privatebin-mirror/js/privatebin.js

/**
 * PrivateBin
 *
 * a zero-knowledge paste bin
 *
 * @see       {@link https://github.com/PrivateBin/PrivateBin}
 * @copyright 2012 Sébastien SAUVAGE ({@link http://sebsauvage.net})
 * @license   {@link https://www.opensource.org/licenses/zlib-license.php The zlib/libpng License}
 * @version   1.1
 * @name      PrivateBin
 * @namespace
 */

'use strict';
/** global: Base64 */
/** global: FileReader */
/** global: RawDeflate */
/** global: history */
/** global: navigator */
/** global: prettyPrint */
/** global: prettyPrintOne */
/** global: showdown */
/** global: sjcl */

// Immediately start random number generator collector.
sjcl.random.startCollectors();

// startup
jQuery(document).ready(function() {
    /**
     * main application start, called when DOM is fully loaded and
     * runs controller initalization after translations are loaded
     */
    PrivateBin.i18n.loadTranslations();
});

/**
 * @name PrivateBin
 * @namespace
 */
var PrivateBin = window.PrivateBin || {};

/**
 * static helper methods
 *
 * @param  {object} window
 * @param  {object} document
 * @name helper
 * @class
 */
PrivateBin.helper = (function (window, document, jQuery, sjcl, Base64, RawDeflate) {
    var me = {};

    /**
     * character to HTML entity lookup table
     *
     * @see    {@link https://github.com/janl/mustache.js/blob/master/mustache.js#L60}
     * @private
     * @enum   {Object}
     * @readonly
     */
    var entityMap = {
        '&': '&',
        '<': '&lt;',
        '>': '&gt;',
        '"': '&quot;',
        "'": '&#39;',
        '/': '&#x2F;',
        '`': '&#x60;',
        '=': '&#x3D;'
    };

    /**
     * cache for script location
     *
     * @private
     * @enum   {string|null}
     */
    var scriptLocation = null;

    /**
     * converts a duration (in seconds) into human friendly approximation
     *
     * @name helper.secondsToHuman
     * @function
     * @param  {number} seconds
     * @return {Array}
     */
    me.secondsToHuman = function(seconds)
    {
        var v;
        if (seconds < 60)
        {
            v = Math.floor(seconds);
            return [v, 'second'];
        }
        if (seconds < 60 * 60)
        {
            v = Math.floor(seconds / 60);
            return [v, 'minute'];
        }
        if (seconds < 60 * 60 * 24)
        {
            v = Math.floor(seconds / (60 * 60));
            return [v, 'hour'];
        }
        // If less than 2 months, display in days:
        if (seconds < 60 * 60 * 24 * 60)
        {
            v = Math.floor(seconds / (60 * 60 * 24));
            return [v, 'day'];
        }
        v = Math.floor(seconds / (60 * 60 * 24 * 30));
        return [v, 'month'];
    };

    /**
     * text range selection
     *
     * @see    {@link https://stackoverflow.com/questions/985272/jquery-selecting-text-in-an-element-akin-to-highlighting-with-your-mouse}
     * @name   helper.selectText
     * @function
     * @param  {HTMLElement} element
     */
    me.selectText = function(element)
    {
        var range, selection;

        // MS
        if (document.body.createTextRange)
        {
            range = document.body.createTextRange();
            range.moveToElementText(element);
            range.select();
        }
        // all others
        else if (window.getSelection)
        {
            selection = window.getSelection();
            range = document.createRange();
            range.selectNodeContents(element);
            selection.removeAllRanges();
            selection.addRange(range);
        }
    };

    /**
     * set text of a jQuery element (required for IE),
     *
     * @name   helper.setElementText
     * @function
     * @param  {jQuery} $element - a jQuery element
     * @param  {string} text - the text to enter
     * @TODO check for XSS attacks, usually no CSS can prevent them so this looks weird on the first look
     */
    me.setElementText = function($element, text)
    {
        // For IE<10: Doesn't support white-space:pre-wrap; so we have to do this...
        if ($('#oldienotice').is(':visible')) {
            var html = me.htmlEntities(text).replace(/\n/ig, '\r\n<br>');
            $element.html('<pre>' + html + '</pre>');
        }
        // for other (sane) browsers:
        else
        {
            $element.text(text);
        }
    };

    /**
     * replace last child of element with message
     *
     * @name   helper.setMessage
     * @function
     * @param  {jQuery} $element - a jQuery wrapped DOM element
     * @param  {string} message - the message to append
     */
    me.setMessage = function($element, message)
    {
        var content = $element.contents();
        if (content.length > 0)
        {
            content[content.length - 1].nodeValue = ' ' + message;
        }
        else
        {
            me.setElementText($element, message);
        }
    };

    /**
     * convert URLs to clickable links.
     * URLs to handle:
     * <pre>
     *     magnet:?xt.1=urn:sha1:YNCKHTQCWBTRNJIV4WNAE52SJUQCZO5C&xt.2=urn:sha1:TXGCZQTH26NL6OUQAJJPFALHG2LTGBC7
     *     http://example.com:8800/zero/?6f09182b8ea51997#WtLEUO5Epj9UHAV9JFs+6pUQZp13TuspAUjnF+iM+dM=
     *     http://user:example.com@localhost:8800/zero/?6f09182b8ea51997#WtLEUO5Epj9UHAV9JFs+6pUQZp13TuspAUjnF+iM+dM=
     * </pre>
     *
     * @name   helper.urls2links
     * @function
     * @param  {Object} element - a jQuery DOM element
     */
    me.urls2links = function(element)
    {
        var markup = '<a href="$1" rel="nofollow">$1</a>';
        element.html(
            element.html().replace(
                /((http|https|ftp):\/\/[\w?=&.\/-;#@~%+-]+(?![\w\s?&.\/;#~%"=-]*>))/ig,
                markup
            )
        );
        element.html(
            element.html().replace(
                /((magnet):[\w?=&.\/-;#@~%+-]+)/ig,
                markup
            )
        );
    };

    /**
     * minimal sprintf emulation for %s and %d formats
     *
     * @see    {@link https://stackoverflow.com/questions/610406/javascript-equivalent-to-printf-string-format#4795914}
     * @name   helper.sprintf
     * @function
     * @param  {string} format
     * @param  {...*} args - one or multiple parameters injected into format string
     * @return {string}
     */
    me.sprintf = function()
    {
        var args = arguments;
        if (typeof arguments[0] === 'object')
        {
            args = arguments[0];
        }
        var format = args[0],
            i = 1;
        return format.replace(/%((%)|s|d)/g, function (m) {
            // m is the matched format, e.g. %s, %d
            var val;
            if (m[2]) {
                val = m[2];
            } else {
                val = args[i];
                // A switch statement so that the formatter can be extended.
                switch (m)
                {
                    case '%d':
                        val = parseFloat(val);
                        if (isNaN(val)) {
                            val = 0;
                        }
                        break;
                    default:
                        // Default is %s
                }
                ++i;
            }
            return val;
        });
    };

