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835cf4f753
bigbluebutton-Github/record-and-playback/presentation/scripts/publish/presentation.rb
germanocaumo 835cf4f753 fix(whiteboard): diff shape update + shape permission + 
Several improvements to tldraw whiteboard:
 - Only send the shape diff on shape updates (reduce a lot the message traffic)
 - Shape permissions (don't allow others to select/edit unless you are presenter/moderator)
  - This required some changes in akka model
 - Tldraw state patch changes to improve stability with fast updates (fix several crashes)
2022-10-21 14:05:31 +00:00

1476 lines
52 KiB
Ruby
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# frozen_string_literal: false
#
# BigBlueButton open source conferencing system - http://www.bigbluebutton.org/
#
# Copyright (c) 2012 BigBlueButton Inc. and by respective authors (see below).
#
# This program is free software; you can redistribute it and/or modify it under the
# terms of the GNU Lesser General Public License as published by the Free Software
# Foundation; either version 3.0 of the License, or (at your option) any later
# version.
#
# BigBlueButton 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with BigBlueButton; if not, see <http://www.gnu.org/licenses/>.
#
# For DEVELOPMENT
# Allows us to run the script manually
# require File.expand_path('../../../core/lib/recordandplayback', __dir__)
# For PRODUCTION
require File.expand_path('../../lib/recordandplayback', __dir__)
require 'rubygems'
require 'optimist'
require 'yaml'
require 'builder'
require 'fastimage' # require fastimage to get the image size of the slides (gem install fastimage)
require 'json'
require "active_support"
# This script lives in scripts/archive/steps while properties.yaml lives in scripts/
bbb_props = BigBlueButton.read_props
@presentation_props = YAML.safe_load(File.read('presentation.yml'))
filepathPresOverride = "/etc/bigbluebutton/recording/presentation.yml"
hasOverride = File.file?(filepathPresOverride)
if (hasOverride)
presOverrideProps = YAML::load(File.open(filepathPresOverride))
@presentation_props = @presentation_props.merge(presOverrideProps)
end
# There's a couple of places where stuff is mysteriously divided or multiplied
# by 2. This is just here to call out how spooky that is.
MAGIC_MYSTERY_NUMBER = 2
def scale_to_deskshare_video(width, height)
deskshare_video_height = deskshare_video_width = @presentation_props['deskshare_output_height'].to_f
scale_min = [deskshare_video_width / width, deskshare_video_height / height].min
video_width = width * scale_min
video_height = height * scale_min
[video_width.floor, video_height.floor]
end
def get_deskshare_video_dimension(deskshare_stream_name)
video_width = video_height = @presentation_props['deskshare_output_height'].to_f
deskshare_video_filename = "#{@deskshare_dir}/#{deskshare_stream_name}"
if File.exist?(deskshare_video_filename)
video_info = BigBlueButton::EDL::Video.video_info(deskshare_video_filename)
video_width, video_height = scale_to_deskshare_video(video_info[:width], video_info[:height])
else
BigBlueButton.logger.error("Could not find deskshare video: #{deskshare_video_filename}")
end
[video_width, video_height]
end
#
# Calculate the offsets based on the start and stop recording events, so it's easier
# to translate the timestamps later based on these offsets
#
def calculate_record_events_offset
accumulated_duration = 0
previous_stop_recording = @meeting_start.to_f
@rec_events.each do |event|
event_start = event[:start_timestamp]
event_stop = event[:stop_timestamp]
event[:offset] = event_start - accumulated_duration
event[:duration] = event_stop - event_start
event[:accumulated_duration] = accumulated_duration
previous_stop_recording = event_stop
accumulated_duration += event[:duration]
end
end
#
# Translated an arbitrary Unix timestamp to the recording timestamp
#
def translate_timestamp(timestamp)
timestamp = timestamp.to_f
@rec_events.each do |event|
start_timestamp = event[:start_timestamp]
# if the timestamp comes before the start recording event, then the timestamp is translated to the moment it starts recording
return (start_timestamp - event[:offset]).to_f if timestamp <= start_timestamp
# if the timestamp is during the recording period, it is just translated to the new one using the offset
return (timestamp - event[:offset]).to_f if (timestamp > start_timestamp) && (timestamp <= event[:stop_timestamp])
end
# if the timestamp comes after the last stop recording event, then the timestamp is translated to the last stop recording event timestamp
last_rec_event = @rec_events.last
(timestamp - last_rec_event[:offset] + last_rec_event[:duration]).to_f
end
def color_to_hex(color)
color = color.to_i.to_s(16)
('0' * (6 - color.length)) + color
end
def shape_scale_width(slide, x)
(x / 100.0 * slide[:width]).round(5)
end
def shape_scale_height(slide, y)
(y / 100.0 * slide[:height]).round(5)
end
def shape_thickness(slide, shape)
shape_thickness_percent = shape[:thickness_percent]
if shape_thickness_percent
shape_scale_width(slide, shape[:thickness_percent])
else
shape[:thickness]
end
end
def svg_render_shape_pencil(g, slide, shape)
shape_unique_id = shape[:shape_unique_id]
g['shape'] = "pencil#{shape_unique_id}"
doc = g.document
data_points = shape[:data_points]
data_points_length = data_points.length
if data_points_length < 2
BigBlueButton.logger.warn("Pencil #{shape_unique_id} doesn't have enough points")
return
end
if data_points_length == 2
g['style'] = "stroke:none;fill:##{shape[:color]};visibility:hidden"
circle = doc.create_element('circle',
cx: shape_scale_width(slide, data_points[0]),
cy: shape_scale_height(slide, data_points[1]),
r: (shape_thickness(slide, shape) / 2.0).round(5))
g << circle
else
path = []
data_points = data_points.each
shape_commands = shape[:commands]
if shape_commands
shape_commands.each do |command|
case command
when 1 # MOVE_TO
x = shape_scale_width(slide, data_points.next)
y = shape_scale_height(slide, data_points.next)
path.push("M#{x} #{y}")
when 2 # LINE_TO
x = shape_scale_width(slide, data_points.next)
