/**
* 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 1.1.1
* @name PrivateBin
* @namespace
*/
/** global: Base64 */
/** global: DOMPurify */
/** global: FileReader */
/** global: RawDeflate */
/** global: history */
/** global: navigator */
/** global: prettyPrint */
/** global: prettyPrintOne */
/** global: showdown */
/** global: sjcl */
/** global: kjua */
// Immediately start random number generator collector.
sjcl.random.startCollectors();
// main application start, called when DOM is fully loaded
jQuery(document).ready(function() {
// run main controller
$.PrivateBin.Controller.init();
});
jQuery.PrivateBin = function($, sjcl, Base64, RawDeflate) {
'use strict';
/**
* static Helper methods
*
* @name Helper
* @class
*/
var Helper = (function () {
var me = {};
/**
* cache for script location
*
* @name Helper.baseUri
* @private
* @enum {string|null}
*/
var baseUri = 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();
} else if (window.getSelection) {
selection = window.getSelection();
range = document.createRange();
range.selectNodeContents(element);
selection.removeAllRanges();
selection.addRange(range);
}
}
/**
* 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 {string} html
* @return {string}
*/
me.urls2links = function(html)
{
return html.replace(
/(((http|https|ftp):\/\/[\w?=&.\/-;#@~%+*-]+(?![\w\s?&.\/;#~%"=-]*>))|((magnet):[\w?=&.\/-;#@~%+*-]+))/ig,
'<a href="$1" rel="nofollow">$1</a>'
);
}
/**
* minimal sprintf emulation for %s and %d formats
*
* Note that this function needs the parameters in the same order as the
* format strings appear in the string, contrary to the original.
*
* @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 = Array.prototype.slice.call(arguments);
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 = 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 - may not be empty
* @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 location (without search or hash part of the URL),
* eg. http://example.com/path/?aaaa#bbbb --> http://example.com/path/
*
* @name Helper.baseUri
* @function
* @return {string}
*/
me.baseUri = function()
{
// check for cached version
if (baseUri !== null) {
return baseUri;
}
baseUri = window.location.origin + window.location.pathname;
return baseUri;
}
/**
* resets state, used for unit testing
*
* @name Helper.reset
* @function
*/
me.reset = function()
{
baseUri = null;
}
return me;
})();
/**
* internationalization module
*
* @name I18n
* @class
*/
var I18n = (function () {
var me = {};
/**
* const for string of loaded language
*
* @name I18n.languageLoadedEvent
* @private
* @prop {string}
* @readonly
*/
var languageLoadedEvent = 'languageLoaded';
/**
* supported languages, minus the built in 'en'
*
* @name I18n.supportedLanguages
* @private
* @prop {string[]}
* @readonly
*/
var supportedLanguages = ['de', 'es', 'fr', 'it', 'no', 'pl', 'pt', 'oc', 'ru', 'sl', 'zh'];
/**
* built in language
*
* @name I18n.language
* @private
* @prop {string|null}
*/
var language = null;
/**
* translation cache
*
* @name I18n.translations
* @private
* @enum {Object}
*/
var translations = {};
/**
* translate a string, alias for I18n.translate
*
* @name I18n._
* @function
* @param {jQuery} $element - optional
* @param {string} messageId
* @param {...*} args - one or multiple parameters injected into placeholders
* @return {string}
*/
me._ = function()
{
return me.translate.apply(this, arguments);
}
/**
* translate a string
*
* Optionally pass a jQuery element as the first parameter, to automatically
* let the text of this element be replaced. In case the (asynchronously
* loaded) language is not downloadet yet, this will make sure the string
* is replaced when it is actually loaded.
* So for easy translations passing the jQuery object to apply it to is
* more save, especially when they are loaded in the beginning.
*
* @name I18n.translate
* @function
* @param {jQuery} $element - optional
* @param {string} messageId
* @param {...*} args - one or multiple parameters injected into placeholders
* @return {string}
*/
me.translate = function()
{
// convert parameters to array
var args = Array.prototype.slice.call(arguments),
messageId,
$element = null;
// parse arguments
if (args[0] instanceof jQuery) {
// optional jQuery element as first parameter
$element = args[0];
args.shift();
}
// extract messageId from arguments
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 no translation string cannot be found (in translations object)
if (!translations.hasOwnProperty(messageId) || language === null) {
// if language is still loading and we have an elemt assigned
if (language === null && $element !== null) {
// handle the error by attaching the language loaded event
var orgArguments = arguments;
$(document).on(languageLoadedEvent, function () {
// log to show that the previous error could be mitigated
console.warn('Fix missing translation of \'' + messageId + '\' with now loaded language ' + language);
// re-execute this function
me.translate.apply(this, orgArguments);
});
// and fall back to English for now until the real language
// file is loaded
}
// for all other langauges than English for which this behaviour
// is expected as it is built-in, log error
if (language !== null && language !== 'en') {
console.error('Missing translation for: \'' + messageId + '\' in language ' + language);
// fallback to English
}
// save English translation (should be the same on both sides)
translations[messageId] = args[0];
}
// lookup plural translation
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 {
// lookup singular translation
args[0] = translations[messageId];
}
// format string
var output = Helper.sprintf.apply(this, args);
// if $element is given, apply text to element
if ($element !== null) {
// get last text node of element
var content = $element.contents();
if (content.length > 1) {
content[content.length - 1].nodeValue = ' ' + output;
} else {
$element.text(output);
}
}
return output;
}
/**
* 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 {int} n
* @return {int} 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, pt
default:
return (n !== 1 ? 1 : 0);
}
}
/**
* load translations into cache
*
* @name I18n.loadTranslations
* @function
*/
me.loadTranslations = function()
{
var newLanguage = 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 skip update
if (newLanguage === language) {
return;
}
// if language is built-in (English) skip update
if (newLanguage === 'en') {
language = 'en';
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);
language = 'en';
return;
}
// load strings from JSON
$.getJSON('i18n/' + newLanguage + '.json', function(data) {
language = newLanguage;
translations = data;
$(document).triggerHandler(languageLoadedEvent);
}).fail(function (data, textStatus, errorMsg) {
console.error('Language \'%s\' could not be loaded (%s: %s). Translation failed, fallback to English.', newLanguage, textStatus, errorMsg);
language = 'en';
});
}
/**
* resets state, used for unit testing
*
* @name I18n.reset
* @function
*/
me.reset = function(mockLanguage, mockTranslations)
{
language = mockLanguage || null;
translations = mockTranslations || {};
}
return me;
})();
/**
* handles everything related to en/decryption
*
* @name CryptTool
* @class
*/
var CryptTool = (function () {
var me = {};
/**
* compress a message (deflate compression), returns base64 encoded data
*
* @name CryptTool.compress
* @function
* @private
* @param {string} message
* @return {string} base64 data
*/
function compress(message)
{
return Base64.toBase64( RawDeflate.deflate( Base64.utob(message) ) );
}
/**
* decompress a message compressed with cryptToolcompress()
*
* @name CryptTool.decompress
* @function
* @private
* @param {string} data - base64 data
* @return {string} message
*/
function decompress(data)
{
return Base64.btou( RawDeflate.inflate( Base64.fromBase64(data) ) );
}
/**
* compress, then encrypt message with given key and password
*
* @name CryptTool.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, compress(message), options);
}
return sjcl.encrypt(key + sjcl.codec.hex.fromBits(sjcl.hash.sha256.hash(password)), compress(message), options);
}
/**
* decrypt message with key, then decompress
*
* @name CryptTool.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 decompress(sjcl.decrypt(key, data));
} catch(err) {
try {
return decompress(sjcl.decrypt(key + sjcl.codec.hex.fromBits(sjcl.hash.sha256.hash(password)), data));
} catch(e) {
// ignore error, because ????? @TODO
}
}
}
return '';
}
/**
* checks whether the crypt tool has collected enough entropy
*
* @name CryptTool.isEntropyReady
* @function
* @return {bool}
*/
me.isEntropyReady = function()
{
return sjcl.random.isReady();
}
/**
* add a listener function, triggered when enough entropy is available
*
* @name CryptTool.addEntropySeedListener
* @function
* @param {function} func
*/
me.addEntropySeedListener = function(func)
{
sjcl.random.addEventListener('seeded', func);
}
/**
* returns a random symmetric key
*
* @name CryptTool.getSymmetricKey
* @function
* @return {string} func
*/
me.getSymmetricKey = function()
{
return sjcl.codec.base64.fromBits(sjcl.random.randomWords(8, 0), 0);
}
return me;
})();
/**
* (Model) Data source (aka MVC)
*
* @name Model
* @class
*/
var Model = (function () {
var me = {};
var $cipherData,
$templates;
var id = null, symmetricKey = null;
/**
* returns the expiration set in the HTML
*
* @name Model.getExpirationDefault
* @function
* @return string
* @TODO the template can be simplified as #pasteExpiration is no longer modified (only default value)
*/
me.getExpirationDefault = function()
{
return $('#pasteExpiration').val();
}
/**
* returns the format set in the HTML
*
* @name Model.getFormatDefault
* @function
* @return string
* @TODO the template can be simplified as #pasteFormatter is no longer modified (only default value)
*/
me.getFormatDefault = function()
{
return $('#pasteFormatter').val();
}
/**
* check if cipher data was supplied
*
* @name Model.getCipherData
* @function
* @return boolean
*/
me.hasCipherData = function()
{
return (me.getCipherData().length > 0);
}
/**
* returns the cipher data
*
* @name Model.getCipherData
* @function
* @return string
*/
me.getCipherData = function()
{
return $cipherData.text();
}
/**
* get the pastes unique identifier from the URL,
* eg. http://example.com/path/?c05354954c49a487#dfdsdgdgdfgdf returns c05354954c49a487
*
* @name Model.getPasteId
* @function
* @return {string} unique identifier
* @throws {string}
*/
me.getPasteId = function()
{
if (id === null) {
id = window.location.search.substring(1);
if (id === '') {
throw 'no paste id given';
}
}
return id;
}
/**
* return the deciphering key stored in anchor part of the URL
*
* @name Model.getPasteKey
* @function
* @return {string|null} key
* @throws {string}
*/
me.getPasteKey = function()
{
if (symmetricKey === null) {
symmetricKey = window.location.hash.substring(1);
if (symmetricKey === '') {
throw 'no encryption key given';
}
// Some web 2.0 services and redirectors add data AFTER the anchor
// (such as &utm_source=...). We will strip any additional data.
