passt/test/lib/video

#!/bin/sh
#
# SPDX-License-Identifier: AGPL-3.0-or-later
#
# PASST - Plug A Simple Socket Transport
#  for qemu/UNIX domain socket mode
#
# PASTA - Pack A Subtle Tap Abstraction
#  for network namespace/tap device mode
#
# test/lib/video - Session recording, JavaScript fragments with links
#
# Copyright (c) 2021-2022 Red Hat GmbH
# Author: Stefano Brivio <sbrivio@redhat.com>

FFMPEG_PID_FILE="$(mktemp)"
VIDEO_START_SECONDS=
VIDEO_NAME=

VIDEO_LINKS_TEMPLATE="document.write('"'
	Skip to:
'

VIDEO_LINKS_TEMPLATE_JS="
');

var video___VIDEO_NAME__links = [
"

VIDEO_LINKS_TEMPLATE_POST='];

for (var i = 0; i < video___VIDEO_NAME__links.length; i++) {
	var obj = document.getElementById(video___VIDEO_NAME__links[i][0]);

	obj.addEventListener("click", function(event) {
		var __VIDEO_NAME___div = document.getElementById("__VIDEO_NAME__");
		var top = __VIDEO_NAME___div.offsetTop - 5;
		var seek;

		for (var i = 0; i < video___VIDEO_NAME__links.length; i++) {
			if (this.id == video___VIDEO_NAME__links[i][0]) {
				seek = video___VIDEO_NAME__links[i][1];
			}
		}

		event.preventDefault();
		__VIDEO_NAME___player.dispose();
		__VIDEO_NAME___player = AsciinemaPlayer.create(
			"/builds/latest/web/__VIDEO_NAME__.cast",
			__VIDEO_NAME___div,
			{ cols: 240, rows: 51, poster: "npt:999:0", startAt: seek, autoplay: true });

		window.scrollTo({ top: top, behavior: "smooth" })
	}, false);
}
'

VIDEO_LINKS_BUF=
VIDEO_LINKS_COUNT=0

# video_append_links() - Append generic string to JavaScript links file
video_append_links()
{
	printf "${@}" >> "${BASEPATH}/${VIDEO_NAME}.js"
}

# video_append_links() - Append generic string to buffer for links
video_append_links_js()
{
	VIDEO_LINKS_BUF="${VIDEO_LINKS_BUF}${@}"
}

# video_start() - Mark start of a test in capture, record start timestamp
video_start() {
	VIDEO_NAME="${1}"

	echo "${VIDEO_LINKS_TEMPLATE}" > "${BASEPATH}/${VIDEO_NAME}.js"
	VIDEO_START_SECONDS=$(sed -n 's/\([0-9]*\).[0-9]* [0-9]*.[0-9]*/\1/p' /proc/uptime)

	sync
	[ ${DEMO} -eq 1 ] && tail -1 "${BASEPATH}/demo.uncut" > "${BASEPATH}/${VIDEO_NAME}.start"
	[ ${CI} -eq 1 ] && tail -1 "${BASEPATH}/ci.uncut" > "${BASEPATH}/${VIDEO_NAME}.start"
	sync

	tmux refresh-client
}

# video_stop() - Mark stop of a test in capture, finalise JavaScript fragments
video_stop() {
	tmux refresh-client

	sync
	[ ${DEMO} -eq 1 ] && tail -1 "${BASEPATH}/demo.uncut" > "${BASEPATH}/${VIDEO_NAME}.stop"
	[ ${CI} -eq 1 ] && tail -1 "${BASEPATH}/ci.uncut" > "${BASEPATH}/${VIDEO_NAME}.stop"
	sync

	sed -i 's/^.*$/&\\/g' "${BASEPATH}/${VIDEO_NAME}.js"
	echo "${VIDEO_LINKS_TEMPLATE_JS}" | sed "s/__VIDEO_NAME__/${VIDEO_NAME}/g" >> "${BASEPATH}/${VIDEO_NAME}.js"
	echo "${VIDEO_LINKS_BUF}" >> "${BASEPATH}/${VIDEO_NAME}.js"
	echo "${VIDEO_LINKS_TEMPLATE_POST}"  | sed "s/__VIDEO_NAME__/${VIDEO_NAME}/g" >> "${BASEPATH}/${VIDEO_NAME}.js"
}

# video_postprocess() - Cut terminal recordings based on .start and .stop files
video_postprocess() {
	IFS='
'
	__cast_name=
	for __l in $(cat ${1}); do
		[ -z "${__header}" ] && __header="${__l}" && continue

		if [ -z "${__cast_name}" ]; then
			for __cast_cut in *.start; do
				[ "${__l}" != "$(cat "${__cast_cut}")" ] && continue
				__cast_name="${__cast_cut%.start}"
				__cast_offset=
				__stop_line="$(cat ${__cast_name}.stop)"
				echo "${__header}" > "${__cast_name}.cast"
				break
			done
			continue
		fi

		[ "${__l}" = "${__stop_line}" ] && __cast_name= && continue

		__l_offset="$(echo ${__l%%.*}|tr -c -d '[:digit:]')"
		__l_rest="${__l#*.}"
		[ -z "${__cast_offset}" ] && __cast_offset=${__l_offset}
		__l_offset=$((__l_offset - __cast_offset))
		printf '[%s.%s\n' "${__l_offset}" "${__l_rest}" >> "${__cast_name}".cast
	done
	unset IFS
}

# video_time_now() - Print current video timestamp, in seconds
video_time_now() {
	__now=$(sed -n 's/\([0-9]*\).[0-9]* [0-9]*.[0-9]*/\1/p' /proc/uptime)
	echo $((__now - VIDEO_START_SECONDS))
}

# video_link() - Append single link to given video chapter
video_link() {
	[ ${VIDEO_LINKS_COUNT} -eq 0 ] && __sep="" || __sep=" |"
	__id="video_link_${VIDEO_LINKS_COUNT}"
	video_append_links "${__sep} <a id=\"${__id}\" href=\"${1}\">${1}</a>"
	video_append_links_js "[ '${__id}', $(($(video_time_now) - 1)) ],"

	VIDEO_LINKS_COUNT=$((VIDEO_LINKS_COUNT + 1))
}