y = shape_scale_height(slide, data_points.next)
path.push("L#{x} #{y}")
when 3 # Q_CURVE_TO
cx1 = shape_scale_width(slide, data_points.next)
cy1 = shape_scale_height(slide, data_points.next)
x = shape_scale_width(slide, data_points.next)
y = shape_scale_height(slide, data_points.next)
path.push("Q#{cx1} #{cy1},#{x} #{y}")
when 4 # C_CURVE_TO
cx1 = shape_scale_width(slide, data_points.next)
cy1 = shape_scale_height(slide, data_points.next)
cx2 = shape_scale_width(slide, data_points.next)
cy2 = shape_scale_height(slide, data_points.next)
x = shape_scale_width(slide, data_points.next)
y = shape_scale_height(slide, data_points.next)
path.push("C#{cx1} #{cy1},#{cx2} #{cy2},#{x} #{y}")
else
raise "Unknown pencil command: #{command}"
end
end
else
x = shape_scale_width(slide, data_points.next)
y = shape_scale_height(slide, data_points.next)
path << "M#{x} #{y}"
begin
loop do
x = shape_scale_width(slide, data_points.next)
y = shape_scale_height(slide, data_points.next)
path << "L#{x} #{y}"
end
rescue StopIteration
end
end
path = path.join
g['style'] = "stroke:##{shape[:color]};stroke-linecap:round;stroke-linejoin:round;" \
"stroke-width:#{shape_thickness(slide, shape)};visibility:hidden;fill:none"
svg_path = doc.create_element('path', d: path)
g << svg_path
end
end
def svg_render_shape_line(g, slide, shape)
g['shape'] = "line#{shape[:shape_unique_id]}"
g['style'] =
"stroke:##{shape[:color]};stroke-width:#{shape_thickness(slide, shape)};" \
"visibility:hidden;fill:none;stroke-linecap:#{@version_atleast_2_0_0 ? 'butt' : 'round'}"
doc = g.document
data_points = shape[:data_points]
line = doc.create_element('line',
x1: shape_scale_width(slide, data_points[0]),
y1: shape_scale_height(slide, data_points[1]),
x2: shape_scale_width(slide, data_points[2]),
y2: shape_scale_height(slide, data_points[3]))
g << line
end
def stroke_attributes(slide, shape)
"stroke:##{shape_color = shape[:color]};stroke-width:#{shape_thickness(slide, shape)};" \
"visibility:hidden;fill:#{shape[:fill] ? "##{shape_color}" : 'none'}"
end
def svg_render_shape_rect(g, slide, shape)
g['shape'] = "rect#{shape[:shape_unique_id]}"
g['style'] = "#{stroke_attributes(slide, shape)};stroke-linejoin:#{@version_atleast_2_0_0 ? 'miter' : 'round'}"
doc = g.document
data_points = shape[:data_points]
x1 = shape_scale_width(slide, data_points[0])
y1 = shape_scale_height(slide, data_points[1])
x2 = shape_scale_width(slide, data_points[2])
y2 = shape_scale_height(slide, data_points[3])
width = (x2 - x1).abs
if shape[:square]
# Convert to a square, keeping aligned with the start point.
if x2 > x1
y2 = y1 + width
else
# This replicates a bug in the BigBlueButton flash client
BigBlueButton.logger.info("Rect #{shape[:shape_unique_id]} reversed square bug")
y2 = y1 - width
end
end
path = doc.create_element('path', d: "M#{x1} #{y1}L#{x2} #{y1}L#{x2} #{y2}L#{x1} #{y2}Z")
g << path
end
def svg_render_shape_triangle(g, slide, shape)
g['shape'] = "triangle#{shape[:shape_unique_id]}"
g['style'] = "#{stroke_attributes(slide, shape)};" \
"stroke-linejoin:#{@version_atleast_2_0_0 ? 'miter;stroke-miterlimit:8' : 'round'}"
doc = g.document
data_points = shape[:data_points]
x1 = shape_scale_width(slide, data_points[0])
y1 = shape_scale_height(slide, data_points[1])
x2 = shape_scale_width(slide, data_points[2])
y2 = shape_scale_height(slide, data_points[3])
px = ((x1 + x2) / 2.0).round(5)
path = doc.create_element('path', d: "M#{px} #{y1}L#{x2} #{y2}L#{x1} #{y2}Z")
g << path
end
def svg_render_shape_ellipse(g, slide, shape)
g['shape'] = "ellipse#{shape[:shape_unique_id]}"
g['style'] = stroke_attributes(slide, shape)
doc = g.document
data_points = shape[:data_points]
x1 = shape_scale_width(slide, data_points[0])
y1 = shape_scale_height(slide, data_points[1])
x2 = shape_scale_width(slide, data_points[2])
y2 = shape_scale_height(slide, data_points[3])
width_r = ((x2 - x1).abs / 2.0).round(5)
height_r = ((y2 - y1).abs / 2.0).round(5)
hx = ((x1 + x2) / 2.0).round(5)
hy = ((y1 + y2) / 2.0).round(5)
if shape[:circle]
# Convert to a circle, keeping aligned with the start point
height_r = width_r
if x2 > x1
y2 = y1 + height_r + height_r
else
# This replicates a bug in the BigBlueButton flash client
BigBlueButton.logger.info("Ellipse #{shape[:shape_unique_id]} reversed circle bug")
y2 = y1 - height_r - height_r
end
end
# Normalize the x,y coordinates
x1, x2 = x2, x1 if x1 > x2
y1, y2 = y2, y1 if y1 > y2
# SVG's ellipse element doesn't render if r_x or r_y is 0, but
# we want to display a line segment in that case. But the SVG
# path element's elliptical arc code renders r_x or r_y
# degenerate cases as line segments, so we can use that.
path = "M#{x1} #{hy}" \
"A#{width_r} #{height_r} 0 0 1 #{hx} #{y1}" \
"A#{width_r} #{height_r} 0 0 1 #{x2} #{hy}" \
"A#{width_r} #{height_r} 0 0 1 #{hx} #{y2}" \
"A#{width_r} #{height_r} 0 0 1 #{x1} #{hy}" \
'Z'
svg_path = doc.create_element('path', d: path)
g << svg_path
end
def svg_render_shape_text(g, slide, shape)
g['shape'] = "text#{shape[:shape_unique_id]}"
doc = g.document
data_points = shape[:data_points]
x = shape_scale_width(slide, data_points[0])
y = shape_scale_height(slide, data_points[1])
width = shape_scale_width(slide, shape[:text_box_width])
height = shape_scale_height(slide, shape[:text_box_height])
font_size = shape_scale_height(slide, shape[:calced_font_size])
g['style'] = "color:##{shape[:font_color]};word-wrap:break-word;visibility:hidden;font-family:Arial;font-size:#{font_size}px"
switch = doc.create_element('switch')
fo = doc.create_element('foreignObject',
width: width, height: height, x: x, y: y)
p = doc.create_element('p',
xmlns: 'http://www.w3.org/1999/xhtml', style: 'margin:0;padding:0')
shape[:text].each_line.with_index do |line, index|
p << doc.create_element('br') if index.positive?
p << doc.create_text_node(line.chomp)
end
fo << p
switch << fo
g << switch
end
def svg_render_shape_poll(g, slide, shape)
result = shape[:result]
if result == "[]"
BigBlueButton.logger.info("Poll #{shape[:shape_unique_id]} result is empty (no options/answers), ignoring...")