var ampersandPos = symmetricKey.indexOf('&');
if (ampersandPos > -1)
{
symmetricKey = symmetricKey.substring(0, ampersandPos);
}
}
return symmetricKey;
}
/**
* returns a jQuery copy of the HTML template
*
* @name Model.getTemplate
* @function
* @param {string} name - the name of the template
* @return {jQuery}
*/
me.getTemplate = function(name)
{
// find template
var $element = $templates.find('#' + name + 'template').clone(true);
// change ID to avoid collisions (one ID should really be unique)
return $element.prop('id', name);
}
/**
* resets state, used for unit testing
*
* @name Model.reset
* @function
*/
me.reset = function()
{
$cipherData = $templates = id = symmetricKey = null;
}
/**
* init navigation manager
*
* preloads jQuery elements
*
* @name Model.init
* @function
*/
me.init = function()
{
$cipherData = $('#cipherdata');
$templates = $('#templates');
}
return me;
})();
/**
* Helper functions for user interface
*
* everything directly UI-related, which fits nowhere else
*
* @name UiHelper
* @class
*/
var UiHelper = (function () {
var me = {};
/**
* handle history (pop) state changes
*
* currently this does only handle redirects to the home page.
*
* @name UiHelper.historyChange
* @private
* @function
* @param {Event} event
*/
function historyChange(event)
{
var currentLocation = Helper.baseUri();
if (event.originalEvent.state === null && // no state object passed
event.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;
}
}
/**
* reload the page
*
* This takes the user to the PrivateBin homepage.
*
* @name UiHelper.reloadHome
* @function
*/
me.reloadHome = function()
{
window.location.href = Helper.baseUri();
}
/**
* checks whether the element is currently visible in the viewport (so
* the user can actually see it)
*
* @see {@link https://stackoverflow.com/a/40658647}
* @name UiHelper.isVisible
* @function
* @param {jQuery} $element The link hash to move to.
*/
me.isVisible = function($element)
{
var elementTop = $element.offset().top;
var viewportTop = $(window).scrollTop();
var viewportBottom = viewportTop + $(window).height();
return (elementTop > viewportTop && elementTop < viewportBottom);
}
/**
* scrolls to a specific element
*
* @see {@link https://stackoverflow.com/questions/4198041/jquery-smooth-scroll-to-an-anchor#answer-12714767}
* @name UiHelper.scrollTo
* @function
* @param {jQuery} $element The link hash to move to.
* @param {(number|string)} animationDuration passed to jQuery .animate, when set to 0 the animation is skipped
* @param {string} animationEffect passed to jQuery .animate
* @param {function} finishedCallback function to call after animation finished
*/
me.scrollTo = function($element, animationDuration, animationEffect, finishedCallback)
{
var $body = $('html, body'),
margin = 50,
callbackCalled = false;
//calculate destination place
var dest = 0;
// if it would scroll out of the screen at the bottom only scroll it as
// far as the screen can go
if ($element.offset().top > $(document).height() - $(window).height()) {
dest = $(document).height() - $(window).height();
} else {
dest = $element.offset().top - margin;
}
// skip animation if duration is set to 0
if (animationDuration === 0) {
window.scrollTo(0, dest);
} else {
// stop previous animation
$body.stop();
// scroll to destination
$body.animate({
scrollTop: dest
}, animationDuration, animationEffect);
}
// as we have finished we can enable scrolling again
$body.queue(function (next) {
if (!callbackCalled) {
// call user function if needed
if (typeof finishedCallback !== 'undefined') {
finishedCallback();
}
// prevent calling this function twice
callbackCalled = true;
}
next();
});
}
/**
* trigger a history (pop) state change
*
* used to test the UiHelper.historyChange private function
*
* @name UiHelper.mockHistoryChange
* @function
* @param {string} state (optional) state to mock
*/
me.mockHistoryChange = function(state)
{
if (typeof state === 'undefined') {
state = null;
}
historyChange($.Event('popstate', {originalEvent: new PopStateEvent('popstate', {state: state}), target: window}));
}
/**
* initialize
*
* @name UiHelper.init
* @function
*/
me.init = function()
{
// update link to home page
$('.reloadlink').prop('href', Helper.baseUri());
$(window).on('popstate', historyChange);
}
return me;
})();
/**
* Alert/error manager
*
* @name Alert
* @class
*/
var Alert = (function () {
var me = {};
var $errorMessage,
$loadingIndicator,
$statusMessage,
$remainingTime;
var currentIcon;
var alertType = [
'loading', // not in bootstrap, but using a good value here
'info', // status icon
'warning', // not used yet
'danger' // error icon
];
var customHandler;
/**
* forwards a request to the i18n module and shows the element
*
* @name Alert.handleNotification
* @private
* @function
* @param {int} id - id of notification
* @param {jQuery} $element - jQuery object
* @param {string|array} args
* @param {string|null} icon - optional, icon
*/
function handleNotification(id, $element, args, icon)
{
// basic parsing/conversion of parameters
if (typeof icon === 'undefined') {
icon = null;
}
if (typeof args === 'undefined') {
args = null;
} else if (typeof args === 'string') {
// convert string to array if needed
args = [args];
}
// pass to custom handler if defined
if (typeof customHandler === 'function') {
var handlerResult = customHandler(alertType[id], $element, args, icon);
if (handlerResult === true) {
// if it returns true, skip own handler
return;
}
if (handlerResult instanceof jQuery) {
// continue processing with new element
$element = handlerResult;
icon = null; // icons not supported in this case
}
}
// handle icon
if (icon !== null && // icon was passed
icon !== currentIcon[id] // and it differs from current icon
) {
var $glyphIcon = $element.find(':first');
// remove (previous) icon
$glyphIcon.removeClass(currentIcon[id]);
// any other thing as a string (e.g. 'null') (only) removes the icon
if (typeof icon === 'string') {
// set new icon
currentIcon[id] = 'glyphicon-' + icon;
$glyphIcon.addClass(currentIcon[id]);
}
}
// show text
if (args !== null) {
// add jQuery object to it as first parameter
args.unshift($element);
// pass it to I18n
I18n._.apply(this, args);
}
// show notification
$element.removeClass('hidden');
}
/**
* display a status message
*
* This automatically passes the text to I18n for translation.
*
* @name Alert.showStatus
* @function
* @param {string|array} message string, use an array for %s/%d options
* @param {string|null} icon optional, the icon to show,
* default: leave previous icon
* @param {bool} dismissable optional, whether the notification
* can be dismissed (closed), default: false
* @param {bool|int} autoclose optional, after how many seconds the
* notification should be hidden automatically;
* default: disabled (0); use true for default value
*/
me.showStatus = function(message, icon, dismissable, autoclose)
{
console.info('status shown: ', message);
// @TODO: implement dismissable
// @TODO: implement autoclose
handleNotification(1, $statusMessage, message, icon);
}
/**
* display an error message
*
* This automatically passes the text to I18n for translation.
*
* @name Alert.showError
* @function
* @param {string|array} message string, use an array for %s/%d options
* @param {string|null} icon optional, the icon to show, default:
* leave previous icon
* @param {bool} dismissable optional, whether the notification
* can be dismissed (closed), default: false
* @param {bool|int} autoclose optional, after how many seconds the
* notification should be hidden automatically;
* default: disabled (0); use true for default value
*/
me.showError = function(message, icon, dismissable, autoclose)
{
console.error('error message shown: ', message);
// @TODO: implement dismissable (bootstrap add-on has it)
// @TODO: implement autoclose
handleNotification(3, $errorMessage, message, icon);
}
/**
* display remaining message
*
* This automatically passes the text to I18n for translation.
*
* @name Alert.showRemaining
* @function
* @param {string|array} message string, use an array for %s/%d options
*/
me.showRemaining = function(message)
{
console.info('remaining message shown: ', message);
handleNotification(1, $remainingTime, message);
}
/**
* shows a loading message, optionally with a percentage
*
* This automatically passes all texts to the i10s module.
*
* @name Alert.showLoading
* @function
* @param {string|array|null} message optional, use an array for %s/%d options, default: 'Loading…'
* @param {int} percentage optional, default: null
* @param {string|null} icon optional, the icon to show, default: leave previous icon
*/
me.showLoading = function(message, percentage, icon)
{
if (typeof message !== 'undefined' && message !== null) {
console.info('status changed: ', message);
}
// default message text
if (typeof message === 'undefined') {
message = 'Loading…';
}
// currently percentage parameter is ignored
// // @TODO handle it here…
handleNotification(0, $loadingIndicator, message, icon);
// show loading status (cursor)
$('body').addClass('loading');
}
/**
* hides the loading message
*
* @name Alert.hideLoading
* @function
*/
me.hideLoading = function()
{
$loadingIndicator.addClass('hidden');
// hide loading cursor
$('body').removeClass('loading');
}
/**
* hides any status/error messages
*
* This does not include the loading message.
*
* @name Alert.hideMessages
* @function
*/
me.hideMessages = function()
{
// also possible: $('.statusmessage').addClass('hidden');
$statusMessage.addClass('hidden');
$errorMessage.addClass('hidden');
}
/**
* set a custom handler, which gets all notifications.
