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;;; mastodon-tl.el --- HTTP request/response functions for mastodon.el
;; Copyright (C) 2017 Johnson Denen
;; Author: Johnson Denen <johnson.denen@gmail.com>
;; Homepage: https://github.com/jdenen/mastodon.el
;; This file is not part of GNU Emacs.
;; This file is part of mastodon.el.
;; mastodon.el 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.
;; mastodon.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 General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with mastodon.el. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; mastodon-tl.el provides timeline functions.
;;; Code:
(require 'mastodon-http)
(defgroup mastodon-tl nil
"Timelines in Mastodon."
:prefix "mastodon-tl-"
:group 'mastodon)
(defface mastodon-tl-toot-text-face
'((t (:foreground "LightGray")))
"Toot content face.")
(defface mastodon-tl-toot-display-name-face
'((t (:foreground "cyan")))
"Mastodon user handle face.")
(defun mastodon-tl--get-federated-timeline ()
"Opens federated timeline."
(interactive)
(mastodon-tl--get "public"))
(defun mastodon-tl--get-home-timeline ()
"Opens home timeline."
(interactive)
(mastodon-tl--get "home"))
(defun mastodon-tl--get-local-timeline ()
"Opens local timeline."
(interactive)
(mastodon-tl--get "public?local=true"))
(defun mastodon-tl--get-tag-timeline ()
"Prompts for tag and opens its timeline."
(interactive)
(let ((tag (read-string "Tag: ")))
(mastodon-tl--get (concat "tag/" tag))))
(defun mastodon-tl--from-toot (key toot)
"Return value for KEY in TOOT."
(cdr (assoc key toot)))
(defun mastodon-tl--goto-toot-pos (find-pos &optional pos)
"Search for toot with FIND-POS. Optionally stat from POS."
(let* ((npos (funcall find-pos
(or pos (point))
'toot-id
(current-buffer))))
(when npos (if (not (get-text-property npos 'toot-id))
(mastodon-tl--goto-toot-pos find-pos npos)
(when npos (goto-char npos))))))
(defun mastodon-tl--goto-next-toot ()
"Jump to next toot header."
(interactive)
(mastodon-tl--goto-toot-pos 'next-single-property-change))
(defun mastodon-tl--goto-prev-toot ()
"Jump to last toot header."
(interactive)
(mastodon-tl--goto-toot-pos 'previous-single-property-change))
(defun mastodon-tl--header (handle name id)
"Create header string with toot properties.
HANDLE is the username.
NAME is the display name.
ID is the toot id."
(propertize
(concat "=== "
(propertize name 'face 'mastodon-tl-toot-display-name-face)
" @"
handle
"\n")
'toot-id id))
(defun mastodon-tl--remove-html (toot)
"Remove HTML from TOOT."
(let* ((t1 (replace-regexp-in-string "<\/p>" "\n\n" toot))
(t2 (replace-regexp-in-string "<\/?span>" "" t1))
(t3 (replace-regexp-in-string "<span class=\"h-card\">" "" t2)))
t3))
(defun mastodon-tl--content (toot)
"Distill content to display from TOOT."
(let* ((content (mastodon-tl--remove-html toot)))
(propertize content
'face 'mastodon-tl-toot-text-face)))
(defun mastodon-tl--render-toot (toot)
"Display TOOT with header and content sections."
(let ((id (number-to-string (mastodon-tl--from-toot 'id toot)))
(handle (mastodon-tl--from-toot 'acct (mastodon-tl--from-toot 'account toot)))
(name (mastodon-tl--from-toot 'display_name (mastodon-tl--from-toot 'account toot)))
(text (mastodon-tl--from-toot 'content toot))
(url (mastodon-tl--from-toot 'url toot)))
(insert
(propertize
(concat
(mastodon-tl--header handle name id)
(mastodon-tl--content text)
"\n")
'toot-url url))))
(defun mastodon-tl--render-timeline (buffer json)
"Display toots in BUFFER. Data taken from JSON."
(switch-to-buffer buffer)
(mapcar 'mastodon-tl--render-toot json)
(html2text))
(defun mastodon-tl--timeline-name ()
"Determine timeline from `buffer-name'."
(replace-regexp-in-string "\*" ""
(replace-regexp-in-string "mastodon-" "" (buffer-name))))
(defun mastodon-tl--update ()
"Update timeline with new toots."
(interactive)
(let* ((tl (mastodon-tl--timeline-name))
(id (get-text-property (point-min) 'toot-id))
(url (mastodon--api-for (concat "timelines/" tl "?since_id=" id))))
(with-current-buffer (current-buffer)
(let ((inhibit-read-only t)
(json (mastodon-http--get-json url)))
(goto-char (point-min))
(mastodon-tl--render-timeline (current-buffer) json)))))
(defun mastodon-tl--get (timeline)
"Display toots for TIMELINE in new buffer."
(let* ((url (mastodon--api-for (concat "timelines/" timeline)))
(tl-buff (concat "*mastodon-" timeline "*"))
(tl-json (mastodon-http--get-json url)))
(with-output-to-temp-buffer tl-buff
(mastodon-tl--render-timeline tl-buff tl-json))
(mastodon-mode)))
(provide 'mastodon-tl)
;;; mastodon-tl.el ends here
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