    /**
     * get value of cookie, if it was set, empty string otherwise
     *
     * @see    {@link http://www.w3schools.com/js/js_cookies.asp}
     * @name   helper.getCookie
     * @function
     * @param  {string} cname
     * @return {string}
     */
    me.getCookie = function(cname) {
        var name = cname + '=',
            ca = document.cookie.split(';');
        for (var i = 0; i < ca.length; ++i) {
            var c = ca[i];
            while (c.charAt(0) === ' ')
            {
                c = c.substring(1);
            }
            if (c.indexOf(name) === 0)
            {
                return c.substring(name.length, c.length);
            }
        }
        return '';
    };

    /**
     * get the current script location (without search or hash part of the URL),
     * eg. http://example.com/path/?aaaa#bbbb --> http://example.com/path/
     *
     * @name   helper.scriptLocation
     * @function
     * @return {string} current script location
     */
    me.scriptLocation = function()
    {
        // check for cached version
        if (scriptLocation !== null) {
            return scriptLocation;
        }

        scriptLocation = window.location.href.substring(
                0,
                window.location.href.length - window.location.search.length - window.location.hash.length
            );

        var hashIndex = scriptLocation.indexOf('?');

        if (hashIndex !== -1)
        {
            scriptLocation = scriptLocation.substring(0, hashIndex);
        }

        return scriptLocation;
    };

    /**
     * get the pastes unique identifier from the URL,
     * eg. http://example.com/path/?c05354954c49a487#c05354954c49a487 returns c05354954c49a487
     *
     * @name   helper.pasteId
     * @function
     * @return {string} unique identifier
     */
    me.pasteId = function()
    {
        return window.location.search.substring(1);
    };

    /**
     * return the deciphering key stored in anchor part of the URL
     *
     * @name   helper.pageKey
     * @function
     * @return {string} key
     */
    me.pageKey = function()
    {
        var key = window.location.hash.substring(1),
            i = key.indexOf('&');

        // Some web 2.0 services and redirectors add data AFTER the anchor
        // (such as &utm_source=...). We will strip any additional data.
        if (i > -1)
        {
            key = key.substring(0, i);
        }

        return key;
    };

    /**
     * convert all applicable characters to HTML entities
     *
     * @see    {@link https://www.owasp.org/index.php/XSS_(Cross_Site_Scripting)_Prevention_Cheat_Sheet#RULE_.231_-_HTML_Escape_Before_Inserting_Untrusted_Data_into_HTML_Element_Content}
     * @name   helper.htmlEntities
     * @function
     * @param  {string} str
     * @return {string} escaped HTML
     */
    me.htmlEntities = function(str) {
        return String(str).replace(
            /[&<>"'`=\/]/g, function(s) {
                return entityMap[s];
            });
    };

    return me;
})(window, document, jQuery, sjcl, Base64, RawDeflate);

/**
 * internationalization methods
 *
 * @param  {object} window
 * @param  {object} document
 * @name i18n
 * @class
 */
PrivateBin.i18n = (function (window, document, jQuery, sjcl, Base64, RawDeflate) {
    var me = {};

    /**
     * supported languages, minus the built in 'en'
     *
     * @private
     * @prop   {string[]}
     * @readonly
     */
    var supportedLanguages = ['de', 'es', 'fr', 'it', 'no', 'pl', 'oc', 'ru', 'sl', 'zh'];

    /**
     * built in language
     *
     * @private
     * @prop   {string}
     */
    var language = 'en';

    /**
     * translation cache
     *
     * @private
     * @enum   {Object}
     */
    var translations = {};

    /**
     * translate a string, alias for i18n.translate()
     *
     * @name   i18n._
     * @function
     * @param  {string} messageId
     * @param  {...*} args - one or multiple parameters injected into placeholders
     * @return {string}
     */
    me._ = function()
    {
        return me.translate(arguments);
    };

    /**
     * translate a string
     *
     * @name   i18n.translate
     * @function
     * @param  {string} messageId
     * @param  {...*} args - one or multiple parameters injected into placeholders
     * @return {string}
     */
    me.translate = function()
    {
        var args = arguments, messageId;
        if (typeof arguments[0] === 'object')
        {
            args = arguments[0];
        }
        var usesPlurals = $.isArray(args[0]);
        if (usesPlurals)
        {
            // use the first plural form as messageId, otherwise the singular
            messageId = (args[0].length > 1 ? args[0][1] : args[0][0]);
        }
        else
        {
            messageId = args[0];
        }
        if (messageId.length === 0)
        {
            return messageId;
        }
        if (!translations.hasOwnProperty(messageId))
        {
            if (language !== 'en')
            {
                console.error(
                    'Missing ' + language + ' translation for: ' + messageId
                );
            }
            translations[messageId] = args[0];
        }
        if (usesPlurals && $.isArray(translations[messageId]))
        {
            var n = parseInt(args[1] || 1, 10),
                key = me.getPluralForm(n),
                maxKey = translations[messageId].length - 1;
            if (key > maxKey)
            {
                key = maxKey;
            }
            args[0] = translations[messageId][key];
            args[1] = n;
        }
        else
        {
            args[0] = translations[messageId];
        }
        return helper.sprintf(args);
    };

    /**
     * per language functions to use to determine the plural form
     *
     * @see    {@link http://localization-guide.readthedocs.org/en/latest/l10n/pluralforms.html}
     * @name   i18n.getPluralForm
     * @function
     * @param  {number} n
     * @return {number} array key
     */
    me.getPluralForm = function(n) {
        switch (language)
        {
            case 'fr':
            case 'oc':
            case 'zh':
                return (n > 1 ? 1 : 0);
            case 'pl':
                return (n === 1 ? 0 : (n % 10 >= 2 && n %10 <=4 && (n % 100 < 10 || n % 100 >= 20) ? 1 : 2));
            case 'ru':
                return (n % 10 === 1 && n % 100 !== 11 ? 0 : (n % 10 >= 2 && n % 10 <= 4 && (n % 100 < 10 || n % 100 >= 20) ? 1 : 2));
            case 'sl':
                return (n % 100 === 1 ? 1 : (n % 100 === 2 ? 2 : (n % 100 === 3 || n % 100 === 4 ? 3 : 0)));
            // de, en, es, it, no
            default:
                return (n !== 1 ? 1 : 0);
        }
    };

