path: root/emacsconf.el

;;; emacsconf.el --- Core functions and variables for EmacsConf  -*- lexical-binding: t; -*-

;; Copyright (C) 2021  Sacha Chua

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

;; 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:

(defgroup emacsconf nil "EmacsConf" :group 'multimedia)

(defcustom emacsconf-id "emacsconf"
  "ID of conference"
  :group 'emacsconf
  :type 'string)
(defcustom emacsconf-name "EmacsConf"
  "Name of conference"
  :group 'emacsconf
  :type 'string)
(defcustom emacsconf-year "2023"
  "Conference year. String for easy inclusion."
  :group 'emacsconf
  :type 'string)
(defcustom emacsconf-cfp-deadline "2023-09-14" "Deadline for proposals."
	:group 'emacsconf
	:type 'string)
(defcustom emacsconf-date "2023-12-02" "Starting date of EmacsConf."
	:group 'emacsconf
	:type 'string)
(defcustom emacsconf-video-target-date "2023-11-04" "Target date for receiving talk videos from the speakers."
	:group 'emacsconf
	:type 'string)
(defcustom emacsconf-schedule-announcement-date "2023-10-25" "Date for publishing the schedule."
	:group 'emacsconf
	:type 'string)
(defcustom emacsconf-directory "~/vendor/emacsconf-wiki"
  "Directory where the wiki files are."
  :group 'emacsconf
  :type 'directory)
(defcustom emacsconf-ansible-directory nil
  "Directory where the Ansible repository is."
  :group 'emacsconf
  :type 'directory)

(defcustom emacsconf-timezone "US/Eastern" "Main timezone."
  :group 'emacsconf
  :type 'string)

(defcustom emacsconf-timezones '("US/Eastern" "US/Central" "US/Mountain" "US/Pacific" "UTC" "Europe/Paris" "Europe/Athens" "Asia/Kolkata" "Asia/Singapore" "Asia/Tokyo") "List of timezones."
  :group 'emacsconf
  :type '(repeat string))

(defcustom emacsconf-base-url "https://emacsconf.org/" "Includes trailing slash"
  :group 'emacsconf
  :type 'string)
(defcustom emacsconf-publishing-phase 'program
  "Controls what information to include.
'program - don't include times
'schedule - include times; use this leading up to the conference
'conference - show IRC and watching info
'harvest - after EmacsConf, starting to process
'resources - after EmacsConf, publish all the stuff"
  :group 'emacsconf
  :type '(choice
          (const :tag "CFP: include invitation" cfp)
          (const :tag "Program: Don't include times" program)
          (const :tag "Schedule: Include detailed times" schedule)
					(const :tag "Conference: Show IRC and watching info" conference)
          (const :tag "Harvest: Extracting info" conference)
          (const :tag "Resources: Don't include status, publish all Q&A" resources)))

(defcustom emacsconf-backstage-phase 'prerec
	"Contros what information to include backstage.
'prerec - focus on captioning
'harvest - focus on Q&A."
	:group 'emacsconf
	:type '(choice
					(const tag "Prerec" 'prerec)
					(const tag "Q&A harvesting" 'harvest)))

(defcustom emacsconf-org-file nil
  "Path to the Org file with emacsconference information."
  :type 'file
  :group 'emacsconf)

(defcustom emacsconf-upcoming-file nil
  "Path to the Org file with upcoming talks."
  :type 'file
  :group 'emacsconf)

(defcustom emacsconf-emergency-contact nil
  "Emergency contact information."
  :type 'string
  :group 'emacsconf)
(defcustom emacsconf-review-days 7 "Number of days for review for early acceptance."
	:type 'natnum
	:group 'emacsconf)
(defcustom emacsconf-qa-start-open t "Non-nil means start Q&A as open, skipping CLOSED_QA phase."
	:type 'boolean
	:group 'emacsconf)
(defcustom emacsconf-restream-youtube nil "Non-nil means include instructions for restreaming to YouTube."
	:type 'boolean
	:group 'emacsconf)
(defcustom emacsconf-restream-toobnix nil "Non-nil means include instructions for restreaming to Toobnix."
	:type 'boolean
	:group 'emacsconf)
(defvar emacsconf-stream-base "https://live0.emacsconf.org/")
(defvar emacsconf-chat-base "https://chat.emacsconf.org/")
(defvar emacsconf-backstage-dir "/ssh:orga@media.emacsconf.org:/var/www/media.emacsconf.org/2022/backstage")
(defvar emacsconf-upload-dir "/ssh:orga@media.emacsconf.org:/srv/upload")
(defvar emacsconf-res-dir (format "/ssh:orga@res.emacsconf.org:/data/emacsconf/%s" emacsconf-year))
(defvar emacsconf-media-extensions '("webm" "mkv" "mp4" "webm" "mov" "avi" "ts" "ogv" "wav" "ogg" "mp3" ))
(defvar emacsconf-ftp-upload-dir "/ssh:orga@media.emacsconf.org:/srv/ftp/anon/upload-here")
(defvar emacsconf-backstage-user "emacsconf")
(defvar emacsconf-backstage-password nil "Password for backstage area.")
(defvar emacsconf-upload-password nil "Password for file uploads.")
(defvar emacsconf-notebook
  (expand-file-name
   "index.org"
   (expand-file-name "organizers-notebook"
                     (expand-file-name emacsconf-year emacsconf-directory))))

(defun emacsconf-prep-agenda ()
  (interactive)
  (let* ((org-agenda-custom-commands
         `(("a" "Agenda"
            ((tags-todo "-PRIORITY=\"C\"-SCHEDULED={.}-nextyear"
                        ((org-agenda-files (list ,emacsconf-notebook))
												 (org-agenda-sorting-strategy '(priority-down effort-up))))
             (agenda ""
                     ((org-agenda-files (list ,emacsconf-notebook))
                      (org-agenda-span 7)))
             )))))
    (org-agenda nil "a")))

(defun emacsconf-talk-agenda ())

(defun emacsconf-notebook-goto-custom-id (id)
	(interactive "MID: ")
	(find-file-other-window emacsconf-notebook)
	(goto-char (org-find-property "CUSTOM_ID" id)))

(defun emacsconf-ftp-upload-dired ()
  (interactive)
  (dired emacsconf-ftp-upload-dir "-tl"))

(defun emacsconf-upload-dired ()
  (interactive)
  (dired emacsconf-upload-dir "-tl"))

(defun emacsconf-res-upload-dired ()
  (interactive)
  (dired (expand-file-name "upload" emacsconf-res-dir) "-tl"))

(defun emacsconf-backstage-dired ()
  (interactive)
  (dired emacsconf-backstage-dir "-tl"))
(defun emacsconf-res-dired () (interactive) (dired emacsconf-res-dir "-tl"))
(defun emacsconf-media-dired () (interactive) (dired emacsconf-public-media-directory "-tl"))
(defun emacsconf-cache-dired ()
  (interactive)
  (dired emacsconf-cache-dir "-tl"))
(defun emacsconf-slugify (s)
	"Turn S into an ID.
Replace spaces with dashes, remove non-alphanumeric characters,
and downcase the string."
  (replace-regexp-in-string
	 " +" "-"
	 (replace-regexp-in-string
		"[^a-z0-9 ]" ""
		(downcase s))))

(defun emacsconf-file-prefix (talk)
	"Create the file prefix for TALK."
  (concat emacsconf-id "-"
					emacsconf-year "-"
					(plist-get talk :slug) "--"
          (emacsconf-slugify (plist-get talk :title))
          (if (plist-get talk :speakers)
              (concat "--"
                     (emacsconf-slugify (plist-get talk :speakers)))
            "")))

(defun emacsconf-set-file-prefix-if-needed (o)
  (interactive (list (emacsconf-complete-talk-info)))
  (unless (plist-get o :file-prefix)
    (let ((file-prefix
           (read-string "Set video slug: " (emacsconf-file-prefix o))))
      (save-window-excursion
        (emacsconf-with-talk-heading (plist-get o :slug)
          (org-entry-put (point) "FILE_PREFIX" file-prefix)))
      (plist-put o :file-prefix file-prefix)))
  (plist-get o :file-prefix))

(defun emacsconf-set-file-prefixes ()
	"Set the FILE_PREFIX property for each talk entry that needs it."
  (interactive)
  (org-map-entries
   (lambda ()
     (org-entry-put
			(point) "FILE_PREFIX"
			(emacsconf-file-prefix (emacsconf-get-talk-info-for-subtree))))
   "SLUG={.}-FILE_PREFIX={.}"))

(defun emacsconf-upload-to-backstage ()
  (interactive)
  (mapc (lambda (file)
          (copy-file file (expand-file-name (file-name-nondirectory file)
                                            emacsconf-backstage-dir)
                     t)
          (when (and emacsconf-cache-dir
                     (not (string= (expand-file-name (file-name-nondirectory file) default-directory)
                                   (expand-file-name (file-name-nondirectory file) emacsconf-cache-dir))))
            (copy-file file (expand-file-name (file-name-nondirectory file)
                                              emacsconf-cache-dir)
                       t)))
        (or (dired-get-marked-files)
            (list (buffer-file-name)))))

(defun emacsconf-get-srv2-and-upload-to-backstage (talk)
  (interactive (list (emacsconf-complete-talk-info (seq-filter (lambda (o) (plist-get o :youtube-url)) (emacsconf-get-talk-info)))))
  (let ((filename (make-temp-file nil nil "srv2"))
        (buf (get-buffer-create "*test*")))
    (when (plist-get talk :youtube-url)
      (call-process "yt-dlp" nil buf t "--write-sub" "--write-auto-sub" "--no-warnings" "--sub-lang" "en" "--skip-download" "--sub-format" "srv2" "-o" filename
                    (plist-get talk :youtube-url))
      (with-current-buffer (find-file-noselect (concat filename ".en.srv2"))
        (emacsconf-upload-to-backstage-and-rename talk "main--srt")))))