*
* This handler gets the following arguments:
* alertType (see array), $element, args, icon
* If it returns true, the own processing will be stopped so the message
* will not be displayed. Otherwise it will continue.
* As an aditional feature it can return q jQuery element, which will
* then be used to add the message there. Icons are not supported in
* that case and will be ignored.
* Pass 'null' to reset/delete the custom handler.
* Note that there is no notification when a message is supposed to get
* hidden.
*
* @name Alert.setCustomHandler
* @function
* @param {function|null} newHandler
*/
me.setCustomHandler = function(newHandler)
{
customHandler = newHandler;
}
/**
* init status manager
*
* preloads jQuery elements
*
* @name Alert.init
* @function
*/
me.init = function()
{
// hide "no javascript" error message
$('#noscript').hide();
// not a reset, but first set of the elements
$errorMessage = $('#errormessage');
$loadingIndicator = $('#loadingindicator');
$statusMessage = $('#status');
$remainingTime = $('#remainingtime');
currentIcon = [
'glyphicon-time', // loading icon
'glyphicon-info-sign', // status icon
'', // reserved for warning, not used yet
'glyphicon-alert' // error icon
];
}
return me;
})();
/**
* handles paste status/result
*
* @name PasteStatus
* @class
*/
var PasteStatus = (function () {
var me = {};
var $pasteSuccess,
$pasteUrl,
$remainingTime,
$shortenButton;
/**
* forward to URL shortener
*
* @name PasteStatus.sendToShortener
* @private
* @function
* @param {Event} event
*/
function sendToShortener(event)
{
window.location.href = $shortenButton.data('shortener')
+ encodeURIComponent($pasteUrl.attr('href'));
}
/**
* 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 PasteStatus.pasteLinkClick
* @function
* @param {Event} event
*/
function pasteLinkClick(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);
}
}
/**
* creates a notification after a successfull paste upload
*
* @name PasteStatus.createPasteNotification
* @function
* @param {string} url
* @param {string} deleteUrl
*/
me.createPasteNotification = function(url, deleteUrl)
{
$('#pastelink').html(
I18n._(
'Your paste is <a id="pasteurl" href="%s">%s</a> <span id="copyhint">(Hit [Ctrl]+[c] to copy)</span>',
url, url
)
);
// save newly created element
$pasteUrl = $('#pasteurl');
// and add click event
$pasteUrl.click(pasteLinkClick);
// shorten button
$('#deletelink').html('<a href="' + deleteUrl + '">' + I18n._('Delete data') + '</a>');
// show result
$pasteSuccess.removeClass('hidden');
// we pre-select the link so that the user only has to [Ctrl]+[c] the link
Helper.selectText($pasteUrl[0]);
}
/**
* shows the remaining time
*
* @name PasteStatus.showRemainingTime
* @function
* @param {object} pasteMetaData
*/
me.showRemainingTime = function(pasteMetaData)
{
if (pasteMetaData.burnafterreading) {
// display paste "for your eyes only" if it is deleted
// actually remove paste, before we claim it is deleted
Controller.removePaste(Model.getPasteId(), 'burnafterreading');
Alert.showRemaining("FOR YOUR EYES ONLY. Don't close this window, this message can't be displayed again.");
$remainingTime.addClass('foryoureyesonly');
// discourage cloning (it cannot really be prevented)
TopNav.hideCloneButton();
} else if (pasteMetaData.expire_date) {
// display paste expiration
var expiration = Helper.secondsToHuman(pasteMetaData.remaining_time),
expirationLabel = [
'This document will expire in %d ' + expiration[1] + '.',
'This document will expire in %d ' + expiration[1] + 's.'
];
Alert.showRemaining([expirationLabel, expiration[0]]);
$remainingTime.removeClass('foryoureyesonly');
} else {
// never expires
return;
}
// in the end, display notification
$remainingTime.removeClass('hidden');
}
/**
* hides the remaining time and successful upload notification
*
* @name PasteStatus.hideRemainingTime
* @function
*/
me.hideMessages = function()
{
$remainingTime.addClass('hidden');
$pasteSuccess.addClass('hidden');
}
/**
* init status manager
*
* preloads jQuery elements
*
* @name PasteStatus.init
* @function
*/
me.init = function()
{
$pasteSuccess = $('#pastesuccess');
// $pasteUrl is saved in me.createPasteNotification() after creation
$remainingTime = $('#remainingtime');
$shortenButton = $('#shortenbutton');
// bind elements
$shortenButton.click(sendToShortener);
}
return me;
})();
/**
* password prompt
*
* @name Prompt
* @class
*/
var Prompt = (function () {
var me = {};
var $passwordDecrypt,
$passwordForm,
$passwordModal;
var password = '';
/**
* submit a password in the modal dialog
*
* @name Prompt.submitPasswordModal
* @private
* @function
* @param {Event} event
*/
function submitPasswordModal(event)
{
event.preventDefault();
// get input
password = $passwordDecrypt.val();
// hide modal
$passwordModal.modal('hide');
PasteDecrypter.run();
}
/**
* ask the user for the password and set it
*
* @name Prompt.requestPassword
* @function
*/
me.requestPassword = function()
{
// show new bootstrap method (if available)
if ($passwordModal.length !== 0) {
$passwordModal.modal({
backdrop: 'static',
keyboard: false
});
return;
}
// fallback to old method for page template
var newPassword = prompt(I18n._('Please enter the password for this paste:'), '');
if (newPassword === null) {
throw 'password prompt canceled';
}
if (password.length === 0) {
// recurse…
return me.requestPassword();
}
password = newPassword;
}
/**
* get the cached password
*
* If you do not get a password with this function
* (returns an empty string), use requestPassword.
*
* @name Prompt.getPassword
* @function
* @return {string}
*/
me.getPassword = function()
{
return password;
}
/**
* init status manager
*
* preloads jQuery elements
*
* @name Prompt.init
* @function
*/
me.init = function()
{
$passwordDecrypt = $('#passworddecrypt');
$passwordForm = $('#passwordform');
$passwordModal = $('#passwordmodal');
// bind events
// focus password input when it is shown
$passwordModal.on('shown.bs.Model', function () {
$passwordDecrypt.focus();
});
// handle Model password submission
$passwordForm.submit(submitPasswordModal);
}
return me;
})();
/**
* Manage paste/message input, and preview tab
*
* Note that the actual preview is handled by PasteViewer.
*
* @name Editor
* @class
*/
var Editor = (function () {
var me = {};
var $editorTabs,
$messageEdit,
$messagePreview,
$message;
var isPreview = false;
/**
* support input of tab character
*
* @name Editor.supportTabs
* @function
* @param {Event} event
* @this $message (but not used, so it is jQuery-free, possibly faster)
*/
function supportTabs(event)
{
var keyCode = event.keyCode || event.which;
// tab was pressed
if (keyCode === 9) {
// 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;
// prevent the textarea to lose focus
event.preventDefault();
}
}
/**
* view the Editor tab
*
* @name Editor.viewEditor
* @function
* @param {Event} event - optional
*/
function viewEditor(event)
{
// toggle buttons
$messageEdit.addClass('active');
$messagePreview.removeClass('active');
PasteViewer.hide();
// reshow input
$message.removeClass('hidden');
me.focusInput();
// finish
isPreview = false;
// prevent jumping of page to top
if (typeof event !== 'undefined') {
event.preventDefault();
}
}
/**
* view the preview tab
*
* @name Editor.viewPreview
* @function
* @param {Event} event
*/
function viewPreview(event)
{
// toggle buttons
$messageEdit.removeClass('active');
$messagePreview.addClass('active');
// hide input as now preview is shown
$message.addClass('hidden');
// show preview
PasteViewer.setText($message.val());
PasteViewer.run();
// finish
isPreview = true;
// prevent jumping of page to top
if (typeof event !== 'undefined') {
event.preventDefault();
}
}
/**
* get the state of the preview
*
* @name Editor.isPreview
* @function
*/
me.isPreview = function()
{
return isPreview;
}
/**
* reset the Editor view
*
* @name Editor.resetInput
* @function
*/
me.resetInput = function()
{
// go back to input
if (isPreview) {
viewEditor();
}
// clear content
$message.val('');
}
/**
* shows the Editor
*
* @name Editor.show
* @function
*/
me.show = function()
{
$message.removeClass('hidden');
$editorTabs.removeClass('hidden');
}
/**
* hides the Editor
*
* @name Editor.reset
* @function
*/
me.hide = function()
{
$message.addClass('hidden');
$editorTabs.addClass('hidden');
}
/**
* focuses the message input
*
* @name Editor.focusInput
* @function
*/
me.focusInput = function()
{
$message.focus();
}
/**
* sets a new text
*
* @name Editor.setText
* @function
* @param {string} newText
*/
me.setText = function(newText)
{
$message.val(newText);
}
/**
* returns the current text
*
* @name Editor.getText
* @function
* @return {string}
*/
me.getText = function()
{
return $message.val()
}
/**
* init status manager
*
* preloads jQuery elements
*
* @name Editor.init
* @function
*/
me.init = function()
{
$editorTabs = $('#editorTabs');
$message = $('#message');
// bind events
$message.keydown(supportTabs);
// bind click events to tab switchers (a), but save parent of them
// (li)
$messageEdit = $('#messageedit').click(viewEditor).parent();
$messagePreview = $('#messagepreview').click(viewPreview).parent();
}
return me;
})();
/**
* (view) Parse and show paste.