    /**
     * load translations into cache, then trigger controller initialization
     *
     * @name   i18n.loadTranslations
     * @function
     */
    me.loadTranslations = function()
    {
        var newLanguage = PrivateBin.helper.getCookie('lang');

        // auto-select language based on browser settings
        if (newLanguage.length === 0)
        {
            newLanguage = (navigator.language || navigator.userLanguage).substring(0, 2);
        }

        // if language is already used (e.g, default 'en'), skip update
        if (newLanguage === language)
        {
            controller.init();
            return;
        }

        // if language is not supported, show error
        if (supportedLanguages.indexOf(newLanguage) === -1)
        {
            console.error('Language \'%s\' is not supported. Translation failed, fallback to English.', newLanguage);
            controller.init();
        }

        // load strongs from JSON
        $.getJSON('i18n/' + newLanguage + '.json', function(data) {
            language = newLanguage;
            translations = data;
        }).fail(function (data, textStatus, errorMsg) {
            console.error('Language \'%s\' could not be loaded (%s: %s). Translation failed, fallback to English.', newLanguage, textStatus, errorMsg);
        });

        controller.init();
    };

    return me;
})(window, document, jQuery, sjcl, Base64, RawDeflate);

/**
 * filter methods
 *
 * @param  {object} window
 * @param  {object} document
 * @name filter
 * @class
 */
PrivateBin.filter = (function (window, document, jQuery, sjcl, Base64, RawDeflate) {
    var me = {};

    /**
     * compress a message (deflate compression), returns base64 encoded data
     *
     * @name   filter.compress
     * @function
     * @param  {string} message
     * @return {string} base64 data
     */
    me.compress = function(message)
    {
        return Base64.toBase64( RawDeflate.deflate( Base64.utob(message) ) );
    };

    /**
     * decompress a message compressed with filter.compress()
     *
     * @name   filter.decompress
     * @function
     * @param  {string} data - base64 data
     * @return {string} message
     */
    me.decompress = function(data)
    {
        return Base64.btou( RawDeflate.inflate( Base64.fromBase64(data) ) );
    };

    /**
     * compress, then encrypt message with given key and password
     *
     * @name   filter.cipher
     * @function
     * @param  {string} key
     * @param  {string} password
     * @param  {string} message
     * @return {string} data - JSON with encrypted data
     */
    me.cipher = function(key, password, message)
    {
        // Galois Counter Mode, keysize 256 bit, authentication tag 128 bit
        var options = {mode: 'gcm', ks: 256, ts: 128};
        if ((password || '').trim().length === 0)
        {
            return sjcl.encrypt(key, me.compress(message), options);
        }
        return sjcl.encrypt(key + sjcl.codec.hex.fromBits(sjcl.hash.sha256.hash(password)), me.compress(message), options);
    };

    /**
     * decrypt message with key, then decompress
     *
     * @name   filter.decipher
     * @function
     * @param  {string} key
     * @param  {string} password
     * @param  {string} data - JSON with encrypted data
     * @return {string} decrypted message
     */
    me.decipher = function(key, password, data)
    {
        if (data !== undefined)
        {
            try
            {
                return me.decompress(sjcl.decrypt(key, data));
            }
            catch(err)
            {
                try
                {
                    return me.decompress(sjcl.decrypt(key + sjcl.codec.hex.fromBits(sjcl.hash.sha256.hash(password)), data));
                }
                catch(e)
                {
                    // ignore error, because ????? @TODO
                }
            }
        }
        return '';
    };

    return me;
})(window, document, jQuery, sjcl, Base64, RawDeflate);

/**
 * PrivateBin logic
 *
 * @param  {object} window
 * @param  {object} document
 * @name controller
 * @class
 */
PrivateBin.controller = (function (window, document, jQuery, sjcl, Base64, RawDeflate) {
    var me = {};

    /**
     * headers to send in AJAX requests
     *
     * @private
     * @enum   {Object}
     */
    var headers = {'X-Requested-With': 'JSONHttpRequest'};

    /**
     * URL shortners create address
     *
     * @private
     * @prop   {string}
     */
    var shortenerUrl = '';

    /**
     * URL of newly created paste
     *
     * @private
     * @prop   {string}
     */
    var createdPasteUrl = '';

    // jQuery pre-loaded objects
    var $attach,
        $attachment,
        $attachmentLink,
        $burnAfterReading,
        $burnAfterReadingOption,
        $cipherData,
        $clearText,
        $cloneButton,
        $clonedFile,
        $comments,
        $discussion,
        $errorMessage,
        $expiration,
        $fileRemoveButton,
        $fileWrap,
        $formatter,
        $image,
        $loadingIndicator,
        $message,
        $messageEdit,
        $messagePreview,
        $newButton,
        $openDisc, // @TODO: rename - too similar to openDiscussion, difference unclear
        $openDiscussion,
        $password,
        $passwordInput,
        $passwordModal,
        $passwordForm,
        $passwordDecrypt,
        $pasteResult,
        $pasteUrl,
        $prettyMessage,
        $prettyPrint,
        $preview,
        $rawTextButton,
        $remainingTime,
        $replyStatus,
        $sendButton,
        $status;

    /**
     * ask the user for the password and set it
     *
     * @name   controller.requestPassword
     * @function
     */
    me.requestPassword = function()
    {
        if ($passwordModal.length === 0) {
            var password = prompt(i18n._('Please enter the password for this paste:'), '');
            if (password === null)
            {
                throw 'password prompt canceled';
            }
            if (password.length === 0)
            {
                // recursive…
                me.requestPassword();
            } else {
                $passwordInput.val(password);
                me.displayMessages();
            }
        } else {
            $passwordModal.modal();
        }
    };

    /**
     * use given format on paste, defaults to plain text
     *
     * @name   controller.formatPaste
     * @function
     * @param  {string} format
     * @param  {string} text
     */
    me.formatPaste = function(format, text)
    {
        helper.setElementText($clearText, text);
        helper.setElementText($prettyPrint, text);

        switch (format || 'plaintext') {
            case 'markdown':
                // silently fail if showdown is not available
                // @TODO: maybe better show an error message? At least a warning?
                if (typeof showdown === 'object')
                {
                    var converter = new showdown.Converter({
                        strikethrough: true,
                        tables: true,
                        tablesHeaderId: true
                    });
                    $clearText.html(
                        converter.makeHtml(text)
                    );
                    // add table classes from bootstrap css
                    $clearText.find('table').addClass('table-condensed table-bordered');

