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;;; reddio.el -- reddit client through reddio -*- lexical-binding: t -*-

;; Copyright (C) 2024  Free Software Foundation, Inc.

;; Author: Yuchen Pei <id@ypei.org>
;; Package-Requires: ((emacs "29.4"))

;; This file is part of dotted.

;; dotted 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.

;; dotted 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 dotted.  If not, see <https://www.gnu.org/licenses/>.

;;; Commentary:

;; reddit client through reddio.

;;; Code:

(defvar reddio-buffer "*reddio*")

(defun reddio-open-url (url)
  (interactive "sReddit link: ")
  (when (string-match "/\\(comments/[^/]+\\)/" url)
    (with-current-buffer (get-buffer-create reddio-buffer)
      (let ((inhibit-read-only t))
        (erase-buffer)
        (when (= 0 (call-process "reddio" nil reddio-buffer nil "print"
                                 (match-string 1 url)))
          (goto-char (point-min)))
        (delete-trailing-whitespace))
      (text-mode)
      (view-mode))
    (display-buffer reddio-buffer)))

(defun reddio-reddit-url-p (url)
  "e.g.
https://www.reddit.com/r/linux/comments/cs3os6/introducing_reddio_a_commandline_interface_for/"
  (let ((urlobj (url-generic-parse-url url)))
    (and (string-match-p "^.*\\<reddit.com$" (url-host urlobj))
         (string-match-p "^/r/[^/]+/comments/[^/]+/.+$" (url-filename urlobj)))))

(provide 'reddio)
;;; reddio.el ends here