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Refactor structure of caption.cr

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Rename CaptionsMetadata to Metadata
Nest Metadata under Captions
Unnest LANGUAGES constant from Metadata to main Captions module
This commit is contained in:
syeopite
2023-08-24 16:00:02 -07:00
parent 3509752b79
commit 1f7592e599
5 changed files with 90 additions and 88 deletions
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2
src/invidious/frontend/watch_page.cr
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@@ -7,7 +7,7 @@ module Invidious::Frontend::WatchPage
getter full_videos : Array(Hash(String, JSON::Any))
getter video_streams : Array(Hash(String, JSON::Any))
getter audio_streams : Array(Hash(String, JSON::Any))
getter captions : Array(Invidious::Videos::CaptionMetadata)
getter captions : Array(Invidious::Videos::Captions::Metadata)
def initialize(
@full_videos,

6
src/invidious/videos.cr
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@@ -24,7 +24,7 @@ struct Video
property updated : Time
@[DB::Field(ignore: true)]
@captions = [] of Invidious::Videos::CaptionMetadata
@captions = [] of Invidious::Videos::Captions::Metadata
@[DB::Field(ignore: true)]
property adaptive_fmts : Array(Hash(String, JSON::Any))?
@@ -215,9 +215,9 @@ struct Video
keywords.includes? "YouTube Red"
end
def captions : Array(Invidious::Videos::CaptionMetadata)
def captions : Array(Invidious::Videos::Captions::Metadata)
if @captions.empty? && @info.has_key?("captions")
@captions = Invidious::Videos::CaptionMetadata.from_yt_json(info["captions"])
@captions = Invidious::Videos::Captions::Metadata.from_yt_json(info["captions"])
end
return @captions