                    $clearText.removeClass('hidden');
                } else {
                    console.error('showdown is not loaded, could not parse Markdown');
                }
                $prettyMessage.addClass('hidden');
                break;
            case 'syntaxhighlighting':
                // silently fail if prettyprint is not available
                // @TODO: maybe better show an error message? At least a warning?
                if (typeof prettyPrintOne === 'function')
                {
                    if (typeof prettyPrint === 'function')
                    {
                        prettyPrint();
                    }
                    $prettyPrint.html(
                        prettyPrintOne(
                            helper.htmlEntities(text), null, true
                        )
                    );
                } else {
                    console.error('pretty print is not loaded, could not link ');
                }
                // fall through, as the rest is the same
            default: // = 'plaintext'
                // convert URLs to clickable links
                helper.urls2links($clearText);
                helper.urls2links($prettyPrint);
                $clearText.addClass('hidden');


                $prettyPrint.css('white-space', 'pre-wrap');
                $prettyPrint.css('word-break', 'normal');
                $prettyPrint.removeClass('prettyprint');

                $prettyMessage.removeClass('hidden');
        }
    };

    /**
     * show decrypted text in the display area, including discussion (if open)
     *
     * @name   controller.displayMessages
     * @function
     * @param  {Object} [paste] - (optional) object including comments to display (items = array with keys ('data','meta'))
     */
    me.displayMessages = function(paste)
    {
        paste = paste || $.parseJSON($cipherData.text());
        var key = helper.pageKey(),
            password = $passwordInput.val();
        if (!$prettyPrint.hasClass('prettyprinted')) {
            // Try to decrypt the paste.
            try
            {
                if (paste.attachment)
                {
                    var attachment = filter.decipher(key, password, paste.attachment);
                    if (attachment.length === 0)
                    {
                        if (password.length === 0)
                        {
                            me.requestPassword();
                            return;
                        }
                        attachment = filter.decipher(key, password, paste.attachment);
                    }
                    if (attachment.length === 0)
                    {
                        throw 'failed to decipher attachment';
                    }

                    if (paste.attachmentname)
                    {
                        var attachmentname = filter.decipher(key, password, paste.attachmentname);
                        if (attachmentname.length > 0)
                        {
                            $attachmentLink.attr('download', attachmentname);
                        }
                    }
                    $attachmentLink.attr('href', attachment);
                    $attachment.removeClass('hidden');

                    // if the attachment is an image, display it
                    var imagePrefix = 'data:image/';
                    if (attachment.substring(0, imagePrefix.length) === imagePrefix)
                    {
                        $image.html(
                            $(document.createElement('img'))
                                .attr('src', attachment)
                                .attr('class', 'img-thumbnail')
                        );
                        $image.removeClass('hidden');
                    }
                }
                var cleartext = filter.decipher(key, password, paste.data);
                if (cleartext.length === 0 && password.length === 0 && !paste.attachment)
                {
                    me.requestPassword();
                    return;
                }
                if (cleartext.length === 0 && !paste.attachment)
                {
                    throw 'failed to decipher message';
                }

                $passwordInput.val(password);
                if (cleartext.length > 0)
                {
                    $('#pasteFormatter').val(paste.meta.formatter);
                    me.formatPaste(paste.meta.formatter, cleartext);
                }
            }
            catch(err)
            {
                me.stateOnlyNewPaste();
                me.showError(i18n._('Could not decrypt data (Wrong key?)'));
                return;
            }
        }

        // display paste expiration / for your eyes only
        if (paste.meta.expire_date)
        {
            var expiration = helper.secondsToHuman(paste.meta.remaining_time),
                expirationLabel = [
                    'This document will expire in %d ' + expiration[1] + '.',
                    'This document will expire in %d ' + expiration[1] + 's.'
                ];
            helper.setMessage($remainingTime, i18n._(expirationLabel, expiration[0]));
            $remainingTime.removeClass('foryoureyesonly')
                              .removeClass('hidden');
        }
        if (paste.meta.burnafterreading)
        {
            // unfortunately many web servers don't support DELETE (and PUT) out of the box
            $.ajax({
                type: 'POST',
                url: helper.scriptLocation() + '?' + helper.pasteId(),
                data: {deletetoken: 'burnafterreading'},
                dataType: 'json',
                headers: headers
            })
            .fail(function() {
                controller.showError(i18n._('Could not delete the paste, it was not stored in burn after reading mode.'));
            });
            helper.setMessage($remainingTime, i18n._(
                'FOR YOUR EYES ONLY. Don\'t close this window, this message can\'t be displayed again.'
            ));
            $remainingTime.addClass('foryoureyesonly')
                              .removeClass('hidden');
            // discourage cloning (as it can't really be prevented)
            $cloneButton.addClass('hidden');
        }

        // if the discussion is opened on this paste, display it
        if (paste.meta.opendiscussion)
        {
            $comments.html('');

            var $divComment;

            // iterate over comments
            for (var i = 0; i < paste.comments.length; ++i)
            {
                var $place = $comments,
                    comment = paste.comments[i],
                    commentText = filter.decipher(key, password, comment.data),
                    $parentComment = $('#comment_' + comment.parentid);

                $divComment = $('<article><div class="comment" id="comment_' + comment.id
                           + '"><div class="commentmeta"><span class="nickname"></span>'
                           + '<span class="commentdate"></span></div>'
                           + '<div class="commentdata"></div>'
                           + '<button class="btn btn-default btn-sm">'
                           + i18n._('Reply') + '</button></div></article>');
                var $divCommentData = $divComment.find('div.commentdata');

                // if parent comment exists
                if ($parentComment.length)
                {
                    // shift comment to the right
                    $place = $parentComment;
                }
                $divComment.find('button').click({commentid: comment.id}, me.openReply);
                helper.setElementText($divCommentData, commentText);
                helper.urls2links($divCommentData);

                // try to get optional nickname
                var nick = filter.decipher(key, password, comment.meta.nickname);
                if (nick.length > 0)
                {
                    $divComment.find('span.nickname').text(nick);
                }
                else
                {
                    divComment.find('span.nickname').html('<i>' + i18n._('Anonymous') + '</i>');
                }
                $divComment.find('span.commentdate')
                          .text(' (' + (new Date(comment.meta.postdate * 1000).toLocaleString()) + ')')
                          .attr('title', 'CommentID: ' + comment.id);

                // if an avatar is available, display it
                if (comment.meta.vizhash)
                {
                    $divComment.find('span.nickname')
                              .before(
                                '<img src="' + comment.meta.vizhash + '" class="vizhash" title="' +
                                i18n._('Anonymous avatar (Vizhash of the IP address)') + '" /> '
                              );
                }