(defun emacsconf-rename-files (talk &optional filename)
	"Rename the marked files or the current file to match TALK.
If FILENAME is specified, use that as the extra part of the filename after the prefix.
This is useful for distinguishing files with the same extension.
Return the list of new filenames."
	(interactive (list (emacsconf-complete-talk-info)))
	(prog1
			(mapcar
			 (lambda (file)
				 (let* ((extra
								 (or filename
										 (read-string (format "Filename (%s): " (file-name-base file)))))
								(new-filename
								 (expand-file-name
									(concat (plist-get talk :file-prefix)
													(if (string= extra "")
															""
														(concat "--" extra))
													"."
													(file-name-extension file))
									(file-name-directory file))))
					 (rename-file file new-filename t)
					 new-filename))
			 (or (dired-get-marked-files) (list (buffer-file-name))))
		(when (derived-mode-p 'dired-mode)
			(revert-buffer))))

(defun emacsconf-update-file-prefixes (talk &optional dry-run)
	"Update all files for the specified SLUG to use the new file prefix."
	(interactive (list (emacsconf-complete-talk-info)))
	(let (results)
		(dolist (dir (list
									emacsconf-cache-dir
									(and emacsconf-res-dir (expand-file-name "cache" emacsconf-res-dir))
									emacsconf-backstage-dir))
			(when (and dir (file-directory-p dir))
				(dolist (file (directory-files dir t (concat "^" emacsconf-id "-" emacsconf-year "-" (plist-get talk :slug) "--.*")))
					(let ((new-file (replace-regexp-in-string
													 (concat "/" emacsconf-id "-" emacsconf-year "-" (plist-get talk :slug) "--.*?--.*?\\(\\(--.*\\)?\.[a-zA-Z0-9]+\\)$")
													 (concat "/" (plist-get talk :file-prefix)
																	 "\\1")
													 file)))
						(unless (string= file new-file)
							(unless dry-run
								(rename-file file new-file))
							(add-to-list 'results (cons file new-file) t))))))
		results))

(defun emacsconf-rename-and-upload-to-backstage (talk &optional filename)
	"Rename marked files or the current file, then upload to backstage."
  (interactive (list (emacsconf-complete-talk-info)))
	(mapc
   (lambda (file)
		 (copy-file
			file
			(expand-file-name
			 (file-name-nondirectory file)
			 emacsconf-backstage-dir)
			t))
	 (emacsconf-rename-files talk)))

(defun emacsconf-rename-and-upload-to-res-cache (talk &optional filename)
	"Rename marked files or the current file, then upload to res cache."
  (interactive (list (emacsconf-complete-talk-info)))
	(mapc
   (lambda (file)
		 (copy-file
			file
			(expand-file-name
			 (file-name-nondirectory file)
			 (expand-file-name "cache"
				emacsconf-res-dir))
			t))
	 (emacsconf-rename-files talk)))

(defun emacsconf-copy-to-cache-and-backstage ()
	"Copy current file to cache and backstage."
	(interactive)
	(let ((file (buffer-file-name)))
		(dolist (dir (list emacsconf-cache-dir emacsconf-backstage-dir))
			(copy-file
			 file
			 (expand-file-name (file-name-nondirectory file)
												 dir)
			 t))))

(defun emacsconf-upload-copy-from-json (talk key filename)
	"Parse PsiTransfer JSON files and copy the uploaded file to the res directory.
The file is associated with TALK. KEY identifies the file in a multi-file upload.
FILENAME specifies an extra string to add to the file prefix if needed."
  (interactive (let-alist (json-parse-string (buffer-string) :object-type 'alist)
                 (list (emacsconf-complete-talk-info)
                       .metadata.key
                       (read-string (format "Filename: ")))))
  (let ((new-filename (concat (plist-get talk :file-prefix)
                              (if (string= filename "")
                                  filename
                                (concat "--" filename))
                              "."
                              (let-alist (json-parse-string (buffer-string) :object-type 'alist)
                                (file-name-extension .metadata.name)))))
    (copy-file
		 key
     (expand-file-name new-filename (expand-file-name "cache" emacsconf-res-dir))
		 t)))

(defcustom emacsconf-download-directory "~/Downloads"
  "Directory to check for downloaded files."
  :type 'directory
  :group 'emacsconf)

(defun emacsconf-latest-file (path &optional filter)
  "Return the newest file in PATH. Optionally filter by FILTER."
  (car (sort (seq-remove #'file-directory-p (directory-files path 'full filter t)) #'file-newer-than-file-p)))

(defun emacsconf-find-captions-from-slug (search)
	"Edit captions file."
  (interactive (list (emacsconf-complete-talk)))
  (emacsconf-with-talk-heading search (emacsconf-subed-find-captions)))

(defun emacsconf-edit-wiki-page (search)
	"Open the wiki page for the talk matching SEARCH."
  (interactive (list (emacsconf-complete-talk)))
  (setq search (if (stringp search) (emacsconf-get-slug-from-string search)
								 (plist-get search :slug)))
  (find-file-other-window
	 (expand-file-name
		(concat search ".md")
    (expand-file-name "talks" (expand-file-name emacsconf-year emacsconf-directory)))))

(defun emacsconf-find-caption-directives-from-slug (search)
  (interactive (list (emacsconf-complete-talk)))
  (setq search (emacsconf-get-slug-from-string search))
  (find-file (expand-file-name (concat search ".md")
                               (expand-file-name "captions" (expand-file-name emacsconf-year emacsconf-directory)))))


(defun emacsconf-browse-wiki-page (search)
  (interactive (list (emacsconf-complete-talk)))
  (setq search (emacsconf-get-slug-from-string search))
  (browse-url (concat emacsconf-base-url emacsconf-year "/talks/" search "/")))

(defun emacsconf-set-property-from-slug (search prop value)
  (interactive (list (emacsconf-complete-talk) nil nil))
  (save-window-excursion
    (emacsconf-with-talk-heading search
      (setq prop (or prop (org-read-property-name)))
      (setq value (or value (org-read-property-value prop)))
      (org-entry-put (point) prop value))))


(defun emacsconf-complete-slug ()
  (emacsconf-get-slug-from-string (emacsconf-complete-talk)))

(defun emacsconf-export-slug (link description format _)
  (let* ((path (format "https://emacsconf.org/%s/talks/%s" emacsconf-year link))
         (talk (emacsconf-resolve-talk link))
				 (desc (or description link)))
    (pcase format
      (`html
       (format "<a href=\"%s\" title=\"%s\">%s</a>" path (plist-get talk :title) desc))
      (`ascii (format "%s (%s)" desc path))
      (`md
       (format "[%s](%s \"%s\")" desc path (plist-get talk :title)))
      (_ path))))

(with-eval-after-load 'org
  (org-link-set-parameters
   "emacsconf"
   :follow #'emacsconf-go-to-talk
   :complete (lambda () (concat "emacsconf:" (emacsconf-complete-slug)))
   :export #'emacsconf-export-slug))

(defvar emacsconf-complete-talk-cache nil)
;; (setq emacsconf-complete-talk-cache (mapcar (lambda (o) (string-join (delq nil (mapcar (lambda (f) (plist-get o f)) '(:slug :title :speakers :irc))) " - ")) (emacsconf-get-talk-info)))

(defun emacsconf-complete-talk (&optional info)
	"Offer talks for completion.
If INFO is specified, limit it to that list."
  (let ((choices
				 (if (and (null info) emacsconf-complete-talk-cache)
						 emacsconf-complete-talk-cache
					 (mapcar (lambda (o)
										 (string-join
											(delq nil
														(mapcar (lambda (f) (plist-get o f))
																		'(:slug :title :speakers :irc)))
											" - "))
									 (or info (emacsconf-get-talk-info))))))
    (completing-read
     "Talk: "
     (lambda (string predicate action)
       (if (eq action 'metadata)
           '(metadata (category . emacsconf))
         (complete-with-action action choices string predicate))))))

(defun emacsconf-complete-talk-info (&optional info)
  (emacsconf-search-talk-info (emacsconf-complete-talk info) info))

(defun emacsconf-get-slug-from-string (search)
  (when (listp search) (setq search (car search)))
  (cond
	 ((and search (stringp search) (string-match "\\(.*?\\) - " search))
		(match-string 1 search))
	 ((and (stringp search) (string-match (concat emacsconf-id "-" emacsconf-year "-\\(.+?\\)--") search))
		(match-string 1 search))
   (t search)))

(defun emacsconf-go-to-talk (search)
	"Jump to the talk heading matching SEARCH."
  (interactive (list (emacsconf-complete-talk)))
  (find-file emacsconf-org-file)
  (widen)
  (cond
   ((plist-get search :slug)
    (goto-char (org-find-property "SLUG" (plist-get search :slug))))
   ((emacsconf-get-slug-from-string search)
    (goto-char (org-find-property "SLUG" (emacsconf-get-slug-from-string search))))
   (t
    (goto-char
     (catch 'found
       (org-map-entries
        (lambda ()
          (when (string-match search
                              (cons
                               (concat (org-entry-get (point) "SLUG") " - "
                                       (org-entry-get (point) "ITEM") " - "
                                       (org-entry-get (point) "NAME") " - "
                                       (org-entry-get (point) "EMAIL"))
                               (point)))
            (throw 'found (point))))
        "SLUG={.}")))))
  (org-reveal))

(defmacro emacsconf-for-each-talk (&rest body)
  (declare (indent 0) (debug t))
  `(org-map-entries (lambda () ,@body) "SLUG={.}"))

(defmacro emacsconf-with-talk-heading (search &rest body)
  (declare (indent 1) (debug t))
  `(progn
     (emacsconf-go-to-talk ,search)
     ,@body))

(defvar emacsconf-status-types
  '(("WAITING_FOR_PREREC" . "Waiting for video from speaker")
    ("TO_PROCESS" . "Processing uploaded video")
    ("PROCESSING" . "Processing uploaded video")
    ("TO_AUTOCAP" . "Processing uploaded video")
    ("TO_ASSIGN" . "Waiting for a caption volunteer")
    ("TO_CAPTION" . "Being captioned")
    ("TO_CHECK" . "Quality check")
    ("TO_STREAM" . "Ready to stream")
    ("PLAYING" . "Now playing on the conference livestream")
    ("CLOSED_Q" . "Q&A starting (not yet open for joining)")
    ("OPEN_Q" . "Q&A open for participation")
    ("UNSTREAMED_Q" . "Q&A continues off the stream")
    ("TO_ARCHIVE" . "Q&A finished, IRC and pad will be archived on this page")
    ("TO_EXTRACT" . "Q&A to be extracted from the room recordings")
    ("DONE" . "All done")
    ("CANCELLED" . "Sorry, this talk has been cancelled")))

