1 // Copyright (c) 2016-2022 by the citadel.org team
3 // This program is open source software. Use, duplication, or
4 // disclosure are subject to the GNU General Public License v3.
7 // Function to encode data in quoted-printable format
8 // Written by Theriault and Brett Zamir [https://locutus.io/php/quoted_printable_encode/]
9 function quoted_printable_encode(str) {
10 const hexChars = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F']
11 const RFC2045Encode1IN = / \r\n|\r\n|[^!-<>-~ ]/gm
12 const RFC2045Encode1OUT = function (sMatch) {
13 // Encode space before CRLF sequence to prevent spaces from being stripped
14 // Keep hard line breaks intact; CRLF sequences
15 if (sMatch.length > 1) {
16 return sMatch.replace(' ', '=20');
18 // Encode matching character
19 const chr = sMatch.charCodeAt(0);
20 return '=' + hexChars[((chr >>> 4) & 15)] + hexChars[(chr & 15)];
22 // Split lines to 75 characters; the reason it's 75 and not 76 is because softline breaks are
23 // preceeded by an equal sign; which would be the 76th character. However, if the last line/string
24 // was exactly 76 characters, then a softline would not be needed. PHP currently softbreaks
25 // anyway; so this function replicates PHP.
26 const RFC2045Encode2IN = /.{1,72}(?!\r\n)[^=]{0,3}/g
27 const RFC2045Encode2OUT = function (sMatch) {
28 if (sMatch.substr(sMatch.length - 2) === '\r\n') {
31 return sMatch + '=\r\n';
33 str = str.replace(RFC2045Encode1IN, RFC2045Encode1OUT).replace(RFC2045Encode2IN, RFC2045Encode2OUT);
34 // Strip last softline break
35 return str.substr(0, str.length - 3)
39 // Generate a random string of the specified length
40 // Useful for generating one-time-use div names
41 function randomString() {
42 return Math.random().toString(36).replace('0.','ctdl_' || '');
46 // string escape for html display
47 function escapeHTML(text) {
49 return text.replace(/[\"&<>]/g, function (a) {
60 // string escape for html display
61 function escapeHTMLURI(text) {
63 return text.replace(/./g, function (a) {
64 return '%' + a.charCodeAt(0).toString(16);
69 // string escape for JavaScript string
71 function escapeJS(text) {
73 return text.replace(/[\"\']/g, function (a) {
79 // Convert a UNIX timestamp to the browser's local time
80 // See also: https://timestamp.online/article/how-to-convert-timestamp-to-datetime-in-javascript
81 // In the future we could let the user select from several available formats.
82 function convertTimestamp(timestamp) {
83 var ts = new Date(timestamp * 1000);
84 return(ts.toLocaleString());
88 // An old version of convertTimestamp() did it the hard way.
89 // It used https://gist.github.com/kmaida/6045266 as a reference.
90 // check git history prior to 2022-jul-03 if you want to see it.
93 // Get the value of a cookie from the HTTP session
94 // Shamelessly swiped from https://stackoverflow.com/questions/5639346/what-is-the-shortest-function-for-reading-a-cookie-by-name-in-javascript
95 const getCookieValue = (name) => (
96 document.cookie.match('(^|;)\\s*' + name + '\\s*=\\s*([^;]+)')?.pop() || ''