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Merge b2f5b1eb68
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@ -415,4 +415,90 @@ module Invidious::Routes::API::V1::Videos
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end
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end
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end
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# Fetches transcripts from YouTube
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#
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# Use the `lang` and `autogen` query parameter to select which transcript to fetch
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# Request without any URL parameters to see all the available transcripts.
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def self.transcripts(env)
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env.response.content_type = "application/json"
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id = env.params.url["id"]
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lang = env.params.query["lang"]?
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label = env.params.query["label"]?
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auto_generated = env.params.query["autogen"]? ? true : false
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# Return all available transcript options when none is given
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if !label && !lang
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begin
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video = get_video(id)
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rescue ex : NotFoundException
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return error_json(404, ex)
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rescue ex
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return error_json(500, ex)
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end
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response = JSON.build do |json|
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# The amount of transcripts available to fetch is the
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# same as the amount of captions available.
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available_transcripts = video.captions
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json.object do
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json.field "transcripts" do
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json.array do
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available_transcripts.each do |transcript|
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json.object do
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json.field "label", transcript.name
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json.field "languageCode", transcript.language_code
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json.field "autoGenerated", transcript.auto_generated
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if transcript.auto_generated
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json.field "url", "/api/v1/transcripts/#{id}?lang=#{URI.encode_www_form(transcript.language_code)}&autogen"
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else
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json.field "url", "/api/v1/transcripts/#{id}?lang=#{URI.encode_www_form(transcript.language_code)}"
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end
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end
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end
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end
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end
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end
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end
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return response
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end
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# If lang is not given then we attempt to fetch
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# the transcript through the given label
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if lang.nil?
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begin
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video = get_video(id)
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rescue ex : NotFoundException
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return error_json(404, ex)
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rescue ex
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return error_json(500, ex)
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end
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target_transcript = video.captions.select(&.name.== label)
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if target_transcript.empty?
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return error_json(404, NotFoundException.new("Requested transcript does not exist"))
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else
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target_transcript = target_transcript[0]
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lang, auto_generated = target_transcript.language_code, target_transcript.auto_generated
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end
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end
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params = Invidious::Videos::Transcript.generate_param(id, lang, auto_generated)
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begin
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transcript = Invidious::Videos::Transcript.from_raw(
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YoutubeAPI.get_transcript(params), lang, auto_generated
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)
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rescue ex : NotFoundException
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return error_json(404, ex)
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rescue ex
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return error_json(500, ex)
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end
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return transcript.to_json
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end
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end
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@ -236,6 +236,7 @@ module Invidious::Routing
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get "/api/v1/annotations/:id", {{namespace}}::Videos, :annotations
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get "/api/v1/comments/:id", {{namespace}}::Videos, :comments
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get "/api/v1/clips/:id", {{namespace}}::Videos, :clips
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get "/api/v1/transcripts/:id", {{namespace}}::Videos, :transcripts
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# Feeds
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get "/api/v1/trending", {{namespace}}::Feeds, :trending
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@ -122,5 +122,40 @@ module Invidious::Videos
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return vtt
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end
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def to_json(json : JSON::Builder)
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json.field "languageCode", @language_code
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json.field "autoGenerated", @auto_generated
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json.field "label", @label
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json.field "body" do
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json.array do
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@lines.each do |line|
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json.object do
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if line.is_a? HeadingLine
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json.field "type", "heading"
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else
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json.field "type", "regular"
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end
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json.field "startMs", line.start_ms.total_milliseconds
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json.field "endMs", line.end_ms.total_milliseconds
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json.field "line", line.line
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end
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end
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end
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end
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end
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def to_json
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JSON.build do |json|
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json.object do
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json.field "transcript" do
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json.object do
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to_json(json)
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end
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end
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end
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end
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end
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end
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end
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