(defun emacsconf-get-talk-categories (o)
  (org-narrow-to-subtree)
  (let (list)
    (while (re-search-forward "Category[^ \t\n]+" nil t)
      (setq list (cons (match-string-no-properties 0) list)))
    (plist-put o :categories (reverse list))))

(defun emacsconf-get-talk-info-from-properties (o)
  (let ((heading (org-heading-components))
        (field-props '(
                       ;; Initial creation
                       (:track "TRACK")
                       (:slug "SLUG")
                       (:speakers "NAME")
                       (:speakers-short "NAME_SHORT")
                       (:email "EMAIL")
                       (:public-email "PUBLIC_EMAIL")
                       (:emergency "EMERGENCY")
                       (:buffer "BUFFER")
                       (:min-time "MIN_TIME")
                       (:max-time "MAX_TIME")
                       (:availability "AVAILABILITY")
                       (:q-and-a "Q_AND_A")
                       (:timezone "TIMEZONE")
                       (:irc "IRC")
                       (:pronunciation "PRONUNCIATION")
                       (:pronouns "PRONOUNS")
											 (:date-submitted "DATE_SUBMITTED")
											 (:date-to-notify "DATE_TO_NOTIFY")
											 (:email-notes "EMAIL_NOTES")
                       ;; Scheduling
                       (:scheduled "SCHEDULED")
                       (:time "TIME")
                       (:fixed-time "FIXED_TIME")
                       ;; Coordination
                       (:prerec-info "PREREC_INFO")
                       ;; Prep
                       (:bbb-room "ROOM")
                       ;; Processing
                       (:file-prefix "FILE_PREFIX")
                       (:video-file "VIDEO_FILE")
                       (:video-time "VIDEO_TIME")
                       (:video-file-size "VIDEO_FILE_SIZE")
                       (:video-duration "VIDEO_DURATION")
                       (:stream-files "STREAM_FILES")
                       (:youtube-url "YOUTUBE_URL")
                       (:toobnix-url "TOOBNIX_URL")
											 (:intro-time "INTRO_TIME")
                       ;; Captioning
                       (:captioner "CAPTIONER")
                       (:caption-note "CAPTION_NOTE")
                       (:captions-edited "CAPTIONS_EDITED")
                       ;; Conference
                       (:check-in "CHECK_IN")
                       (:public "PUBLIC")
                       (:intro-note "INTRO_NOTE")
                       (:sched-note "SCHED_NOTE")
                       (:hyperlist-note "HYPERLIST_NOTE")
                       ;; Extraction
                       (:qa-youtube "QA_YOUTUBE")
                       (:qa-toobnix "QA_TOOBNIX")
											 (:bbb-playback "BBB_PLAYBACK")
                       ;; Old
                       (:alternate-apac "ALTERNATE_APAC")
                       (:extra-live-time "EXTRA_LIVE_TIME")
                       (:present "PRESENT")
                       (:talk-id "TALK_ID") ; use slug instead
                       (:qa-public "QA_PUBLIC") ; now tracked by the OPEN_Q and UNSTREAMED_Q status
                       (:uuid "UUID")           ; Pentabarf export
                       )))
    (apply
     'append
     o
     (list
      :point (point)
			:title (org-entry-get (point) "ITEM")
      :year emacsconf-year
      :conf-year emacsconf-year
      :type (if (org-entry-get (point) "SLUG") 'talk 'headline)
      :status (elt heading 2)
      :level (car heading)
      :url (concat emacsconf-year "/talks/" (org-entry-get (point) "SLUG"))
      :schedule-group (org-entry-get-with-inheritance "SCHEDULE_GROUP")
      :wiki-file-path
      (expand-file-name
       (concat (org-entry-get (point) "SLUG") ".md")
       (expand-file-name "captions" (expand-file-name emacsconf-year emacsconf-directory)))
      :start-time
      (when (org-entry-get (point) "SCHEDULED")
		    (date-to-time
		     (concat
		      (format-time-string "%Y-%m-%dT%H:%M:%S"
					                    (org-timestamp-to-time
					                     (org-timestamp-split-range
					                      (org-timestamp-from-string
					                       (org-entry-get (point) "SCHEDULED")))))
		      emacsconf-timezone-offset)))
      :end-time (when (org-entry-get (point) "SCHEDULED")
		              (date-to-time
		               (concat
		                (format-time-string "%Y-%m-%dT%H:%M:%S"
					                              (org-timestamp-to-time
					                               (org-timestamp-split-range
					                                (org-timestamp-from-string
					                                 (org-entry-get (point) "SCHEDULED"))
					                                t)))
		                emacsconf-timezone-offset))))
     (mapcar
      (lambda (prop)
				(list
				 (or (car (rassoc (list (car prop)) field-props))
						 (intern (concat ":" (replace-regexp-in-string "_" "-" (downcase (car prop))))))
				 (cdr prop)))
			(org-entry-properties)))))

(defvar emacsconf-abstract-heading-regexp "abstract" "Regexp matching heading for talk abstract.")

(defun emacsconf-get-subtree-entry (heading-regexp)
	"Return the text for the subtree matching HEADING-REGEXP."
  (car
   (delq nil
         (org-map-entries
          (lambda ()
            (when (string-match heading-regexp (org-entry-get (point) "ITEM"))
              (org-get-entry)))
          nil 'tree))))

(defun emacsconf-get-talk-abstract-from-subtree (o)
  "Add the abstract from a subheading.
The subheading should match `emacsconf-abstract-heading-regexp'."
  (plist-put o :abstract (substring-no-properties (or (emacsconf-get-subtree-entry "abstract") ""))))

(defun emacsconf-get-talk-comments-from-subtree (o)
  (setq o (plist-put o :comments
                     (apply 'append
                            (org-map-entries
                             (lambda ()
                               (org-end-of-meta-data)
                               (mapcar (lambda (item)
                                         (string-trim
                                          (replace-regexp-in-string
                                           " *\n *"
                                           " "
                                           (buffer-substring-no-properties (+ (car item) (length (elt item 2)))
                                                                           (min (point-max) (elt item 6))))))
                                       (org-element-property  :structure (org-element-at-point)))
                               )
                             "ITEM={comments}" 'tree))))
  (plist-put o :acceptance-comment
             (car (delq nil (mapcar
                             (lambda (o)
                               (when (string-match "For the [^ ]+ speakers?: " o)
                                 (replace-match "" t t o)))
                             (plist-get o :comments))))))

(defun emacsconf-convert-talk-abstract-to-markdown (o)
	"Set the :abstract-md property to a Markdown version of the abstract."
  (plist-put o :abstract-md (org-export-string-as (or (plist-get o :abstract) "") 'md t)))

(defun emacsconf-summarize-times (time timezones)
  (let (prev-day)
    (mapconcat
     (lambda (tz)
       (let ((cur-day (format-time-string "%a %b %-e" time tz))
             (cur-time (format-time-string "%H%MH %Z" time tz)))
         (if (equal prev-day cur-day)
             cur-time
           (setq prev-day cur-day)
           (concat cur-day " " cur-time))))
     timezones
     " / ")))

(defun emacsconf-add-timezone-conversions (o)
  (plist-put o :scheduled-tzs
             (concat (org-timestamp-format (plist-get o :start-time) "%a %b %e %l:%M%p Toronto time (")
                     (emacsconf-summarize-times (plist-get o :start-time) emacsconf-timezones)
                     ")")))

(defun emacsconf-get-abstract-from-wiki (o)
  (plist-put o :markdown (emacsconf-talk-markdown-from-wiki (plist-get o :slug))))


(defun emacsconf-add-talk-status (o)
	"Add status label and public info."
  (plist-put o :status-label
             (or (assoc-default (plist-get o :status)
                                emacsconf-status-types 'string= "")
                 (plist-get o :status)))
  (when (or
				 (member (plist-get o :status)
								 (split-string "PLAYING CLOSED_Q OPEN_Q UNSTREAMED_Q TO_ARCHIVE TO_EXTRACT TO_FOLLOW_UP DONE"))
				 (time-less-p (plist-get o :start-time)
											(current-time)))
    (plist-put o :public t))
	(when (eq emacsconf-publishing-phase 'resource)
		(plist-put o :qa-public t))
  o)

(defun emacsconf-talk-live-p (talk)
  "Return non-nil if TALK is ready to be published."
  (plist-get talk :public))

(defun emacsconf-test-public-states ()
  (let ((states (split-string (replace-regexp-in-string "(.*?)" "" "TODO(t) TO_REVIEW TO_ACCEPT TO_CONFIRM WAITING_FOR_PREREC(w) TO_PROCESS(p) TO_AUTOCAP(y) TO_ASSIGN(a) TO_CAPTION(c) TO_STREAM(s) PLAYING(m) CLOSED_Q(q) OPEN_Q(o) UNSTREAMED_Q(u) TO_ARCHIVE TO_EXTRACT TO_FOLLOW_UP"))))
    (mapc (lambda (state) (assert (null (plist-get (emacsconf-add-talk-status
                                                    (list :status state))
                                                   :public))))
          (subseq states
                  0
                  (seq-position
                   states "PLAYING")))
    (mapc (lambda (state) (assert (plist-get (emacsconf-add-talk-status (list
                                                                         :status
                                                                         state))
                                             :public)))
          (subseq states (seq-position
                          states "PLAYING")))))

;; https://stackoverflow.com/questions/55855621/org-mode-getting-logbook-notes
(defun emacsconf-get-logbook-notes ()
	(save-excursion
    (unless (org-at-heading-p)
      (outline-previous-heading))
    (when (re-search-forward ":LOGBOOK:" (save-excursion
                                           (outline-next-heading)
                                           (point))
                             t)
      (let* ((elt (org-element-property-drawer-parser nil))
             (beg (org-element-property :contents-begin elt))
             (end (org-element-property :contents-end elt)))
        (buffer-substring-no-properties beg end)))))

(defun emacsconf-get-talk-logbook (o)
	(plist-put o :logbook (emacsconf-get-logbook-notes)))

(defvar emacsconf-talk-info-functions
  '(emacsconf-get-talk-info-from-properties
    emacsconf-get-talk-categories
    emacsconf-get-talk-abstract-from-subtree
		emacsconf-get-talk-logbook
    emacsconf-add-talk-status
    emacsconf-add-checkin-time
    emacsconf-add-timezone-conversions
    emacsconf-add-speakers-with-pronouns
    emacsconf-add-live-info
		emacsconf-add-video-info)
	"Functions to collect information.")