return
end
poll_id = shape[:shape_unique_id]
g['shape'] = "poll#{poll_id}"
g['style'] = 'visibility:hidden'
doc = g.document
data_points = shape[:data_points]
x = shape_scale_width(slide, data_points[0])
y = shape_scale_height(slide, data_points[1])
width = shape_scale_width(slide, data_points[2])
height = shape_scale_height(slide, data_points[3])
num_responders = shape[:num_responders]
presentation = slide[:presentation]
json_file = "#{@process_dir}/poll_result#{poll_id}.json"
svg_file = "#{@process_dir}/presentation/#{presentation}/poll_result#{poll_id}.svg"
# Save the poll json to a temp file
File.open(json_file, 'w') { |f| f.write result }
# Render the poll svg
ret = BigBlueButton.exec_ret('utils/gen_poll_svg', '-i', json_file, '-w', width.round.to_s, '-h', height.round.to_s,
'-n', num_responders.to_s, '-o', svg_file)
raise 'Failed to generate poll svg' if ret != 0
# Poll image
g << doc.create_element('image',
'xlink:href' => "presentation/#{presentation}/poll_result#{poll_id}.svg",
width: width, height: height, x: x, y: y)
end
def build_tldraw_shape(image_shapes, slide, shape)
shape_in = shape[:in]
shape_out = shape[:out]
if shape_in == shape_out
BigBlueButton.logger.info("Draw #{shape[:shape_id]} Shape #{shape[:shape_unique_id]} is never shown (duration rounds to 0)")
return
end
if (shape_in >= slide[:out]) || (!shape[:out].nil? && shape[:out] <= slide[:in])
BigBlueButton.logger.info("Draw #{shape[:shape_id]} Shape #{shape[:shape_unique_id]} is not visible during image time span")
return
end
tldraw_shape = {
id: shape[:shape_id],
timestamp: shape_in,
undo: (shape[:undo].nil? ? -1 : shape[:undo]),
shape_data: shape[:shape_data]
}
image_shapes.push(tldraw_shape)
end
def svg_render_shape(canvas, slide, shape, image_id)
shape_in = shape[:in]
shape_out = shape[:out]
if shape_in == shape_out
BigBlueButton.logger.info("Draw #{shape[:shape_id]} Shape #{shape[:shape_unique_id]} is never shown (duration rounds to 0)")
return
end
if (shape_in >= slide[:out]) || (!shape[:out].nil? && shape[:out] <= slide[:in])
BigBlueButton.logger.info("Draw #{shape[:shape_id]} Shape #{shape[:shape_unique_id]} is not visible during image time span")
return
end
doc = canvas.document
g = doc.create_element('g',
id: "image#{image_id}-draw#{shape[:shape_id]}", class: 'shape',
timestamp: shape_in, undo: (shape[:undo].nil? ? -1 : shape[:undo]))
case shape[:type]
when 'pencil'
svg_render_shape_pencil(g, slide, shape)
when 'line'
svg_render_shape_line(g, slide, shape)
when 'rectangle'
svg_render_shape_rect(g, slide, shape)
when 'triangle'
svg_render_shape_triangle(g, slide, shape)
when 'ellipse'
svg_render_shape_ellipse(g, slide, shape)
when 'text'
svg_render_shape_text(g, slide, shape)
when 'poll_result'
svg_render_shape_poll(g, slide, shape)
else
BigBlueButton.logger.warn("Ignoring unhandled shape type #{shape[:type]}")
end
g[:shape] = "image#{image_id}-#{g[:shape]}"
canvas << g unless g.element_children.empty?
end
@svg_image_id = 1
def svg_render_image(svg, slide, shapes, tldraw, tldraw_shapes)
slide_number = slide[:slide]
presentation = slide[:presentation]
slide_in = slide[:in]
slide_out = slide[:out]
if slide_in == slide_out || slide_in > (@recording_time / 1000)
BigBlueButton.logger.info("Presentation #{presentation} Slide #{slide_number} is never shown (duration rounds to 0)")
return
end
image_id = @svg_image_id
@svg_image_id += 1
slide_deskshare = slide[:deskshare]
BigBlueButton.logger.info("Image #{image_id}: Presentation #{presentation} Slide #{slide_number} Deskshare #{slide_deskshare} from #{slide_in} to #{slide_out}")
doc = svg.document
image = doc.create_element('image',
id: "image#{image_id}", class: 'slide',
in: slide_in, out: slide_out,
'xlink:href' => slide[:src],
width: slide[:width], height: slide[:height], x: 0, y: 0,
style: 'visibility:hidden')
image['text'] = slide[:text] if slide[:text]
svg << image
return if slide_deskshare || !shapes.dig(presentation, slide_number)
shapes = shapes[presentation][slide_number]
if !tldraw
canvas = doc.create_element('g',
class: 'canvas', id: "canvas#{image_id}",
image: "image#{image_id}", display: 'none')
shapes.each do |shape|
svg_render_shape(canvas, slide, shape, image_id)
end
svg << canvas unless canvas.element_children.empty?
