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+;;; jao-mullvad.el --- Calling the mullvad cli -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2021 jao
+
+;; Author: jao <mail@jao.io>
+;; Keywords: processes
+
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; This program 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 General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; Simple helpers to call mullvad and parse its output
+
+;;; Code:
+
+(defvar jao-mullvad-mode-map
+ (let ((map (make-keymap)))
+ (suppress-keymap map)
+ (define-key map [?q] 'bury-buffer)
+ (define-key map [?n] 'next-line)
+ (define-key map [?p] 'previous-line)
+ (define-key map [?g] 'jao-mullvad-status)
+ (define-key map [?l] 'jao-mullvad-list)
+ (define-key map [?u] 'jao-mullvad-update-list)
+ (define-key map [?r] 'jao-mullvad-reconnect)
+ (define-key map [?d] 'jao-mullvad-disconnect)
+ (define-key map [?c] 'jao-mullvad-connect)
+ map))
+
+(defvar jao-mullvad--buffer "*mullvad*")
+
+;;;###autoload
+(defun jao-mullvad-mode ()
+ "A very simple mode to show the output of mulvad commands."
+ (interactive)
+ (kill-all-local-variables)
+ (buffer-disable-undo)
+ (use-local-map jao-mullvad-mode-map)
+ ;; (setq-local font-lock-defaults '(jao-jao-mullvad-font-lock-keywords))
+ (setq-local truncate-lines t)
+ (setq-local next-line-add-newlines nil)
+ (setq major-mode 'jao-mullvad-mode)
+ (setq mode-name "mullvad")
+ (read-only-mode 1))
+
+(defun jao-mullvad--do (things &optional buffer)
+ "Execute a mullvad command THINGS in the given BUFFER."
+ (let ((b (or buffer (pop-to-buffer (get-buffer-create jao-mullvad--buffer)))))
+ (let ((inhibit-read-only t)
+ (cmd (format "mullvad %s" things)))
+ (delete-region (point-min) (point-max))
+ (message "Running: %s ...." cmd)
+ (shell-command cmd b)
+ (message ""))
+ (jao-mullvad-mode)))
+
+(defconst jao-mullvad--country-rx "^\\([^ \t\n]+ (...?)\\)$")
+(defconst jao-mullvad--city-rx " \\([^ (]+ (...)\\)")
+
+(defun jao-mullvad--list ()
+ "Compute an alist of available relay countries with their cities."
+ (with-temp-buffer
+ (jao-mullvad--do "relay list" (current-buffer))
+ (goto-char (point-min))
+ (let ((countries) (country))
+ (while (not (eobp))
+ (cond ((looking-at jao-mullvad--country-rx)
+ (when country
+ (setq countries (cons (reverse country) countries)))
+ (setq country (list (match-string 1))))
+ ((looking-at jao-mullvad--city-rx)
+ (setq country (cons (match-string 1) country))))
+ (forward-line 1))
+ (reverse countries))))
+
+;;;###autoload
+(defun jao-mullvad-status ()
+ "Display mullvad connection status, including country, city and server."
+ (interactive)
+ (jao-mullvad--do "status")
+ (when (re-search-forward "[0-9]+\\.[0-9]+\\.[0-9]+\\.[0-9]+" nil t)
+ (let ((ip (match-string 0)) (country "") (city "") (server ""))
+ (with-temp-buffer
+ (jao-mullvad--do "relay list" (current-buffer))
+ (goto-char (point-min))
+ (when (search-forward ip nil t)
+ (beginning-of-line)
+ (when (looking-at "\t\t\\([^( ]+\\) (")
+ (setq server (match-string 1)))
+ (when (re-search-backward jao-mullvad--city-rx nil t)
+ (setq city (string-trim (match-string 0))))
+ (when (re-search-backward jao-mullvad--country-rx nil t)
+ (setq country (match-string 0)))))
+ (let ((inhibit-read-only t))
+ (forward-line 1)
+ (insert "Connected to " country " " city " - " server "\n")
+ (goto-char (point-min))))))
+
+;;;###autoload
+(defun jao-mullvad-connect ()
+ "Choose a country and city and set them to the default relay location."
+ (interactive)
+ (let* ((cc (jao-mullvad--list))
+ (country (completing-read "Country: " (mapcar #'car cc) nil t))
+ (city (completing-read "City: " (cdr (assoc country cc #'string=))))
+ (cntr (and (string-match "(\\(...?\\))" country) (match-string 1 country)))
+ (code (and (string-match "(\\(...\\))" city) (match-string 1 city))))
+ (when (y-or-n-p (format "Set location to %s / %s?" country city))
+ (jao-mullvad--do (format "relay set location %s %s" cntr code)))))
+
+;;;###autoload
+(defun jao-mullvad-reconnect ()
+ "Ask mullvad to reconnect."
+ (interactive)
+ (jao-mullvad--do "reconnect"))
+
+;;;###autoload
+(defun jao-mullvad-disconnect ()
+ "Ask mullvad to disconnect, after confirmation."
+ (interactive)
+ (when (y-or-n-p "Disconnect?") (jao-mullvad--do "disconnect")))
+
+;;;###autoload
+(defun jao-mullvad-list ()
+ "List all available relay locations."
+ (interactive)
+ (jao-mullvad--do "relay list"))
+
+;;;###autoload
+(defun jao-mullvad-update-list ()
+ "Update list of available relay locations (background operation)."
+ (interactive)
+ (jao-mullvad--do "relay update"))
+
+
+(provide 'jao-mullvad)
+;;; jao-mullvad.el ends here