(defun emacsconf-add-speakers-with-pronouns (o)
  (plist-put o :speakers-with-pronouns
             (cond
              ((null (plist-get o :pronouns)) (plist-get o :speakers))
              ((string= (plist-get o :pronouns) "nil") (plist-get o :speakers))
              ((string-match "(" (plist-get o :pronouns)) (plist-get o :pronouns))
              (t (format "%s (%s)" (plist-get o :speakers) (plist-get o :pronouns)))))
  o)

(defun emacsconf-add-checkin-time (o)
  (unless (or (null (plist-get o :status))
              (string= (plist-get o :status) "CANCELLED")
              (string-match "after" (or (plist-get o :q-and-a) "")))
    (if (null (plist-get o :video-file))
				(progn
					(plist-put o :live-time (plist-get o :start-time))
					(plist-put o :qa-time (plist-get o :live-time))
					(plist-put
					 o :checkin-label
					 "30 minutes before the scheduled start of your talk, since you don't have a pre-recorded video")
					(plist-put
					 o :checkin-time
					 (seconds-to-time (time-subtract (plist-get o :start-time) (seconds-to-time (/ 3600 2))))))
			(plist-put o :live-time
                 (seconds-to-time
									(+
									 (time-to-seconds (plist-get o :start-time))
									 (* 60 (string-to-number (or (plist-get o :video-time) "0")))
									 (* 60 (string-to-number (or (plist-get o :intro-time) "0")))
									 )))
			(unless (string-match "none\\|after" (or (plist-get o :q-and-a) "none"))
				(plist-put o :qa-time
									 (plist-get o :live-time)))
      (plist-put o :checkin-label
                 "30 minutes before the scheduled start of your Q&A, since you have a pre-recorded video")
      (when (plist-get o :video-time)
        (plist-put o :checkin-time
                   (seconds-to-time
										(time-subtract (time-add (plist-get o :start-time)
																						 (seconds-to-time (* 60 (string-to-number (plist-get o :video-time)))))
																	 (seconds-to-time (/ 3600 2))))))))
  o)

(require 'emacsconf-pad)

(defun emacsconf-add-video-info (o)
	(mapc (lambda (field)
					(when
							(and (plist-get o (intern (concat ":" field "-url")))
									 (string-match "\\(?:watch\\?v=\\|https://youtu\\.be/\\|/w/\\)\\(.+\\)\\(?:[?&]\\|$\\)"
																 (plist-get o (intern (concat ":" field "-url")))))
						(plist-put o (intern (concat ":" field "-id"))
											 (match-string 1 (plist-get o (intern (concat ":" field "-url")))) )))
				(list "youtube" "qa-youtube" "toobnix" "qa-toobnix"))
	o)

(defun emacsconf-add-live-info (o)
  (plist-put o :absolute-url (concat emacsconf-base-url (plist-get o :url)))
  (plist-put o :in-between-url (format "%s%s/in-between/%s.png"
																			 emacsconf-media-base-url
																			 emacsconf-year
																			 (plist-get o :slug)))
  (plist-put o :qa-slide-url (format "%s%s/in-between/%s.png"
                                     emacsconf-media-base-url
                                     emacsconf-year
                                     (plist-get o :slug)))
	(plist-put o :intro-expanded (emacsconf-pad-expand-intro o))
	(when (string-match "meetingId=\\(.+\\)" (or (plist-get o :bbb-rec) ""))
		(plist-put o :bbb-meeting-id (match-string 1 (plist-get o :bbb-rec))))
  (let ((track (seq-find (lambda (track) (string= (plist-get o :track) (plist-get track :name)))
												 emacsconf-tracks)))
    (when track
      (plist-put o :watch-url (concat emacsconf-base-url emacsconf-year "/watch/" (plist-get track :id)))
      (plist-put o :webchat-url
								 (concat emacsconf-chat-base "?join=emacsconf"
												 (if (eq emacsconf-publishing-phase 'conference)
														 (concat ","
																		 (replace-regexp-in-string "#" ""
																															 (plist-get track :channel)))
													 "")))
			(plist-put o :track-id (plist-get track :id)))
		(plist-put o :channel (if (eq emacsconf-publishing-phase 'conference) (plist-get track :channel) "emacsconf"))
    (plist-put o :bbb-backstage (concat emacsconf-media-base-url emacsconf-year "/backstage/assets/redirects/open/bbb-" (plist-get o :slug) ".html"))
		(plist-put o :pad-url (format "https://pad.emacsconf.org/%s-%s" emacsconf-year (plist-get o :slug)))
		(cond
     ((string= (or (plist-get o :q-and-a) "") "")
      (plist-put o :qa-info "none")
			(plist-put o :qa-url "")
			(plist-put o :qa-type "none")
      (plist-put o :qa-link ""))
     ((string-match "live" (plist-get o :q-and-a))
      (plist-put o :bbb-redirect (format "https://media.emacsconf.org/%s/current/bbb-%s.html"
																				 emacsconf-year
																				 (plist-get o :slug)))
      (plist-put o :qa-info (plist-get o :bbb-redirect))
			(plist-put o :qa-url (plist-get o :bbb-redirect))
			(plist-put o :qa-backstage-url
								 (format "https://media.emacsconf.org/%s/backstage/assets/redirects/open/bbb-%s.html" emacsconf-year (plist-get o :slug)))
			(plist-put o :qa-type "live")
      (plist-put o :qa-link (format "<a href=\"%s\">BBB</a>" (plist-get o :bbb-redirect))))
     ((string-match "IRC" (plist-get o :q-and-a))
      (plist-put o :qa-info (concat "#" (plist-get o :channel)
                                    (emacsconf-surround ", speaker nick: " (plist-get o :irc) "")))
			(plist-put o :qa-url (plist-get o :webchat-url))
			(plist-put o :qa-backstage-url (plist-get o :webchat-url))
			(plist-put o :qa-type "irc")
      (plist-put o :qa-link (format "<a href=\"%s\">%s</a>" (plist-get o :webchat-url) (plist-get o :qa-info))))
     ((string-match "Mumble" (plist-get o :q-and-a))
      (plist-put o :qa-info "Moderated via Mumble, ask questions via pad or IRC")
			(plist-put o :qa-type "mumble")
      (plist-put o :qa-link (format "<a href=\"%s\">%s</a>" (plist-get o :webchat-url) (plist-get o :qa-info))))
     ((string-match "pad" (plist-get o :q-and-a))
      (plist-put o :qa-info "Etherpad")
			(plist-put o :qa-url (plist-get o :pad-url))
			(plist-put o :qa-backstage-url (plist-get o :pad-url))
			(plist-put o :qa-type "pad")
      (plist-put o :qa-link (when (plist-get o :pad-url)
															(format "<a href=\"%s\">%s</a>"
																			(plist-get o :pad-url)
																			(plist-get o :qa-info)))))
     (t (plist-put o :qa-info "after the event")
				(plist-put o :qa-type "none")
        (plist-put o :qa-link "none")
				(plist-put o :qa-backstage-url (plist-get o :pad-url))))
    (plist-put o :recorded-intro
               (let ((filename
                      (expand-file-name (concat (plist-get o :slug) ".webm")
                                        (expand-file-name "intros" emacsconf-stream-asset-dir))))
                 (and (file-exists-p filename) filename)))
    o))

(defun emacsconf-search-talk-info (search &optional info)
  (setq info (or info (emacsconf-get-talk-info)))
  (or
   (seq-find (lambda (o) (string= (plist-get o :slug)
                                  (emacsconf-get-slug-from-string search)))
             info)
   (seq-find (lambda (o)
               (string-match
                search
                (format "%s - %s - %s - %s"
                        (plist-get o :slug)
                        (plist-get o :title)
                        (plist-get o :speakers)
                        (plist-get o :email))))
             info)))

(defun emacsconf-get-talk-info-for-subtree ()
	"Run `emacsconf-talk-info-functions' to extract the info for this entry."
  (seq-reduce (lambda (prev val) (save-excursion (save-restriction (funcall val prev))))
              emacsconf-talk-info-functions
              nil))

(defun emacsconf-sort-by-scheduled (a b)
  (let ((time-a (plist-get a :start-time))
        (time-b (plist-get b :start-time)))
    (cond
     ((null time-b) t)
     ((null time-a) nil)
     ((time-less-p time-a time-b) t)
     ((time-less-p time-b time-a) nil)
     (t (< (or (plist-get a :point) 0) (or (plist-get b :point) 0))))))

(defun emacsconf-get-talk-info ()
  (with-current-buffer (find-file-noselect emacsconf-org-file)
    (save-excursion
      (save-restriction
        (widen)
        (let (results)
          (org-map-entries
           (lambda ()
             (when (or (org-entry-get (point) "TIME")
                       (org-entry-get (point) "SLUG")
                       (org-entry-get (point) "INCLUDE_IN_INFO"))
               (setq results
                     (cons (emacsconf-get-talk-info-for-subtree)
                           results)))))
          (nreverse results))))))

(defun emacsconf-filter-talks (list)
  "Return only talk info in LIST."
  (seq-filter
   (lambda (talk) (eq (plist-get talk :type) 'talk))
   list))

(defun emacsconf-collect-field-for-status (status field &optional info)
  (seq-map
   (lambda (o)
     (plist-get o field))
   (seq-filter
    (lambda (o)
      (if (listp status)
          (member (plist-get o :status) status)
        (string= status (plist-get o :status))))
    (emacsconf-filter-talks (or info (emacsconf-get-talk-info))))))


