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Add logic to swap languages in transcript widget

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This commit is contained in:
syeopite
2024-06-13 09:33:34 -07:00
parent 5ba6baea19
commit b781036404
4 changed files with 88 additions and 18 deletions
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64
src/invidious/routes/watch.cr
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@@ -43,6 +43,9 @@ module Invidious::Routes::Watch
show_transcripts ||= "0"
show_transcripts = show_transcripts == "1"
# Equal to a `caption.name` when set
selected_transcript = env.params.query["use_this_transcript"]?
preferences = env.get("preferences").as(Preferences)
user = env.get?("user").try &.as(User)
@@ -162,26 +165,55 @@ module Invidious::Routes::Watch
captions = captions - preferred_captions
if show_transcripts
# The transcripts available are the exact same as the amount of captions available. Thus:
if !preferred_captions.empty?
chosen_transcript = preferred_captions[0]
transcript_request_param = Invidious::Videos::Transcript.generate_param(
id, chosen_transcript.language_code, chosen_transcript.auto_generated
)
elsif !captions.empty?
chosen_transcript = captions[0]
transcript_request_param = Invidious::Videos::Transcript.generate_param(
id, chosen_transcript.language_code, chosen_transcript.auto_generated
)
# Transcripts can be mapped 1:1 to a video's captions.
# As such the amount of transcripts available is the same as the amount of captions available.
#
# To request transcripts we have to give a language code, and a boolean dictating whether or not
# it is auto-generated. These attributes can be retrieved from the video's caption metadata.
# First we check if a transcript has been explicitly selected.
# The `use_this_transcript` url parameter provides the label of the transcript the user wants.
if selected_transcript
selected_transcript = URI.decode_www_form(selected_transcript)
target_transcript = captions.select(&.name.== selected_transcript)
else
return error_template(404, "error_transcripts_none_available")
target_transcript = nil
end
transcript = Invidious::Videos::Transcript.from_raw(
YoutubeAPI.get_transcript(transcript_request_param),
chosen_transcript.language_code,
chosen_transcript.auto_generated,
# If the selected transcript has a match then we'll request that.
#
# If it does not match we'll try and request a transcript based on the user's
# preferred transcript
#
# If that also does not match then we'll just select the first transcript
# out of everything that's available.
#
# Raises when no matches are found
if target_transcript.is_a?(Array) && !target_transcript.empty?
target_transcript = target_transcript[0]
else
if !preferred_captions.empty?
target_transcript = preferred_captions[0]
elsif !captions.empty?
target_transcript = captions[0]
else
return error_template(404, "error_transcripts_none_available")
end
end
transcript_request_param = Invidious::Videos::Transcript.generate_param(
id, target_transcript.language_code, target_transcript.auto_generated
)
begin
transcript = Invidious::Videos::Transcript.from_raw(
YoutubeAPI.get_transcript(transcript_request_param),
target_transcript.language_code,
target_transcript.auto_generated,
)
rescue NotFoundException
return error_template(404, "error_transcripts_none_available")
end
else
transcript = nil
end