else
image_shapes = []
shapes.each do |shape|
build_tldraw_shape(image_shapes, slide, shape)
end
tldraw_shapes[image_id] = { :shapes=>image_shapes, :timestamp=> slide_in}
end
end
def panzoom_viewbox(panzoom, tldraw)
if panzoom[:deskshare]
panzoom[:x_offset] = panzoom[:y_offset] = 0.0
panzoom[:width_ratio] = panzoom[:height_ratio] = 100.0
end
if tldraw
x = panzoom[:x_offset]
y = panzoom[:y_offset]
else
x = (-panzoom[:x_offset] * MAGIC_MYSTERY_NUMBER / 100.0 * panzoom[:width]).round(5)
y = (-panzoom[:y_offset] * MAGIC_MYSTERY_NUMBER / 100.0 * panzoom[:height]).round(5)
end
w = shape_scale_width(panzoom, panzoom[:width_ratio])
h = shape_scale_height(panzoom, panzoom[:height_ratio])
[x, y, w, h]
end
def panzooms_emit_event(rec, panzoom, tldraw)
panzoom_in = panzoom[:in]
return if panzoom_in == panzoom[:out]
rec.event(timestamp: panzoom_in) do
x, y, w, h = panzoom_viewbox(panzoom, tldraw)
rec.viewBox("#{x} #{y} #{w} #{h}")
end
end
def convert_cursor_coordinate(cursor_coord, panzoom_offset, panzoom_ratio)
(((cursor_coord / 100.0) + (panzoom_offset * MAGIC_MYSTERY_NUMBER / 100.0)) / (panzoom_ratio / 100.0)).round(5)
end
def cursors_emit_event(rec, cursor, tldraw)
cursor_in = cursor[:in]
return if cursor_in == cursor[:out]
rec.event(timestamp: cursor_in) do
panzoom = cursor[:panzoom]
if cursor[:visible]
if @version_atleast_2_0_0 && !tldraw
# In BBB 2.0, the cursor now uses the same coordinate system as annotations
# Use the panzoom information to convert it to be relative to viewbox
x = convert_cursor_coordinate(cursor[:x], panzoom[:x_offset], panzoom[:width_ratio])
y = convert_cursor_coordinate(cursor[:y], panzoom[:y_offset], panzoom[:height_ratio])
x = y = -1.0 if (x < 0) || (x > 1) || (y < 0) || (y > 1)
else
# Cursor position is relative to the visible area
x = cursor[:x].round(5)
y = cursor[:y].round(5)
end
else
x = y = -1.0
end
rec.cursor("#{x} #{y}")
end
end
def determine_presentation(presentation, current_presentation)
presentation&.text || current_presentation
end
def determine_slide_number(slide, current_slide)
return current_slide unless slide
slide = slide.text.to_i
slide -= 1 unless @version_atleast_0_9_0
slide
end
def events_parse_tldraw_shape(shapes, event, current_presentation, current_slide, timestamp)
presentation = event.at_xpath('presentation')
slide = event.at_xpath('pageNumber')
presentation = determine_presentation(presentation, current_presentation)
slide = determine_slide_number(slide, current_slide)
# Set up the shapes data structures if needed
shapes[presentation] ||= {}
shapes[presentation][slide] ||= []
# We only need to deal with shapes for this slide
shapes = shapes[presentation][slide]
# Set up the structure for this shape
shape = {}
# Common properties
shape[:in] = timestamp
shape_data = shape[:shape_data] = JSON.parse(event.at_xpath('shapeData'))
user_id = event.at_xpath('userId')&.text
shape[:user_id] = user_id if user_id
shape_id = event.at_xpath('shapeId')&.text
shape[:id] = shape_id if shape_id
draw_id = shape[:shape_id] = @svg_shape_id
@svg_shape_id += 1
# Find the previous shape, for updates
prev_shape = nil
if shape_id
# If we have a shape ID, look up the previous shape by ID
prev_shape_pos = shapes.rindex { |s| s[:id] == shape_id }
prev_shape = prev_shape_pos ? shapes[prev_shape_pos] : nil
end
if prev_shape
prev_shape[:out] = timestamp
shape[:shape_unique_id] = prev_shape[:shape_unique_id]
shape[:shape_data] = prev_shape[:shape_data].deep_merge(shape[:shape_data])
else
shape[:shape_unique_id] = @svg_shape_unique_id
@svg_shape_unique_id += 1
end
shapes << shape
end
def events_parse_shape(shapes, event, current_presentation, current_slide, timestamp)
# Figure out what presentation+slide this shape is for, with fallbacks
# for old BBB where this info isn't in the shape messages
presentation = event.at_xpath('presentation')
slide = event.at_xpath('pageNumber')
presentation = determine_presentation(presentation, current_presentation)
slide = determine_slide_number(slide, current_slide)
# Set up the shapes data structures if needed
shapes[presentation] ||= {}
shapes[presentation][slide] ||= []
# We only need to deal with shapes for this slide
shapes = shapes[presentation][slide]
# Set up the structure for this shape
shape = {}
# Common properties
shape[:in] = timestamp
shape_type = shape[:type] = event.at_xpath('type').text
shape_data_points = shape[:data_points] = event.at_xpath('dataPoints').text.split(',').map(&:to_f)
# These can be missing in old BBB versions, there are fallbacks
user_id = event.at_xpath('userId')&.text
shape[:user_id] = user_id if user_id
shape_id = event.at_xpath('id')&.text
shape[:id] = shape_id if shape_id
status = event.at_xpath('status')&.text
shape_status = shape[:status] = status if status
draw_id = shape[:shape_id] = @svg_shape_id
@svg_shape_id += 1
# Some shape-specific properties
if %w[ellipse line pencil rectangle triangle].include?(shape_type)
shape[:color] = color_to_hex(event.at_xpath('color').text)
thickness = event.at_xpath('thickness')
unless thickness
BigBlueButton.logger.warn("Draw #{draw_id} Shape #{shape[:shape_unique_id]} ID #{shape_id} is missing thickness")
return
end
if @version_atleast_2_0_0
shape[:thickness_percent] = thickness.text.to_f
else
shape[:thickness] = thickness.text.to_i
end
end
if %w[ellipse rectangle triangle].include?(shape_type)
fill = event.at_xpath('fill')&.text || 'false'
shape[:fill] = fill =~ /true/ ? true : false
end
case shape_type
when 'rectangle'
square = event.at_xpath('square')&.text
shape[:square] = (square == 'true') if square
when 'ellipse'
circle = event.at_xpath('circle')&.text
shape[:circle] = (circle == 'true') if circle
when 'pencil'
commands = event.at_xpath('commands')&.text
shape[:commands] = commands.split(',').map(&:to_i) if commands
when 'poll_result'
shape[:num_responders] = event.at_xpath('num_responders').text.to_i
shape[:num_respondents] = event.at_xpath('num_respondents').text.to_i
shape[:result] = event.at_xpath('result').text
when 'text'
shape[:text_box_width] = event.at_xpath('textBoxWidth').text.to_f
shape[:text_box_height] = event.at_xpath('textBoxHeight').text.to_f
calced_font_size = event.at_xpath('calcedFontSize')
unless calced_font_size
BigBlueButton.logger.warn("Draw #{draw_id} Shape #{shape[:shape_unique_id]} ID #{shape_id} is missing calcedFontSize")
return
end
shape[:calced_font_size] = calced_font_size.text.to_f
shape[:font_color] = color_to_hex(event.at_xpath('fontColor').text)
shape[:text] = event.at_xpath('text')&.text || ''
end
# Find the previous shape, for updates
prev_shape = nil
if shape_id
# If we have a shape ID, look up the previous shape by ID
# Don't look for updates if the drawing has ended
prev_shape_pos = shapes.rindex { |s| s[:id] == shape_id }
prev_shape = prev_shape_pos ? shapes[prev_shape_pos] : nil
else
# No shape ID, so do heuristic matching. If the previous shape had the
# same type and same first two data points, update it.
last_shape = shapes.last
last_shape_data_points = last_shape[:data_points]
if (last_shape[:type] == shape_type) &&
(last_shape_data_points[0] == shape_data_points[0]) &&
(last_shape_data_points[1] == shape_data_points[1])
prev_shape = last_shape
end
end
if prev_shape
prev_shape[:out] = timestamp
shape[:shape_unique_id] = prev_shape[:shape_unique_id]
if (shape_type == 'pencil') && (shape_status == 'DRAW_UPDATE')
