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;;; piem-elfeed.el --- Elfeed integration for piem -*- lexical-binding: t; -*-
;; Copyright (C) 2020 Kyle Meyer
;; Author: Kyle Meyer <kyle@kyleam.com>
;; Keywords: vc, tools
;; Package-Requires: ((emacs "26.3"))
;; 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:
;; This library provides a minor mode, `piem-elfeed-mode', that
;; modifies `piem' variables to teach functions like `piem-inbox' how
;; to extract information from Elfeed buffers.
;;; Code:
(require 'elfeed)
(require 'elfeed-show)
(require 'piem)
(defgroup piem-elfeed nil
"Elfeed integration for piem."
:group 'piem)
(defun piem-elfeed-get-inbox ()
"Return inbox name from an `elfeed-show-mode' buffer."
(when (derived-mode-p 'elfeed-show-mode)
(when-let ((link (elfeed-entry-link elfeed-show-entry)))
(piem-inbox-by-url-match link))))
(defun piem-elfeed-get-mid ()
"Return the message ID of an `elfeed-show-mode' buffer."
(when-let ((inbox (piem-elfeed-get-inbox))
(inbox-url (piem-inbox-get :url inbox))
(link (elfeed-entry-link elfeed-show-entry)))
(and (string-match (piem-message-link-re inbox-url) link)
(url-unhex-string (match-string 1 link)))))
;;;###autoload
(define-minor-mode piem-elfeed-mode
"Toggle Elfeed support for piem.
With a prefix argument ARG, enable piem-elfeed mode if ARG is
positive, and disable it otherwise. If called from Lisp, enable
the mode if ARG is omitted or nil."
:global t
:init-value nil
(if piem-elfeed-mode
(progn
(add-hook 'piem-get-inbox-functions #'piem-elfeed-get-inbox)
(add-hook 'piem-get-mid-functions #'piem-elfeed-get-mid))
(remove-hook 'piem-get-inbox-functions #'piem-elfeed-get-inbox)
(remove-hook 'piem-get-mid-functions #'piem-elfeed-get-mid)))
;;; piem-elfeed.el ends here
(provide 'piem-elfeed)
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