Module: IsGraffitiable::InstanceMethods

Defined in:
lib/is_graffitiable.rb

Instance Method Summary collapse

Instance Method Details

#graffiti_map ⇒ Object 



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# File 'lib/is_graffitiable.rb', line 27

def graffiti_map
  @graffiti_map = GraffitiMap.new
  graffitis.each do |graffiti|
    @graffiti_map[graffiti.name] = graffiti.value 
  end
  @graffiti_map
end

#initialize_graffitis ⇒ Object 



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# File 'lib/is_graffitiable.rb', line 35

def initialize_graffitis
  return unless @graffiti_map
  new_graffiti_map = @graffiti_map.clone
  @new_graffitis = []

  graffitis.each do |graffiti|
    new_graffiti_map.delete(graffiti.name)
  end

  @old_graffitis = graffitis.reject{|graffiti| @graffiti_map.keys.include?(graffiti.name)}

  new_graffiti_map.each do |key,value|
    @new_graffitis << Graffiti.create(:name => key, :value => value)
  end
end

#save_graffitis ⇒ Object 



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# File 'lib/is_graffitiable.rb', line 66

def save_graffitis
  return unless @graffiti_map
    
  self.class.transaction do
    if @old_graffitis.any?
      @old_graffitis.each(&:destroy)
    end
    @new_graffitis.each do |graffiti|
      graffitis << graffiti
    end
  end
  true
end

#validate_graffitis ⇒ Object 



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# File 'lib/is_graffitiable.rb', line 51

def validate_graffitis
  return true unless @graffiti_map

  @new_graffitis.each do |graffiti|
    # ideally we want to use graffiti.valid? method. However, at this point,
    # graffitiable_id and graffitiable_type hasn't been set yet. So we'll just have to do
    # our own validation here
    if graffiti.name.empty? or graffiti.value.empty?
      errors.add("Graffiti", "is invalid")
      return false
    end
  end
  return true
end