                $place.append($divComment);
            }

            // add 'add new comment' area
            $divComment = $(
                '<div class="comment"><button class="btn btn-default btn-sm">' +
                i18n._('Add comment') + '</button></div>'
            );
            $divComment.find('button').click({commentid: helper.pasteId()}, me.openReply);
            $comments.append($divComment);
            $discussion.removeClass('hidden');
        }
    };

    /**
     * open the comment entry when clicking the "Reply" button of a comment
     *
     * @name   controller.openReply
     * @function
     * @param  {Event} event
     */
    me.openReply = function(event)
    {
        event.preventDefault();

        // remove any other reply area
        $('div.reply').remove();

        var source = $(event.target),
            commentid = event.data.commentid,
            hint = i18n._('Optional nickname...'),
            reply = $(
                '<div class="reply"><input type="text" id="nickname" ' +
                'class="form-control" title="' + hint + '" placeholder="' +
                hint + '" /><textarea id="replymessage" class="replymessage ' +
                'form-control" cols="80" rows="7"></textarea><br />' +
                '<div id="replystatus"></div><button id="replybutton" ' +
                'class="btn btn-default btn-sm">' + i18n._('Post comment') +
                '</button></div>'
            );
        reply.find('button').click(
            {parentid: commentid},
            me.sendComment
        );
        source.after(reply);
        $replyStatus = $('#replystatus');
        $('#replymessage').focus();
    };

    /**
     * send a reply in a discussion
     *
     * @name   controller.sendComment
     * @function
     * @param  {Event} event
     */
    me.sendComment = function(event)
    {
        event.preventDefault();
        $errorMessage.addClass('hidden');
        // do not send if no data
        var replyMessage = $('#replymessage');
        if (replyMessage.val().length === 0)
        {
            return;
        }

        me.showStatus(i18n._('Sending comment...'), true);
        var parentid = event.data.parentid,
            key = helper.pageKey(),
            cipherdata = filter.cipher(key, $passwordInput.val(), replyMessage.val()),
            ciphernickname = '',
            nick = $('#nickname').val();
        if (nick.length > 0)
        {
            ciphernickname = filter.cipher(key, $passwordInput.val(), nick);
        }
        var data_to_send = {
            data:     cipherdata,
            parentid: parentid,
            pasteid:  helper.pasteId(),
            nickname: ciphernickname
        };

        $.ajax({
            type: 'POST',
            url: helper.scriptLocation(),
            data: data_to_send,
            dataType: 'json',
            headers: headers,
            success: function(data)
            {
                if (data.status === 0)
                {
                    controller.showStatus(i18n._('Comment posted.'));
                    $.ajax({
                        type: 'GET',
                        url: helper.scriptLocation() + '?' + helper.pasteId(),
                        dataType: 'json',
                        headers: headers,
                        success: function(data)
                        {
                            if (data.status === 0)
                            {
                                controller.displayMessages(data);
                            }
                            else if (data.status === 1)
                            {
                                controller.showError(i18n._('Could not refresh display: %s', data.message));
                            }
                            else
                            {
                                controller.showError(i18n._('Could not refresh display: %s', i18n._('unknown status')));
                            }
                        }
                    })
                    .fail(function() {
                        controller.showError(i18n._('Could not refresh display: %s', i18n._('server error or not responding')));
                    });
                }
                else if (data.status === 1)
                {
                    controller.showError(i18n._('Could not post comment: %s', data.message));
                }
                else
                {
                    controller.showError(i18n._('Could not post comment: %s', i18n._('unknown status')));
                }
            }
        })
        .fail(function() {
            controller.showError(i18n._('Could not post comment: %s', i18n._('server error or not responding')));
        });
    };

    /**
     * send a new paste to server
     *
     * @name   controller.sendData
     * @function
     * @param  {Event} event
     */
    me.sendData = function(event)
    {
        event.preventDefault();
        var file = document.getElementById('file'),
            files = (file && file.files) ? file.files : null; // FileList object

        // do not send if no data.
        if ($message.val().length === 0 && !(files && files[0]))
        {
            return;
        }

        // if sjcl has not collected enough entropy yet, display a message
        if (!sjcl.random.isReady())
        {
            me.showStatus(i18n._('Sending paste (Please move your mouse for more entropy)...'), true);
            sjcl.random.addEventListener('seeded', function() {
                me.sendData(event);
            });
            return;
        }

        $('.navbar-toggle').click();
        $password.addClass('hidden');
        me.showStatus(i18n._('Sending paste...'), true);

        me.stateSubmittingPaste();

        var randomkey = sjcl.codec.base64.fromBits(sjcl.random.randomWords(8, 0), 0),
            password = $passwordInput.val();
        if(files && files[0])
        {
            if(typeof FileReader === undefined)
            {
                // revert loading status…
                me.stateNewPaste();
                me.showError(i18n._('Your browser does not support uploading encrypted files. Please use a newer browser.'));
                return;
            }
            var reader = new FileReader();
            // closure to capture the file information
            reader.onload = (function(theFile)
            {
                return function(e) {
                    controller.sendDataContinue(
                        randomkey,
                        filter.cipher(randomkey, password, e.target.result),
                        filter.cipher(randomkey, password, theFile.name)
                    );
                };
            })(files[0]);
            reader.readAsDataURL(files[0]);
        }
        else if($attachmentLink.attr('href'))
        {
            me.sendDataContinue(
                randomkey,
                filter.cipher(randomkey, password, $attachmentLink.attr('href')),
                $attachmentLink.attr('download')
            );
        }
        else
        {
            me.sendDataContinue(randomkey, '', '');
        }
    };

    /**
     * send a new paste to server, step 2
     *
     * @name   controller.sendDataContinue
     * @function
     * @param  {string} randomkey
     * @param  {string} cipherdata_attachment
     * @param  {string} cipherdata_attachment_name
     */
    me.sendDataContinue = function(randomkey, cipherdata_attachment, cipherdata_attachment_name)
    {
        var cipherdata = filter.cipher(randomkey, $passwordInput.val(), $message.val()),
            data_to_send = {
                data:             cipherdata,
                expire:           $('#pasteExpiration').val(),
                formatter:        $('#pasteFormatter').val(),
                burnafterreading: $burnAfterReading.is(':checked') ? 1 : 0,
                opendiscussion:   $openDiscussion.is(':checked') ? 1 : 0
            };
        if (cipherdata_attachment.length > 0)
        {
            data_to_send.attachment = cipherdata_attachment;
            if (cipherdata_attachment_name.length > 0)
            {
                data_to_send.attachmentname = cipherdata_attachment_name;
            }
        }
        $.ajax({
            type: 'POST',
            url: helper.scriptLocation(),
            data: data_to_send,
            dataType: 'json',
            headers: headers,
            success: function(data)
            {
                if (data.status === 0) {
                    me.stateExistingPaste();
                    var url = helper.scriptLocation() + '?' + data.id + '#' + randomkey,
                        deleteUrl = helper.scriptLocation() + '?pasteid=' + data.id + '&deletetoken=' + data.deletetoken;
                    me.showStatus('');
                    $errorMessage.addClass('hidden');
                    // show new URL in browser bar
                    history.pushState({type: 'newpaste'}, document.title, url);

