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;;; livie-playlist.el --- Auxiliary mode to display playlist results
;; Copyright (C) 2018 - 2021
;;; Authors:
;; Charlie Ritter <chewzerita@posteo.net>
;; Jesus E. <heckyel@hyperbola.info>
;; Gabriele Rastello <gabriele.rastello@edu.unito.it>
;; Pablo BC <pablo.barraza@protonmail.com>
;;; Commentary:
;; livie grabs a list of youtube videos based on a search.
;; the user can then select a video to watch through `livie-player'
;;; Code:
(defvar livie-playlist-mode-map
(let ((map (make-sparse-keymap)))
(set-keymap-parent map text-mode-map)
(define-key map "h" #'describe-mode)
(define-key map "q" #'livie--quit-playlist-buffer)
(define-key map ">" #'livie-playlist-next-page)
(define-key map "<" #'livie-playlist-previous-page)
(define-key map (kbd "<tab>") #'next-line)
(define-key map (kbd "<backtab>") #'previous-line)
(define-key map "A" #'livie--open-channel)
(define-key map (kbd "RET") #'livie-open-entry)
(define-key map "y" #'livie-watch-this-video)
map)
"Keymap for `livie-playlist-mode'.")
(define-derived-mode livie-playlist-mode livie-mode
"livie-playlist-mode"
"Mode for displaying livie-playlists.
\\{livie-playlist-mode-map}"
(buffer-disable-undo)
(make-local-variable 'livie-videos)
(make-local-variable 'livie-playlist-title)
(make-local-variable 'livie-playlistId)
(setq-local livie-type-of-results "video")
(setf buffer-read-only t))
(defun livie--process-playlist-videos (videos)
"Process VIDEOS fetched from a playlist."
(dotimes (i (length videos))
(let* ((v (aref videos i)))
(aset videos i (livie-video--create
:title (assoc-default 'title v)
:author (assoc-default 'author v)
:authorId (assoc-default 'authorId v)
:length (assoc-default 'lengthSeconds v)
:id (assoc-default 'videoId v)))))
videos)
(defun livie-playlist--insert-entry (video)
"Insert VIDEO into the playlist buffer."
(insert (livie--format-author (livie-video-author video))
" "
(livie--format-video-length (livie-video-length video))
" "
(livie--format-title (livie-video-title video))))
(defun livie--get-playlist-videos ()
"Fetch the videos of the current playlist."
(let* ((entry (livie-get-current-video)))
(if (livie-playlist-p entry)
(progn
(switch-to-buffer (livie-playlist-title entry))
(unless (eq major-mode 'livie-playlist-mode)
(livie-playlist-mode))
(setf livie-playlistId (livie-playlist-playlistId entry))
(setf livie-playlist-title (livie-playlist-title entry))
(livie-playlist--query livie-playlistId livie-current-page)
(livie-playlist--draw-buffer)))))
(defun livie-playlist-previous-page ()
"Go to the previous page of playlist."
(interactive)
(setf livie-current-page (1- livie-current-page))
(livie-playlist--query livie-playlistId livie-current-page)
(livie-playlist--draw-buffer))
(defun livie-playlist-next-page ()
"Go to the next page of playlist."
(interactive)
(setf livie-current-page (1+ livie-current-page))
(livie-playlist--query livie-playlistId livie-current-page)
(livie-playlist--draw-buffer))
(defun livie-playlist--draw-buffer ()
"Draw buffer for the current playlist."
(let ((inhibit-read-only t))
(erase-buffer)
(setq header-line-format (concat "Displaying videos from " (propertize livie-playlist-title 'face 'livie-parameter-face)
", page "
(propertize (number-to-string livie-current-page) 'face 'livie-parameter-face)))
(seq-do (lambda (v)
(livie-playlist--insert-entry v)
(insert "\n"))
livie-videos)
(goto-char (point-min))))
(defun livie-playlist--query (playlistID page)
"Query Invidious for videos from PLAYLISTID on PAGE."
(let* ((results (livie--API-call (concat "playlists/" livie-playlistId) '(("fields" "videos")
("page" ,livie-current-page)))))
(setf livie-videos (livie--process-playlist-videos (assoc-default 'videos results)))))
(defun livie--quit-playlist-buffer ()
"Deletes the current buffer."
(interactive)
(kill-buffer (current-buffer)))
(provide 'livie-playlist)
;;; livie-playlist.el ends here
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