| 1 | // This file is part of HFS - Copyright 2021-2023, Massimo Melina <a@rejetto.com> - License https://www.gnu.org/licenses/gpl-3.0.txt |
| 2 | |
| 3 | // utilities to pass a list of files via url |
| 4 | |
| 5 | // not easy to find chars that are not allowed in file names both for windows and unix |
| 6 | const URL_LIST_SEPARATOR = '//' |
| 7 | const URL_LIST_SAME_FOLDER = '\0' // nul cannot be a valid file name char, and query encoding carries it as %00 without conflicting with path slashes |
| 8 | |
| 9 | export function encodeUrlList(entries: string[]) { |
| 10 | let previousFolder = '' |
| 11 | return entries.map(entry => { |
| 12 | const slash = entry.lastIndexOf('/') |
| 13 | const folder = slash < 0 ? '' : entry.slice(0, slash + 1) |
| 14 | const name = slash < 0 ? entry : entry.slice(slash + 1) |
| 15 | if (folder && folder === previousFolder) |
| 16 | return URL_LIST_SAME_FOLDER + name |
| 17 | previousFolder = folder |
| 18 | return entry |
| 19 | }).join(URL_LIST_SEPARATOR) |
| 20 | } |
| 21 | |
| 22 | export function decodeUrlList(list?: string) { |
| 23 | let previousFolder = '' |
| 24 | return list?.split(URL_LIST_SEPARATOR).map(entry => { |
| 25 | const sameFolder = entry.startsWith(URL_LIST_SAME_FOLDER) |
| 26 | if (sameFolder && previousFolder) |
| 27 | entry = previousFolder + entry.slice(URL_LIST_SAME_FOLDER.length) |
| 28 | const slash = entry.lastIndexOf('/') |
| 29 | previousFolder = slash < 0 ? '' : entry.slice(0, slash + 1) |
| 30 | return entry |
| 31 | }) |
| 32 | } |