                    $('#pastelink').html(
                        i18n._(
                            'Your paste is <a id="pasteurl" href="%s">%s</a> <span id="copyhint">(Hit [Ctrl]+[c] to copy)</span>',
                            url, url
                        ) + me.shortenUrl(url)
                    );
                    // save newly created element
                    $pasteUrl = $('#pasteurl');
                    // and add click event
                    $pasteUrl.click(me.pasteLinkClick);

                    var shortenButton = $('#shortenbutton');
                    if (shortenButton) {
                        shortenButton.click(me.sendToShortener);
                    }
                    $('#deletelink').html('<a href="' + deleteUrl + '">' + i18n._('Delete data') + '</a>');
                    $pasteResult.removeClass('hidden');
                    // we pre-select the link so that the user only has to [Ctrl]+[c] the link
                    helper.selectText($pasteUrl[0]);
                    me.showStatus('');
                    me.formatPaste(data_to_send.formatter, $message.val());
                }
                else if (data.status === 1)
                {
                    // revert loading status…
                    controller.stateNewPaste();
                    controller.showError(i18n._('Could not create paste: %s', data.message));
                }
                else
                {
                    // revert loading status…
                    controller.stateNewPaste();
                    controller.showError(i18n._('Could not create paste: %s', i18n._('unknown status')));
                }
            }
        })
        .fail(function()
        {
            // revert loading status…
            me.stateNewPaste();
            controller.showError(i18n._('Could not create paste: %s', i18n._('server error or not responding')));
        });
    };

    /**
     * check if a URL shortener was defined and create HTML containing a link to it
     *
     * @name   controller.shortenUrl
     * @function
     * @param  {string} url
     * @return {string} html
     */
    me.shortenUrl = function(url)
    {
        var shortenerHtml = $('#shortenbutton');
        if (shortenerHtml) {
            shortenerUrl = shortenerHtml.data('shortener');
            createdPasteUrl = url;
            return ' ' + $('<div />').append(shortenerHtml.clone()).html();
        }
        return '';
    };

    /**
     * put the screen in "New paste" mode
     *
     * @name   controller.stateNewPaste
     * @function
     */
    me.stateNewPaste = function()
    {
        $message.text('');
        $attachment.addClass('hidden');
        $cloneButton.addClass('hidden');
        $rawTextButton.addClass('hidden');
        $remainingTime.addClass('hidden');
        $pasteResult.addClass('hidden');
        $clearText.addClass('hidden');
        $discussion.addClass('hidden');
        $prettyMessage.addClass('hidden');
        $loadingIndicator.addClass('hidden');
        $sendButton.removeClass('hidden');
        $expiration.removeClass('hidden');
        $formatter.removeClass('hidden');
        $burnAfterReadingOption.removeClass('hidden');
        $openDisc.removeClass('hidden');
        $newButton.removeClass('hidden');
        $password.removeClass('hidden');
        $attach.removeClass('hidden');
        $message.removeClass('hidden');
        $preview.removeClass('hidden');
        $message.focus();
    };

    /**
     * put the screen in mode after submitting a paste
     *
     * @name   controller.stateSubmittingPaste
     * @function
     */
    me.stateSubmittingPaste = function()
    {
        $message.text('');
        $attachment.addClass('hidden');
        $cloneButton.addClass('hidden');
        $rawTextButton.addClass('hidden');
        $remainingTime.addClass('hidden');
        $pasteResult.addClass('hidden');
        $clearText.addClass('hidden');
        $discussion.addClass('hidden');
        $prettyMessage.addClass('hidden');
        $sendButton.addClass('hidden');
        $expiration.addClass('hidden');
        $formatter.addClass('hidden');
        $burnAfterReadingOption.addClass('hidden');
        $openDisc.addClass('hidden');
        $newButton.addClass('hidden');
        $password.addClass('hidden');
        $attach.addClass('hidden');
        $message.addClass('hidden');
        $preview.addClass('hidden');

        $loadingIndicator.removeClass('hidden');
    };

    /**
     * put the screen in a state where the only option is to submit a
     * new paste
     *
     * @name   controller.stateOnlyNewPaste
     * @function
     */
    me.stateOnlyNewPaste = function()
    {
        $message.text('');
        $attachment.addClass('hidden');
        $cloneButton.addClass('hidden');
        $rawTextButton.addClass('hidden');
        $remainingTime.addClass('hidden');
        $pasteResult.addClass('hidden');
        $clearText.addClass('hidden');
        $discussion.addClass('hidden');
        $prettyMessage.addClass('hidden');
        $sendButton.addClass('hidden');
        $expiration.addClass('hidden');
        $formatter.addClass('hidden');
        $burnAfterReadingOption.addClass('hidden');
        $openDisc.addClass('hidden');
        $password.addClass('hidden');
        $attach.addClass('hidden');
        $message.addClass('hidden');
        $preview.addClass('hidden');
        $loadingIndicator.addClass('hidden');

        $newButton.removeClass('hidden');
    };

    /**
     * put the screen in "Existing paste" mode
     *
     * @name   controller.stateExistingPaste
     * @function
     * @param  {boolean} [preview=false] - (optional) tell if the preview tabs should be displayed, defaults to false
     */
    me.stateExistingPaste = function(preview)
    {
        preview = preview || false;

        if (!preview)
        {
            // no "clone" for IE<10.
            if ($('#oldienotice').is(":visible"))
            {
                $cloneButton.addClass('hidden');
            }
            else
            {
                $cloneButton.removeClass('hidden');
            }

            $rawTextButton.removeClass('hidden');
            $sendButton.addClass('hidden');
            $attach.addClass('hidden');
            $expiration.addClass('hidden');
            $formatter.addClass('hidden');
            $burnAfterReadingOption.addClass('hidden');
            $openDisc.addClass('hidden');
            $newButton.removeClass('hidden');
            $preview.addClass('hidden');
        }

        $pasteResult.addClass('hidden');
        $message.addClass('hidden');
        $clearText.addClass('hidden');
        $prettyMessage.addClass('hidden');
        $loadingIndicator.addClass('hidden');
    };