# BigBlueButton 2.0 quirk - 'DRAW_UPDATE' events on pencil tool only
# include newly added points, rather than the full list.
shape[:data_points] = prev_shape[:data_points] + shape_data_points
end
else
shape[:shape_unique_id] = @svg_shape_unique_id
@svg_shape_unique_id += 1
end
shapes << shape
end
def set_undo_helper(shapes, key, id, timestamp)
shapes.each do |shape|
next unless shape[key] == id
shape[:undo] = timestamp if !shape[:undo] || (shape[:undo] > timestamp)
end
end
def events_parse_undo(shapes, event, current_presentation, current_slide, timestamp)
# Figure out what presentation+slide this undo is for, with fallbacks
# for old BBB where this info isn't in the undo messages
presentation = determine_presentation(event.at_xpath('presentation'), current_presentation)
slide = determine_slide_number(event.at_xpath('pageNumber'), current_slide)
# Newer undo messages have the shape id, making this a lot easier
shape_id = event.at_xpath('shapeId')&.text
# Set up the shapes data structures if needed
shapes[presentation] ||= {}
shapes[presentation][slide] ||= []
# We only need to deal with shapes for this slide
shapes = shapes[presentation][slide]
if shape_id
# If we have the shape id, we simply have to update the undo time on
# all the shapes with that id.
BigBlueButton.logger.info("Undo: removing shape with ID #{shape_id} at #{timestamp}")
set_undo_helper(shapes, :id, shape_id, timestamp)
else
# The undo command removes the most recently added shape that has not
# already been removed by another undo or clear. Find that shape.
undo_pos = shapes.rindex { |s| !s[:undo] }
undo_shape = undo_pos ? shapes[undo_pos] : nil
if undo_shape
undo_shape_unique_id = undo_shape[:shape_unique_id]
BigBlueButton.logger.info("Undo: removing Shape #{undo_shape_unique_id} at #{timestamp}")
# We have an id number assigned to associate all the updated versions
# of the same shape. Use that to determine which shapes to apply undo
# times to.
set_undo_helper(shapes, :shape_unique_id, undo_shape_unique_id, timestamp)
else
BigBlueButton.logger.info('Undo: no applicable shapes found')
end
end
end
def events_parse_clear(shapes, event, current_presentation, current_slide, timestamp)
# Figure out what presentation+slide this clear is for, with fallbacks
# for old BBB where this info isn't in the clear messages
presentation = determine_presentation(event.at_xpath('presentation'), current_presentation)
slide = determine_slide_number(event.at_xpath('pageNumber'), current_slide)
# BigBlueButton 2.0 per-user clear features; default to full clear on older versions
full_clear = event.at_xpath('fullClear')
full_clear = full_clear ? (full_clear.text == 'true') : true
user_id = event.at_xpath('userId')&.text
# Set up the shapes data structures if needed
shapes[presentation] ||= {}
shapes[presentation][slide] ||= []
# We only need to deal with shapes for this slide
shapes = shapes[presentation][slide]
if full_clear
BigBlueButton.logger.info("Clear: removing all shapes")
else
BigBlueButton.logger.info("Clear: removing shapes for User #{user_id}")
end
shapes.each do |shape|
if full_clear || user_id == shape[:user_id]
if !shape[:undo] || shape[:undo] > timestamp
shape[:undo] = timestamp
end
end
end
end
def events_get_image_info(slide, tldraw)
slide_deskshare = slide[:deskshare]
slide_presentation = slide[:presentation]
if slide_deskshare
slide[:src] = 'presentation/deskshare.png'
elsif slide_presentation == ''
slide[:src] = 'presentation/logo.png'
else
slide_nr = slide[:slide] + 1
tldraw ? slide[:src] = "presentation/#{slide_presentation}/svgs/slide#{slide_nr}.svg"
: slide[:src] = "presentation/#{slide_presentation}/slide-#{slide_nr}.png"
slide[:text] = "presentation/#{slide_presentation}/textfiles/slide-#{slide_nr}.txt"
end
image_path = "#{@process_dir}/#{slide[:src]}"
unless File.exist?(image_path)
BigBlueButton.logger.warn("Missing image file #{image_path}!")
# Emergency last-ditch blank image creation
FileUtils.mkdir_p(File.dirname(image_path))
command = \
if slide_deskshare
['convert', '-size',
"#{@presentation_props['deskshare_output_width']}x#{@presentation_props['deskshare_output_height']}", 'xc:transparent', '-background', 'transparent', image_path,]
else
['convert', '-size', '1600x1200', 'xc:transparent', '-background', 'transparent', '-quality', '90', '+dither',
'-depth', '8', '-colors', '256', image_path,]
end
BigBlueButton.exec_ret(*command) || raise("Unable to generate blank image for #{image_path}")
end
slide[:width], slide[:height] = FastImage.size(image_path)
BigBlueButton.logger.info("Image size is #{slide[:width]}x#{slide[:height]}")
end
# Create the shapes.svg, cursors.xml, and panzooms.xml files used for
# rendering the presentation area
def process_presentation(package_dir)
shapes_doc = Nokogiri::XML::Document.new
shapes_doc.create_internal_subset('svg', '-//W3C//DTD SVG 1.1//EN',
'http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd')
svg = shapes_doc.root = shapes_doc.create_element('svg',
id: 'svgfile',
style: 'position:absolute;height:600px;width:800px',
xmlns: 'http://www.w3.org/2000/svg',
'xmlns:xlink' => 'http://www.w3.org/1999/xlink',
version: '1.1',
viewBox: '0 0 800 600')
panzooms_rec = Builder::XmlMarkup.new(indent: 2, margin: 1)
cursors_rec = Builder::XmlMarkup.new(indent: 2, margin: 1)
# Current presentation/slide state
current_presentation_slide = {}
current_presentation = ''
current_slide = 0
# Current pan/zoom state
current_x_offset = current_y_offset = 0.0
current_width_ratio = current_height_ratio = 100.0
current_x_camera = current_y_camera = current_zoom = 0.0
# Current cursor status
cursor_x = cursor_y = -1.0
cursor_visible = false
presenter = nil
# Current deskshare state (affects presentation and pan/zoom)
deskshare = false
slides = []
panzooms = []
cursors = []
shapes = {}
tldraw = @version_atleast_2_6_0
tldraw_shapes = {}
# Iterate through the events.xml and store the events, building the
# xml files as we go
last_timestamp = 0.0
events_xml = Nokogiri::XML(File.read("#{@process_dir}/events.xml"))
events_xml.xpath('/recording/event').each do |event|
eventname = event['eventname']
last_timestamp = timestamp =
(translate_timestamp(event['timestamp']) / 1000.0).round(1)
# Make sure to add initial entries to the slide & panzoom lists
slide_changed = slides.empty?
panzoom_changed = panzooms.empty?
cursor_changed = cursors.empty?
