Class: YoutubeTranscript2020

Inherits:
Object
  • Object
show all
Defined in:
lib/youtube_transcript2020.rb

Overview

github.com/jdepoix/youtube-transcript-api

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(id = nil, debug: false) ⇒ YoutubeTranscript2020

Returns a new instance of YoutubeTranscript2020.


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# File 'lib/youtube_transcript2020.rb', line 17

def initialize(id=nil, debug: false)

  return unless id

  @debug = debug

  @id = id[/https?:\/\//] ? YoutubeID.from(id) : id

  # Fetching the transcript from the following statement no longer works.
  # Instead, copy and paste the transcript from the YouTube video page into
  # a text file and import it.
  #
  #s = Net::HTTP.get(URI("http://video.google.com/timedtext?lang=en&v=#{@id}"))
  #@s = parse(s) unless s.empty?

  fetch_info(@id)

end

Instance Attribute Details

#author ⇒ Object (readonly)

Returns the value of attribute author.


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# File 'lib/youtube_transcript2020.rb', line 15

def author
  @author
end

#id ⇒ Object (readonly)

Returns the value of attribute id.


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# File 'lib/youtube_transcript2020.rb', line 15

def id
  @id
end

#title ⇒ Object (readonly)

Returns the value of attribute title.


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# File 'lib/youtube_transcript2020.rb', line 15

def title
  @title
end

#to_a ⇒ Object (readonly)

Returns the value of attribute to_a.


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# File 'lib/youtube_transcript2020.rb', line 15

def to_a
  @to_a
end

Instance Method Details

#import(obj) ⇒ Object

reads a plain text transcript which has been modified to include headings


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# File 'lib/youtube_transcript2020.rb', line 54

def import(obj)

  s = RXFReader.read(obj).first

  if s =~ /------+/ then

    header, body = s.split(/-----+/,2)

    h = SimpleConfig.new(header).to_h
    @id, @author, @title = h[:id], h[:author], h[:title]
    @s = body

  elsif File.extname(obj) == '.json'

    r = JSON.parse(s)
    @a = r.map {|x| [x['start'], x['text']]}
    @s = join_sentences(@a)

    return

  else

    body = obj
    raw_transcript = true

  end

  puts 'body: ' + body[0..400] if @debug
  a = body.lines.map(&:chomp).partition {|x| x =~ /\d+:\d+/ }
  @a = a[0].zip(a[1])

  @s = join_sentences(@a) if raw_transcript

end

#to_headings ⇒ Object

Outputs plain text containing the headings including timestamps note: This can be helpful for copyng and pasting directly into a YouTube comment


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# File 'lib/youtube_transcript2020.rb', line 137

def to_headings()

  @to_a.select {|timestamp, _| timestamp =~ / /}.map(&:first)

end

#to_html ⇒ Object

Outputs HTML containing the embedded video and transcription


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# File 'lib/youtube_transcript2020.rb', line 91

def to_html()

  url = 'https://www.youtube.com/embed/' + @id

  links = @a.map do |timestamp, s|

    seconds = Subunit.new(units={minutes:60, hours:60},
                timestamp.split(':').map(&:to_i)).to_i
    "<li><a href='%s?start=%s&autoplay=1' target='video'>%s</a><p>%s</p></li> " \
        % [url, seconds, timestamp, s]
  end

  puts '@html_embed: ' + @html_embed.inspect if @debug
  doc = Rexle.new(@html_embed.to_s)
  puts 'before attributes'
  doc.root.attributes[:name] = 'video'
  embed = doc.xml(declaration: false)
  puts 'embed: ' + embed.inspect if @debug
  #embed = @html_embed

<<EOF
<!DOCTYPE html>
<html lang="en">
<head>
  <title></title>
  <meta charset="utf-8" />
</head>
<body>
<div style="width: 1080px; background: white">
<div style="float:left; width: 580px; background: white">
#{embed}
<h1>#{@title}</h1>
</div>
<div style="float:right; width: 500px; overflow-y: scroll; height: 400px">
<ul>#{links.join("\n")}</ul>
</div>

</div>
</body>
</html>
EOF
end

#to_keywords(level: 2) ⇒ Object

returns a Hash object containing the frequenecy of each word level: 2 (ignores commond words including stop words) level: 3 (ignores dictionary words)


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# File 'lib/youtube_transcript2020.rb', line 147

def to_keywords(level: 2)
  Yawc.new(self.to_text(), level: level).to_h
end

#to_s ⇒ Object

returns the transcript in plain text including timestamps


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# File 'lib/youtube_transcript2020.rb', line 42

def to_s()

  h = {id: @id, title: @title, author: @author}
  SimpleConfig.new(h).to_s + "\n#{'-'*78}\n\n" + @s
end

#to_text ⇒ Object 


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# File 'lib/youtube_transcript2020.rb', line 48

def to_text()
  @a.map(&:last).join("\n")
end