeTypeByExtension(extension);

                                    if('image' === mimeType.split('/').shift()){
                                        el = fileContainer.append($('<div class="image"><span class="border-wrap"><img src="" /></span></div>')).appendTo(repo);
                                        el.find('img')
                                            .attr('src', 'data:' + mimeType + ';base64,' + response.data.content)
                                            .attr('alt', response.data.name);
                                    }
                                    else {
                                        el = fileContainer.append($('<pre><code></code></pre>')).appendTo(repo);
                                        if(typeof _this.extensions[extension] != 'undefined')
                                            el.find('code').addClass(_this.extensions[extension]);
                                        el.find('code').html(String(decode64(response.data.content)).replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/"/g, '&quot;'));
                                        el.find('pre').vanGogh();
                                    }

                                    transition(el, 'left');
                                },
                                error: function(response){
                                    if(console && console.log)
                                        console.log('Request Error:', e);
                                }
                            });
                        }

                    // Is link a folder
                    } else if(parent.hasClass('dir')) {

                        _this.container
                            .find('h1')
                            .find('.active')
                            .removeClass('active')
                            .end()
                            .append('<a href="#" data-id="' + link.data('id') + '" class="active">' + link.text() + '</a>');
                        transition(el, 'left');

                    // Is link a back link
                    } else if(parent.hasClass('back')){

                        _this.container.find('h1 a').last().remove();
                        el = page[0].id.split('_split_').slice(0,-1).join('_split_');
                        el = (el == _this.namespace) ? _this.container.find('.page').first() : $('#' + el);
                        transition(el, 'right');

                    // Is nav link
                    } else {
                        el = el.length ? el : _this.container.find('.page').eq(link.index());

                        if(link[0] !== _this.container.find('h1 a')[0])
                            link.addClass('active');
                        _this.container.find('h1 a').slice((link.index()+1),_this.container.find('h1 a').length).remove();
                        transition(el, 'right');
                    }
                });
            },
            error : function(response){
                if(console && console.log)
                    console.log('Request Error:', response);
            }
        });

        // Setup repo container
        return this.each(function(){
            _this.container = $('<div class="repo"><h1><a href="#" data-id="' + _this.namespace + '_split_default">' + _this.settings.name + '</a></h1><div class="loader"></div><div class="page" id="' + _this.namespace + '_split_default"><ul><li class="titles"><span>name</span></li></ul></div></div>').appendTo($(this));
        });
    };

})(jQuery);