*
* @name PasteViewer
* @class
*/
var PasteViewer = (function () {
var me = {};
var $placeholder,
$prettyMessage,
$prettyPrint,
$plainText;
var text,
format = 'plaintext',
isDisplayed = false,
isChanged = true; // by default true as nothing was parsed yet
/**
* apply the set format on paste and displays it
*
* @name PasteViewer.parsePaste
* @private
* @function
*/
function parsePaste()
{
// skip parsing if no text is given
if (text === '') {
return;
}
// escape HTML entities, link URLs, sanitize
var escapedLinkedText = Helper.urls2links(
$('<div />').text(text).html()
),
sanitizedLinkedText = DOMPurify.sanitize(escapedLinkedText);
$plainText.html(sanitizedLinkedText);
$prettyPrint.html(sanitizedLinkedText);
switch (format) {
case 'markdown':
var converter = new showdown.Converter({
strikethrough: true,
tables: true,
tablesHeaderId: true
});
// let showdown convert the HTML and sanitize HTML *afterwards*!
$plainText.html(
DOMPurify.sanitize(converter.makeHtml(text))
);
// add table classes from bootstrap css
$plainText.find('table').addClass('table-condensed table-bordered');
break;
case 'syntaxhighlighting':
// yes, this is really needed to initialize the environment
if (typeof prettyPrint === 'function')
{
prettyPrint();
}
$prettyPrint.html(
DOMPurify.sanitize(
prettyPrintOne(escapedLinkedText, null, true)
)
);
// fall through, as the rest is the same
default: // = 'plaintext'
$prettyPrint.css('white-space', 'pre-wrap');
$prettyPrint.css('word-break', 'normal');
$prettyPrint.removeClass('prettyprint');
}
}
/**
* displays the paste
*
* @name PasteViewer.showPaste
* @private
* @function
*/
function showPaste()
{
// instead of "nothing" better display a placeholder
if (text === '') {
$placeholder.removeClass('hidden')
return;
}
// otherwise hide the placeholder
$placeholder.addClass('hidden')
switch (format) {
case 'markdown':
$plainText.removeClass('hidden');
$prettyMessage.addClass('hidden');
break;
default:
$plainText.addClass('hidden');
$prettyMessage.removeClass('hidden');
break;
}
}
/**
* sets the format in which the text is shown
*
* @name PasteViewer.setFormat
* @function
* @param {string} newFormat the new format
*/
me.setFormat = function(newFormat)
{
// skip if there is no update
if (format === newFormat) {
return;
}
// needs to update display too, if we switch from or to Markdown
if (format === 'markdown' || newFormat === 'markdown') {
isDisplayed = false;
}
format = newFormat;
isChanged = true;
}
/**
* returns the current format
*
* @name PasteViewer.getFormat
* @function
* @return {string}
*/
me.getFormat = function()
{
return format;
}
/**
* returns whether the current view is pretty printed
*
* @name PasteViewer.isPrettyPrinted
* @function
* @return {bool}
*/
me.isPrettyPrinted = function()
{
return $prettyPrint.hasClass('prettyprinted');
}
/**
* sets the text to show
*
* @name PasteViewer.setText
* @function
* @param {string} newText the text to show
*/
me.setText = function(newText)
{
if (text !== newText) {
text = newText;
isChanged = true;
}
}
/**
* gets the current cached text
*
* @name PasteViewer.getText
* @function
* @return {string}
*/
me.getText = function()
{
return text;
}
/**
* show/update the parsed text (preview)
*
* @name PasteViewer.run
* @function
*/
me.run = function()
{
if (isChanged) {
parsePaste();
isChanged = false;
}
if (!isDisplayed) {
showPaste();
isDisplayed = true;
}
}
/**
* hide parsed text (preview)
*
* @name PasteViewer.hide
* @function
*/
me.hide = function()
{
if (!isDisplayed) {
console.warn('PasteViewer was called to hide the parsed view, but it is already hidden.');
}
$plainText.addClass('hidden');
$prettyMessage.addClass('hidden');
$placeholder.addClass('hidden');
isDisplayed = false;
}
/**
* init status manager
*
* preloads jQuery elements
*
* @name PasteViewer.init
* @function
*/
me.init = function()
{
$placeholder = $('#placeholder');
$plainText = $('#plaintext');
$prettyMessage = $('#prettymessage');
$prettyPrint = $('#prettyprint');
// check requirements
if (typeof prettyPrintOne !== 'function') {
Alert.showError([
'The library %s is not available. This may cause display errors.',
'pretty print'
]);
}
if (typeof showdown !== 'object') {
Alert.showError([
'The library %s is not available. This may cause display errors.',
'showdown'
]);
}
// get default option from template/HTML or fall back to set value
format = Model.getFormatDefault() || format;
text = '';
isDisplayed = false;
isChanged = true;
}
return me;
})();
/**
* (view) Show attachment and preview if possible
*
* @name AttachmentViewer
* @class
*/
var AttachmentViewer = (function () {
var me = {};
var $attachmentLink,
$attachmentPreview,
$attachment;
var attachmentHasPreview = false;
/**
* sets the attachment but does not yet show it
*
* @name AttachmentViewer.setAttachment
* @function
* @param {string} attachmentData - base64-encoded data of file
* @param {string} fileName - optional, file name
*/
me.setAttachment = function(attachmentData, fileName)
{
var imagePrefix = 'data:image/';
$attachmentLink.attr('href', attachmentData);
if (typeof fileName !== 'undefined') {
$attachmentLink.attr('download', fileName);
}
// if the attachment is an image, display it
if (attachmentData.substring(0, imagePrefix.length) === imagePrefix) {
$attachmentPreview.html(
$(document.createElement('img'))
.attr('src', attachmentData)
.attr('class', 'img-thumbnail')
);
attachmentHasPreview = true;
}
}
/**
* displays the attachment
*
* @name AttachmentViewer.showAttachment
* @function
*/
me.showAttachment = function()
{
$attachment.removeClass('hidden');
if (attachmentHasPreview) {
$attachmentPreview.removeClass('hidden');
}
}
/**
* removes the attachment
*
* This automatically hides the attachment containers to, to
* prevent an inconsistent display.
*
* @name AttachmentViewer.removeAttachment
* @function
*/
me.removeAttachment = function()
{
me.hideAttachment();
me.hideAttachmentPreview();
$attachmentLink.prop('href', '');
$attachmentLink.prop('download', '');
$attachmentPreview.html('');
}
/**
* hides the attachment
*
* This will not hide the preview (see AttachmentViewer.hideAttachmentPreview
* for that) nor will it hide the attachment link if it was moved somewhere
* else (see AttachmentViewer.moveAttachmentTo).
*
* @name AttachmentViewer.hideAttachment
* @function
*/
me.hideAttachment = function()
{
$attachment.addClass('hidden');
}
/**
* hides the attachment preview
*
* @name AttachmentViewer.hideAttachmentPreview
* @function
*/
me.hideAttachmentPreview = function()
{
$attachmentPreview.addClass('hidden');
}
/**
* checks if there is an attachment
*
* @name AttachmentViewer.hasAttachment
* @function
*/
me.hasAttachment = function()
{
var link = $attachmentLink.prop('href');
return (typeof link !== 'undefined' && link !== '')
}
/**
* return the attachment
*
* @name AttachmentViewer.getAttachment
* @function
* @returns {array}
*/
me.getAttachment = function()
{
return [
$attachmentLink.prop('href'),
$attachmentLink.prop('download')
];
}
/**
* moves the attachment link to another element
*
* It is advisable to hide the attachment afterwards (AttachmentViewer.hideAttachment)
*
* @name AttachmentViewer.moveAttachmentTo
* @function
* @param {jQuery} $element - the wrapper/container element where this should be moved to
* @param {string} label - the text to show (%s will be replaced with the file name), will automatically be translated
*/
me.moveAttachmentTo = function($element, label)
{
// move elemement to new place
$attachmentLink.appendTo($element);
// update text
I18n._($attachmentLink, label, $attachmentLink.attr('download'));
}
/**
* initiate
*
* preloads jQuery elements
*
* @name AttachmentViewer.init
* @function
*/
me.init = function()
{
$attachment = $('#attachment');
$attachmentLink = $('#attachment a');
$attachmentPreview = $('#attachmentPreview');
attachmentHasPreview = false;
}
return me;
})();
/**
* (view) Shows discussion thread and handles replies
*
* @name DiscussionViewer
* @class
*/
var DiscussionViewer = (function () {
var me = {};
var $commentTail,
$discussion,
$reply,
$replyMessage,
$replyNickname,
$replyStatus,
$commentContainer;
var replyCommentId;
/**
* initializes the templates
*
* @name DiscussionViewer.initTemplates
* @private
* @function
*/
function initTemplates()
{
$reply = Model.getTemplate('reply');
$replyMessage = $reply.find('#replymessage');
$replyNickname = $reply.find('#nickname');
$replyStatus = $reply.find('#replystatus');
// cache jQuery elements
$commentTail = Model.getTemplate('commenttail');
}
/**
* open the comment entry when clicking the "Reply" button of a comment
*
* @name DiscussionViewer.openReply
* @private
* @function
* @param {Event} event
*/
function openReply(event)
{
var $source = $(event.target);
// clear input
$replyMessage.val('');
$replyNickname.val('');
// get comment id from source element
replyCommentId = $source.parent().prop('id').split('_')[1];
// move to correct position
$source.after($reply);
// show
$reply.removeClass('hidden');
$replyMessage.focus();
event.preventDefault();
}
/**
* custom handler for displaying notifications in own status message area
*
* @name DiscussionViewer.handleNotification
* @function
* @param {string} alertType
* @param {jQuery} $element
* @param {string|array} args
* @param {string|null} icon
* @return {bool|jQuery}
*/
me.handleNotification = function(alertType, $element, args, icon)
{
// ignore loading messages
if (alertType === 'loading') {
return false;
}
if (alertType === 'danger') {
$replyStatus.removeClass('alert-info');
$replyStatus.addClass('alert-danger');
$replyStatus.find(':first').removeClass('glyphicon-alert');
$replyStatus.find(':first').addClass('glyphicon-info-sign');
} else {
$replyStatus.removeClass('alert-danger');
$replyStatus.addClass('alert-info');
$replyStatus.find(':first').removeClass('glyphicon-info-sign');
$replyStatus.find(':first').addClass('glyphicon-alert');
}
return $replyStatus;
}
/**
* adds another comment
*
* @name DiscussionViewer.addComment
* @function
* @param {object} comment
* @param {string} commentText
* @param {string} nickname
*/
me.addComment = function(comment, commentText, nickname)
{
if (commentText === '') {
commentText = 'comment decryption failed';
}
// create new comment based on template
var $commentEntry = Model.getTemplate('comment');
$commentEntry.prop('id', 'comment_' + comment.id);
var $commentEntryData = $commentEntry.find('div.commentdata');
// set & parse text
$commentEntryData.html(
DOMPurify.sanitize(
Helper.urls2links(commentText)
)
);
// set nickname
if (nickname.length > 0) {
$commentEntry.find('span.nickname').text(nickname);
} else {
$commentEntry.find('span.nickname').html('<i></i>');
I18n._($commentEntry.find('span.nickname i'), 'Anonymous');
}
// set date
$commentEntry.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) {
$commentEntry.find('span.nickname')
.before(
'<img src="' + comment.meta.vizhash + '" class="vizhash" /> '
);
$(document).on('languageLoaded', function () {
$commentEntry.find('img.vizhash')
.prop('title', I18n._('Avatar generated from IP address'));
});
}
// starting point (default value/fallback)
var $place = $commentContainer;
// if parent comment exists
var $parentComment = $('#comment_' + comment.parentid);
if ($parentComment.length) {
// use parent as position for new comment, so it is shifted
// to the right
$place = $parentComment;
}
// finally append comment
$place.append($commentEntry);
}
/**
* finishes the discussion area after last comment
*
* @name DiscussionViewer.finishDiscussion
* @function
*/
me.finishDiscussion = function()
{
// add 'add new comment' area
$commentContainer.append($commentTail);
// show discussions
$discussion.removeClass('hidden');
}
/**
* removes the old discussion and prepares everything for creating a new
* one.
