Class: NegativeCaptcha

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

Constant Summary collapse

@@test_mode = 
false

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(opts) ⇒ NegativeCaptcha 



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# File 'lib/negative_captcha.rb', line 20

def initialize(opts)
  self.secret = opts[:secret] ||
    Digest::MD5.hexdigest("this_is_a_secret_key")

  if opts.has_key?(:params)
    self.timestamp = opts[:params][:timestamp] || Time.now.to_i
  else
    self.timestamp = Time.now.to_i
  end

  self. = Digest::MD5.hexdigest(
    ([timestamp, secret] + Array(opts[:spinner])).join('-')
  )

  self.css = opts[:css] || "position: absolute; left: -2000px;"

  self.message = opts[:message] || <<-MESSAGE
Please try again.
This usually happens because an automated script attempted to submit this form.
  MESSAGE

  self.fields = opts[:fields].inject({}) do |hash, field_name|
    hash[field_name] = @@test_mode ? "test-#{field_name}" : Digest::MD5.hexdigest(
      [field_name, , secret].join('-')
    )

    hash
  end

  self.values = HashWithIndifferentAccess.new
  self.error = "No params provided"

  if opts[:params] && (opts[:params][:spinner] || opts[:params][:timestamp])
    process(opts[:params])
  end
end

Instance Attribute Details

#css ⇒ Object

Returns the value of attribute css.



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# File 'lib/negative_captcha.rb', line 6

def css
  @css
end

#error ⇒ Object

Returns the value of attribute error.



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# File 'lib/negative_captcha.rb', line 6

def error
  @error
end

#fields ⇒ Object

Returns the value of attribute fields.



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# File 'lib/negative_captcha.rb', line 6

def fields
  @fields
end

#message ⇒ Object

Returns the value of attribute message.



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# File 'lib/negative_captcha.rb', line 6

def message
  @message
end

#secret ⇒ Object

Returns the value of attribute secret.



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# File 'lib/negative_captcha.rb', line 6

def secret
  @secret
end

#spinner ⇒ Object

Returns the value of attribute spinner.



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# File 'lib/negative_captcha.rb', line 6

def 
  @spinner
end

#timestamp ⇒ Object

Returns the value of attribute timestamp.



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# File 'lib/negative_captcha.rb', line 6

def timestamp
  @timestamp
end

#values ⇒ Object

Returns the value of attribute values.



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# File 'lib/negative_captcha.rb', line 6

def values
  @values
end

Class Method Details

.test_mode=(value) ⇒ Object 



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# File 'lib/negative_captcha.rb', line 16

def self.test_mode=(value)
  class_variable_set(:@@test_mode, value)
end

Instance Method Details

#[](name) ⇒ Object 



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# File 'lib/negative_captcha.rb', line 57

def [](name)
  fields[name]
end

#process(params) ⇒ Object 



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# File 'lib/negative_captcha.rb', line 65

def process(params)
  timestamp_age = (Time.now.to_i - params[:timestamp].to_i).abs

  if params[:timestamp].nil? || timestamp_age > 86400
    self.error = "Error: Invalid timestamp.  #{message}"
  elsif params[:spinner] != 
    self.error = "Error: Invalid spinner.  #{message}"
  elsif fields.keys.detect {|name| params[name] && params[name] =~ /\S/}
    self.error = <<-ERROR
Error: Hidden form fields were submitted that should not have been. #{message}
    ERROR

    false
  else
    self.error = ""

    fields.each do |name, encrypted_name|
      self.values[name] = params[encrypted_name] if params.include? encrypted_name
    end
  end
end

#valid? ⇒ Boolean 



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# File 'lib/negative_captcha.rb', line 61

def valid?
  error.blank?
end