(defun emacsconf-get-talk-info-from-file (&optional filename)
  (with-temp-buffer
    (insert-file-contents (or filename "conf.org"))
    (org-mode)
    (org-show-all)
    (goto-char (point-min))
    (goto-char (org-find-property "ID" "talks"))
    (emacsconf-get-talk-info 'wiki)))

(defun emacsconf-include-next-talks (info number)
  (let* ((info (emacsconf-publish-prepare-for-display info))
         (cur-list info))
    ;; add links to the next talks
    (while cur-list
      (plist-put (pop cur-list) :next-talks (seq-take cur-list number)))
    info))

(defun emacsconf-previous-talk (talk &optional info)
	(setq info (or info (emacsconf-publish-prepare-for-display (emacsconf-get-talk-info))))
	(let* ((pos (seq-position info talk))
				 (prev (and pos
										(> pos 0)
										(elt info (1- pos)))))
		(and prev
				 (string= (format-time-string "%Y-%m-%d" (plist-get prev :start-time) emacsconf-timezone)
									(format-time-string "%Y-%m-%d" (plist-get talk :start-time) emacsconf-timezone))
				 prev)))
;; (emacsconf-previous-talk (emacsconf-resolve-talk "lspbridge"))

(defun emacsconf-resolve-talk (talk &optional info)
  "Return the plist for TALK."
  (if (stringp talk) (emacsconf-find-talk-info talk info) talk))

(defun emacsconf-find-talk-info (filter &optional info)
  (setq info (or info (emacsconf-filter-talks (emacsconf-get-talk-info))))
  (when (stringp filter) (setq filter (list filter)))
  (or (seq-find (lambda (o) (string= (plist-get o :slug) (car filter))) info)
      (seq-find (lambda (o)
                  (let ((case-fold-search t)
                        (all (mapconcat (lambda (f) (plist-get o f)) '(:title :speakers :slug) " ")))
                    (null (seq-contains-p
                           (mapcar (lambda (condition) (string-match condition all)) filter)
                           nil))))
                info)))

(defun emacsconf-combine-plist (list-of-talks separator)
  (let (result entry)
    (while list-of-talks
      (setq entry (car list-of-talks))
      (while entry
        (unless (equal (plist-get result (car entry))
                         (cadr entry))
          (setq result
                (plist-put result
                           (car entry)
                           (cons (cadr entry)
                                 (or (plist-get result (car entry)))))))
        (setq entry (cddr entry)))
      (setq list-of-talks (cdr list-of-talks)))
    result))

(defun emacsconf-goto-talk-id (id)
  (goto-char (org-find-property "TALK_ID" id)))

(defun emacsconf-goto-slug (slug)
  (goto-char (org-find-property "SLUG" id)))

(defun emacsconf-talk-markdown-from-wiki (slug)
  "Return the markdown from SLUG."
  (when (file-exists-p (expand-file-name (format "%s/talks/%s.md" emacsconf-year slug) emacsconf-directory))
    (with-temp-buffer
      (insert-file-contents (expand-file-name (format "%s/talks/%s.md" emacsconf-year slug) emacsconf-directory))
      (goto-char (point-min))
      (while (re-search-forward "<!--" nil t)
        (let ((start (match-beginning 0)))
          (when (re-search-forward "-->" nil t)
            (delete-region start (match-end 0)))))
      (goto-char (point-min))
      (while (re-search-forward "\\[\\[![^]]+\\]\\]" nil t)
        (replace-match ""))
      (string-trim (buffer-string)))))

(defun emacsconf-replace-plist-in-string (attrs string)
  "Replace ${keyword} from ATTRS in STRING."
  (let ((a attrs) name val)
    (while a
      (setq name (pop a) val (pop a))
      (when (stringp val)
        (setq string
              (replace-regexp-in-string
							 (regexp-quote
								(concat "${" (substring (symbol-name name) 1) "}"))
               (or val "")
               string t t))))
    string))

(defun emacsconf-public-talks (info)
  (seq-filter (lambda (f) (plist-get f :public)) info))

(defun emacsconf-format-short-time (string &optional omit-end-time)
  (if (stringp string) (setq string (org-timestamp-from-string string)))
  (downcase
   (concat (format-time-string "~%l:%M%p"
                               (org-timestamp-to-time
                                (org-timestamp-split-range
                                 string)))
           (if omit-end-time ""
             (format-time-string "-%l:%M%p"
                                 (org-timestamp-to-time
                                  (org-timestamp-split-range
                                   string t)))))))

(defvar emacsconf-focus 'time "'time or 'status")

;;; Embark
(defun emacsconf-embark-finder ()
	"Identify when we're on a talk subtree."
  (cond
	 ((and (derived-mode-p 'org-mode)
				 (let ((context (org-element-context)))
					 (and (org-element-type-p context 'link)
								(string= (org-element-property :type context) "emacsconf"))))
		(cons 'emacsconf (org-element-property :path (org-element-context))))
	 ((and (derived-mode-p 'org-mode)
				 (org-entry-get-with-inheritance "SLUG"))
		(cons 'emacsconf (org-entry-get-with-inheritance "SLUG")))
	 ((emacsconf-resolve-talk (symbol-name (symbol-at-point)))
		(cons 'emacsconf (symbol-name (symbol-at-point))))))

(defun emacsconf-insert-talk-title (search)
	"Insert the talk title matching SEARCH."
  (interactive (list (emacsconf-complete-talk)))
  (insert (plist-get (emacsconf-search-talk-info search) :title)))

(defun emacsconf-insert-talk-email (search)
	"Insert the talk email matching SEARCH."
  (interactive (list (emacsconf-complete-talk)))
  (insert (plist-get (emacsconf-search-talk-info search) :email)))

(defun emacsconf-backstage-url (&optional base-url)
	"Return or insert backstage URL with credentials."
	(setq base-url (or base-url (concat emacsconf-media-base-url emacsconf-year "/backstage/")))
	(interactive)
	(let ((url (format
							"https://%s:%s@%s"
							emacsconf-backstage-user
							emacsconf-backstage-password
							(replace-regexp-in-string "https://" "" base-url)
							emacsconf-year)))
		(when (called-interactively-p 'any)
			(insert url))
		url))

(defun emacsconf-message-talk-info (talk prop)
	"Briefly display info for TALK"
	(interactive
	 (list (emacsconf-complete-talk-info)
				 (completing-read "Property: " '("pronouns" "availability"))))
	(message "%s" (plist-get (emacsconf-resolve-talk talk) (intern (concat ":" (downcase prop))))))

(with-eval-after-load 'embark
  (add-to-list 'embark-target-finders 'emacsconf-embark-finder)
  (defvar-keymap embark-emacsconf-actions
    :doc "Keymap for emacsconf-related things"
    "a" #'emacsconf-announce
		"i e" #'emacsconf-insert-talk-email
		"i t" #'emacsconf-insert-talk-title
		"I" #'emacsconf-message-talk-info
    "c" #'emacsconf-find-captions-from-slug
    "d" #'emacsconf-find-caption-directives-from-slug
    "p" #'emacsconf-set-property-from-slug
    "w" #'emacsconf-edit-wiki-page
    "s" #'emacsconf-set-start-time-for-slug
    "W" #'emacsconf-browse-wiki-page
    "u" #'emacsconf-update-talk
    "t" #'emacsconf-insert-talk-title
    "m" #'emacsconf-mail-speaker-from-slug
		"l" #'emacsconf-add-to-talk-logbook
    "M" #'emacsconf-mail-insert-info
    "n" #'emacsconf-mail-notmuch-search-for-talk
    "f" #'org-forward-heading-same-level
    "b" #'org-backward-heading-same-level
    "RET" #'emacsconf-go-to-talk)
  (add-to-list 'embark-keymap-alist '(emacsconf . embark-emacsconf-actions)))

;;; Status updates

(defun emacsconf-status-update ()
  (interactive)
  (let ((emacsconf-info (emacsconf-get-talk-info)))
    (kill-new
     (format "%d captioned (%d minutes), %d received and waiting to be captioned (%d minutes)"
             (length (emacsconf-collect-field-for-status "CAPTIONED" :title))
             (apply '+ (seq-map 'string-to-number (conf-collect-field-for-status "CAPTIONED" :time)))
             (length (emacsconf-collect-field-for-status "PREREC_RECEIVED" :title))
             (apply '+ (seq-map 'string-to-number (conf-collect-field-for-status "PREREC_RECEIVED" :time)))))))

;; Timezones
(defvar emacsconf-timezone-offset
  (format-time-string "%z" (date-to-time emacsconf-date) emacsconf-timezone)
  "Timezone offset for `emacsconf-timezone' on `emacsconf-date'.")

