Class: Captive::SRT

Inherits:
Object
  • Object
show all
Includes:
Base
Defined in:
lib/captive/formats/srt.rb

Instance Attribute Summary

Attributes included from Base

#cues

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Base

#as_json, included, #initialize, #method_missing, #respond_to_missing?, #save_as

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class Captive::Base

Class Method Details

.format_time(text) ⇒ Object 



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# File 'lib/captive/formats/srt.rb', line 66

def self.format_time(text)
  text.strip.gsub(/,/, '.')
end

.parse(blob:) ⇒ Object 



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# File 'lib/captive/formats/srt.rb', line 7

def self.parse(blob:)
  cue_list = []
  lines = blob.split("\n")
  count = 0
  state = :new_cue
  cue = nil

  lines.each_with_index do |line, _index|
    line.strip!
    case state
    when :new_cue
      next if line.empty? ## just another blank line, remain in new_cue state

      raise InvalidSubtitle, "Invalid Cue Number at line #{count}" if /^\d+$/.match(line).nil?

      state = :time
    when :time
      raise InvalidSubtitle, "Invalid Time Format at line #{count}" unless timecode?(line)

      start_time, end_time = line.split('-->').map(&:strip)
      cue = Cue.new(
        start_time: format_time(start_time),
        end_time: format_time(end_time)
      )
      state = :text
    when :text
      if line.empty?
        ## end of previous cue
        cue_list << cue
        cue = nil
        state = :new_cue
      else
        cue.add_text(line)
      end
    end
  end

  # Check to make sure we add the last cue if for some reason the file lacks an empty line at the end
  cue_list << cue unless cue.nil?

  # Return the cue_list
  cue_list
end

.timecode?(text) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/captive/formats/srt.rb', line 70

def self.timecode?(text)
  !!text.match(/^\d{2,}:\d{2}:\d{2},\d{3}.*\d{2,}:\d{2}:\d{2},\d{3}$/)
end

Instance Method Details

#to_s ⇒ Object 



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# File 'lib/captive/formats/srt.rb', line 51

def to_s
  string = String.new
  cues.each_with_index do |cue, index|
    string << (index + 1).to_s
    string << "\n"
    string << milliseconds_to_timecode(cue.start_time).gsub!('.', ',')
    string << ' --> '
    string << milliseconds_to_timecode(cue.end_time).gsub!('.', ',')
    string << "\n"
    string << cue.text
    string << "\n\n"
  end
  string
end