    /**
     * when "burn after reading" is checked, disable discussion
     *
     * @name   controller.changeBurnAfterReading
     * @function
     */
    me.changeBurnAfterReading = function()
    {
        if ($burnAfterReading.is(':checked') )
        {
            $openDisc.addClass('buttondisabled');
            $openDiscussion.attr({checked: false, disabled: true});
        }
        else
        {
            $openDisc.removeClass('buttondisabled');
            $openDiscussion.removeAttr('disabled');
        }
    };

    /**
     * when discussion is checked, disable "burn after reading"
     *
     * @name   controller.changeOpenDisc
     * @function
     */
    me.changeOpenDisc = function()
    {
        if ($openDiscussion.is(':checked') )
        {
            $burnAfterReadingOption.addClass('buttondisabled');
            $burnAfterReading.attr({checked: false, disabled: true});
        }
        else
        {
            $burnAfterReadingOption.removeClass('buttondisabled');
            $burnAfterReading.removeAttr('disabled');
        }
    };

    /**
     * forward to URL shortener
     *
     * @name   controller.sendToShortener
     * @function
     * @param  {Event} event
     */
    me.sendToShortener = function(event)
    {
        window.location.href = shortenerUrl + encodeURIComponent(createdPasteUrl);
        event.preventDefault();
    };

    /**
     * reload the page
     *
     * This takes the user to the PrivateBin home page.
     *
     * @name   controller.reloadPage
     * @function
     * @param  {Event} event
     */
    me.reloadPage = function(event)
    {
        window.location.href = helper.scriptLocation();
        event.preventDefault();
    };

    /**
     * return raw text
     *
     * @name   controller.rawText
     * @function
     * @param  {Event} event
     */
    me.rawText = function(event)
    {
        var paste = $('#pasteFormatter').val() === 'markdown' ?
            $prettyPrint.text() : $clearText.text();
        history.pushState(
            null, document.title, helper.scriptLocation() + '?' +
            helper.pasteId() + '#' + helper.pageKey()
        );
        // we use text/html instead of text/plain to avoid a bug when
        // reloading the raw text view (it reverts to type text/html)
        var newDoc = document.open('text/html', 'replace');
        newDoc.write('<pre>' + helper.htmlEntities(paste) + '</pre>');
        newDoc.close();

        event.preventDefault();
    };

    /**
     * clone the current paste
     *
     * @name   controller.clonePaste
     * @function
     * @param  {Event} event
     */
    me.clonePaste = function(event)
    {
        event.preventDefault();
        me.stateNewPaste();

        // erase the id and the key in url
        history.replaceState(null, document.title, helper.scriptLocation());

        me.showStatus('');
        if ($attachmentLink.attr('href'))
        {
            $clonedFile.removeClass('hidden');
            $fileWrap.addClass('hidden');
        }
        $message.text(
            $('#pasteFormatter').val() === 'markdown' ?
                $prettyPrint.text() : $clearText.text()
        );
        $('.navbar-toggle').click();
    };

    /**
     * set the expiration on bootstrap templates
     *
     * @name   controller.setExpiration
     * @function
     * @param  {Event} event
     */
    me.setExpiration = function(event)
    {
        event.preventDefault();
        var target = $(event.target);
        $('#pasteExpiration').val(target.data('expiration'));
        $('#pasteExpirationDisplay').text(target.text());
    };

    /**
     * set the format on bootstrap templates
     *
     * @name   controller.setFormat
     * @function
     * @param  {Event} event
     */
    me.setFormat = function(event)
    {
        var target = $(event.target);
        $('#pasteFormatter').val(target.data('format'));
        $('#pasteFormatterDisplay').text(target.text());

        if ($messagePreview.parent().hasClass('active')) {
            me.viewPreview(event);
        }
        event.preventDefault();
    };

    /**
     * set the language in a cookie and reload the page
     *
     * @name   controller.setLanguage
     * @function
     * @param  {Event} event
     */
    me.setLanguage = function(event)
    {
        document.cookie = 'lang=' + $(event.target).data('lang');
        me.reloadPage(event);
    };

    /**
     * support input of tab character
     *
     * @name   controller.supportTabs
     * @function
     * @param  {Event} event
     * @TODO doc what is @this here?
     */
    me.supportTabs = function(event)
    {
        var keyCode = event.keyCode || event.which;
        // tab was pressed
        if (keyCode === 9)
        {
            // prevent the textarea to lose focus
            event.preventDefault();
            // get caret position & selection
            var val   = this.value,
                start = this.selectionStart,
                end   = this.selectionEnd;
            // set textarea value to: text before caret + tab + text after caret
            this.value = val.substring(0, start) + '\t' + val.substring(end);
            // put caret at right position again
            this.selectionStart = this.selectionEnd = start + 1;
        }
    };

    /**
     * view the editor tab
     *
     * @name   controller.viewEditor
     * @function
     * @param  {Event} event
     */
    me.viewEditor = function(event)
    {
        $messagePreview.parent().removeClass('active');
        $messageEdit.parent().addClass('active');
        $message.focus();
        me.stateNewPaste();

        event.preventDefault();
    };

    /**
     * view the preview tab
     *
     * @name   controller.viewPreview
     * @function
     * @param  {Event} event
     */
    me.viewPreview = function(event)
    {
        $messageEdit.parent().removeClass('active');
        $messagePreview.parent().addClass('active');
        $message.focus();
        me.stateExistingPaste(true);
        me.formatPaste($('#pasteFormatter').val(), $message.val());

        event.preventDefault();
    };

    /**
     * handle history (pop) state changes
     *
     * currently this does only handle redirects to the home page.
     *
     * @name   controller.historyChange
     * @function
     * @param  {Event} event
     */
    me.historyChange = function(event)
    {
        var currentLocation = helper.scriptLocation();
        if (event.originalEvent.state === null && // no state object passed
            event.originalEvent.target.location.href === currentLocation && // target location is home page
            window.location.href === currentLocation // and we are not already on the home page
        ) {
            // redirect to home page
            window.location.href = currentLocation;
        }
    };

    /**
     * Forces opening the paste if the link does not do this automatically.
     *
     * This is necessary as browsers will not reload the page when it is
     * already loaded (which is fake as it is set via history.pushState()).
     *
     * @name   controller.pasteLinkClick
     * @function
     * @param  {Event} event
     */
    me.pasteLinkClick = function(event)
    {
        // check if location is (already) shown in URL bar
        if (window.location.href === $pasteUrl.attr('href')) {
            // if so we need to load link by reloading the current site
            window.location.reload(true);
        }
    };

    /**
     * create a new paste
     *
     * @name   controller.newPaste
     * @function
     */
    me.newPaste = function()
    {
        me.stateNewPaste();
        me.showStatus('');
        $message.text('');
        me.changeBurnAfterReading();
        me.changeOpenDisc();
    };