(defun emacsconf-timezone-string (o tz &optional format)
	(when (and (listp o) (plist-get o :scheduled)) (setq o (plist-get o :scheduled)))
  (let* ((start (org-timestamp-to-time (org-timestamp-split-range (org-timestamp-from-string o))))
         (end (org-timestamp-to-time (org-timestamp-split-range (org-timestamp-from-string o) t))))
    (if (string= tz "UTC")
        (format "%s - %s "
                (format-time-string (or format "%A, %b %-e %Y, ~%-l:%M %p")
                                    start tz)
                (format-time-string "%-l:%M %p %Z"
                                    end tz))
      (format "%s - %s (%s)"
              (format-time-string (or format "%A, %b %-e %Y, ~%-l:%M %p")
                                  start tz)
              (format-time-string "%-l:%M %p %Z"
                                  end tz)
              tz))))

(defun emacsconf-timezone-strings (o &optional timezones format)
  (mapcar (lambda (tz) (emacsconf-timezone-string o tz format)) (or timezones emacsconf-timezones)))

(defun emacsconf-timezone-strings-combined (time timezones &optional format)
	"Show TIME in TIMEZONES.
If TIMEZONES is a string, split it by commas."
	(let* ((format (or format "%b %-d %-l:%M %p"))
				 (base-time (format-time-string format time emacsconf-timezone))
				 (timezones
					(seq-remove (lambda (s) (string= emacsconf-timezone s))
											(if (stringp timezones)
													(split-string timezones " *, *" t)
												timezones))))
		(concat base-time " in " (emacsconf-schedule-rename-etc-timezone emacsconf-timezone)
						(if timezones
								(concat
								 " (which is "
								 (mapconcat
									(lambda (tz)
										(let ((translated-time (format-time-string format time tz)))
											(if (string= translated-time base-time)
													(concat "the same in " (emacsconf-schedule-rename-etc-timezone tz))
												(concat translated-time " in " (emacsconf-schedule-rename-etc-timezone tz)))))
									timezones
									"; ")
								 ")")
							""))))

;;;###autoload
(defun emacsconf-convert-from-timezone (timezone time)
  (interactive (list (progn
											 (require 'tzc)
											 (if (and (derived-mode-p 'org-mode)
																(org-entry-get (point) "TIMEZONE"))
													 (completing-read (format "From zone (%s): "
																										(org-entry-get (point) "TIMEZONE"))
																						tzc-time-zones nil nil nil nil
																						(org-entry-get (point) "TIMEZONE"))
												 (completing-read "From zone: " tzc-time-zones nil t)))
                     (read-string "Time: ")))
  (let* ((from-offset (format-time-string "%z" (date-to-time emacsconf-date) timezone))
         (time
          (date-to-time
           (concat emacsconf-date "T" (string-pad time 5 ?0 t)  ":00.000"
                   from-offset))))
    (message "%s = %s"
             (format-time-string
              "%b %d %H:%M %z"
              time
              timezone)
             (format-time-string
              "%b %d %H:%M %z"
              time
              emacsconf-timezone))))

(defun emacsconf-convert-to-timezone (timezone time)
  (interactive (list (progn
											 (require 'tzc)
											 (if (and (derived-mode-p 'org-mode)
																(org-entry-get (point) "TIMEZONE"))
													 (completing-read (format "To zone (%s): "
																										(org-entry-get (point) "TIMEZONE"))
																						tzc-time-zones nil nil nil nil
																						(org-entry-get (point) "TIMEZONE"))
												 (completing-read "To zone: " tzc-time-zones nil t)))
                     (read-string "Time: ")))
  (let* ((time
          (date-to-time
           (concat emacsconf-date "T" (string-pad time 5 ?0 t)  ":00.000"
                   emacsconf-timezone-offset))))
    (message "%s = %s"
             (format-time-string
              "%b %d %H:%M %z"
              time
              emacsconf-timezone)
             (format-time-string
              "%b %d %H:%M %z"
              time
              timezone))))

(defun emacsconf-timezone-set (timezone)
	"Set the timezone for the current Org entry."
	(interactive
	 (list
		(progn
			(require 'tzc)
			(completing-read "Timezone: " tzc-time-zones))))
	(org-entry-put (point) "TIMEZONE" timezone))

;;; Etherpad
(defvar emacsconf-review-comments-heading "Comments")
(defun emacsconf-import-comments-from-etherpad-text (filename)
  (interactive "FEtherpad text export: ")
  (with-temp-buffer
    (insert-file-contents filename)
    (goto-char (point-min))
    (while (re-search-forward "^[\t ]+Comments for \\([^:]+\\)" nil t)
      (let ((slug (match-string 1))
            comments)
        (forward-line 1)
        (setq comments
              (split-string
                (replace-regexp-in-string
                "\t\t\\*[ \t]*"
                ""
                (buffer-substring-no-properties
                 (point)
                 (if (re-search-forward "^[^\t]" nil t)
                     (match-beginning 0)
                   (point-max))))
               "\n"))
        (save-window-excursion
          (emacsconf-with-talk-heading slug
            ;; Do we already have a heading for comments?
            (if (re-search-forward (concat "^\\(\\*+\\) +" emacsconf-review-comments-heading)
                                   (save-excursion (org-end-of-subtree)) t)
                (org-end-of-meta-data)
              (org-end-of-subtree)
              (org-insert-heading-after-current)
              (insert emacsconf-review-comments-heading "\n"))
            ;; Are these comments already included?
            (save-restriction
              (org-narrow-to-subtree)
              (mapc (lambda (o)
                      (goto-char (point-min))
                      (unless (re-search-forward (regexp-quote o) nil t)
                        (goto-char (point-max))
                        (unless (bolp) (insert "\n"))
                        (insert "- " o "\n")))
                    comments))))))))

;;; Validation

(defun emacsconf-validate-all-talks-have-comments-for-speakers ()
  (interactive)
  (emacsconf-for-each-talk
    (unless (re-search-forward "^\\(- \\)?For \\(the \\)?[^ ]+ speaker" (save-excursion (org-end-of-subtree) (point)) t)
      (error "Could not find comment for %s" (org-entry-get (point) "SLUG"))))
  nil)

(defun emacsconf-validate-all-talks-have-field (field)
  (emacsconf-for-each-talk
    (when (string= (or (org-entry-get (point) field) "") "")
      (error "%s is missing %s" (org-entry-get (point) "SLUG") field)))
  nil)



(defvar emacsconf-time-constraints
  '(("saturday closing remarks" "16:30" "17:30")
    ("sunday closing remarks" "16:30" "17:30")))

(defun emacsconf-validate-no-overlaps (&optional info)
  (let (results))
  (while (cdr info)
    (when (and (plist-get (car info) :slug)
               (time-less-p (plist-get (cadr info) :start-time) (plist-get (car info) :end-time)))
      (setq results (cons "%s overlaps with %s (ends %s, starts %s)"
                          (or (plist-get (car info) :slug)
                              (plist-get (car info) :title))
                          (or (plist-get (cadr info) :slug)
                              (plist-get (cadr info) :title))
                          (format-time-string "%H:%M" (plist-get (car info) :end-time))
                          (format-time-string "%H:%M" (plist-get (cadr info) :start-time)))))
    (setq info (cdr info))))

(defun emacsconf-active-talks (list)
  "Remove CANCELLED talks from the list."
  (seq-remove (lambda (o) (string= (plist-get o :status) "CANCELLED")) list))

(defun emacsconf-validate-talk-subtree ()
  "Report an error if required properties are missing."
  (interactive)
  (let* ((props (org-entry-properties))
         (missing (seq-remove
                  (lambda (o) (assoc-default (symbol-name o) props))
                  '(CUSTOM_ID SLUG NAME NAME_SHORT EMAIL AVAILABILITY Q_AND_A TRACK MAX_TIME))))
    (when missing
      (if (called-interactively-p 'any)
          (message "Missing %s"  (mapconcat #'symbol-name missing ", "))
        (format "Missing %s"  (mapconcat #'symbol-name missing ", "))))))

(defun emacsconf-ansible-load-vars (file)
  (interactive (list (read-file-name "File: " emacsconf-ansible-directory)))
  (with-temp-buffer
    (insert-file-contents file)
    (let ((vars
           (yaml-parse-string (buffer-string))))
      (mapc (lambda (var)
              (set (car var) (gethash (cdr var) vars))
              )
            '((emacsconf-pad-api-key . etherpad_api_key)
              (emacsconf-pad-base . etherpad_url)
              (emacsconf-backstage-password . emacsconf_backstage_password))))))
;; (emacsconf-ansible-load-vars (expand-file-name "prod-vars.yml" emacsconf-ansible-directory))
;;; Tracks
(defvar emacsconf-tracks
  `((:name "General" :color "peachpuff" :id "gen" :channel "emacsconf-gen"
           :watch ,(format "https://live.emacsconf.org/%s/watch/gen/" emacsconf-year)
				   :tramp "/ssh:emacsconf-gen@res.emacsconf.org#46668:"
           :webchat-url "https://chat.emacsconf.org/?join=emacsconf,emacsconf-org,emacsconf-accessible,emacsconf-dev,emacsconf-gen"
           :stream ,(concat emacsconf-stream-base "gen.webm")
           :480p ,(concat emacsconf-stream-base "gen-480p.webm")
					 ;; :youtube-url "https://www.youtube.com/watch?v=UEJ88c7MJq0"
					 ;; :youtube-studio-url "https://studio.youtube.com/video/UEJ88c7MJq0/livestreaming"
					 ;; :toobnix-url "https://toobnix.org/w/7t9X8eXuSby8YpyEKTb4aj"
           :start "09:00" :end "17:00"
					 :uid 2002
           :vnc-display ":5"
           :vnc-port "5905"
					 :autopilot crontab
           :status "online")
   (:name "Development" :color "skyblue" :id "dev" :channel "emacsconf-dev"
          :watch  ,(format "https://live.emacsconf.org/%s/watch/dev/" emacsconf-year)
				  :webchat-url "https://chat.emacsconf.org/?join=emacsconf,emacsconf-org,emacsconf-accessible,emacsconf-gen,emacsconf-dev"
          :tramp "/ssh:emacsconf-dev@res.emacsconf.org#46668:"
					;; :toobnix-url "https://toobnix.org/w/w6K77y3bNMo8xsNuqQeCcD"
					;; :youtube-url "https://www.youtube.com/watch?v=PMaoF-xa1b4"
					;; :youtube-studio-url "https://studio.youtube.com/video/PMaoF-xa1b4/livestreaming"
					:stream ,(concat emacsconf-stream-base "dev.webm")
          :480p ,(concat emacsconf-stream-base "dev-480p.webm")
					:uid 2003
          :start "10:00" :end "17:00"
          :vnc-display ":6"
          :vnc-port "5906"
					:autopilot crontab
          :status "online")))

(defun emacsconf-get-track (name)
	"Get the track for NAME.
NAME could be a track name, a talk name, or a list."
  (when (and (listp name) (plist-get name :track))
		(setq name (plist-get name :track)))
	(if (stringp name)
			(or
			 (seq-find (lambda (track) (or (string= name (plist-get track :name))
																		 (string= name (plist-get track :id))))
								 emacsconf-tracks)
			 (let ((talk (emacsconf-resolve-talk name)))
				 (seq-find (lambda (track) (or (string= (plist-get talk :track) (plist-get track :name))
																			 (string= (plist-get talk :track) (plist-get track :id))))
									 emacsconf-tracks))
			 name)
		name))