*
* @name DiscussionViewer.prepareNewDiscussion
* @function
*/
me.prepareNewDiscussion = function()
{
$commentContainer.html('');
$discussion.addClass('hidden');
// (re-)init templates
initTemplates();
}
/**
* returns the users message from the reply form
*
* @name DiscussionViewer.getReplyMessage
* @function
* @return {String}
*/
me.getReplyMessage = function()
{
return $replyMessage.val();
}
/**
* returns the users nickname (if any) from the reply form
*
* @name DiscussionViewer.getReplyNickname
* @function
* @return {String}
*/
me.getReplyNickname = function()
{
return $replyNickname.val();
}
/**
* returns the id of the parent comment the user is replying to
*
* @name DiscussionViewer.getReplyCommentId
* @function
* @return {int|undefined}
*/
me.getReplyCommentId = function()
{
return replyCommentId;
}
/**
* highlights a specific comment and scrolls to it if necessary
*
* @name DiscussionViewer.highlightComment
* @function
* @param {string} commentId
* @param {bool} fadeOut - whether to fade out the comment
*/
me.highlightComment = function(commentId, fadeOut)
{
var $comment = $('#comment_' + commentId);
// in case comment does not exist, cancel
if ($comment.length === 0) {
return;
}
var highlightComment = function () {
$comment.addClass('highlight');
if (fadeOut === true) {
setTimeout(function () {
$comment.removeClass('highlight');
}, 300);
}
}
if (UiHelper.isVisible($comment)) {
return highlightComment();
}
UiHelper.scrollTo($comment, 100, 'swing', highlightComment);
}
/**
* initiate
*
* preloads jQuery elements
*
* @name DiscussionViewer.init
* @function
*/
me.init = function()
{
// bind events to templates (so they are later cloned)
$('#commenttailtemplate, #commenttemplate').find('button').on('click', openReply);
$('#replytemplate').find('button').on('click', PasteEncrypter.sendComment);
$commentContainer = $('#commentcontainer');
$discussion = $('#discussion');
}
return me;
})();
/**
* Manage top (navigation) bar
*
* @name TopNav
* @param {object} window
* @param {object} document
* @class
*/
var TopNav = (function (window, document) {
var me = {};
var createButtonsDisplayed = false;
var viewButtonsDisplayed = false;
var $attach,
$burnAfterReading,
$burnAfterReadingOption,
$cloneButton,
$customAttachment,
$expiration,
$fileRemoveButton,
$fileWrap,
$formatter,
$newButton,
$openDiscussion,
$openDiscussionOption,
$password,
$passwordInput,
$rawTextButton,
$qrCodeLink,
$sendButton;
var pasteExpiration = '1week';
/**
* set the expiration on bootstrap templates in dropdown
*
* @name TopNav.updateExpiration
* @private
* @function
* @param {Event} event
*/
function updateExpiration(event)
{
// get selected option
var target = $(event.target);
// update dropdown display and save new expiration time
$('#pasteExpirationDisplay').text(target.text());
pasteExpiration = target.data('expiration');
event.preventDefault();
}
/**
* set the format on bootstrap templates in dropdown
*
* @name TopNav.updateFormat
* @private
* @function
* @param {Event} event
*/
function updateFormat(event)
{
// get selected option
var $target = $(event.target);
// update dropdown display and save new format
var newFormat = $target.data('format');
$('#pasteFormatterDisplay').text($target.text());
PasteViewer.setFormat(newFormat);
// update preview
if (Editor.isPreview()) {
PasteViewer.run();
}
event.preventDefault();
}
/**
* when "burn after reading" is checked, disable discussion
*
* @name TopNav.changeBurnAfterReading
* @private
* @function
*/
function changeBurnAfterReading()
{
if ($burnAfterReading.is(':checked')) {
$openDiscussionOption.addClass('buttondisabled');
$openDiscussion.prop('checked', false);
// if button is actually disabled, force-enable it and uncheck other button
$burnAfterReadingOption.removeClass('buttondisabled');
} else {
$openDiscussionOption.removeClass('buttondisabled');
}
}
/**
* when discussion is checked, disable "burn after reading"
*
* @name TopNav.changeOpenDiscussion
* @private
* @function
*/
function changeOpenDiscussion()
{
if ($openDiscussion.is(':checked')) {
$burnAfterReadingOption.addClass('buttondisabled');
$burnAfterReading.prop('checked', false);
// if button is actually disabled, force-enable it and uncheck other button
$openDiscussionOption.removeClass('buttondisabled');
} else {
$burnAfterReadingOption.removeClass('buttondisabled');
}
}
/**
* return raw text
*
* @name TopNav.rawText
* @private
* @function
* @param {Event} event
*/
function rawText(event)
{
TopNav.hideAllButtons();
Alert.showLoading('Showing raw text…', 0, 'time');
var paste = PasteViewer.getText();
// push a new state to allow back navigation with browser back button
history.pushState(
{type: 'raw'},
document.title,
// recreate paste URL
Helper.baseUri() + '?' + Model.getPasteId() + '#' +
Model.getPasteKey()
);
// 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 $head = $('head').children().not('noscript, script, link[type="text/css"]');
var newDoc = document.open('text/html', 'replace');
newDoc.write('<!DOCTYPE html><html><head>');
for (var i = 0; i < $head.length; i++) {
newDoc.write($head[i].outerHTML);
}
newDoc.write('</head><body><pre>' + DOMPurify.sanitize(paste) + '</pre></body></html>');
newDoc.close();
}
/**
* saves the language in a cookie and reloads the page
*
* @name TopNav.setLanguage
* @private
* @function
* @param {Event} event
*/
function setLanguage(event)
{
document.cookie = 'lang=' + $(event.target).data('lang');
UiHelper.reloadHome();
}
/**
* hides all messages and creates a new paste
*
* @name TopNav.clickNewPaste
* @private
* @function
* @param {Event} event
*/
function clickNewPaste(event)
{
Controller.hideStatusMessages();
Controller.newPaste();
}
/**
* removes the existing attachment
*
* @name TopNav.removeAttachment
* @private
* @function
* @param {Event} event
*/
function removeAttachment(event)
{
// if custom attachment is used, remove it first
if (!$customAttachment.hasClass('hidden')) {
AttachmentViewer.removeAttachment();
$customAttachment.addClass('hidden');
$fileWrap.removeClass('hidden');
}
// our up-to-date jQuery can handle it :)
$fileWrap.find('input').val('');
// pevent '#' from appearing in the URL
event.preventDefault();
}
/**
* Shows the QR code of the current paste (URL).