# Do event specific processing
case eventname
when 'SharePresentationEvent'
current_presentation = event.at_xpath('presentationName').text
current_slide = current_presentation_slide[current_presentation].to_i
slide_changed = panzoom_changed = true
when 'GotoSlideEvent'
current_slide = event.at_xpath('slide').text.to_i
current_presentation_slide[current_presentation] = current_slide
slide_changed = panzoom_changed = true
when 'ResizeAndMoveSlideEvent'
current_x_offset = event.at_xpath('xOffset').text.to_f
current_y_offset = event.at_xpath('yOffset').text.to_f
current_width_ratio = event.at_xpath('widthRatio').text.to_f
current_height_ratio = event.at_xpath('heightRatio').text.to_f
panzoom_changed = true
when 'DeskshareStartedEvent', 'StartWebRTCDesktopShareEvent'
deskshare = slide_changed = true if @presentation_props['include_deskshare']
when 'DeskshareStoppedEvent', 'StopWebRTCDesktopShareEvent'
if @presentation_props['include_deskshare']
deskshare = false
slide_changed = true
end
when 'AddShapeEvent', 'ModifyTextEvent'
events_parse_shape(shapes, event, current_presentation, current_slide, timestamp)
when 'AddTldrawShapeEvent'
events_parse_tldraw_shape(shapes, event, current_presentation, current_slide, timestamp)
when 'UndoShapeEvent', 'UndoAnnotationEvent', 'DeleteTldrawShapeEvent'
events_parse_undo(shapes, event, current_presentation, current_slide, timestamp)
when 'ClearPageEvent', 'ClearWhiteboardEvent'
events_parse_clear(shapes, event, current_presentation, current_slide, timestamp)
when 'AssignPresenterEvent'
# Move cursor offscreen on presenter switch, it'll reappear if the new
# presenter moves it
presenter = event.at_xpath('userid').text
cursor_visible = false
cursor_changed = true
when 'CursorMoveEvent'
cursor_x = event.at_xpath('xOffset').text.to_f
cursor_y = event.at_xpath('yOffset').text.to_f
cursor_visible = cursor_changed = true
when 'WhiteboardCursorMoveEvent'
user_id = event.at_xpath('userId')&.text
# Only draw cursor for current presentor. TODO multi-cursor support
if !user_id || user_id == presenter
cursor_x = event.at_xpath('xOffset').text.to_f
cursor_y = event.at_xpath('yOffset').text.to_f
cursor_visible = cursor_changed = true
end
end
# Perform slide finalization
if slide_changed
slide = slides.last
if slide &&
(slide[:presentation] == current_presentation) &&
(slide[:slide] == current_slide) &&
(slide[:deskshare] == deskshare)
BigBlueButton.logger.info('Presentation/Slide: skipping, no changes')
else
if slide
slide[:out] = timestamp
svg_render_image(svg, slide, shapes, tldraw, tldraw_shapes)
end
BigBlueButton.logger.info("Presentation #{current_presentation} Slide #{current_slide} Deskshare #{deskshare}")
slide = {
presentation: current_presentation,
slide: current_slide,
in: timestamp,
deskshare: deskshare,
}
events_get_image_info(slide, tldraw)
slides << slide
end
end
# Perform panzoom finalization
if panzoom_changed
slide = slides.last
panzoom = panzooms.last
slide_width = slide[:width]
slide_height = slide[:height]
if panzoom &&
(panzoom[:x_offset] == current_x_offset) &&
(panzoom[:y_offset] == current_y_offset) &&
(panzoom[:width_ratio] == current_width_ratio) &&
(panzoom[:height_ratio] == current_height_ratio) &&
(panzoom[:width] == slide_width) &&
(panzoom[:height] == slide_height) &&
(panzoom[:deskshare] == deskshare)
BigBlueButton.logger.info('Panzoom: skipping, no changes')
panzoom_changed = false
else
if panzoom
panzoom[:out] = timestamp
panzooms_emit_event(panzooms_rec, panzoom, tldraw)
end
BigBlueButton.logger.info("Panzoom: #{current_x_offset} #{current_y_offset} #{current_width_ratio} #{current_height_ratio} (#{slide_width}x#{slide_height})")
panzoom = {
x_offset: current_x_offset,
y_offset: current_y_offset,
width_ratio: current_width_ratio,
height_ratio: current_height_ratio,
width: slide[:width],
height: slide[:height],
in: timestamp,
deskshare: deskshare,
}
panzooms << panzoom
end
end
# Perform cursor finalization
if cursor_changed || panzoom_changed
if !tldraw
unless cursor_x >= 0 && cursor_x <= 100 &&
cursor_y >= 0 && cursor_y <= 100
cursor_visible = false
end
end
panzoom = panzooms.last
cursor = cursors.last
if cursor &&
((!cursor[:visible] && !cursor_visible) ||
(cursor[:x] == cursor_x && cursor[:y] == cursor_y)) &&
!panzoom_changed
BigBlueButton.logger.info('Cursor: skipping, no changes')
else
if cursor
cursor[:out] = timestamp
cursors_emit_event(cursors_rec, cursor, tldraw)
end
cursor = {
visible: cursor_visible,
x: cursor_x,
y: cursor_y,
panzoom: panzoom,
in: timestamp,
}
cursors << cursor
end
end
end
# Add the last slide, panzoom, and cursor
slide = slides.last
slide[:out] = last_timestamp
svg_render_image(svg, slide, shapes, tldraw, tldraw_shapes)
panzoom = panzooms.last
panzoom[:out] = last_timestamp
panzooms_emit_event(panzooms_rec, panzoom, tldraw)
cursor = cursors.last
cursor[:out] = last_timestamp
cursors_emit_event(cursors_rec, cursor, tldraw)
cursors_doc = Builder::XmlMarkup.new(indent: 2)
cursors_doc.instruct!
cursors_doc.recording(id: 'cursor_events', tldraw: tldraw) { |xml| xml << cursors_rec.target! }
panzooms_doc = Builder::XmlMarkup.new(indent: 2)
panzooms_doc.instruct!
panzooms_doc.recording(id: 'panzoom_events', tldraw: tldraw) { |xml| xml << panzooms_rec.target! }
# And save the result
File.write("#{package_dir}/#{@shapes_svg_filename}", shapes_doc.to_xml)
File.write("#{package_dir}/#{@panzooms_xml_filename}", panzooms_doc.target!)