(defun emacsconf-by-track (info)
  (mapcar (lambda (track)
            (seq-filter
             (lambda (talk)
               (string= (plist-get talk :track) (plist-get track :name)))
             info))
          emacsconf-tracks))

(defun emacsconf-complete-track (&optional prompt tracks)
  (emacsconf-get-track
	 (completing-read
		(or prompt "Track: ")
		(mapcar (lambda (o) (plist-get o :name)) (or tracks emacsconf-tracks)))))

(defun emacsconf-by-day (info)
  (seq-group-by (lambda (o)
                  (format-time-string "%Y-%m-%d" (plist-get o :start-time) emacsconf-timezone))
                (sort (seq-filter (lambda (o)
                                    (or (plist-get o :slug)
                                        (plist-get o :include-in-info)))
                                  info)
                      #'emacsconf-sort-by-scheduled)))

(defun emacsconf-filter-talks-by-track (track info)
  (when (stringp track) (setq track (emacsconf-get-track track)))
  (seq-filter (lambda (o) (string= (plist-get o :track) (plist-get track :name))) info))

(defun emacsconf-filter-talks-by-slugs (slugs &optional info)
	(setq info (or info (emacsconf-get-talk-info)))
	(if slugs
			(seq-filter (lambda (o)
										(member (plist-get o :slug)
														slugs))
									info)
		info))

(defun emacsconf-filter-talks-by-logbook (text &optional info)
	(setq info (or info (emacsconf-get-talk-info)))
	(if text
			(seq-remove (lambda (o)
										(and (plist-get o :logbook)
												 (string-match (regexp-quote text) (plist-get o :logbook))))
									info)
		info))

(defvar emacsconf-shifts
	(list (list :id "sat-am-gen" :track "General" :start "2023-12-02T08:00:00-0500" :end "2023-12-02T12:00:00-0500" :host "zaeph" :streamer "sachac" :checkin "FlowyCoder" :coord "sachac") (list :id "sat-pm-gen" :track "General" :start "2023-12-02T13:00:00-0500" :end "2023-12-02T18:00:00-0500" :host "zaph" :streamer "sachac" :checkin "FlowyCoder" :coord "sachac") (list :id "sat-am-dev" :track "Development" :start "2023-12-02T08:00:00-0500" :end "2023-12-02T12:00:00-0500" :host "bandali" :streamer "sachac" :checkin "FlowyCoder" :coord "sachac") (list :id "sat-pm-dev" :track "Development" :start "2023-12-02T13:00:00-0500" :end "2023-12-02T18:00:00-0500" :host "bandali" :streamer "sachac" :checkin "FlowyCoder" :coord "sachac") (list :id "sun-am-gen" :track "General" :start "2023-12-03T08:00:00-0500" :end "2023-12-03T12:00:00-0500" :host "zaeph" :streamer "sachac" :checkin "FlowyCoder" :coord "sachac") (list :id "sun-pm-gen" :track "General" :start "2023-12-03T13:00:00-0500" :end "2023-12-03T18:00:00-0500" :host "zaeph" :streamer "sachac" :checkin "FlowyCoder" :coord "sachac") (list :id "sun-am-dev" :track "Development" :start "2023-12-03T08:00:00-0500" :end "2023-12-03T12:00:00-0500" :host "bandali" :streamer "sachac" :checkin "FlowyCoder" :coord "sachac") (list :id "sun-pm-dev" :track "Development" :start "2023-12-03T13:00:00-0500" :end "2023-12-03T18:00:00-0500" :host "bandali" :streamer "sachac" :checkin "FlowyCoder" :coord "sachac")))

(defun emacsconf-filter-talks-by-time (start-time end-time info)
  "Return talks that are between START-TIME and END-TIME (inclusive) in INFO."
  (when (stringp start-time) (setq start-time (date-to-time start-time)))
  (when (stringp end-time) (setq end-time (date-to-time end-time)))
  (seq-filter (lambda (o)
                (and (plist-get o :start-time)
                     (time-less-p (plist-get o :start-time) end-time)
                     (time-less-p start-time (plist-get o :end-time))))
              info))

(defun emacsconf-get-shift (time)
  "Return the shift that TIME is in."
  (unless (stringp time)
    (setq time (format-time-string "%Y-%m-%dT%H:%M:%S%z" time emacsconf-timezone)))
  (seq-find (lambda (shift)
              (and (not (string> time (plist-get shift :end)))
                   (not (string> (plist-get shift :start) time))))
            emacsconf-shifts))

(defun emacsconf-filter-talks-by-shift (time track info)
  "Return a list of talks that are in the shift specified by TIME.
Filter by TRACK if given.  Use INFO as the list of talks."
  (let* ((shift (emacsconf-get-shift time))
         (list (emacsconf-filter-talks-by-time (plist-get shift :start) (plist-get shift :end) info)))
    (if track
        (emacsconf-filter-talks-by-track track info)
      list)))

(defun emacsconf-talk-all-done-p (talk)
  (member (plist-get talk :status) (split-string "TO_ARCHIVE TO_EXTRACT TO_FOLLOW_UP DONE")))

(defun emacsconf-bbb-status (talk)
  (let ((states
         '((open . "OPEN_Q UNSTREAMED_Q")
           (before . "TODO TO_REVIEW TO_ACCEPT WAITING_FOR_PREREC TO_PROCESS PROCESSING TO_AUTOCAP TO_ASSIGN TO_CAPTION TO_CHECK TO_STREAM PLAYING CLOSED_Q")
           (after . "TO_ARCHIVE TO_EXTRACT TO_REVIEW_QA TO_INDEX_QA TO_CAPTION_QA TO_FOLLOW_UP DONE")
           (cancelled . "CANCELLED"))))
    (if (string-match "live" (or (plist-get talk :q-and-a) ""))
        (or (car (seq-find (lambda (state)
                             (member (plist-get talk :status) (split-string (cdr state))))
                           states))
            (throw 'error "Unknown talk BBB state"))
      'irc)))

(defun emacsconf-captions-edited-p (filename)
  "Return non-nil if FILENAME has been edited and is okay for inclusion."
  (and
	 filename
	 (file-exists-p filename)
   (with-temp-buffer
     (insert-file-contents filename)
     (goto-char (point-min))
     (re-search-forward "captioned by" (line-end-position) t))))

(defvar emacsconf-bbb-base-url "https://bbb.emacsverse.org/" "Include trailing slash.")
(defun emacsconf-bbb-room-title-list (&optional info)
  (delq nil
        (mapcar
         (lambda (o)
           (when (car o)
             (concat "ec" (substring emacsconf-year 2)
                     "-" (plist-get (emacsconf-get-shift (plist-get (cadr o) :start-time)) :id)
                     "-" (plist-get (emacsconf-get-track (plist-get (cadr o) :track)) :id)
                     " " (car o)
                     " ("
                     (mapconcat (lambda (talk) (plist-get talk :slug)) (cdr o) ", ")
                     ")")))
         (seq-group-by (lambda (o) (plist-get o :speakers))
                       (or info (emacsconf-active-talks (emacsconf-filter-talks (emacsconf-get-talk-info))))))))

(defun emacsconf-surround (before text after &optional alternative)
  "Concat BEFORE, TEXT, and AFTER if TEXT is specified, or return ALTERNATIVE."
  (if (and text (not (string= text "")))
      (concat (or before "") text (or after ""))
    alternative))

;;; Volunteer management
(defun emacsconf-get-volunteer-info ()
  (with-current-buffer (find-file-noselect emacsconf-org-file)
    (org-map-entries (lambda () (org-entry-properties))
                     "volunteer+EMAIL={.}")))

(defun emacsconf-volunteer-emails-for-completion (&optional info)
  (mapcar (lambda (o)
            (emacsconf-surround
             (if (assoc-default "ITEM" o)
                 (concat (assoc-default "ITEM" o) " <")
               "<")
             (assoc-default "EMAIL" o)
             ">" ""))
          (or info (emacsconf-get-volunteer-info))))

(defun emacsconf-volunteer-insert-email (&optional info)
	(interactive)
	(insert (completing-read
					 (mapcar
						(lambda (o)
							(emacsconf-surround
							 (if (assoc-default "ITEM" o)
									 (concat (assoc-default "ITEM" o) " <")
								 "<")
							 (assoc-default "EMAIL" o)
							 ">" ""))
						(or info (emacsconf-get-volunteer-info))))))
(defun emacsconf-complete-volunteer (&optional info)
  (setq info (or info (emacsconf-get-volunteer-info)))
  (let* ((choices
          (emacsconf-volunteer-emails-for-completion))
         (choice (completing-read
                  "Volunteer: "
                  (lambda (string predicate action)
                    (if (eq action 'metadata)
                        '(metadata (category . volunteer))
                      (complete-with-action action choices string predicate))))))
    (elt info (seq-position choices choice))))

;;; Reflowing
(defun emacsconf-reflow ()
  "Help reflow text files."
  (interactive)
  (let (input last-input (case-fold-search t))
    (while (not (string= "" (setq input (read-string "Word: "))))
      (when (string= input "!")
        (delete-backward-char 1)
        (insert " ")
        (end-of-line)
        (re-search-forward (regexp-quote last-input) nil t)
        (setq input last-input))
      (if (string= input "'")
          (progn
            (end-of-line)
            (unless (looking-back " ")
              (insert " "))
            (delete-char 1))
        (forward-word)
        (cond
         ((string= input ",")
          (re-search-forward ", " nil t)
          (goto-char (match-end 0)))
         ((string= input ".")
          (re-search-forward "\\. " nil t)
          (goto-char (match-end 0)))
         (t
          (re-search-forward (concat "\\<" (regexp-quote input)) nil t)
          (goto-char (match-beginning 0))))
        (insert "\n")
        (when (< (+ (- (line-end-position) (point))
										(save-excursion (- (line-end-position) (line-beginning-position)))
										1) fill-column)
          (save-excursion
            (goto-char (line-end-position))
            (insert " ")
            (delete-char 1)))
        (setq last-input input)
        (recenter)
        (undo-boundary)))))

(defmacro emacsconf-with-todo-hooks (&rest body)
  "Run BODY with the Emacsconf todo hooks."
  `(with-current-buffer (find-file-noselect emacsconf-org-file)
     (let ((org-after-todo-state-change-hook '(emacsconf-org-after-todo-state-change)))
       ,@body)))

(defun emacsconf-add-org-after-todo-state-change-hook ()
  "Add FUNC to `org-after-todo-stage-change-hook'."
  (interactive)
  (with-current-buffer (find-buffer-visiting emacsconf-org-file)
    (add-hook 'org-after-todo-state-change-hook #'emacsconf-org-after-todo-state-change nil t)))

(defun emacsconf-remove-org-after-todo-state-change-hook ()
  "Remove FUNC from `org-after-todo-stage-change-hook'."
  (interactive)
  (with-current-buffer (find-buffer-visiting emacsconf-org-file)
    (remove-hook 'org-after-todo-state-change-hook
                 #'emacsconf-org-after-todo-state-change  t)))

(defvar emacsconf-todo-hooks
  '(emacsconf-stream-play-talk-on-change
		emacsconf-stream-open-qa-windows-on-change
    emacsconf-erc-announce-on-change ;; announce via ERC
    emacsconf-publish-bbb-redirect
    emacsconf-stream-update-talk-info-on-change
    emacsconf-publish-media-files-on-change
		emacsconf-publish-update-talk
    emacsconf-publish-backstage-org-on-state-change ;; update the backstage index
    )
  "Functions to run when the todo state changes.
They will be called with TALK.")