*
* @name TopNav.displayQrCode
* @function
* @param {Event} event
*/
function displayQrCode(event)
{
var qrCanvas = kjua({
render: 'canvas',
text: window.location.href
});
$('#qrcode-display').html(qrCanvas);
}
/**
* Shows all elements belonging to viwing an existing pastes
*
* @name TopNav.showViewButtons
* @function
*/
me.showViewButtons = function()
{
if (viewButtonsDisplayed) {
console.warn('showViewButtons: view buttons are already displayed');
return;
}
$newButton.removeClass('hidden');
$cloneButton.removeClass('hidden');
$rawTextButton.removeClass('hidden');
$qrCodeLink.removeClass('hidden');
viewButtonsDisplayed = true;
}
/**
* Hides all elements belonging to existing pastes
*
* @name TopNav.hideViewButtons
* @function
*/
me.hideViewButtons = function()
{
if (!viewButtonsDisplayed) {
console.warn('hideViewButtons: view buttons are already hidden');
return;
}
$newButton.addClass('hidden');
$cloneButton.addClass('hidden');
$rawTextButton.addClass('hidden');
$qrCodeLink.addClass('hidden');
viewButtonsDisplayed = false;
}
/**
* Hides all elements belonging to existing pastes
*
* @name TopNav.hideAllButtons
* @function
*/
me.hideAllButtons = function()
{
me.hideViewButtons();
me.hideCreateButtons();
}
/**
* shows all elements needed when creating a new paste
*
* @name TopNav.showCreateButtons
* @function
*/
me.showCreateButtons = function()
{
if (createButtonsDisplayed) {
console.warn('showCreateButtons: create buttons are already displayed');
return;
}
$sendButton.removeClass('hidden');
$expiration.removeClass('hidden');
$formatter.removeClass('hidden');
$burnAfterReadingOption.removeClass('hidden');
$openDiscussionOption.removeClass('hidden');
$newButton.removeClass('hidden');
$password.removeClass('hidden');
$attach.removeClass('hidden');
createButtonsDisplayed = true;
}
/**
* shows all elements needed when creating a new paste
*
* @name TopNav.hideCreateButtons
* @function
*/
me.hideCreateButtons = function()
{
if (!createButtonsDisplayed) {
console.warn('hideCreateButtons: create buttons are already hidden');
return;
}
$newButton.addClass('hidden');
$sendButton.addClass('hidden');
$expiration.addClass('hidden');
$formatter.addClass('hidden');
$burnAfterReadingOption.addClass('hidden');
$openDiscussionOption.addClass('hidden');
$password.addClass('hidden');
$attach.addClass('hidden');
createButtonsDisplayed = false;
}
/**
* only shows the "new paste" button
*
* @name TopNav.showNewPasteButton
* @function
*/
me.showNewPasteButton = function()
{
$newButton.removeClass('hidden');
}
/**
* only hides the clone button
*
* @name TopNav.hideCloneButton
* @function
*/
me.hideCloneButton = function()
{
$cloneButton.addClass('hidden');
}
/**
* only hides the raw text button
*
* @name TopNav.hideRawButton
* @function
*/
me.hideRawButton = function()
{
$rawTextButton.addClass('hidden');
}
/**
* hides the file selector in attachment
*
* @name TopNav.hideFileSelector
* @function
*/
me.hideFileSelector = function()
{
$fileWrap.addClass('hidden');
}
/**
* shows the custom attachment
*
* @name TopNav.showCustomAttachment
* @function
*/
me.showCustomAttachment = function()
{
$customAttachment.removeClass('hidden');
}
/**
* collapses the navigation bar if nedded
*
* @name TopNav.collapseBar
* @function
*/
me.collapseBar = function()
{
var $bar = $('.navbar-toggle');
// check if bar is expanded
if ($bar.hasClass('collapse in')) {
// if so, toggle it
$bar.click();
}
}
/**
* returns the currently set expiration time
*
* @name TopNav.getExpiration
* @function
* @return {int}
*/
me.getExpiration = function()
{
return pasteExpiration;
}
/**
* returns the currently selected file(s)
*
* @name TopNav.getFileList
* @function
* @return {FileList|null}
*/
me.getFileList = function()
{
var $file = $('#file');
// if no file given, return null
if (!$file.length || !$file[0].files.length) {
return null;
}
// @TODO is this really necessary
if (!($file[0].files && $file[0].files[0])) {
return null;
}
return $file[0].files;
}
/**
* returns the state of the burn after reading checkbox
*
* @name TopNav.getExpiration
* @function
* @return {bool}
*/
me.getBurnAfterReading = function()
{
return $burnAfterReading.is(':checked');
}
/**
* returns the state of the discussion checkbox
*
* @name TopNav.getOpenDiscussion
* @function
* @return {bool}
*/
me.getOpenDiscussion = function()
{
return $openDiscussion.is(':checked');
}
/**
* returns the entered password
*
* @name TopNav.getPassword
* @function
* @return {string}
*/
me.getPassword = function()
{
return $passwordInput.val();
}
/**
* returns the element where custom attachments can be placed
*
* Used by AttachmentViewer when an attachment is cloned here.
*
* @name TopNav.getCustomAttachment
* @function
* @return {jQuery}
*/
me.getCustomAttachment = function()
{
return $customAttachment;
}
/**
* init navigation manager
*
* preloads jQuery elements
*
* @name TopNav.init
* @function
*/
me.init = function()
{
$attach = $('#attach');
$burnAfterReading = $('#burnafterreading');
$burnAfterReadingOption = $('#burnafterreadingoption');
$cloneButton = $('#clonebutton');
$customAttachment = $('#customattachment');
$expiration = $('#expiration');
$fileRemoveButton = $('#fileremovebutton');
$fileWrap = $('#filewrap');
$formatter = $('#formatter');
$newButton = $('#newbutton');
$openDiscussion = $('#opendiscussion');
$openDiscussionOption = $('#opendiscussionoption');
$password = $('#password');
$passwordInput = $('#passwordinput');
$rawTextButton = $('#rawtextbutton');
$sendButton = $('#sendbutton');
$qrCodeLink = $('#qrcodelink');
// bootstrap template drop down
$('#language ul.dropdown-menu li a').click(setLanguage);
// page template drop down
$('#language select option').click(setLanguage);
// bind events
$burnAfterReading.change(changeBurnAfterReading);
$openDiscussionOption.change(changeOpenDiscussion);
$newButton.click(clickNewPaste);
$sendButton.click(PasteEncrypter.sendPaste);
$cloneButton.click(Controller.clonePaste);
$rawTextButton.click(rawText);
$fileRemoveButton.click(removeAttachment);
$qrCodeLink.click(displayQrCode);
// bootstrap template drop downs
$('ul.dropdown-menu li a', $('#expiration').parent()).click(updateExpiration);
$('ul.dropdown-menu li a', $('#formatter').parent()).click(updateFormat);
// initiate default state of checkboxes
changeBurnAfterReading();
changeOpenDiscussion();
// get default value from template or fall back to set value
pasteExpiration = Model.getExpirationDefault() || pasteExpiration;
}
return me;
})(window, document);
/**
* Responsible for AJAX requests, transparently handles encryption…
*
* @name Uploader
* @class
*/
var Uploader = (function () {
var me = {};
var successFunc = null,
failureFunc = null,
url,
data,
symmetricKey,
password;
/**
* public variable ('constant') for errors to prevent magic numbers
*
* @name Uploader.error
* @readonly
* @enum {Object}
*/
me.error = {
okay: 0,
custom: 1,
unknown: 2,
serverError: 3
};
/**
* ajaxHeaders to send in AJAX requests
*
* @name Uploader.ajaxHeaders
* @private
* @readonly
* @enum {Object}
*/
var ajaxHeaders = {'X-Requested-With': 'JSONHttpRequest'};
/**
* called after successful upload
*
* @name Uploader.checkCryptParameters
* @private
* @function
* @throws {string}
*/
function checkCryptParameters()
{
// workaround for this nasty 'bug' in ECMAScript
// see https://stackoverflow.com/questions/18808226/why-is-typeof-null-object
var typeOfKey = typeof symmetricKey;
if (symmetricKey === null) {
typeOfKey = 'null';
}
// in case of missing preparation, throw error
switch (typeOfKey) {
case 'string':
// already set, all right
return;
case 'null':
// needs to be generated auto-generate
symmetricKey = CryptTool.getSymmetricKey();
break;
default:
console.error('current invalid symmetricKey:', symmetricKey);
throw 'symmetricKey is invalid, probably the module was not prepared';
}
// password is optional
}
/**
* called after successful upload
*
* @name Uploader.success
* @private
* @function
* @param {int} status
* @param {int} result - optional
*/
function success(status, result)
{
// add useful data to result
result.encryptionKey = symmetricKey;
result.requestData = data;
if (successFunc !== null) {
successFunc(status, result);
}
}
/**
* called after a upload failure
*
* @name Uploader.fail
* @private
* @function
* @param {int} status - internal code
* @param {int} result - original error code
*/
function fail(status, result)
{
if (failureFunc !== null) {
failureFunc(status, result);
}
}
/**
* actually uploads the data
*
* @name Uploader.run
* @function
*/
me.run = function()
{
$.ajax({
type: 'POST',
url: url,
data: data,
dataType: 'json',
headers: ajaxHeaders,
success: function(result) {
if (result.status === 0) {
success(0, result);
} else if (result.status === 1) {
fail(1, result);
} else {
fail(2, result);
}
}
})
.fail(function(jqXHR, textStatus, errorThrown) {
console.error(textStatus, errorThrown);
fail(3, jqXHR);
});
}
/**
* set success function
*
* @name Uploader.setUrl
* @function
* @param {function} newUrl
*/
me.setUrl = function(newUrl)
{
url = newUrl;
}
/**
* sets the password to use (first value) and optionally also the
* encryption key (not recommend, it is automatically generated).
*
* Note: Call this after prepare() as prepare() resets these values.
*
* @name Uploader.setCryptValues
* @function
* @param {string} newPassword
* @param {string} newKey - optional
*/
me.setCryptParameters = function(newPassword, newKey)
{
password = newPassword;
if (typeof newKey !== 'undefined') {
symmetricKey = newKey;
}
}
/**
* set success function
*
* @name Uploader.setSuccess
* @function
* @param {function} func
*/
me.setSuccess = function(func)
{
successFunc = func;
}
/**
* set failure function
*
* @name Uploader.setFailure
* @function
* @param {function} func
*/
me.setFailure = function(func)
{
failureFunc = func;
}
/**
* prepares a new upload
*
* Call this when doing a new upload to reset any data from potential
* previous uploads. Must be called before any other method of this
* module.
*
* @name Uploader.prepare
* @function
* @return {object}
*/
me.prepare = function()
{
// entropy should already be checked!
