Class: EasyCaptcha::Espeak

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

Overview

espeak wrapper

Constant Summary collapse

DEFAULT_CONFIG = 
{
  amplitude: 80..120,
  pitch: 30..70,
  gap: 80,
  voice: nil
}.freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize {|_self| ... } ⇒ Espeak

generator for captcha images

Yields:

  • (_self)

Yield Parameters:



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# File 'lib/easy_captcha/espeak.rb', line 16

def initialize
  set_defaults
  yield self if block_given?
end

Instance Attribute Details

#amplitude ⇒ Object

return amplitude



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# File 'lib/easy_captcha/espeak.rb', line 29

def amplitude
  @amplitude.is_a?(Range) ? @amplitude.to_a.sample : @amplitude.to_i
end

#gap ⇒ Object 



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# File 'lib/easy_captcha/espeak.rb', line 38

def gap
  @gap.to_i
end

#pitch ⇒ Object

return amplitude



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# File 'lib/easy_captcha/espeak.rb', line 34

def pitch
  @pitch.is_a?(Range) ? @pitch.to_a.sample : @pitch.to_i
end

#voice ⇒ Object 



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# File 'lib/easy_captcha/espeak.rb', line 42

def voice
  (@voice.is_a?(Array) ? @voice.sample : @voice).try(:gsub, /[^A-Za-z0-9\-+]/, '')
end

Instance Method Details

#espeak_amplitude_param ⇒ Object 



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# File 'lib/easy_captcha/espeak.rb', line 62

def espeak_amplitude_param
  "-a #{amplitude}" unless @amplitude.nil?
end

#espeak_gap_param ⇒ Object 



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# File 'lib/easy_captcha/espeak.rb', line 70

def espeak_gap_param
  "-g #{gap}" unless @gap.nil?
end

#espeak_pitch_param ⇒ Object 



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# File 'lib/easy_captcha/espeak.rb', line 66

def espeak_pitch_param
  "-p #{pitch}" unless @pitch.nil?
end

#espeak_voice_param ⇒ Object 



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# File 'lib/easy_captcha/espeak.rb', line 74

def espeak_voice_param
  "-v '#{voice}'" unless @voice.nil?
end

#generate(captcha, wav_file) ⇒ Object

generate wav file by captcha



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# File 'lib/easy_captcha/espeak.rb', line 47

def generate(captcha, wav_file)
  cmd = [
    'espeak -g 10',
    espeak_amplitude_param,
    espeak_pitch_param,
    espeak_gap_param,
    espeak_voice_param,
    "-w #{wav_file}",
    "'#{get_code(captcha)}'"
  ].compact.join(' ')

  `#{cmd}`
  true
end

#get_code(captcha) ⇒ Object 



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# File 'lib/easy_captcha/espeak.rb', line 78

def get_code(captcha)
  case captcha
  when Captcha
    code = captcha.code
  when String
    code = captcha
  else
    fail ArgumentError, 'invalid captcha'
  end
  # add spaces
  code.each_char.to_a.join(' ')
end

#set_defaults ⇒ Object

set default values



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# File 'lib/easy_captcha/espeak.rb', line 22

def set_defaults
  DEFAULT_CONFIG.map do |k, v|
    send("#{k}=", v) if respond_to? "#{k}=".to_sym
  end
end