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