// reset password
password = '';
// reset key, so it a new one is generated when it is used
symmetricKey = null;
// reset data
successFunc = null;
failureFunc = null;
url = Helper.baseUri();
data = {};
}
/**
* encrypts and sets the data
*
* @name Uploader.setData
* @function
* @param {string} index
* @param {mixed} element
*/
me.setData = function(index, element)
{
checkCryptParameters();
data[index] = CryptTool.cipher(symmetricKey, password, element);
}
/**
* set the additional metadata to send unencrypted
*
* @name Uploader.setUnencryptedData
* @function
* @param {string} index
* @param {mixed} element
*/
me.setUnencryptedData = function(index, element)
{
data[index] = element;
}
/**
* set the additional metadata to send unencrypted passed at once
*
* @name Uploader.setUnencryptedData
* @function
* @param {object} newData
*/
me.setUnencryptedBulkData = function(newData)
{
$.extend(data, newData);
}
/**
* Helper, which parses shows a general error message based on the result of the Uploader
*
* @name Uploader.parseUploadError
* @function
* @param {int} status
* @param {object} data
* @param {string} doThisThing - a human description of the action, which was tried
* @return {array}
*/
me.parseUploadError = function(status, data, doThisThing) {
var errorArray;
switch (status) {
case me.error['custom']:
errorArray = ['Could not ' + doThisThing + ': %s', data.message];
break;
case me.error['unknown']:
errorArray = ['Could not ' + doThisThing + ': %s', I18n._('unknown status')];
break;
case me.error['serverError']:
errorArray = ['Could not ' + doThisThing + ': %s', I18n._('server error or not responding')];
break;
default:
errorArray = ['Could not ' + doThisThing + ': %s', I18n._('unknown error')];
break;
}
return errorArray;
}
/**
* init Uploader
*
* @name Uploader.init
* @function
*/
me.init = function()
{
// nothing yet
}
return me;
})();
/**
* (controller) Responsible for encrypting paste and sending it to server.
*
* Does upload, encryption is done transparently by Uploader.
*
* @name PasteEncrypter
* @class
*/
var PasteEncrypter = (function () {
var me = {};
var requirementsChecked = false;
/**
* checks whether there is a suitable amount of entrophy
*
* @name PasteEncrypter.checkRequirements
* @private
* @function
* @param {function} retryCallback - the callback to execute to retry the upload
* @return {bool}
*/
function checkRequirements(retryCallback) {
// skip double requirement checks
if (requirementsChecked === true) {
return true;
}
if (!CryptTool.isEntropyReady()) {
// display a message and wait
Alert.showStatus('Please move your mouse for more entropy…');
CryptTool.addEntropySeedListener(retryCallback);
return false;
}
requirementsChecked = true;
return true;
}
/**
* called after successful paste upload
*
* @name PasteEncrypter.showCreatedPaste
* @private
* @function
* @param {int} status
* @param {object} data
*/
function showCreatedPaste(status, data) {
Alert.hideLoading();
var url = Helper.baseUri() + '?' + data.id + '#' + data.encryptionKey,
deleteUrl = Helper.baseUri() + '?pasteid=' + data.id + '&deletetoken=' + data.deletetoken;
Alert.hideMessages();
// show notification
PasteStatus.createPasteNotification(url, deleteUrl)
// show new URL in browser bar
history.pushState({type: 'newpaste'}, document.title, url);
TopNav.showViewButtons();
TopNav.hideRawButton();
Editor.hide();
// parse and show text
// (preparation already done in me.sendPaste())
PasteViewer.run();
}
/**
* called after successful comment upload
*
* @name PasteEncrypter.showUploadedComment
* @private
* @function
* @param {int} status
* @param {object} data
*/
function showUploadedComment(status, data) {
// show success message
// Alert.showStatus('Comment posted.');
// reload paste
Controller.refreshPaste(function () {
// highlight sent comment
DiscussionViewer.highlightComment(data.id, true);
// reset error handler
Alert.setCustomHandler(null);
});
}
/**
* adds attachments to the Uploader
*
* @name PasteEncrypter.encryptAttachments
* @private
* @function
* @param {File|null|undefined} file - optional, falls back to cloned attachment
* @param {function} callback - excuted when action is successful
*/
function encryptAttachments(file, callback) {
if (typeof file !== 'undefined' && file !== null) {
// check file reader requirements for upload
if (typeof FileReader === 'undefined') {
Alert.showError('Your browser does not support uploading encrypted files. Please use a newer browser.');
// cancels process as it does not execute callback
return;
}
var reader = new FileReader();
// closure to capture the file information
reader.onload = function(event) {
Uploader.setData('attachment', event.target.result);
Uploader.setData('attachmentname', file.name);
// run callback
return callback();
}
// actually read first file
reader.readAsDataURL(file);
} else if (AttachmentViewer.hasAttachment()) {
// fall back to cloned part
var attachment = AttachmentViewer.getAttachment();
Uploader.setData('attachment', attachment[0]);
Uploader.setData('attachmentname', attachment[1]);
return callback();
} else {
// if there are no attachments, this is of course still successful
return callback();
}
}
/**
* send a reply in a discussion
*
* @name PasteEncrypter.sendComment
* @function
*/
me.sendComment = function()
{
Alert.hideMessages();
Alert.setCustomHandler(DiscussionViewer.handleNotification);
// UI loading state
TopNav.hideAllButtons();
Alert.showLoading('Sending comment…', 0, 'cloud-upload');
// get data
var plainText = DiscussionViewer.getReplyMessage(),
nickname = DiscussionViewer.getReplyNickname(),
parentid = DiscussionViewer.getReplyCommentId();
// do not send if there is no data
if (plainText.length === 0) {
// revert loading status…
Alert.hideLoading();
Alert.setCustomHandler(null);
TopNav.showViewButtons();
return;
}
// check entropy
if (!checkRequirements(function () {
me.sendComment();
})) {
return; // to prevent multiple executions
}
Alert.showLoading(null, 10);
// prepare Uploader
Uploader.prepare();
Uploader.setCryptParameters(Prompt.getPassword(), Model.getPasteKey());
// set success/fail functions
Uploader.setSuccess(showUploadedComment);
Uploader.setFailure(function (status, data) {
// revert loading status…
Alert.hideLoading();
TopNav.showViewButtons();
// show error message
Alert.showError(Uploader.parseUploadError(status, data, 'post comment'));
// reset error handler
Alert.setCustomHandler(null);
});
// fill it with unencrypted params
Uploader.setUnencryptedData('pasteid', Model.getPasteId());
if (typeof parentid === 'undefined') {
// if parent id is not set, this is the top-most comment, so use
// paste id as parent @TODO is this really good?
Uploader.setUnencryptedData('parentid', Model.getPasteId());
} else {
Uploader.setUnencryptedData('parentid', parentid);
}
// encrypt data
Uploader.setData('data', plainText);
if (nickname.length > 0) {
Uploader.setData('nickname', nickname);
}
Uploader.run();
}
/**
* sends a new paste to server
*
* @name PasteEncrypter.sendPaste
* @function
*/
me.sendPaste = function()
{
// hide previous (error) messages
Controller.hideStatusMessages();
// UI loading state
TopNav.hideAllButtons();
Alert.showLoading('Sending paste…', 0, 'cloud-upload');
TopNav.collapseBar();
// get data
var plainText = Editor.getText(),
format = PasteViewer.getFormat(),
files = TopNav.getFileList();
// do not send if there is no data
if (plainText.length === 0 && files === null) {
// revert loading status…
Alert.hideLoading();
TopNav.showCreateButtons();
return;
}
Alert.showLoading(null, 10);
// check entropy
if (!checkRequirements(function () {
me.sendPaste();
})) {
return; // to prevent multiple executions
}
// prepare Uploader
Uploader.prepare();
Uploader.setCryptParameters(TopNav.getPassword());
// set success/fail functions
Uploader.setSuccess(showCreatedPaste);
Uploader.setFailure(function (status, data) {
// revert loading status…
Alert.hideLoading();
TopNav.showCreateButtons();
// show error message
Alert.showError(Uploader.parseUploadError(status, data, 'create paste'));
});
// fill it with unencrypted submitted options
Uploader.setUnencryptedBulkData({
expire: TopNav.getExpiration(),
formatter: format,
burnafterreading: TopNav.getBurnAfterReading() ? 1 : 0,
opendiscussion: TopNav.getOpenDiscussion() ? 1 : 0
});
// prepare PasteViewer for later preview
PasteViewer.setText(plainText);
PasteViewer.setFormat(format);
// encrypt cipher data
Uploader.setData('data', plainText);
// encrypt attachments
encryptAttachments(
files === null ? null : files[0],
function () {
// send data
Uploader.run();
}
);
}
/**
* initialize
*
* @name PasteEncrypter.init
* @function
*/
me.init = function()
{
// nothing yet
}
return me;
})();
/**
* (controller) Responsible for decrypting cipherdata and passing data to view.
*
* Only decryption, no download.