    /**
     * removes an attachment
     *
     * @name   controller.removeAttachment
     * @function
     */
    me.removeAttachment = function()
    {
        $clonedFile.addClass('hidden');
        // removes the saved decrypted file data
        $attachmentLink.attr('href', '');
        // the only way to deselect the file is to recreate the input // @TODO really?
        $fileWrap.html($fileWrap.html());
        $fileWrap.removeClass('hidden');
    };

    /**
     * decrypt using the password from the modal dialog
     *
     * @name   controller.decryptPasswordModal
     * @function
     */
    me.decryptPasswordModal = function()
    {
        $passwordInput.val($passwordDecrypt.val());
        me.displayMessages();
    };

    /**
     * submit a password in the modal dialog
     *
     * @name   controller.submitPasswordModal
     * @function
     * @param  {Event} event
     */
    me.submitPasswordModal = function(event)
    {
        event.preventDefault();
        $passwordModal.modal('hide');
    };

    /**
     * display an error message,
     * we use the same function for paste and reply to comments
     *
     * @name   controller.showError
     * @function
     * @param  {string} message - text to display
     */
    me.showError = function(message)
    {
        if ($status.length)
        {
            $status.addClass('errorMessage').text(message);
        }
        else
        {
            $errorMessage.removeClass('hidden');
            helper.setMessage($errorMessage, message);
        }
        if (typeof $replyStatus !== 'undefined') {
            $replyStatus.addClass('errorMessage');
            $replyStatus.addClass($errorMessage.attr('class'));
            if ($status.length)
            {
                $replyStatus.html($status.html());
            }
            else
            {
                $replyStatus.html($errorMessage.html());
            }
        }
    };

    /**
     * display a status message,
     * we use the same function for paste and reply to comments
     *
     * @name   controller.showStatus
     * @function
     * @param  {string} message - text to display
     * @param  {boolean} [spin=false] - (optional) tell if the "spinning" animation should be displayed, defaults to false
     */
    me.showStatus = function(message, spin)
    {
        if (spin || false)
        {
            var img = '<img src="img/busy.gif" style="width:16px;height:9px;margin:0 4px 0 0;" />';
            $status.prepend(img);
            if (typeof $replyStatus !== 'undefined') {
                $replyStatus.prepend(img);
            }
        }
        if (typeof $replyStatus !== 'undefined') {
            $replyStatus.removeClass('errorMessage').text(message);
        }
        if (!message)
        {
            $status.html(' ');
            return;
        }
        if (message === '')
        {
            $status.html(' ');
            return;
        }
        $status.removeClass('errorMessage').text(message);
    };

    /**
     * bind events to DOM elements
     *
     * @private
     * @function
     */
    function bindEvents()
    {
        $burnAfterReading.change(me.changeBurnAfterReading);
        $openDisc.change(me.changeOpenDisc);
        $sendButton.click(me.sendData);
        $cloneButton.click(me.clonePaste);
        $rawTextButton.click(me.rawText);
        $fileRemoveButton.click(me.removeAttachment);
        $('.reloadlink').click(me.reloadPage);
        $message.keydown(me.supportTabs);
        $messageEdit.click(me.viewEditor);
        $messagePreview.click(me.viewPreview);

        // bootstrap template drop downs
        $('ul.dropdown-menu li a', $('#expiration').parent()).click(me.setExpiration);
        $('ul.dropdown-menu li a', $('#formatter').parent()).click(me.setFormat);
        $('#language ul.dropdown-menu li a').click(me.setLanguage);

        // page template drop down
        $('#language select option').click(me.setLanguage);

        // focus password input when it is shown
        $passwordModal.on('shown.bs.modal', function () {
            $passwordDecrypt.focus();
        });
        // handle modal password request on decryption
        $passwordModal.on('hidden.bs.modal', me.decryptPasswordModal);
        $passwordForm.submit(me.submitPasswordModal);

        $(window).on('popstate', me.historyChange);
    }

    /**
     * main application
     *
     * @name   controller.init
     * @function
     */
    me.init = function()
    {
        // hide "no javascript" message
        $('#noscript').hide();

        // preload jQuery wrapped DOM elements and bind events
        $attach = $('#attach');
        $attachment = $('#attachment');
        $attachmentLink = $('#attachment a');
        $burnAfterReading = $('#burnafterreading');
        $burnAfterReadingOption = $('#burnafterreadingoption');
        $cipherData = $('#cipherdata');
        $clearText = $('#cleartext');
        $cloneButton = $('#clonebutton');
        $clonedFile = $('#clonedfile');
        $comments = $('#comments');
        $discussion = $('#discussion');
        $errorMessage = $('#errormessage');
        $expiration = $('#expiration');
        $fileRemoveButton = $('#fileremovebutton');
        $fileWrap = $('#filewrap');
        $formatter = $('#formatter');
        $image = $('#image');
        $loadingIndicator = $('#loadingindicator');
        $message = $('#message');
        $messageEdit = $('#messageedit');
        $messagePreview = $('#messagepreview');
        $newButton = $('#newbutton');
        $openDisc = $('#opendisc');
        $openDiscussion = $('#opendiscussion');
        $password = $('#password');
        $passwordInput = $('#passwordinput');
        $passwordModal = $('#passwordmodal');
        $passwordForm = $('#passwordform');
        $passwordDecrypt = $('#passworddecrypt');
        $pasteResult = $('#pasteresult');
        // $pasteUrl is saved in sendDataContinue() if/after it is
        // actually created
        $prettyMessage = $('#prettymessage');
        $prettyPrint = $('#prettyprint');
        $preview = $('#preview');
        $rawTextButton = $('#rawtextbutton');
        $remainingTime = $('#remainingtime');
        // $replyStatus is saved in openReply()
        $sendButton = $('#sendbutton');
        $status = $('#status');
        bindEvents();

        // display status returned by php code, if any (eg. paste was properly deleted)
        if ($status.text().length > 0)
        {
            me.showStatus($status.text());
            return;
        }

        // keep line height even if content empty
        $status.html(' ');

        // display an existing paste
        if ($cipherData.text().length > 1)
        {
            // missing decryption key in URL?
            if (window.location.hash.length === 0)
            {
                me.showError(i18n._('Cannot decrypt paste: Decryption key missing in URL (Did you use a redirector or an URL shortener which strips part of the URL?)'));
                return;
            }

            // show proper elements on screen
            me.stateExistingPaste();
            me.displayMessages();
        }
        // display error message from php code
        else if ($errorMessage.text().length > 1)
        {
            me.showError($errorMessage.text());
        }
        // create a new paste
        else
        {
            me.newPaste();
        }
    };

    return me;
})(window, document, jQuery, sjcl, Base64, RawDeflate);