File.write("#{package_dir}/#{@cursor_xml_filename}", cursors_doc.target!)
generate_json_file(package_dir, @tldraw_shapes_filename, tldraw_shapes) if tldraw
end
def process_chat_messages(events, bbb_props)
BigBlueButton.logger.info('Processing chat events')
# Create slides.xml and chat.
xml = Builder::XmlMarkup.new(indent: 2)
xml.instruct!
xml.popcorn do
BigBlueButton::Events.get_chat_events(events, @meeting_start.to_i, @meeting_end.to_i, bbb_props).each do |chat|
chattimeline = {
in: (chat[:in] / 1000.0).round(1),
direction: 'down',
name: chat[:sender],
chatEmphasizedText: chat[:chatEmphasizedText],
senderRole: chat[:senderRole],
message: chat[:message],
target: 'chat',
}
if (chat[:out])
chattimeline[:out] = (chat[:out] / 1000.0).round(1)
end
xml.chattimeline(**chattimeline)
end
end
xml
end
def process_deskshare_events(events)
BigBlueButton.logger.info('Processing deskshare events')
deskshare_matched_events = BigBlueButton::Events.get_matched_start_and_stop_deskshare_events(events)
@deskshare_xml = Builder::XmlMarkup.new(indent: 2)
@deskshare_xml.instruct!
@deskshare_xml.recording('id' => 'deskshare_events') do
deskshare_matched_events.each do |event|
start_timestamp = (translate_timestamp(event[:start_timestamp].to_f) / 1000).round(1)
stop_timestamp = (translate_timestamp(event[:stop_timestamp].to_f) / 1000).round(1)
next unless start_timestamp != stop_timestamp
video_info = BigBlueButton::EDL::Video.video_info("#{@deskshare_dir}/#{event_stream = event[:stream]}")
unless video_info[:video]
BigBlueButton.logger.warn("#{event_stream} is not a valid video file, skipping...")
next
end
video_width, video_height = get_deskshare_video_dimension(event_stream)
@deskshare_xml.event(start_timestamp: start_timestamp,
stop_timestamp: stop_timestamp,
video_width: video_width,
video_height: video_height)
end
end
end
def get_poll_question(event)
event.at_xpath('question')&.text || ''
end
def get_poll_answers(event)
answers = []
answers_event = event.at_xpath('answers')
if (answers_event)
answers = JSON.parse(answers_event.content)
end
answers
end
def get_poll_respondents(event)
event.at_xpath('numRespondents')&.text.to_i || 0
end
def get_poll_responders(event)
event.at_xpath('numResponders')&.text.to_i || 0
end
def get_poll_id(event)
event.at_xpath('pollId')&.text || ''
end
def get_poll_type(events, published_poll_event)
published_poll_id = get_poll_id(published_poll_event)
type = ''
events.xpath("recording/event[@eventname='PollStartedRecordEvent']").each do |event|
poll_id = get_poll_id(event)
if poll_id.eql?(published_poll_id)
type = event.at_xpath('type').text
break
end
end
type
end
def generate_json_file(package_dir, filename, contents)
File.open("#{package_dir}/#{filename}", 'w') { |f| f.puts(contents.to_json) } unless contents.empty?
end
def process_poll_events(events, package_dir)
BigBlueButton.logger.info('Processing poll events')
published_polls = []
@rec_events.each do |re|
events.xpath("recording/event[@eventname='PollPublishedRecordEvent']").each do |event|
timestamp = event[:timestamp]
next unless (timestamp.to_i >= re[:start_timestamp]) && (timestamp.to_i <= re[:stop_timestamp])
published_polls << {
timestamp: (translate_timestamp(timestamp) / 1000).to_i,
type: get_poll_type(events, event),
question: get_poll_question(event),
answers: get_poll_answers(event),
respondents: get_poll_respondents(event),
responders: get_poll_responders(event),
}
end
end
generate_json_file(package_dir, 'polls.json', published_polls)
end
def process_external_video_events(_events, package_dir)
BigBlueButton.logger.info('Processing external video events')
# Retrieve external video events
external_video_events = BigBlueButton::Events.match_start_and_stop_external_video_events(
BigBlueButton::Events.get_start_and_stop_external_video_events(@doc)
)
external_videos = []
@rec_events.each do |re|
external_video_events.each do |event|
BigBlueButton.logger.info("Processing rec event #{re} and external video event #{event}")
start_timestamp = event[:start_timestamp]
timestamp = (translate_timestamp(start_timestamp) / 1000).to_i
# do not add same external_video twice
next if external_videos.find { |ev| ev[:timestamp] == timestamp }
re_start_timestamp = re[:start_timestamp]
re_stop_timestamp = re[:stop_timestamp]
next unless ((start_timestamp >= re_start_timestamp) && (start_timestamp <= re_stop_timestamp)) ||
((start_timestamp < re_start_timestamp) && (re_stop_timestamp >= re_start_timestamp))
external_videos << {
timestamp: timestamp,
external_video_url: event[:external_video_url],
}
end
end
generate_json_file(package_dir, 'external_videos.json', external_videos)
end
def generate_done_or_fail_file(success)
File.open("#{@recording_dir}/status/published/#{@meeting_id}-presentation#{success ? '.done' : '.fail'}", 'w') do |file|
file.write("#{success ? 'Published' : 'Failed publishing'} #{@meeting_id}")
end
end
def copy_media_files_helper(media, media_files, package_dir)
BigBlueButton.logger.info("Making #{media} dir")
FileUtils.mkdir_p(media_dir = "#{package_dir}/#{media}")
media_files.each do |media_file|
BigBlueButton.logger.info("Made #{media} dir - copying: #{media_file} to -> #{media_dir}")
FileUtils.cp(media_file, media_dir)
BigBlueButton.logger.info("Copied #{File.extname(media_file)} file")
end
end
@shapes_svg_filename = 'shapes.svg'
@panzooms_xml_filename = 'panzooms.xml'
@cursor_xml_filename = 'cursor.xml'
@deskshare_xml_filename = 'deskshare.xml'
@tldraw_shapes_filename = 'tldraw.json'
@svg_shape_id = 1
@svg_shape_unique_id = 1
opts = Optimist.options do
opt :meeting_id, 'Meeting id to archive', default: '58f4a6b3-cd07-444d-8564-59116cb53974', type: String
end
@meeting_id = opts[:meeting_id]
match = /(.*)-(.*)/.match @meeting_id
@meeting_id = match[1]
@playback = match[2]
begin
if @playback == 'presentation'
log_dir = bbb_props['log_dir']
logger = Logger.new("#{log_dir}/presentation/publish-#{@meeting_id}.log", 'daily')
BigBlueButton.logger = logger
BigBlueButton.logger.info('Setting recording dir')
@recording_dir = bbb_props['recording_dir']
BigBlueButton.logger.info('Setting process dir')
@process_dir = "#{@recording_dir}/process/presentation/#{@meeting_id}"
BigBlueButton.logger.info('Setting publish dir')
publish_dir = @presentation_props['publish_dir']
BigBlueButton.logger.info('Setting playback url info')
playback_protocol = bbb_props['playback_protocol']
playback_host = bbb_props['playback_host']
BigBlueButton.logger.info('Setting target dir')
target_dir = "#{@recording_dir}/publish/presentation/#{@meeting_id}"
@deskshare_dir = "#{@recording_dir}/raw/#{@meeting_id}/deskshare"
if FileTest.directory?(target_dir)
BigBlueButton.logger.info("#{target_dir} is already there")
else
BigBlueButton.logger.info('Making dir target_dir')
FileUtils.mkdir_p target_dir
package_dir = "#{target_dir}/#{@meeting_id}"
BigBlueButton.logger.info('Making dir package_dir')
FileUtils.mkdir_p package_dir
begin
video_formats = @presentation_props['video_formats']
video_files = Dir.glob("#{@process_dir}/webcams.{#{video_formats.join(',')}}")
if video_files.empty?