*
* @name PasteDecrypter
* @class
*/
var PasteDecrypter = (function () {
var me = {};
/**
* decrypt data or prompts for password in cvase of failure
*
* @name PasteDecrypter.decryptOrPromptPassword
* @private
* @function
* @param {string} key
* @param {string} password - optional, may be an empty string
* @param {string} cipherdata
* @throws {string}
* @return {false|string} false, when unsuccessful or string (decrypted data)
*/
function decryptOrPromptPassword(key, password, cipherdata)
{
// try decryption without password
var plaindata = CryptTool.decipher(key, password, cipherdata);
// if it fails, request password
if (plaindata.length === 0 && password.length === 0) {
// try to get cached password first
password = Prompt.getPassword();
// if password is there, re-try
if (password.length === 0) {
password = Prompt.requestPassword();
}
// recursive
// note: an infinite loop is prevented as the previous if
// clause checks whether a password is already set and ignores
// errors when a password has been passed
return decryptOrPromptPassword.apply(key, password, cipherdata);
}
// if all tries failed, we can only return an error
if (plaindata.length === 0) {
throw 'failed to decipher data';
}
return plaindata;
}
/**
* decrypt the actual paste text
*
* @name PasteDecrypter.decryptOrPromptPassword
* @private
* @function
* @param {object} paste - paste data in object form
* @param {string} key
* @param {string} password
* @param {bool} ignoreError - ignore decryption errors iof set to true
* @return {bool} whether action was successful
* @throws {string}
*/
function decryptPaste(paste, key, password, ignoreError)
{
var plaintext
if (ignoreError === true) {
plaintext = CryptTool.decipher(key, password, paste.data);
} else {
try {
plaintext = decryptOrPromptPassword(key, password, paste.data);
} catch (err) {
throw 'failed to decipher paste text: ' + err
}
if (plaintext === false) {
return false;
}
}
// on success show paste
PasteViewer.setFormat(paste.meta.formatter);
PasteViewer.setText(plaintext);
// trigger to show the text (attachment loaded afterwards)
PasteViewer.run();
return true;
}
/**
* decrypts any attachment
*
* @name PasteDecrypter.decryptAttachment
* @private
* @function
* @param {object} paste - paste data in object form
* @param {string} key
* @param {string} password
* @return {bool} whether action was successful
* @throws {string}
*/
function decryptAttachment(paste, key, password)
{
// decrypt attachment
try {
var attachment = decryptOrPromptPassword(key, password, paste.attachment);
} catch (err) {
throw 'failed to decipher attachment: ' + err
}
if (attachment === false) {
return false;
}
// decrypt attachment name
var attachmentName;
if (paste.attachmentname) {
try {
attachmentName = decryptOrPromptPassword(key, password, paste.attachmentname);
} catch (err) {
throw 'failed to decipher attachment name: ' + err
}
if (attachmentName === false) {
return false;
}
}
AttachmentViewer.setAttachment(attachment, attachmentName);
AttachmentViewer.showAttachment();
return true;
}
/**
* decrypts all comments and shows them
*
* @name PasteDecrypter.decryptComments
* @private
* @function
* @param {object} paste - paste data in object form
* @param {string} key
* @param {string} password
* @return {bool} whether action was successful
*/
function decryptComments(paste, key, password)
{
// remove potentially previous discussion
DiscussionViewer.prepareNewDiscussion();
// iterate over comments
for (var i = 0; i < paste.comments.length; ++i) {
var comment = paste.comments[i];
DiscussionViewer.addComment(
comment,
CryptTool.decipher(key, password, comment.data),
CryptTool.decipher(key, password, comment.meta.nickname)
);
}
DiscussionViewer.finishDiscussion();
return true;
}
/**
* show decrypted text in the display area, including discussion (if open)
*
* @name PasteDecrypter.run
* @function
* @param {Object} [paste] - (optional) object including comments to display (items = array with keys ('data','meta'))
*/
me.run = function(paste)
{
Alert.hideMessages();
Alert.showLoading('Decrypting paste…', 0, 'cloud-download'); // @TODO icon maybe rotation-lock, but needs full Glyphicons
if (typeof paste === 'undefined') {
paste = $.parseJSON(Model.getCipherData());
}
var key = Model.getPasteKey(),
password = Prompt.getPassword();
if (PasteViewer.isPrettyPrinted()) {
console.error('Too pretty! (don\'t know why this check)'); //@TODO
return;
}
// try to decrypt the paste
try {
// decrypt attachments
if (paste.attachment) {
// try to decrypt paste and if it fails (because the password is
// missing) return to let JS continue and wait for user
if (!decryptAttachment(paste, key, password)) {
return;
}
// ignore empty paste, as this is allowed when pasting attachments
decryptPaste(paste, key, password, true);
} else {
decryptPaste(paste, key, password);
}
// shows the remaining time (until) deletion
PasteStatus.showRemainingTime(paste.meta);
// if the discussion is opened on this paste, display it
if (paste.meta.opendiscussion) {
decryptComments(paste, key, password);
}
Alert.hideLoading();
TopNav.showViewButtons();
} catch(err) {
Alert.hideLoading();
// log and show error
console.error(err);
Alert.showError('Could not decrypt data (Wrong key?)');
}
}
/**
* initialize
*
* @name PasteDecrypter.init
* @function
*/
me.init = function()
{
// nothing yet
}
return me;
})();
/**
* (controller) main PrivateBin logic
*
* @name Controller
* @param {object} window
* @param {object} document
* @class
*/
var Controller = (function (window, document) {
var me = {};
/**
* hides all status messages no matter which module showed them
*
* @name Controller.hideStatusMessages
* @function
*/
me.hideStatusMessages = function()
{
PasteStatus.hideMessages();
Alert.hideMessages();
}
/**
* creates a new paste
*
* @name Controller.newPaste
* @function
*/
me.newPaste = function()
{
// Important: This *must not* run Alert.hideMessages() as previous
// errors from viewing a paste should be shown.
TopNav.hideAllButtons();
Alert.showLoading('Preparing new paste…', 0, 'time');
PasteStatus.hideMessages();
PasteViewer.hide();
Editor.resetInput();
Editor.show();
Editor.focusInput();
TopNav.showCreateButtons();
Alert.hideLoading();
}
/**
* shows the loaded paste
*
* @name Controller.showPaste
* @function
*/
me.showPaste = function()
{
try {
Model.getPasteId();
Model.getPasteKey();
} catch (err) {
console.error(err);
// missing decryption key (or paste ID) in URL?
if (window.location.hash.length === 0) {
Alert.showError('Cannot decrypt paste: Decryption key missing in URL (Did you use a redirector or an URL shortener which strips part of the URL?)');
// @TODO adjust error message as it is less specific now, probably include thrown exception for a detailed error
return;
}
}
// show proper elements on screen
PasteDecrypter.run();
}
/**
* refreshes the loaded paste to show potential new data
*
* @name Controller.refreshPaste
* @function
* @param {function} callback
*/
me.refreshPaste = function(callback)
{
// save window position to restore it later
var orgPosition = $(window).scrollTop();
Uploader.prepare();
Uploader.setUrl(Helper.baseUri() + '?' + Model.getPasteId());
Uploader.setFailure(function (status, data) {
// revert loading status…
Alert.hideLoading();
TopNav.showViewButtons();
// show error message
Alert.showError(Uploader.parseUploadError(status, data, 'refresh display'));
})
Uploader.setSuccess(function (status, data) {
PasteDecrypter.run(data);
// restore position
window.scrollTo(0, orgPosition);
callback();
})
Uploader.run();
}
/**
* clone the current paste
*
* @name Controller.clonePaste
* @function
* @param {Event} event
*/
me.clonePaste = function(event)
{
TopNav.collapseBar();
TopNav.hideAllButtons();
Alert.showLoading('Cloning paste…', 0, 'transfer');
// hide messages from previous paste
me.hideStatusMessages();
// erase the id and the key in url
history.pushState({type: 'clone'}, document.title, Helper.baseUri());
if (AttachmentViewer.hasAttachment()) {
AttachmentViewer.moveAttachmentTo(
TopNav.getCustomAttachment(),
'Cloned: \'%s\''
);
TopNav.hideFileSelector();
AttachmentViewer.hideAttachment();
// NOTE: it also looks nice without removing the attachment
// but for a consistent display we remove it…
AttachmentViewer.hideAttachmentPreview();
TopNav.showCustomAttachment();
// show another status message to make the user aware that the
// file was cloned too!
Alert.showStatus(
[
'The cloned file \'%s\' was attached to this paste.',
AttachmentViewer.getAttachment()[1]
], 'copy', true, true);
}
Editor.setText(PasteViewer.getText())
PasteViewer.hide();
Editor.show();
Alert.hideLoading();
TopNav.showCreateButtons();
}
/**
* removes a saved paste
*
* @name Controller.removePaste
* @function
* @param {string} pasteId
* @param {string} deleteToken
*/
me.removePaste = function(pasteId, deleteToken) {
// unfortunately many web servers don't support DELETE (and PUT) out of the box
// so we use a POST request
Uploader.prepare();
Uploader.setUrl(Helper.baseUri() + '?' + pasteId);
Uploader.setUnencryptedData('deletetoken', deleteToken);
Uploader.setFailure(function () {
Alert.showError(I18n._('Could not delete the paste, it was not stored in burn after reading mode.'));
})
Uploader.run();
}
/**
* application start
*
* @name Controller.init
* @function
*/
me.init = function()
{
// first load translations
I18n.loadTranslations();
DOMPurify.setConfig({SAFE_FOR_JQUERY: true});
// initialize other modules/"classes"
Alert.init();
Model.init();
AttachmentViewer.init();
DiscussionViewer.init();
Editor.init();
PasteDecrypter.init();
PasteEncrypter.init();
PasteStatus.init();
PasteViewer.init();
Prompt.init();
TopNav.init();
UiHelper.init();
Uploader.init();
// display an existing paste
if (Model.hasCipherData()) {
return me.showPaste();
}
// otherwise create a new paste
me.newPaste();
}
return me;
})(window, document);
return {
Helper: Helper,
I18n: I18n,
CryptTool: CryptTool,
Model: Model,
UiHelper: UiHelper,
Alert: Alert,
PasteStatus: PasteStatus,
Prompt: Prompt,
Editor: Editor,
PasteViewer: PasteViewer,
AttachmentViewer: AttachmentViewer,
DiscussionViewer: DiscussionViewer,
TopNav: TopNav,
Uploader: Uploader,
PasteEncrypter: PasteEncrypter,
PasteDecrypter: PasteDecrypter,
Controller: Controller
};
}(jQuery, sjcl, Base64, RawDeflate);