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;;; wiki-utils.el -- wiki utility functions -*- lexical-binding: t -*-
;; Copyright (C) 2023 Free Software Foundation.
;; Author: Yuchen Pei <id@ypei.org>
;; Package-Requires: ((emacs "28.2"))
;; This file is part of wiki.el.
;; wiki.el is free software: you can redistribute it and/or modify it under
;; the terms of the GNU Affero General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; wiki.el is distributed in the hope that it will be useful, but WITHOUT
;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
;; or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General
;; Public License for more details.
;; You should have received a copy of the GNU Affero General Public
;; License along with wiki.el. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;; wiki utility functions.
;;; Code:
(require 'url-parse)
(defvar wiki-local-dir (locate-user-emacs-file "wiki")
"Path to local directory of wiki files.")
(defvar wiki-fetch-prefer-local t
"If non-nil, visit the local file if exists when instructed for
fetching.")
(defun wiki-fetch-url (url dir &optional callback title)
"Fetch URL asynchronously.
Then calls CALLBACK which is a closure taking no argument."
(interactive "sURL: ")
(let ((file-name (expand-file-name
(or title (wiki-make-file-name-from-url url))
dir))
(cb (lambda (status file-name)
(wiki-fetch-url-save-and-switch status file-name)
(when callback (funcall callback)))))
(url-retrieve url cb (list file-name)))
)
(defun wiki-fetch-url-save-and-switch (status file-name)
(when (plist-get status :error)
(error "Wiki fetch failed: %s" (plist-get status :error)))
(wiki-delete-http-header)
(let ((to-insert (buffer-string))
(buffer (find-file-noselect file-name))
(coding-system-for-write 'utf-8))
(kill-buffer)
(with-current-buffer buffer
(insert to-insert)
(goto-char (point-min))
(save-buffer)
(revert-buffer t t))
(switch-to-buffer buffer))
)
(defun wiki-delete-http-header ()
(delete-region (point-min) (progn (wiki-skip-http-header) (point))))
(defun wiki-skip-http-header ()
(goto-char (point-min))
(re-search-forward "\r?\n\r?\n"))
(defun wiki-make-file-name-from-url (url)
(file-name-nondirectory
(directory-file-name
(car (url-path-and-query (url-generic-parse-url
(url-unhex-string url)))))))
;; TODO: add wikihow; generalise fandom
;; TODO: default engine to mediawiki
(defvar wiki-sites
'((local)
(archwiki :base-url "https://wiki.archlinux.org/title/"
:engine mediawiki
:display-name "ArchWiki")
(debian-wiki :base-url "https://wiki.debian.org/"
:engine moinmoin
:display-name "Debian Wiki")
(emacswiki :base-url "https://www.emacswiki.org/emacs/"
:engine oddmuse
:display-name "EmacsWiki")
(esp :base-url "https://wiki.endsoftwarepatents.org/wiki/"
:engine mediawiki
:display-name "ESP Wiki")
(fandom-recipes :base-url "https://recipes.fandom.com/wiki/"
:engine mediawiki
:display-name "Fandom Recipes Wiki")
(fsd :base-url "https://directory.fsf.org/wiki/"
:engine mediawiki
:display-name "Free Software Directory")
(haskell-wiki :base-url "https://wiki.haskell.org/"
:engine mediawiki
:display-name "Haskell Wiki")
(libreplanet :base-url "https://libreplanet.org/wiki/"
:engine mediawiki
:display-name "Libreplanet Wiki")
(oddmuse :base-url "https://oddmuse.org/wiki/"
:engine oddmuse
:display-name "Oddmuse")
(parabolawiki :base-url "https://wiki.parabola.nu/"
:engine mediawiki
:display-name "ParabolaWiki")
(python-wiki :base-url "https://wiki.python.org/moin/"
:engine moinmoin
:display-name "Python Wiki")
(termux-wiki :base-url "https://wiki.termux.com/wiki/"
:engine mediawiki
:display-name "Termux Wiki")
(ubuntu-wiki :base-url "https://wiki.ubuntu.com/"
:engine moinmoin
:display-name "Ubuntu Wiki")
(ubuntu-community-help-wiki
:base-url "https://help.ubuntu.com/community/"
:engine moinmoin
:display-name "Ubuntu Community Help Wiki")
(wikiindex :base-url "https://wikiindex.org/"
:engine mediawiki
:display-name "WikiIndex")
(wikipedia-en :base-url "https://en.wikipedia.org/wiki/"
:engine mediawiki
:display-name "Wikipedia EN")
(wikipedia-zh :base-url "https://zh.wikipedia.org/wiki/"
:engine mediawiki
:display-name "Wikipedia ZH")
(wikivoyage-en :base-url "https://en.wikivoyage.org/wiki/"
:engine mediawiki
:display-name "Wikivoyage EN")
(wiktionary-en :base-url "https://en.wiktionary.org/wiki/"
:engine mediawiki
:display-name "Wiktionary EN")
)
"Alist of wiki sites.
Each item is in the form of (identifier . properties), where
identifier is a symbol, and properties is a plist of the site.
One of the sites is (local), meaning a local filesystem.")
(defun wiki-site-fetcher (wiki-site)
(if wiki-site
(intern (format "wiki-%s-fetch" wiki-site))
'wiki-find-file))
(provide 'wiki-utils)
;;; wiki-utils.el ends here
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