copy_media_files_helper('audio', ["#{@process_dir}/audio.webm", "#{@process_dir}/audio.ogg"], package_dir)
else
copy_media_files_helper('video', video_files, package_dir)
end
video_files = Dir.glob("#{@process_dir}/deskshare.{#{video_formats.join(',')}}")
if video_files.empty?
BigBlueButton.logger.info("Could not copy deskshares.webm: file doesn't exist")
else
copy_media_files_helper('deskshare', video_files, package_dir)
end
if File.exist?("#{@process_dir}/captions.json")
BigBlueButton.logger.info('Copying caption files')
FileUtils.cp("#{@process_dir}/captions.json", package_dir)
Dir.glob("#{@process_dir}/caption_*.vtt").each do |caption|
BigBlueButton.logger.debug(caption)
FileUtils.cp(caption, package_dir)
end
end
presentation_text = "#{@process_dir}/presentation_text.json"
FileUtils.cp(presentation_text, package_dir) if File.exist?(presentation_text)
notes = "#{@process_dir}/notes/notes.html"
FileUtils.cp(notes, package_dir) if File.exist?(notes)
processing_time = File.read("#{@process_dir}/processing_time")
@doc = Nokogiri::XML(File.read("#{@process_dir}/events.xml"))
# Retrieve record events and calculate total recording duration.
@rec_events = BigBlueButton::Events.match_start_and_stop_rec_events(
BigBlueButton::Events.get_start_and_stop_rec_events(@doc)
)
@recording_time = BigBlueButton::Events.get_recording_length(@doc)
@meeting_start = BigBlueButton::Events.first_event_timestamp(@doc)
@meeting_end = BigBlueButton::Events.last_event_timestamp(@doc)
@version_atleast_0_9_0 = BigBlueButton::Events.bbb_version_compare(
@doc, 0, 9, 0
)
@version_atleast_2_0_0 = BigBlueButton::Events.bbb_version_compare(
@doc, 2, 0, 0
)
@version_atleast_2_6_0 = BigBlueButton::Events.bbb_version_compare(
@doc, 2, 6, 0
)
BigBlueButton.logger.info('Creating metadata.xml')
#### INSTEAD OF CREATING THE WHOLE metadata.xml FILE AGAIN, ONLY ADD <playback>
# Copy metadata.xml from process_dir
FileUtils.cp("#{@process_dir}/metadata.xml", package_dir)
BigBlueButton.logger.info('Copied metadata.xml file')
# Update state and add playback to metadata.xml
## Load metadata.xml
metadata = Nokogiri::XML(File.read("#{package_dir}/metadata.xml"))
## Update state
recording = metadata.root
state = recording.at_xpath('state')
state.content = 'published'
published = recording.at_xpath('published')
published.content = 'true'
## Remove empty playback
metadata.search('recording/playback').each(&:remove)
## Add the actual playback
presentation = BigBlueButton::Presentation.get_presentation_for_preview(@process_dir.to_s)
Nokogiri::XML::Builder.with(metadata.at('recording')) do |xml|
xml.playback do
xml.format('presentation')
xml.link("#{playback_protocol}://#{playback_host}/playback/presentation/2.3/#{@meeting_id}")
xml.processing_time(processing_time.to_s)
xml.duration(@recording_time.to_s)
unless presentation.empty?
xml.extensions do
xml.preview do
xml.images do
presentation[:slides].each do |key, val|
attributes = { width: '176', height: '136', alt: val[:alt]&.to_s || '' }
xml.image(attributes) do
xml.text("#{playback_protocol}://#{playback_host}/presentation/#{@meeting_id}/presentation/#{presentation[:id]}/thumbnails/thumb-#{key}.png")
end
end
end
end
end
end
end
end
## Write the new metadata.xml
File.open("#{package_dir}/metadata.xml", 'w') { |file| file.write(Nokogiri::XML(metadata.to_xml, &:noblanks).root) }
BigBlueButton.logger.info('Added playback to metadata.xml')
# Create slides.xml
BigBlueButton.logger.info('Generating xml for slides and chat')
calculate_record_events_offset
# Write slides.xml to file
slides_doc = process_chat_messages(@doc, bbb_props)
File.open("#{package_dir}/slides_new.xml", 'w') { |f| f.puts slides_doc.target! }
process_presentation(package_dir)
process_deskshare_events(@doc)
process_poll_events(@doc, package_dir)
process_external_video_events(@doc, package_dir)
# Write deskshare.xml to file
File.open("#{package_dir}/#{@deskshare_xml_filename}", 'w') { |f| f.puts @deskshare_xml.target! }
BigBlueButton.logger.info('Copying files to package dir')
FileUtils.cp_r("#{@process_dir}/presentation", package_dir)
BigBlueButton.logger.info('Copied files to package dir')
BigBlueButton.logger.info('Publishing slides')
# Now publish this recording files by copying them into the publish folder.
FileUtils.mkdir_p publish_dir unless FileTest.directory?(publish_dir)
# Get raw size of presentation files
raw_dir = "#{@recording_dir}/raw/#{@meeting_id}"
# After all the processing we'll add the published format and raw sizes to the metadata file
BigBlueButton.add_raw_size_to_metadata(package_dir, raw_dir)
BigBlueButton.add_playback_size_to_metadata(package_dir)
FileUtils.cp_r(package_dir, publish_dir) # Copy all the files.
BigBlueButton.logger.info('Finished publishing script presentation.rb successfully.')
BigBlueButton.logger.info('Removing processed and published files.')
FileUtils.rm_r([Dir.glob("#{@process_dir}/*"), Dir.glob("#{target_dir}/*")])
rescue StandardError => e
BigBlueButton.logger.error(e.message)
e.backtrace.each do |traceline|
BigBlueButton.logger.error(traceline)
end
exit 1
end
generate_done_or_fail_file(true)
end
end
rescue StandardError => e
BigBlueButton.logger.error(e.message)
e.backtrace.each do |traceline|
BigBlueButton.logger.error(traceline)
end
generate_done_or_fail_file(false)
exit 1
end
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