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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-download-dir "~/Downloads")
(defun wiki-fetch-url (url &optional callback)
"Fetch URL asynchronously.
Then calls CALLBACK which is a closure taking no argument."
(interactive "sURL: ")
(let ((file-name (expand-file-name (wiki-make-file-name-from-url url)
wiki-download-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)
(unless (plist-get status :error)
(wiki-delete-http-header)
(write-file file-name)
(let ((coding-system-for-read 'utf-8))
(revert-buffer t t))
(switch-to-buffer (current-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)))))))
(defvar wiki-sites
'((local)
(wikipedia-en :base-url "https://en.wikipedia.org/wiki/"
:engine mediawiki
:display-name "Wikipedia EN")
(wiktionary-en :base-url "https://en.wiktionary.org/wiki/"
:engine mediawiki
:display-name "Wiktionary EN")
(emacswiki :base-url "https://www.emacswiki.org/emacs/"
:engine oddmuse
:display-name "EmacsWiki")
(debianwiki :base-url "https://wiki.debian.org/"
:engine moinmoin
:display-name "Debian Wiki"))
"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)
(intern (format "wiki-%s-fetch" wiki-site)))
(provide 'wiki-utils)
;;; wiki-utils.el ends here
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