Created
August 26, 2024 15:37
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TypeScript version of rotUrl
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| // From https://github.com/locutusjs/locutus/blob/main/src/php/strings/strtr.js | |
| // but adapted to the all-strings case. | |
| function strtr(str: string, trFrom: string, trTo: string) { | |
| let j = 0; | |
| let lenStr = 0; | |
| let lenFrom = 0; | |
| let istr = ''; | |
| let ret = ''; | |
| let match = false; | |
| // Walk through subject and replace chars when needed | |
| lenStr = str.length; | |
| lenFrom = trFrom.length; | |
| for (let i = 0; i < lenStr; i += 1) { | |
| match = false; | |
| istr = str.charAt(i); | |
| for (j = 0; j < lenFrom; j += 1) { | |
| if (istr === trFrom.charAt(j)) { | |
| match = true; | |
| break; | |
| } | |
| } | |
| if (match) { | |
| ret += trTo.charAt(j); | |
| } else { | |
| ret += str.charAt(i); | |
| } | |
| } | |
| return ret; | |
| } | |
| /** | |
| * Rot35 for URLs. To avoid increasing size during urlencode(), commonly encoded | |
| * chars are mapped to more rarely used chars (end of the uppercase alpha). | |
| * PHP version: https://gist.github.com/mrclay/1225832 | |
| */ | |
| export default function rotUrl(url: string) { | |
| return strtr( | |
| url, | |
| './-:?=&%# ZQXJKVWPY abcdefghijklmnopqrstuvwxyz123456789ABCDEFGHILMNORSTU', | |
| 'ZQXJKVWPY ./-:?=&%# 123456789ABCDEFGHILMNORSTUabcdefghijklmnopqrstuvwxyz', | |
| ); | |
| } |
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