(defun emacsconf-org-after-todo-state-change ()
  "Run all the hooks in `emacsconf-todo-hooks'.
If an `emacsconf-todo-hooks' entry is a list, run it only for the
tracks with the ID in the cdr of that list."
  (let* ((talk (emacsconf-get-talk-info-for-subtree))
         (track (emacsconf-get-track (plist-get talk :track))))
    (mapc
     (lambda (hook-entry)
       (cond
        ((symbolp hook-entry) (funcall hook-entry talk))
        ((member (plist-get track :id) (cdr hook-entry))
         (funcall (car hook-entry) talk))))
     emacsconf-todo-hooks)))

(defun emacsconf-broadcast (message)
  (interactive "MMessage: ")
  (when (not (string= (or message "") ""))
    (erc-cmd-BROADCAST message))
  (emacsconf-stream-broadcast message))

(defun emacsconf-agenda ()
  (interactive)
  (let ((org-agenda-files (list emacsconf-org-file)))
    (org-agenda-list nil emacsconf-date 2)))

(defun emacsconf-track-agenda (track)
  (interactive (list (emacsconf-complete-track)))
  (when (stringp track) (setq track (emacsconf-get-track track)))
  (let ((org-agenda-files (list emacsconf-org-file))
        (org-agenda-category-filter-preset (list (concat "+" (plist-get track :id)))))
    (org-agenda-list nil emacsconf-date 2)))

(defun emacsconf-update-talk-status-with-hooks (slug from-states to-state)
	(interactive (list (emacsconf-complete-talk) "." (completing-read "To: " (mapcar 'car emacsconf-status-types))))
	(emacsconf-with-todo-hooks
	 (emacsconf-update-talk-status slug from-states to-state)))

(defun emacsconf-update-talk-status (slug from-states to-state)
  (interactive (list (emacsconf-complete-talk) "." (completing-read "To: " (mapcar 'car emacsconf-status-types))))
  (emacsconf-with-talk-heading slug
    (when (or (null from-states)
	      (string-match from-states (org-entry-get (point) "TODO")))
      (org-todo to-state)
      (save-buffer))))

;; copied from org-ascii--indent-string
(defun emacsconf-indent-string (s width)
  "Indent S by WIDTH spaces."
  (replace-regexp-in-string "\\(^\\)[ \t]*\\S-" (make-string width ?\s) s nil nil 1))

(defun emacsconf-add-to-logbook (note)
  "Add NOTE as a logbook entry for the current subtree."
  (move-marker org-log-note-return-to (point))
  (move-marker org-log-note-marker (point))
  (with-temp-buffer
    (insert note)
    (let ((org-log-note-purpose 'note))
      (org-store-log-note))))

(defun emacsconf-add-to-talk-logbook (talk note)
  "Add NOTE as a logbook entry for TALK."
  (interactive (list (emacsconf-complete-talk) (read-string "Note: ")))
  (save-excursion
    (emacsconf-with-talk-heading talk
      (emacsconf-add-to-logbook note))))

(defun emacsconf-reload ()
  "Reload the emacsconf-el modules."
  (interactive)
  (mapc #'load-library '("emacsconf" "emacsconf-erc" "emacsconf-publish" "emacsconf-stream" "emacsconf-pad")))

(defun emacsconf-find-talk-file-in-cache (talk filename)
  (interactive (let ((talk (emacsconf-complete-talk-info)))
                 (list
                  talk
                  (completing-read "File: " (directory-files emacsconf-cache-dir t (plist-get talk :file-prefix))))))
  (find-file filename))

(defun emacsconf-cache-find-file (filename)
  (interactive (list (read-file-name "File: " (expand-file-name "./" emacsconf-cache-dir) nil t)))
  (find-file (expand-file-name filename emacsconf-cache-dir)))

(defun emacsconf-format-seconds (seconds)
	(concat (format-seconds "%.2h:%z%.2m:%.2s" (floor seconds))
					"." (format "%03d" (% (floor (* 1000 seconds)) 1000))))

(defun emacsconf-insert-time-for-speaker (talk)
	(interactive (list (emacsconf-complete-talk-info)))
	(insert
	 (format-time-string "%-I:%M %P %Z" (plist-get talk :start-time) emacsconf-timezone)
	 " (" emacsconf-timezone ")"
	 (if (string= (format-time-string "%z" (plist-get talk :start-time) (plist-get talk :timezone))
								emacsconf-timezone-offset)
			 ""
		 (concat
			" which should be the same as "
			(format-time-string "%-I:%M %P %Z" (plist-get talk :start-time) (plist-get talk :timezone))
			" in "
			(plist-get talk :timezone)))))

(defun emacsconf-collect-prop (prop list)
	(mapcar (lambda (o) (plist-get o prop)) list))

(defun emacsconf-talk-file (talk suffix &optional always source)
	(setq talk (emacsconf-resolve-talk talk))
	(let ((wiki-filename
				 (expand-file-name (concat (plist-get talk :file-prefix) suffix)
													 (expand-file-name "captions"
																						 (expand-file-name (plist-get talk :year)
																															 emacsconf-directory))))
				(cache-filename
				 (expand-file-name (concat (plist-get talk :file-prefix) suffix)
													 emacsconf-cache-dir)))
		(cond
		 (always cache-filename)
		 ((and (file-exists-p wiki-filename) (not (eq source 'cache))) wiki-filename)
		 ((and (file-exists-p cache-filename) (not (eq source 'wiki-captions))) cache-filename))))

(with-eval-after-load 'org
	(defun emacsconf-el-complete ()
		"Complete a file from the Emacsconf Elisp library."
		(concat "emacsconf-el:"
						(file-name-nondirectory
						 (read-file-name
							"File: "
							(file-name-directory (locate-library "emacsconf.el"))))))
	(defun emacsconf-el-open (link _)
		"Visit a file from the Emacsconf Elisp library."
		(find-file
		 (expand-file-name
			link
			(file-name-directory (locate-library "emacsconf.el")))))

	(defun emacsconf-el-export (link description format _)
		"Export link to emacsconf-el file."
		(format "<a href=\"https://git.emacsconf.org/emacsconf-el/tree/%s\">%s</a>"
						(file-name-nondirectory link)
						(or description link)))

	(org-link-set-parameters
	 "emacsconf-el"
	 :complete #'emacsconf-el-complete
	 :export #'emacsconf-el-export
	 :follow #'emacsconf-el-open)

	(defun emacsconf-ansible-complete ()
		"Complete a file from the Emacsconf Elisp library."
		(concat "emacsconf-ansible:"
						(completing-read
						 "File: "
						 (projectile-project-files
							emacsconf-ansible-directory))))

	(defun emacsconf-ansible-open (link _)
		"Visit a file from the Emacsconf Elisp library."
		(find-file
		 (expand-file-name
			link
			emacsconf-ansible-directory)))

	(defun emacsconf-ansible-export (link description format _)
		"Export link to emacsconf-el file."
		(format "<a href=\"https://git.emacsconf.org/emacsconf-ansible/tree/%s\">%s</a>"
						link (or description link)))

	(org-link-set-parameters
	 "emacsconf-ansible"
	 :complete #'emacsconf-ansible-complete
	 :export #'emacsconf-ansible-export
	 :follow #'emacsconf-ansible-open))

(defun emacsconf-end-of-week (date)
	"Useful for analyzing data. Assumes week ends Sunday."
	(let ((d (decode-time (date-to-time date))))
		(format-time-string "%Y-%m-%d"
												(encode-time
												 (decoded-time-add d (make-decoded-time :day (% (- 7 (decoded-time-weekday d)) 7)))))))

(defun emacsconf-count-submissions-by-week (&optional info cfp-deadline)
	"Count submissions in INFO by distance to CFP-DEADLINE."
	(setq cfp-deadline (or cfp-deadline emacsconf-cfp-deadline))
	(setq info (or info (emacsconf-get-talk-info)))
	(cons '("Weeks to CFP end date" "Count" "Hours")
				(mapcar (lambda (entry)
									(list (car entry)
												(length (cdr entry))
												(apply '+ (mapcar 'cdr (cdr entry)))))
								(seq-group-by
								 'car
								 (sort
									(seq-keep
									 (lambda (o)
										 (and (emacsconf-publish-talk-p o)
													(plist-get o :date-submitted)
													(cons (floor (/ (days-between (plist-get o :date-submitted) cfp-deadline)
																					7.0))
																(string-to-number
																 (or (plist-get o :video-duration)
																		 (plist-get o :time)
																		 "0")))))
									 info)
									(lambda (a b) (< (car a) (car b))))))))

(defun emacsconf-get-file-duration-ms (filename)
  "Return the duration of FILENAME in milliseconds."
  (* 1000
     (string-to-number
      (shell-command-to-string
       (concat "ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 "
               (shell-quote-argument (expand-file-name filename)))))))

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