Class: Captcha

Inherits:
Object
  • Object
show all
Defined in:
app/models/captcha.rb

Constant Summary collapse

OPERATORS = 
['+','-','*','/','minute','hour','day','week','month','year'].shuffle
MAX_OP = 
4
MIN_OP = 
4

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(pointsize = 25, color_code = 'ffffff') ⇒ Captcha

Returns a new instance of Captcha.



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# File 'app/models/captcha.rb', line 9

def initialize(pointsize=25,color_code='ffffff')
	self.pointsize = pointsize.to_i
	self.pointsize = 25 if self.pointsize.to_i == 0
	self.color_code = color_code
	self.color_code = 'ffffff' if !self.color_code.present?
end

Instance Attribute Details

#color_code ⇒ Object

Returns the value of attribute color_code.



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# File 'app/models/captcha.rb', line 5

def color_code
  @color_code
end

#pointsize ⇒ Object

Returns the value of attribute pointsize.



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# File 'app/models/captcha.rb', line 5

def pointsize
  @pointsize
end

Class Method Details

.valid?(session, params) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/models/captcha.rb', line 72

def self.valid?(session,params)
  return params[:iq_captcha_result] && (session[:iq_captcha_answer].to_i == params[:iq_captcha_result].to_i)
end

Instance Method Details

#generate_captcha(text_on_captcha = 'default') ⇒ Object 



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# File 'app/models/captcha.rb', line 16

def generate_captcha(text_on_captcha='default')
  color_code = self.color_code
  pointsize = self.pointsize
  img = ImageList.new("public/iq_captcha_background.png")
  txt = Draw.new
  img.annotate(txt, 0,0,0,0, "#{text_on_captcha}"){
    txt.gravity = Magick::SouthGravity
    txt.pointsize = pointsize
    txt.stroke = '#000000'
    txt.fill = '#' + color_code
    txt.font_weight = Magick::BoldWeight
  }
  img.format = 'jpeg'
  return img
end

#generate_question_answer ⇒ Object 



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# File 'app/models/captcha.rb', line 32

def generate_question_answer
  op1 = rand(Captcha::MAX_OP)
  op2 = 1 + rand(Captcha::MIN_OP)
  operator = Captcha::OPERATORS[rand(Captcha::OPERATORS.size)]
  case operator
	when '+','-','*','/'
        answer = eval("#{op1}#{operator}#{op2}")
        question = "#{op1}#{operator}#{op2} = ?"
	when 'minute'
 op1 = 1 if op1 == 0
        answer = eval("#{op1.minute/1.second}")
        question = "#{op1} minutes = ? seconds"	  
	when 'hour'
        op1 = 1 if op1 == 0
        answer = eval("#{op1.hour/1.minute}")
        question = "#{op1} hours = ? minutes"
	when 'day'
        op1 = 1 if op1 == 0
        answer = eval("#{op1.day/1.hour}")
        question = "#{op1} days = ? hours"
	when 'week'
        op1 = 1 if op1 == 0
        answer = eval("#{op1.week/1.day}")
        question = "#{op1} weeks = ? days"
	when 'month'
        op1 = 1 if op1 == 0
        answer = eval("#{op1.month/1.day}")
        question = "#{op1} months = ? days"
	when 'year'
        op1 = 1 if op1 == 0
        answer = eval("#{op1.year/1.month}").to_i
        question = "#{op1} years = ? months"

	else
        answer = eval("#{op1}+#{op2}")
        question = "#{op1}+#{op2} = ?"	
  end
  return  question, answer
end