;;; emacsconf-extract.el --- BigBlueButton               -*- lexical-binding: t; -*-

;; Copyright (C) 2022  Sacha Chua

;; Author: Sacha Chua <sacha@sachachua.com>


;; 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:

;;; Code:

(defun emacsconf-extract-extract-chat (filename)
	(when (file-exists-p filename)
		(message "%s" filename)
		(mapcar
		 (lambda (node)
			 (when (string= (dom-attr node 'target) "chat")
				 (let ((message
								(replace-regexp-in-string
								 "\\[<u>\\([^<]+\\)?</u>\\](\"\\([^<]+\\)\")"
								 "<\\2>"
								 (condition-case nil
										 (html-to-markdown-string (dom-attr node 'message))
									 (error
										(replace-regexp-in-string
										 "<a href=\"\\(.+?\\)\" rel=\"nofollow\"><u>\\(.+?\\)</u></a>"
										 "<\\2>"
										 (dom-attr node 'message)))))))
					 (list (string-to-number (dom-attr node 'in)) (dom-attr node 'name) message))))
		 (dom-by-tag (xml-parse-file filename) 'chattimeline))))
;; (emacsconf-extract-extract-chat (expand-file-name "bbb-playbacks/haskell/slides_new.xml" emacsconf-cache-dir)) 

(defvar emacsconf-extract-bbb-chat-use-wall-clock-time nil
	"Non-nil means use wall clock time for logs.")
(defun emacsconf-extract-chats ()
	(interactive)
	(mapc (lambda (o)
					(let* ((playback-dir (expand-file-name (plist-get o :slug)
																								 (expand-file-name "bbb-playbacks" emacsconf-cache-dir)))
								 (chat
									(emacsconf-extract-extract-chat 
									 (expand-file-name
										"slides_new.xml"
										playback-dir)))
								 metadata)
						(when chat
							(setq metadata (xml-parse-file (expand-file-name "metadata.xml"
																															 playback-dir)))
							(let ((recording-start (/ (string-to-number (dom-text
																													 (dom-by-tag metadata 'start_time)))
																				1000)))
								(with-temp-file (expand-file-name (concat (plist-get o :video-slug) "--extract.txt")
																									emacsconf-cache-dir)
									(insert
									 (mapconcat
										(lambda (line)
											(format "`%s` _%s_ %s  \n"
															(if emacsconf-extract-bbb-chat-use-wall-clock-time
																	(format-time-string "%H:%M:%S"
																											(seconds-to-time
																											 (+ recording-start
																													(elt line 0))))
																(format-seconds "%h:%.2m:%.2s"
																								(elt line 0)))
															(elt line 1)
															(elt line 2)))
										chat
										"")))))))
				(emacsconf-prepare-for-display (emacsconf-get-talk-info))))

(defun emacsconf-extract-bbb-copy-files ()
	(interactive)
	(mapc
	 (lambda (o)
		 (let ((playback-dir (expand-file-name (plist-get o :slug)
																					 (expand-file-name "bbb-playbacks" emacsconf-cache-dir))))
			 (mapc (lambda (file)
							 (when (and (file-exists-p (expand-file-name file playback-dir))
													(not (file-exists-p (expand-file-name (concat (plist-get o :video-slug) "--bbb-" file) emacsconf-cache-dir))))
								 (copy-file (expand-file-name file playback-dir)
														(expand-file-name (concat (plist-get o :video-slug) "--bbb-" file) emacsconf-cache-dir)
														t)))
						 '("webcams.webm" "metadata.xml" "deskshare.webm" "deskshare.xml" "slides_new.xml" "webcams.opus"))))
	 (emacsconf-prepare-for-display (emacsconf-get-talk-info))))


(provide 'emacsconf-extract)
;;; emacsconf-extract.el ends here