166
src/invidious/videos/caption.cr
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@@ -1,107 +1,109 @@
require "json"
module Invidious::Videos
struct CaptionMetadata
property name : String
property language_code : String
property base_url : String
module Captions
struct Metadata
property name : String
property language_code : String
property base_url : String
property auto_generated : Bool
property auto_generated : Bool
def initialize(@name, @language_code, @base_url, @auto_generated)
end
# Parse the JSON structure from Youtube
def self.from_yt_json(container : JSON::Any) : Array(CaptionMetadata)
caption_tracks = container
.dig?("playerCaptionsTracklistRenderer", "captionTracks")
.try &.as_a
captions_list = [] of CaptionMetadata
return captions_list if caption_tracks.nil?
caption_tracks.each do |caption|
name = caption["name"]["simpleText"]? || caption["name"]["runs"][0]["text"]
name = name.to_s.split(" - ")[0]
language_code = caption["languageCode"].to_s
base_url = caption["baseUrl"].to_s
auto_generated = false
if caption["kind"]? && caption["kind"] == "asr"
auto_generated = true
end
captions_list << CaptionMetadata.new(name, language_code, base_url, auto_generated)
def initialize(@name, @language_code, @base_url, @auto_generated)
end
return captions_list
end
# Parse the JSON structure from Youtube
def self.from_yt_json(container : JSON::Any) : Array(Captions::Metadata)
caption_tracks = container
.dig?("playerCaptionsTracklistRenderer", "captionTracks")
.try &.as_a
def timedtext_to_vtt(timedtext : String, tlang = nil) : String
# In the future, we could just directly work with the url. This is more of a POC
cues = [] of XML::Node
tree = XML.parse(timedtext)
tree = tree.children.first
captions_list = [] of Captions::Metadata
return captions_list if caption_tracks.nil?
tree.children.each do |item|
if item.name == "body"
item.children.each do |cue|
if cue.name == "p" && !(cue.children.size == 1 && cue.children[0].content == "\n")
cues << cue
caption_tracks.each do |caption|
name = caption["name"]["simpleText"]? || caption["name"]["runs"][0]["text"]
name = name.to_s.split(" - ")[0]
language_code = caption["languageCode"].to_s
base_url = caption["baseUrl"].to_s
auto_generated = false
if caption["kind"]? && caption["kind"] == "asr"
auto_generated = true
end
captions_list << Captions::Metadata.new(name, language_code, base_url, auto_generated)
end
return captions_list
end
def timedtext_to_vtt(timedtext : String, tlang = nil) : String
# In the future, we could just directly work with the url. This is more of a POC
cues = [] of XML::Node
tree = XML.parse(timedtext)
tree = tree.children.first
tree.children.each do |item|
if item.name == "body"
item.children.each do |cue|
if cue.name == "p" && !(cue.children.size == 1 && cue.children[0].content == "\n")
cues << cue
end
end
break
end
break
end
end
result = String.build do |result|
result << <<-END_VTT
WEBVTT
Kind: captions
Language: #{tlang || @language_code}
result = String.build do |result|
result << <<-END_VTT
WEBVTT
Kind: captions
Language: #{tlang || @language_code}
END_VTT
END_VTT
result << "\n\n"
result << "\n\n"
cues.each_with_index do |node, i|
start_time = node["t"].to_f.milliseconds
cues.each_with_index do |node, i|
start_time = node["t"].to_f.milliseconds
duration = node["d"]?.try &.to_f.milliseconds
duration = node["d"]?.try &.to_f.milliseconds
duration ||= start_time
duration ||= start_time
if cues.size > i + 1
end_time = cues[i + 1]["t"].to_f.milliseconds
else
end_time = start_time + duration
if cues.size > i + 1
end_time = cues[i + 1]["t"].to_f.milliseconds
else
end_time = start_time + duration
end
# start_time
result << start_time.hours.to_s.rjust(2, '0')
result << ':' << start_time.minutes.to_s.rjust(2, '0')
result << ':' << start_time.seconds.to_s.rjust(2, '0')
result << '.' << start_time.milliseconds.to_s.rjust(3, '0')
result << " --> "
# end_time
result << end_time.hours.to_s.rjust(2, '0')
result << ':' << end_time.minutes.to_s.rjust(2, '0')
result << ':' << end_time.seconds.to_s.rjust(2, '0')
result << '.' << end_time.milliseconds.to_s.rjust(3, '0')
result << "\n"
node.children.each do |s|
result << s.content
end
result << "\n"
result << "\n"
end
# start_time
result << start_time.hours.to_s.rjust(2, '0')
result << ':' << start_time.minutes.to_s.rjust(2, '0')
result << ':' << start_time.seconds.to_s.rjust(2, '0')
result << '.' << start_time.milliseconds.to_s.rjust(3, '0')
result << " --> "
# end_time
result << end_time.hours.to_s.rjust(2, '0')
result << ':' << end_time.minutes.to_s.rjust(2, '0')
result << ':' << end_time.seconds.to_s.rjust(2, '0')
result << '.' << end_time.milliseconds.to_s.rjust(3, '0')
result << "\n"
node.children.each do |s|
result << s.content
end
result << "\n"
result << "\n"
end
return result
end
return result
end
# List of all caption languages available on Youtube.

2
src/invidious/videos/transcript.cr
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@@ -37,7 +37,7 @@ module Invidious::Videos
# Convert into array of TranscriptLine
lines = self.parse(initial_data)
# Taken from Invidious::Videos::CaptionMetadata.timedtext_to_vtt()
# Taken from Invidious::Videos::Captions::Metadata.timedtext_to_vtt()
vtt = String.build do |vtt|
vtt << <<-END_VTT
WEBVTT

2
src/invidious/views/user/preferences.ecr
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@@ -89,7 +89,7 @@
<label for="captions[0]"><%= translate(locale, "preferences_captions_label") %></label>
<% preferences.captions.each_with_index do |caption, index| %>
<select class="pure-u-1-6" name="captions[<%= index %>]" id="captions[<%= index %>]">
<% Invidious::Videos::CaptionMetadata::LANGUAGES.each do |option| %>
<% Invidious::Videos::Captions::LANGUAGES.each do |option| %>
<option value="<%= option %>" <% if preferences.captions[index] == option %> selected <% end %>><%= translate(locale, option.blank? ? "none" : option) %></option>
<% end %>
</select>